1 | /**
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2 | * @file
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3 | * Sequential API Internal module
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4 | *
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5 | */
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6 |
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7 | /*
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8 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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9 | * All rights reserved.
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10 | *
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11 | * Redistribution and use in source and binary forms, with or without modification,
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12 | * are permitted provided that the following conditions are met:
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13 | *
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14 | * 1. Redistributions of source code must retain the above copyright notice,
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15 | * this list of conditions and the following disclaimer.
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16 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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17 | * this list of conditions and the following disclaimer in the documentation
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18 | * and/or other materials provided with the distribution.
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19 | * 3. The name of the author may not be used to endorse or promote products
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20 | * derived from this software without specific prior written permission.
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21 | *
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22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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25 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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27 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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30 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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31 | * OF SUCH DAMAGE.
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32 | *
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33 | * This file is part of the lwIP TCP/IP stack.
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34 | *
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35 | * Author: Adam Dunkels <adam@sics.se>
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36 | *
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37 | */
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38 |
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39 | #include "lwip/opt.h"
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40 |
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41 | #if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
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42 |
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43 | #include "lwip/priv/api_msg.h"
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44 |
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45 | #include "lwip/ip.h"
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46 | #include "lwip/ip_addr.h"
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47 | #include "lwip/udp.h"
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48 | #include "lwip/tcp.h"
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49 | #include "lwip/raw.h"
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50 |
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51 | #include "lwip/memp.h"
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52 | #include "lwip/igmp.h"
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53 | #include "lwip/dns.h"
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54 | #include "lwip/mld6.h"
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55 | #include "lwip/priv/tcpip_priv.h"
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56 |
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57 | #include <string.h>
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58 |
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59 | /* netconns are polled once per second (e.g. continue write on memory error) */
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60 | #define NETCONN_TCP_POLL_INTERVAL 2
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61 |
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62 | #define SET_NONBLOCKING_CONNECT(conn, val) do { if (val) { \
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63 | netconn_set_flags(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT); \
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64 | } else { \
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65 | netconn_clear_flags(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT); }} while(0)
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66 | #define IN_NONBLOCKING_CONNECT(conn) netconn_is_flag_set(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT)
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67 |
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68 | #if LWIP_NETCONN_FULLDUPLEX
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69 | #define NETCONN_MBOX_VALID(conn, mbox) (sys_mbox_valid(mbox) && ((conn->flags & NETCONN_FLAG_MBOXINVALID) == 0))
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70 | #else
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71 | #define NETCONN_MBOX_VALID(conn, mbox) sys_mbox_valid(mbox)
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72 | #endif
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73 |
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74 | /* forward declarations */
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75 | #if LWIP_TCP
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76 | #if LWIP_TCPIP_CORE_LOCKING
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77 | #define WRITE_DELAYED , 1
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78 | #define WRITE_DELAYED_PARAM , u8_t delayed
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79 | #else /* LWIP_TCPIP_CORE_LOCKING */
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80 | #define WRITE_DELAYED
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81 | #define WRITE_DELAYED_PARAM
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82 | #endif /* LWIP_TCPIP_CORE_LOCKING */
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83 | static err_t lwip_netconn_do_writemore(struct netconn *conn WRITE_DELAYED_PARAM);
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84 | static err_t lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM);
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85 | #endif
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86 |
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87 | static void netconn_drain(struct netconn *conn);
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88 |
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89 | #if LWIP_TCPIP_CORE_LOCKING
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90 | #define TCPIP_APIMSG_ACK(m)
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91 | #else /* LWIP_TCPIP_CORE_LOCKING */
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92 | #define TCPIP_APIMSG_ACK(m) do { sys_sem_signal(LWIP_API_MSG_SEM(m)); } while(0)
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93 | #endif /* LWIP_TCPIP_CORE_LOCKING */
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94 |
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95 | #if LWIP_NETCONN_FULLDUPLEX
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96 | const u8_t netconn_deleted = 0;
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97 |
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98 | int
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99 | lwip_netconn_is_deallocated_msg(void *msg)
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100 | {
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101 | if (msg == &netconn_deleted) {
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102 | return 1;
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103 | }
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104 | return 0;
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105 | }
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106 | #endif /* LWIP_NETCONN_FULLDUPLEX */
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107 |
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108 | #if LWIP_TCP
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109 | const u8_t netconn_aborted = 0;
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110 | const u8_t netconn_reset = 0;
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111 | const u8_t netconn_closed = 0;
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112 |
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113 | /** Translate an error to a unique void* passed via an mbox */
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114 | static void *
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115 | lwip_netconn_err_to_msg(err_t err)
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116 | {
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117 | switch (err) {
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118 | case ERR_ABRT:
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119 | return LWIP_CONST_CAST(void *, &netconn_aborted);
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120 | case ERR_RST:
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121 | return LWIP_CONST_CAST(void *, &netconn_reset);
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122 | case ERR_CLSD:
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123 | return LWIP_CONST_CAST(void *, &netconn_closed);
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124 | default:
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125 | LWIP_ASSERT("unhandled error", err == ERR_OK);
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126 | return NULL;
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127 | }
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128 | }
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129 |
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130 | int
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131 | lwip_netconn_is_err_msg(void *msg, err_t *err)
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132 | {
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133 | LWIP_ASSERT("err != NULL", err != NULL);
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134 |
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135 | if (msg == &netconn_aborted) {
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136 | *err = ERR_ABRT;
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137 | return 1;
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138 | } else if (msg == &netconn_reset) {
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139 | *err = ERR_RST;
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140 | return 1;
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141 | } else if (msg == &netconn_closed) {
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142 | *err = ERR_CLSD;
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143 | return 1;
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144 | }
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145 | return 0;
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146 | }
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147 | #endif /* LWIP_TCP */
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148 |
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149 |
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150 | #if LWIP_RAW
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151 | /**
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152 | * Receive callback function for RAW netconns.
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153 | * Doesn't 'eat' the packet, only copies it and sends it to
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154 | * conn->recvmbox
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155 | *
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156 | * @see raw.h (struct raw_pcb.recv) for parameters and return value
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157 | */
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158 | static u8_t
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159 | recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
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160 | const ip_addr_t *addr)
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161 | {
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162 | struct pbuf *q;
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163 | struct netbuf *buf;
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164 | struct netconn *conn;
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165 |
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166 | LWIP_UNUSED_ARG(addr);
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167 | conn = (struct netconn *)arg;
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168 |
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169 | if ((conn != NULL) && NETCONN_MBOX_VALID(conn, &conn->recvmbox)) {
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170 | #if LWIP_SO_RCVBUF
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171 | int recv_avail;
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172 | SYS_ARCH_GET(conn->recv_avail, recv_avail);
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173 | if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) {
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174 | return 0;
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175 | }
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176 | #endif /* LWIP_SO_RCVBUF */
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177 | /* copy the whole packet into new pbufs */
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178 | q = pbuf_clone(PBUF_RAW, PBUF_RAM, p);
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179 | if (q != NULL) {
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180 | u16_t len;
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181 | buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
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182 | if (buf == NULL) {
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183 | pbuf_free(q);
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184 | return 0;
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185 | }
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186 |
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187 | buf->p = q;
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188 | buf->ptr = q;
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189 | ip_addr_copy(buf->addr, *ip_current_src_addr());
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190 | buf->port = pcb->protocol;
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191 |
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192 | len = q->tot_len;
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193 | if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
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194 | netbuf_delete(buf);
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195 | return 0;
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196 | } else {
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197 | #if LWIP_SO_RCVBUF
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198 | SYS_ARCH_INC(conn->recv_avail, len);
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199 | #endif /* LWIP_SO_RCVBUF */
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200 | /* Register event with callback */
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201 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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202 | }
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203 | }
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204 | }
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205 |
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206 | return 0; /* do not eat the packet */
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207 | }
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208 | #endif /* LWIP_RAW*/
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209 |
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210 | #if LWIP_UDP
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211 | /**
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212 | * Receive callback function for UDP netconns.
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213 | * Posts the packet to conn->recvmbox or deletes it on memory error.
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214 | *
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215 | * @see udp.h (struct udp_pcb.recv) for parameters
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216 | */
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217 | static void
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218 | recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
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219 | const ip_addr_t *addr, u16_t port)
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220 | {
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221 | struct netbuf *buf;
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222 | struct netconn *conn;
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223 | u16_t len;
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224 | #if LWIP_SO_RCVBUF
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225 | int recv_avail;
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226 | #endif /* LWIP_SO_RCVBUF */
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227 |
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228 | LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
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229 | LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
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230 | LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
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231 | conn = (struct netconn *)arg;
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232 |
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233 | if (conn == NULL) {
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234 | pbuf_free(p);
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235 | return;
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236 | }
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237 |
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238 | LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
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239 |
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240 | #if LWIP_SO_RCVBUF
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241 | SYS_ARCH_GET(conn->recv_avail, recv_avail);
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242 | if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox) ||
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243 | ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
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244 | #else /* LWIP_SO_RCVBUF */
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245 | if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox)) {
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246 | #endif /* LWIP_SO_RCVBUF */
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247 | pbuf_free(p);
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248 | return;
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249 | }
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250 |
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251 | buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
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252 | if (buf == NULL) {
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253 | pbuf_free(p);
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254 | return;
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255 | } else {
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256 | buf->p = p;
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257 | buf->ptr = p;
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258 | ip_addr_set(&buf->addr, addr);
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259 | buf->port = port;
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260 | #if LWIP_NETBUF_RECVINFO
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261 | if (conn->flags & NETCONN_FLAG_PKTINFO) {
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262 | /* get the UDP header - always in the first pbuf, ensured by udp_input */
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263 | const struct udp_hdr *udphdr = (const struct udp_hdr *)ip_next_header_ptr();
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264 | buf->flags = NETBUF_FLAG_DESTADDR;
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265 | ip_addr_set(&buf->toaddr, ip_current_dest_addr());
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266 | buf->toport_chksum = udphdr->dest;
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267 | }
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268 | #endif /* LWIP_NETBUF_RECVINFO */
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269 | }
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270 |
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271 | len = p->tot_len;
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272 | if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
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273 | netbuf_delete(buf);
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274 | return;
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275 | } else {
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276 | #if LWIP_SO_RCVBUF
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277 | SYS_ARCH_INC(conn->recv_avail, len);
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278 | #endif /* LWIP_SO_RCVBUF */
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279 | /* Register event with callback */
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280 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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281 | }
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282 | }
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283 | #endif /* LWIP_UDP */
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284 |
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285 | #if LWIP_TCP
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286 | /**
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287 | * Receive callback function for TCP netconns.
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288 | * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
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289 | *
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290 | * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
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291 | */
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292 | static err_t
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293 | recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
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294 | {
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295 | struct netconn *conn;
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296 | u16_t len;
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297 | void *msg;
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298 |
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299 | LWIP_UNUSED_ARG(pcb);
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300 | LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
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301 | LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
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302 | LWIP_ASSERT("err != ERR_OK unhandled", err == ERR_OK);
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303 | LWIP_UNUSED_ARG(err); /* for LWIP_NOASSERT */
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304 | conn = (struct netconn *)arg;
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305 |
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306 | if (conn == NULL) {
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307 | return ERR_VAL;
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308 | }
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309 | LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
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310 |
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311 | if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox)) {
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312 | /* recvmbox already deleted */
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313 | if (p != NULL) {
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314 | tcp_recved(pcb, p->tot_len);
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315 | pbuf_free(p);
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316 | }
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317 | return ERR_OK;
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318 | }
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319 | /* Unlike for UDP or RAW pcbs, don't check for available space
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320 | using recv_avail since that could break the connection
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321 | (data is already ACKed) */
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322 |
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323 | if (p != NULL) {
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324 | msg = p;
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325 | len = p->tot_len;
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326 | } else {
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327 | msg = LWIP_CONST_CAST(void *, &netconn_closed);
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328 | len = 0;
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329 | }
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330 |
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331 | if (sys_mbox_trypost(&conn->recvmbox, msg) != ERR_OK) {
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332 | /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */
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333 | return ERR_MEM;
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334 | } else {
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335 | #if LWIP_SO_RCVBUF
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336 | SYS_ARCH_INC(conn->recv_avail, len);
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337 | #endif /* LWIP_SO_RCVBUF */
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338 | /* Register event with callback */
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339 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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340 | }
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341 |
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342 | return ERR_OK;
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343 | }
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344 |
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345 | /**
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346 | * Poll callback function for TCP netconns.
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347 | * Wakes up an application thread that waits for a connection to close
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348 | * or data to be sent. The application thread then takes the
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349 | * appropriate action to go on.
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350 | *
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351 | * Signals the conn->sem.
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352 | * netconn_close waits for conn->sem if closing failed.
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353 | *
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354 | * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
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355 | */
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356 | static err_t
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357 | poll_tcp(void *arg, struct tcp_pcb *pcb)
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358 | {
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359 | struct netconn *conn = (struct netconn *)arg;
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360 |
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361 | LWIP_UNUSED_ARG(pcb);
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362 | LWIP_ASSERT("conn != NULL", (conn != NULL));
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363 |
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364 | if (conn->state == NETCONN_WRITE) {
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365 | lwip_netconn_do_writemore(conn WRITE_DELAYED);
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366 | } else if (conn->state == NETCONN_CLOSE) {
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367 | #if !LWIP_SO_SNDTIMEO && !LWIP_SO_LINGER
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368 | if (conn->current_msg && conn->current_msg->msg.sd.polls_left) {
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369 | conn->current_msg->msg.sd.polls_left--;
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370 | }
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371 | #endif /* !LWIP_SO_SNDTIMEO && !LWIP_SO_LINGER */
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372 | lwip_netconn_do_close_internal(conn WRITE_DELAYED);
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373 | }
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374 | /* @todo: implement connect timeout here? */
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375 |
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376 | /* Did a nonblocking write fail before? Then check available write-space. */
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377 | if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) {
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378 | /* If the queued byte- or pbuf-count drops below the configured low-water limit,
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379 | let select mark this pcb as writable again. */
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380 | if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
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381 | (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
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382 | netconn_clear_flags(conn, NETCONN_FLAG_CHECK_WRITESPACE);
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383 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
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384 | }
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385 | }
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386 |
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387 | return ERR_OK;
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388 | }
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389 |
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390 | /**
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391 | * Sent callback function for TCP netconns.
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392 | * Signals the conn->sem and calls API_EVENT.
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393 | * netconn_write waits for conn->sem if send buffer is low.
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394 | *
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395 | * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
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396 | */
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397 | static err_t
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398 | sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
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399 | {
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400 | struct netconn *conn = (struct netconn *)arg;
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401 |
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402 | LWIP_UNUSED_ARG(pcb);
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403 | LWIP_ASSERT("conn != NULL", (conn != NULL));
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404 |
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405 | if (conn) {
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406 | if (conn->state == NETCONN_WRITE) {
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407 | lwip_netconn_do_writemore(conn WRITE_DELAYED);
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408 | } else if (conn->state == NETCONN_CLOSE) {
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409 | lwip_netconn_do_close_internal(conn WRITE_DELAYED);
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410 | }
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411 |
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412 | /* If the queued byte- or pbuf-count drops below the configured low-water limit,
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413 | let select mark this pcb as writable again. */
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414 | if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
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415 | (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
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416 | netconn_clear_flags(conn, NETCONN_FLAG_CHECK_WRITESPACE);
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417 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
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418 | }
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419 | }
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420 |
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421 | return ERR_OK;
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422 | }
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423 |
|
---|
424 | /**
|
---|
425 | * Error callback function for TCP netconns.
|
---|
426 | * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
|
---|
427 | * The application thread has then to decide what to do.
|
---|
428 | *
|
---|
429 | * @see tcp.h (struct tcp_pcb.err) for parameters
|
---|
430 | */
|
---|
431 | static void
|
---|
432 | err_tcp(void *arg, err_t err)
|
---|
433 | {
|
---|
434 | struct netconn *conn;
|
---|
435 | enum netconn_state old_state;
|
---|
436 | void *mbox_msg;
|
---|
437 | SYS_ARCH_DECL_PROTECT(lev);
|
---|
438 |
|
---|
439 | conn = (struct netconn *)arg;
|
---|
440 | LWIP_ASSERT("conn != NULL", (conn != NULL));
|
---|
441 |
|
---|
442 | SYS_ARCH_PROTECT(lev);
|
---|
443 |
|
---|
444 | /* when err is called, the pcb is deallocated, so delete the reference */
|
---|
445 | conn->pcb.tcp = NULL;
|
---|
446 | /* store pending error */
|
---|
447 | conn->pending_err = err;
|
---|
448 | /* prevent application threads from blocking on 'recvmbox'/'acceptmbox' */
|
---|
449 | conn->flags |= NETCONN_FLAG_MBOXCLOSED;
|
---|
450 |
|
---|
451 | /* reset conn->state now before waking up other threads */
|
---|
452 | old_state = conn->state;
|
---|
453 | conn->state = NETCONN_NONE;
|
---|
454 |
|
---|
455 | SYS_ARCH_UNPROTECT(lev);
|
---|
456 |
|
---|
457 | /* Notify the user layer about a connection error. Used to signal select. */
|
---|
458 | API_EVENT(conn, NETCONN_EVT_ERROR, 0);
|
---|
459 | /* Try to release selects pending on 'read' or 'write', too.
|
---|
460 | They will get an error if they actually try to read or write. */
|
---|
461 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
462 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
463 |
|
---|
464 | mbox_msg = lwip_netconn_err_to_msg(err);
|
---|
465 | /* pass error message to recvmbox to wake up pending recv */
|
---|
466 | if (NETCONN_MBOX_VALID(conn, &conn->recvmbox)) {
|
---|
467 | /* use trypost to prevent deadlock */
|
---|
468 | sys_mbox_trypost(&conn->recvmbox, mbox_msg);
|
---|
469 | }
|
---|
470 | /* pass error message to acceptmbox to wake up pending accept */
|
---|
471 | if (NETCONN_MBOX_VALID(conn, &conn->acceptmbox)) {
|
---|
472 | /* use trypost to preven deadlock */
|
---|
473 | sys_mbox_trypost(&conn->acceptmbox, mbox_msg);
|
---|
474 | }
|
---|
475 |
|
---|
476 | if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) ||
|
---|
477 | (old_state == NETCONN_CONNECT)) {
|
---|
478 | /* calling lwip_netconn_do_writemore/lwip_netconn_do_close_internal is not necessary
|
---|
479 | since the pcb has already been deleted! */
|
---|
480 | int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn);
|
---|
481 | SET_NONBLOCKING_CONNECT(conn, 0);
|
---|
482 |
|
---|
483 | if (!was_nonblocking_connect) {
|
---|
484 | sys_sem_t *op_completed_sem;
|
---|
485 | /* set error return code */
|
---|
486 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
|
---|
487 | if (old_state == NETCONN_CLOSE) {
|
---|
488 | /* let close succeed: the connection is closed after all... */
|
---|
489 | conn->current_msg->err = ERR_OK;
|
---|
490 | } else {
|
---|
491 | /* Write and connect fail */
|
---|
492 | conn->current_msg->err = err;
|
---|
493 | }
|
---|
494 | op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg);
|
---|
495 | LWIP_ASSERT("inavlid op_completed_sem", sys_sem_valid(op_completed_sem));
|
---|
496 | conn->current_msg = NULL;
|
---|
497 | /* wake up the waiting task */
|
---|
498 | sys_sem_signal(op_completed_sem);
|
---|
499 | } else {
|
---|
500 | /* @todo: test what happens for error on nonblocking connect */
|
---|
501 | }
|
---|
502 | } else {
|
---|
503 | LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL);
|
---|
504 | }
|
---|
505 | }
|
---|
506 |
|
---|
507 | /**
|
---|
508 | * Setup a tcp_pcb with the correct callback function pointers
|
---|
509 | * and their arguments.
|
---|
510 | *
|
---|
511 | * @param conn the TCP netconn to setup
|
---|
512 | */
|
---|
513 | static void
|
---|
514 | setup_tcp(struct netconn *conn)
|
---|
515 | {
|
---|
516 | struct tcp_pcb *pcb;
|
---|
517 |
|
---|
518 | pcb = conn->pcb.tcp;
|
---|
519 | tcp_arg(pcb, conn);
|
---|
520 | tcp_recv(pcb, recv_tcp);
|
---|
521 | tcp_sent(pcb, sent_tcp);
|
---|
522 | tcp_poll(pcb, poll_tcp, NETCONN_TCP_POLL_INTERVAL);
|
---|
523 | tcp_err(pcb, err_tcp);
|
---|
524 | }
|
---|
525 |
|
---|
526 | /**
|
---|
527 | * Accept callback function for TCP netconns.
|
---|
528 | * Allocates a new netconn and posts that to conn->acceptmbox.
|
---|
529 | *
|
---|
530 | * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
|
---|
531 | */
|
---|
532 | static err_t
|
---|
533 | accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
|
---|
534 | {
|
---|
535 | struct netconn *newconn;
|
---|
536 | struct netconn *conn = (struct netconn *)arg;
|
---|
537 |
|
---|
538 | if (conn == NULL) {
|
---|
539 | return ERR_VAL;
|
---|
540 | }
|
---|
541 | if (!NETCONN_MBOX_VALID(conn, &conn->acceptmbox)) {
|
---|
542 | LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n"));
|
---|
543 | return ERR_VAL;
|
---|
544 | }
|
---|
545 |
|
---|
546 | if (newpcb == NULL) {
|
---|
547 | /* out-of-pcbs during connect: pass on this error to the application */
|
---|
548 | if (sys_mbox_trypost(&conn->acceptmbox, lwip_netconn_err_to_msg(ERR_ABRT)) == ERR_OK) {
|
---|
549 | /* Register event with callback */
|
---|
550 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
551 | }
|
---|
552 | return ERR_VAL;
|
---|
553 | }
|
---|
554 | LWIP_ASSERT("expect newpcb == NULL or err == ERR_OK", err == ERR_OK);
|
---|
555 | LWIP_UNUSED_ARG(err); /* for LWIP_NOASSERT */
|
---|
556 |
|
---|
557 | LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->state: %s\n", tcp_debug_state_str(newpcb->state)));
|
---|
558 |
|
---|
559 | /* We have to set the callback here even though
|
---|
560 | * the new socket is unknown. newconn->socket is marked as -1. */
|
---|
561 | newconn = netconn_alloc(conn->type, conn->callback);
|
---|
562 | if (newconn == NULL) {
|
---|
563 | /* outof netconns: pass on this error to the application */
|
---|
564 | if (sys_mbox_trypost(&conn->acceptmbox, lwip_netconn_err_to_msg(ERR_ABRT)) == ERR_OK) {
|
---|
565 | /* Register event with callback */
|
---|
566 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
567 | }
|
---|
568 | return ERR_MEM;
|
---|
569 | }
|
---|
570 | newconn->pcb.tcp = newpcb;
|
---|
571 | setup_tcp(newconn);
|
---|
572 |
|
---|
573 | /* handle backlog counter */
|
---|
574 | tcp_backlog_delayed(newpcb);
|
---|
575 |
|
---|
576 | if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) {
|
---|
577 | /* When returning != ERR_OK, the pcb is aborted in tcp_process(),
|
---|
578 | so do nothing here! */
|
---|
579 | /* remove all references to this netconn from the pcb */
|
---|
580 | struct tcp_pcb *pcb = newconn->pcb.tcp;
|
---|
581 | tcp_arg(pcb, NULL);
|
---|
582 | tcp_recv(pcb, NULL);
|
---|
583 | tcp_sent(pcb, NULL);
|
---|
584 | tcp_poll(pcb, NULL, 0);
|
---|
585 | tcp_err(pcb, NULL);
|
---|
586 | /* remove reference from to the pcb from this netconn */
|
---|
587 | newconn->pcb.tcp = NULL;
|
---|
588 | /* no need to drain since we know the recvmbox is empty. */
|
---|
589 | sys_mbox_free(&newconn->recvmbox);
|
---|
590 | sys_mbox_set_invalid(&newconn->recvmbox);
|
---|
591 | netconn_free(newconn);
|
---|
592 | return ERR_MEM;
|
---|
593 | } else {
|
---|
594 | /* Register event with callback */
|
---|
595 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
596 | }
|
---|
597 |
|
---|
598 | return ERR_OK;
|
---|
599 | }
|
---|
600 | #endif /* LWIP_TCP */
|
---|
601 |
|
---|
602 | /**
|
---|
603 | * Create a new pcb of a specific type.
|
---|
604 | * Called from lwip_netconn_do_newconn().
|
---|
605 | *
|
---|
606 | * @param msg the api_msg describing the connection type
|
---|
607 | */
|
---|
608 | static void
|
---|
609 | pcb_new(struct api_msg *msg)
|
---|
610 | {
|
---|
611 | enum lwip_ip_addr_type iptype = IPADDR_TYPE_V4;
|
---|
612 |
|
---|
613 | LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
|
---|
614 |
|
---|
615 | #if LWIP_IPV6 && LWIP_IPV4
|
---|
616 | /* IPv6: Dual-stack by default, unless netconn_set_ipv6only() is called */
|
---|
617 | if (NETCONNTYPE_ISIPV6(netconn_type(msg->conn))) {
|
---|
618 | iptype = IPADDR_TYPE_ANY;
|
---|
619 | }
|
---|
620 | #endif
|
---|
621 |
|
---|
622 | /* Allocate a PCB for this connection */
|
---|
623 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
624 | #if LWIP_RAW
|
---|
625 | case NETCONN_RAW:
|
---|
626 | msg->conn->pcb.raw = raw_new_ip_type(iptype, msg->msg.n.proto);
|
---|
627 | if (msg->conn->pcb.raw != NULL) {
|
---|
628 | #if LWIP_IPV6
|
---|
629 | /* ICMPv6 packets should always have checksum calculated by the stack as per RFC 3542 chapter 3.1 */
|
---|
630 | if (NETCONNTYPE_ISIPV6(msg->conn->type) && msg->conn->pcb.raw->protocol == IP6_NEXTH_ICMP6) {
|
---|
631 | msg->conn->pcb.raw->chksum_reqd = 1;
|
---|
632 | msg->conn->pcb.raw->chksum_offset = 2;
|
---|
633 | }
|
---|
634 | #endif /* LWIP_IPV6 */
|
---|
635 | raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
|
---|
636 | }
|
---|
637 | break;
|
---|
638 | #endif /* LWIP_RAW */
|
---|
639 | #if LWIP_UDP
|
---|
640 | case NETCONN_UDP:
|
---|
641 | msg->conn->pcb.udp = udp_new_ip_type(iptype);
|
---|
642 | if (msg->conn->pcb.udp != NULL) {
|
---|
643 | #if LWIP_UDPLITE
|
---|
644 | if (NETCONNTYPE_ISUDPLITE(msg->conn->type)) {
|
---|
645 | udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
|
---|
646 | }
|
---|
647 | #endif /* LWIP_UDPLITE */
|
---|
648 | if (NETCONNTYPE_ISUDPNOCHKSUM(msg->conn->type)) {
|
---|
649 | udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
|
---|
650 | }
|
---|
651 | udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
|
---|
652 | }
|
---|
653 | break;
|
---|
654 | #endif /* LWIP_UDP */
|
---|
655 | #if LWIP_TCP
|
---|
656 | case NETCONN_TCP:
|
---|
657 | msg->conn->pcb.tcp = tcp_new_ip_type(iptype);
|
---|
658 | if (msg->conn->pcb.tcp != NULL) {
|
---|
659 | setup_tcp(msg->conn);
|
---|
660 | }
|
---|
661 | break;
|
---|
662 | #endif /* LWIP_TCP */
|
---|
663 | default:
|
---|
664 | /* Unsupported netconn type, e.g. protocol disabled */
|
---|
665 | msg->err = ERR_VAL;
|
---|
666 | return;
|
---|
667 | }
|
---|
668 | if (msg->conn->pcb.ip == NULL) {
|
---|
669 | msg->err = ERR_MEM;
|
---|
670 | }
|
---|
671 | }
|
---|
672 |
|
---|
673 | /**
|
---|
674 | * Create a new pcb of a specific type inside a netconn.
|
---|
675 | * Called from netconn_new_with_proto_and_callback.
|
---|
676 | *
|
---|
677 | * @param m the api_msg describing the connection type
|
---|
678 | */
|
---|
679 | void
|
---|
680 | lwip_netconn_do_newconn(void *m)
|
---|
681 | {
|
---|
682 | struct api_msg *msg = (struct api_msg *)m;
|
---|
683 |
|
---|
684 | msg->err = ERR_OK;
|
---|
685 | if (msg->conn->pcb.tcp == NULL) {
|
---|
686 | pcb_new(msg);
|
---|
687 | }
|
---|
688 | /* Else? This "new" connection already has a PCB allocated. */
|
---|
689 | /* Is this an error condition? Should it be deleted? */
|
---|
690 | /* We currently just are happy and return. */
|
---|
691 |
|
---|
692 | TCPIP_APIMSG_ACK(msg);
|
---|
693 | }
|
---|
694 |
|
---|
695 | /**
|
---|
696 | * Create a new netconn (of a specific type) that has a callback function.
|
---|
697 | * The corresponding pcb is NOT created!
|
---|
698 | *
|
---|
699 | * @param t the type of 'connection' to create (@see enum netconn_type)
|
---|
700 | * @param callback a function to call on status changes (RX available, TX'ed)
|
---|
701 | * @return a newly allocated struct netconn or
|
---|
702 | * NULL on memory error
|
---|
703 | */
|
---|
704 | struct netconn *
|
---|
705 | netconn_alloc(enum netconn_type t, netconn_callback callback)
|
---|
706 | {
|
---|
707 | struct netconn *conn;
|
---|
708 | int size;
|
---|
709 | u8_t init_flags = 0;
|
---|
710 |
|
---|
711 | conn = (struct netconn *)memp_malloc(MEMP_NETCONN);
|
---|
712 | if (conn == NULL) {
|
---|
713 | return NULL;
|
---|
714 | }
|
---|
715 |
|
---|
716 | conn->pending_err = ERR_OK;
|
---|
717 | conn->type = t;
|
---|
718 | conn->pcb.tcp = NULL;
|
---|
719 |
|
---|
720 | /* If all sizes are the same, every compiler should optimize this switch to nothing */
|
---|
721 | switch (NETCONNTYPE_GROUP(t)) {
|
---|
722 | #if LWIP_RAW
|
---|
723 | case NETCONN_RAW:
|
---|
724 | size = DEFAULT_RAW_RECVMBOX_SIZE;
|
---|
725 | break;
|
---|
726 | #endif /* LWIP_RAW */
|
---|
727 | #if LWIP_UDP
|
---|
728 | case NETCONN_UDP:
|
---|
729 | size = DEFAULT_UDP_RECVMBOX_SIZE;
|
---|
730 | #if LWIP_NETBUF_RECVINFO
|
---|
731 | init_flags |= NETCONN_FLAG_PKTINFO;
|
---|
732 | #endif /* LWIP_NETBUF_RECVINFO */
|
---|
733 | break;
|
---|
734 | #endif /* LWIP_UDP */
|
---|
735 | #if LWIP_TCP
|
---|
736 | case NETCONN_TCP:
|
---|
737 | size = DEFAULT_TCP_RECVMBOX_SIZE;
|
---|
738 | break;
|
---|
739 | #endif /* LWIP_TCP */
|
---|
740 | default:
|
---|
741 | LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
|
---|
742 | goto free_and_return;
|
---|
743 | }
|
---|
744 |
|
---|
745 | if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) {
|
---|
746 | goto free_and_return;
|
---|
747 | }
|
---|
748 | #if !LWIP_NETCONN_SEM_PER_THREAD
|
---|
749 | if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) {
|
---|
750 | sys_mbox_free(&conn->recvmbox);
|
---|
751 | goto free_and_return;
|
---|
752 | }
|
---|
753 | #endif
|
---|
754 |
|
---|
755 | #if LWIP_TCP
|
---|
756 | sys_mbox_set_invalid(&conn->acceptmbox);
|
---|
757 | #endif
|
---|
758 | conn->state = NETCONN_NONE;
|
---|
759 | #if LWIP_SOCKET
|
---|
760 | /* initialize socket to -1 since 0 is a valid socket */
|
---|
761 | conn->socket = -1;
|
---|
762 | #endif /* LWIP_SOCKET */
|
---|
763 | conn->callback = callback;
|
---|
764 | #if LWIP_TCP
|
---|
765 | conn->current_msg = NULL;
|
---|
766 | #endif /* LWIP_TCP */
|
---|
767 | #if LWIP_SO_SNDTIMEO
|
---|
768 | conn->send_timeout = 0;
|
---|
769 | #endif /* LWIP_SO_SNDTIMEO */
|
---|
770 | #if LWIP_SO_RCVTIMEO
|
---|
771 | conn->recv_timeout = 0;
|
---|
772 | #endif /* LWIP_SO_RCVTIMEO */
|
---|
773 | #if LWIP_SO_RCVBUF
|
---|
774 | conn->recv_bufsize = RECV_BUFSIZE_DEFAULT;
|
---|
775 | conn->recv_avail = 0;
|
---|
776 | #endif /* LWIP_SO_RCVBUF */
|
---|
777 | #if LWIP_SO_LINGER
|
---|
778 | conn->linger = -1;
|
---|
779 | #endif /* LWIP_SO_LINGER */
|
---|
780 | conn->flags = init_flags;
|
---|
781 | return conn;
|
---|
782 | free_and_return:
|
---|
783 | memp_free(MEMP_NETCONN, conn);
|
---|
784 | return NULL;
|
---|
785 | }
|
---|
786 |
|
---|
787 | /**
|
---|
788 | * Delete a netconn and all its resources.
|
---|
789 | * The pcb is NOT freed (since we might not be in the right thread context do this).
|
---|
790 | *
|
---|
791 | * @param conn the netconn to free
|
---|
792 | */
|
---|
793 | void
|
---|
794 | netconn_free(struct netconn *conn)
|
---|
795 | {
|
---|
796 | LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
|
---|
797 |
|
---|
798 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
799 | /* in fullduplex, netconn is drained here */
|
---|
800 | netconn_drain(conn);
|
---|
801 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
802 |
|
---|
803 | LWIP_ASSERT("recvmbox must be deallocated before calling this function",
|
---|
804 | !sys_mbox_valid(&conn->recvmbox));
|
---|
805 | #if LWIP_TCP
|
---|
806 | LWIP_ASSERT("acceptmbox must be deallocated before calling this function",
|
---|
807 | !sys_mbox_valid(&conn->acceptmbox));
|
---|
808 | #endif /* LWIP_TCP */
|
---|
809 |
|
---|
810 | #if !LWIP_NETCONN_SEM_PER_THREAD
|
---|
811 | sys_sem_free(&conn->op_completed);
|
---|
812 | sys_sem_set_invalid(&conn->op_completed);
|
---|
813 | #endif
|
---|
814 |
|
---|
815 | memp_free(MEMP_NETCONN, conn);
|
---|
816 | }
|
---|
817 |
|
---|
818 | /**
|
---|
819 | * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in
|
---|
820 | * these mboxes
|
---|
821 | *
|
---|
822 | * @param conn the netconn to free
|
---|
823 | * @bytes_drained bytes drained from recvmbox
|
---|
824 | * @accepts_drained pending connections drained from acceptmbox
|
---|
825 | */
|
---|
826 | static void
|
---|
827 | netconn_drain(struct netconn *conn)
|
---|
828 | {
|
---|
829 | void *mem;
|
---|
830 |
|
---|
831 | /* This runs when mbox and netconn are marked as closed,
|
---|
832 | so we don't need to lock against rx packets */
|
---|
833 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
834 | LWIP_ASSERT("netconn marked closed", conn->flags & NETCONN_FLAG_MBOXINVALID);
|
---|
835 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
836 |
|
---|
837 | /* Delete and drain the recvmbox. */
|
---|
838 | if (sys_mbox_valid(&conn->recvmbox)) {
|
---|
839 | while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
|
---|
840 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
841 | if (!lwip_netconn_is_deallocated_msg(mem))
|
---|
842 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
843 | {
|
---|
844 | #if LWIP_TCP
|
---|
845 | if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) {
|
---|
846 | err_t err;
|
---|
847 | if (!lwip_netconn_is_err_msg(mem, &err)) {
|
---|
848 | pbuf_free((struct pbuf *)mem);
|
---|
849 | }
|
---|
850 | } else
|
---|
851 | #endif /* LWIP_TCP */
|
---|
852 | {
|
---|
853 | netbuf_delete((struct netbuf *)mem);
|
---|
854 | }
|
---|
855 | }
|
---|
856 | }
|
---|
857 | sys_mbox_free(&conn->recvmbox);
|
---|
858 | sys_mbox_set_invalid(&conn->recvmbox);
|
---|
859 | }
|
---|
860 |
|
---|
861 | /* Delete and drain the acceptmbox. */
|
---|
862 | #if LWIP_TCP
|
---|
863 | if (sys_mbox_valid(&conn->acceptmbox)) {
|
---|
864 | while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
|
---|
865 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
866 | if (!lwip_netconn_is_deallocated_msg(mem))
|
---|
867 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
868 | {
|
---|
869 | err_t err;
|
---|
870 | if (!lwip_netconn_is_err_msg(mem, &err)) {
|
---|
871 | struct netconn *newconn = (struct netconn *)mem;
|
---|
872 | /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */
|
---|
873 | /* pcb might be set to NULL already by err_tcp() */
|
---|
874 | /* drain recvmbox */
|
---|
875 | netconn_drain(newconn);
|
---|
876 | if (newconn->pcb.tcp != NULL) {
|
---|
877 | tcp_abort(newconn->pcb.tcp);
|
---|
878 | newconn->pcb.tcp = NULL;
|
---|
879 | }
|
---|
880 | netconn_free(newconn);
|
---|
881 | }
|
---|
882 | }
|
---|
883 | }
|
---|
884 | sys_mbox_free(&conn->acceptmbox);
|
---|
885 | sys_mbox_set_invalid(&conn->acceptmbox);
|
---|
886 | }
|
---|
887 | #endif /* LWIP_TCP */
|
---|
888 | }
|
---|
889 |
|
---|
890 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
891 | static void
|
---|
892 | netconn_mark_mbox_invalid(struct netconn *conn)
|
---|
893 | {
|
---|
894 | int i, num_waiting;
|
---|
895 | void *msg = LWIP_CONST_CAST(void *, &netconn_deleted);
|
---|
896 |
|
---|
897 | /* Prevent new calls/threads from reading from the mbox */
|
---|
898 | conn->flags |= NETCONN_FLAG_MBOXINVALID;
|
---|
899 |
|
---|
900 | SYS_ARCH_LOCKED(num_waiting = conn->mbox_threads_waiting);
|
---|
901 | for (i = 0; i < num_waiting; i++) {
|
---|
902 | if (sys_mbox_valid_val(conn->recvmbox)) {
|
---|
903 | sys_mbox_trypost(&conn->recvmbox, msg);
|
---|
904 | } else {
|
---|
905 | sys_mbox_trypost(&conn->acceptmbox, msg);
|
---|
906 | }
|
---|
907 | }
|
---|
908 | }
|
---|
909 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
910 |
|
---|
911 | #if LWIP_TCP
|
---|
912 | /**
|
---|
913 | * Internal helper function to close a TCP netconn: since this sometimes
|
---|
914 | * doesn't work at the first attempt, this function is called from multiple
|
---|
915 | * places.
|
---|
916 | *
|
---|
917 | * @param conn the TCP netconn to close
|
---|
918 | */
|
---|
919 | static err_t
|
---|
920 | lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM)
|
---|
921 | {
|
---|
922 | err_t err;
|
---|
923 | u8_t shut, shut_rx, shut_tx, shut_close;
|
---|
924 | u8_t close_finished = 0;
|
---|
925 | struct tcp_pcb *tpcb;
|
---|
926 | #if LWIP_SO_LINGER
|
---|
927 | u8_t linger_wait_required = 0;
|
---|
928 | #endif /* LWIP_SO_LINGER */
|
---|
929 |
|
---|
930 | LWIP_ASSERT("invalid conn", (conn != NULL));
|
---|
931 | LWIP_ASSERT("this is for tcp netconns only", (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP));
|
---|
932 | LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
|
---|
933 | LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
|
---|
934 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
|
---|
935 |
|
---|
936 | tpcb = conn->pcb.tcp;
|
---|
937 | shut = conn->current_msg->msg.sd.shut;
|
---|
938 | shut_rx = shut & NETCONN_SHUT_RD;
|
---|
939 | shut_tx = shut & NETCONN_SHUT_WR;
|
---|
940 | /* shutting down both ends is the same as closing
|
---|
941 | (also if RD or WR side was shut down before already) */
|
---|
942 | if (shut == NETCONN_SHUT_RDWR) {
|
---|
943 | shut_close = 1;
|
---|
944 | } else if (shut_rx &&
|
---|
945 | ((tpcb->state == FIN_WAIT_1) ||
|
---|
946 | (tpcb->state == FIN_WAIT_2) ||
|
---|
947 | (tpcb->state == CLOSING))) {
|
---|
948 | shut_close = 1;
|
---|
949 | } else if (shut_tx && ((tpcb->flags & TF_RXCLOSED) != 0)) {
|
---|
950 | shut_close = 1;
|
---|
951 | } else {
|
---|
952 | shut_close = 0;
|
---|
953 | }
|
---|
954 |
|
---|
955 | /* Set back some callback pointers */
|
---|
956 | if (shut_close) {
|
---|
957 | tcp_arg(tpcb, NULL);
|
---|
958 | }
|
---|
959 | if (tpcb->state == LISTEN) {
|
---|
960 | tcp_accept(tpcb, NULL);
|
---|
961 | } else {
|
---|
962 | /* some callbacks have to be reset if tcp_close is not successful */
|
---|
963 | if (shut_rx) {
|
---|
964 | tcp_recv(tpcb, NULL);
|
---|
965 | tcp_accept(tpcb, NULL);
|
---|
966 | }
|
---|
967 | if (shut_tx) {
|
---|
968 | tcp_sent(tpcb, NULL);
|
---|
969 | }
|
---|
970 | if (shut_close) {
|
---|
971 | tcp_poll(tpcb, NULL, 0);
|
---|
972 | tcp_err(tpcb, NULL);
|
---|
973 | }
|
---|
974 | }
|
---|
975 | /* Try to close the connection */
|
---|
976 | if (shut_close) {
|
---|
977 | #if LWIP_SO_LINGER
|
---|
978 | /* check linger possibilites before calling tcp_close */
|
---|
979 | err = ERR_OK;
|
---|
980 | /* linger enabled/required at all? (i.e. is there untransmitted data left?) */
|
---|
981 | if ((conn->linger >= 0) && (conn->pcb.tcp->unsent || conn->pcb.tcp->unacked)) {
|
---|
982 | if ((conn->linger == 0)) {
|
---|
983 | /* data left but linger prevents waiting */
|
---|
984 | tcp_abort(tpcb);
|
---|
985 | tpcb = NULL;
|
---|
986 | } else if (conn->linger > 0) {
|
---|
987 | /* data left and linger says we should wait */
|
---|
988 | if (netconn_is_nonblocking(conn)) {
|
---|
989 | /* data left on a nonblocking netconn -> cannot linger */
|
---|
990 | err = ERR_WOULDBLOCK;
|
---|
991 | } else if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >=
|
---|
992 | (conn->linger * 1000)) {
|
---|
993 | /* data left but linger timeout has expired (this happens on further
|
---|
994 | calls to this function through poll_tcp */
|
---|
995 | tcp_abort(tpcb);
|
---|
996 | tpcb = NULL;
|
---|
997 | } else {
|
---|
998 | /* data left -> need to wait for ACK after successful close */
|
---|
999 | linger_wait_required = 1;
|
---|
1000 | }
|
---|
1001 | }
|
---|
1002 | }
|
---|
1003 | if ((err == ERR_OK) && (tpcb != NULL))
|
---|
1004 | #endif /* LWIP_SO_LINGER */
|
---|
1005 | {
|
---|
1006 | err = tcp_close(tpcb);
|
---|
1007 | }
|
---|
1008 | } else {
|
---|
1009 | err = tcp_shutdown(tpcb, shut_rx, shut_tx);
|
---|
1010 | }
|
---|
1011 | if (err == ERR_OK) {
|
---|
1012 | close_finished = 1;
|
---|
1013 | #if LWIP_SO_LINGER
|
---|
1014 | if (linger_wait_required) {
|
---|
1015 | /* wait for ACK of all unsent/unacked data by just getting called again */
|
---|
1016 | close_finished = 0;
|
---|
1017 | err = ERR_INPROGRESS;
|
---|
1018 | }
|
---|
1019 | #endif /* LWIP_SO_LINGER */
|
---|
1020 | } else {
|
---|
1021 | if (err == ERR_MEM) {
|
---|
1022 | /* Closing failed because of memory shortage, try again later. Even for
|
---|
1023 | nonblocking netconns, we have to wait since no standard socket application
|
---|
1024 | is prepared for close failing because of resource shortage.
|
---|
1025 | Check the timeout: this is kind of an lwip addition to the standard sockets:
|
---|
1026 | we wait for some time when failing to allocate a segment for the FIN */
|
---|
1027 | #if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER
|
---|
1028 | s32_t close_timeout = LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT;
|
---|
1029 | #if LWIP_SO_SNDTIMEO
|
---|
1030 | if (conn->send_timeout > 0) {
|
---|
1031 | close_timeout = conn->send_timeout;
|
---|
1032 | }
|
---|
1033 | #endif /* LWIP_SO_SNDTIMEO */
|
---|
1034 | #if LWIP_SO_LINGER
|
---|
1035 | if (conn->linger >= 0) {
|
---|
1036 | /* use linger timeout (seconds) */
|
---|
1037 | close_timeout = conn->linger * 1000U;
|
---|
1038 | }
|
---|
1039 | #endif
|
---|
1040 | if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >= close_timeout) {
|
---|
1041 | #else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
|
---|
1042 | if (conn->current_msg->msg.sd.polls_left == 0) {
|
---|
1043 | #endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
|
---|
1044 | close_finished = 1;
|
---|
1045 | if (shut_close) {
|
---|
1046 | /* in this case, we want to RST the connection */
|
---|
1047 | tcp_abort(tpcb);
|
---|
1048 | err = ERR_OK;
|
---|
1049 | }
|
---|
1050 | }
|
---|
1051 | } else {
|
---|
1052 | /* Closing failed for a non-memory error: give up */
|
---|
1053 | close_finished = 1;
|
---|
1054 | }
|
---|
1055 | }
|
---|
1056 | if (close_finished) {
|
---|
1057 | /* Closing done (succeeded, non-memory error, nonblocking error or timeout) */
|
---|
1058 | sys_sem_t *op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg);
|
---|
1059 | conn->current_msg->err = err;
|
---|
1060 | conn->current_msg = NULL;
|
---|
1061 | conn->state = NETCONN_NONE;
|
---|
1062 | if (err == ERR_OK) {
|
---|
1063 | if (shut_close) {
|
---|
1064 | /* Set back some callback pointers as conn is going away */
|
---|
1065 | conn->pcb.tcp = NULL;
|
---|
1066 | /* Trigger select() in socket layer. Make sure everybody notices activity
|
---|
1067 | on the connection, error first! */
|
---|
1068 | API_EVENT(conn, NETCONN_EVT_ERROR, 0);
|
---|
1069 | }
|
---|
1070 | if (shut_rx) {
|
---|
1071 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
1072 | }
|
---|
1073 | if (shut_tx) {
|
---|
1074 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
1075 | }
|
---|
1076 | }
|
---|
1077 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1078 | if (delayed)
|
---|
1079 | #endif
|
---|
1080 | {
|
---|
1081 | /* wake up the application task */
|
---|
1082 | sys_sem_signal(op_completed_sem);
|
---|
1083 | }
|
---|
1084 | return ERR_OK;
|
---|
1085 | }
|
---|
1086 | if (!close_finished) {
|
---|
1087 | /* Closing failed and we want to wait: restore some of the callbacks */
|
---|
1088 | /* Closing of listen pcb will never fail! */
|
---|
1089 | LWIP_ASSERT("Closing a listen pcb may not fail!", (tpcb->state != LISTEN));
|
---|
1090 | if (shut_tx) {
|
---|
1091 | tcp_sent(tpcb, sent_tcp);
|
---|
1092 | }
|
---|
1093 | /* when waiting for close, set up poll interval to 500ms */
|
---|
1094 | tcp_poll(tpcb, poll_tcp, 1);
|
---|
1095 | tcp_err(tpcb, err_tcp);
|
---|
1096 | tcp_arg(tpcb, conn);
|
---|
1097 | /* don't restore recv callback: we don't want to receive any more data */
|
---|
1098 | }
|
---|
1099 | /* If closing didn't succeed, we get called again either
|
---|
1100 | from poll_tcp or from sent_tcp */
|
---|
1101 | LWIP_ASSERT("err != ERR_OK", err != ERR_OK);
|
---|
1102 | return err;
|
---|
1103 | }
|
---|
1104 | #endif /* LWIP_TCP */
|
---|
1105 |
|
---|
1106 | /**
|
---|
1107 | * Delete the pcb inside a netconn.
|
---|
1108 | * Called from netconn_delete.
|
---|
1109 | *
|
---|
1110 | * @param m the api_msg pointing to the connection
|
---|
1111 | */
|
---|
1112 | void
|
---|
1113 | lwip_netconn_do_delconn(void *m)
|
---|
1114 | {
|
---|
1115 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1116 |
|
---|
1117 | enum netconn_state state = msg->conn->state;
|
---|
1118 | LWIP_ASSERT("netconn state error", /* this only happens for TCP netconns */
|
---|
1119 | (state == NETCONN_NONE) || (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP));
|
---|
1120 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
1121 | /* In full duplex mode, blocking write/connect is aborted with ERR_CLSD */
|
---|
1122 | if (state != NETCONN_NONE) {
|
---|
1123 | if ((state == NETCONN_WRITE) ||
|
---|
1124 | ((state == NETCONN_CONNECT) && !IN_NONBLOCKING_CONNECT(msg->conn))) {
|
---|
1125 | /* close requested, abort running write/connect */
|
---|
1126 | sys_sem_t *op_completed_sem;
|
---|
1127 | LWIP_ASSERT("msg->conn->current_msg != NULL", msg->conn->current_msg != NULL);
|
---|
1128 | op_completed_sem = LWIP_API_MSG_SEM(msg->conn->current_msg);
|
---|
1129 | msg->conn->current_msg->err = ERR_CLSD;
|
---|
1130 | msg->conn->current_msg = NULL;
|
---|
1131 | msg->conn->state = NETCONN_NONE;
|
---|
1132 | sys_sem_signal(op_completed_sem);
|
---|
1133 | }
|
---|
1134 | }
|
---|
1135 | #else /* LWIP_NETCONN_FULLDUPLEX */
|
---|
1136 | if (((state != NETCONN_NONE) &&
|
---|
1137 | (state != NETCONN_LISTEN) &&
|
---|
1138 | (state != NETCONN_CONNECT)) ||
|
---|
1139 | ((state == NETCONN_CONNECT) && !IN_NONBLOCKING_CONNECT(msg->conn))) {
|
---|
1140 | /* This means either a blocking write or blocking connect is running
|
---|
1141 | (nonblocking write returns and sets state to NONE) */
|
---|
1142 | msg->err = ERR_INPROGRESS;
|
---|
1143 | } else
|
---|
1144 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
1145 | {
|
---|
1146 | LWIP_ASSERT("blocking connect in progress",
|
---|
1147 | (state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn));
|
---|
1148 | msg->err = ERR_OK;
|
---|
1149 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
1150 | /* Mark mboxes invalid */
|
---|
1151 | netconn_mark_mbox_invalid(msg->conn);
|
---|
1152 | #else /* LWIP_NETCONN_FULLDUPLEX */
|
---|
1153 | netconn_drain(msg->conn);
|
---|
1154 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
1155 |
|
---|
1156 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1157 |
|
---|
1158 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
1159 | #if LWIP_RAW
|
---|
1160 | case NETCONN_RAW:
|
---|
1161 | raw_remove(msg->conn->pcb.raw);
|
---|
1162 | break;
|
---|
1163 | #endif /* LWIP_RAW */
|
---|
1164 | #if LWIP_UDP
|
---|
1165 | case NETCONN_UDP:
|
---|
1166 | msg->conn->pcb.udp->recv_arg = NULL;
|
---|
1167 | udp_remove(msg->conn->pcb.udp);
|
---|
1168 | break;
|
---|
1169 | #endif /* LWIP_UDP */
|
---|
1170 | #if LWIP_TCP
|
---|
1171 | case NETCONN_TCP:
|
---|
1172 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL);
|
---|
1173 | msg->conn->state = NETCONN_CLOSE;
|
---|
1174 | msg->msg.sd.shut = NETCONN_SHUT_RDWR;
|
---|
1175 | msg->conn->current_msg = msg;
|
---|
1176 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1177 | if (lwip_netconn_do_close_internal(msg->conn, 0) != ERR_OK) {
|
---|
1178 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_CLOSE);
|
---|
1179 | UNLOCK_TCPIP_CORE();
|
---|
1180 | sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
|
---|
1181 | LOCK_TCPIP_CORE();
|
---|
1182 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
|
---|
1183 | }
|
---|
1184 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1185 | lwip_netconn_do_close_internal(msg->conn);
|
---|
1186 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1187 | /* API_EVENT is called inside lwip_netconn_do_close_internal, before releasing
|
---|
1188 | the application thread, so we can return at this point! */
|
---|
1189 | return;
|
---|
1190 | #endif /* LWIP_TCP */
|
---|
1191 | default:
|
---|
1192 | break;
|
---|
1193 | }
|
---|
1194 | msg->conn->pcb.tcp = NULL;
|
---|
1195 | }
|
---|
1196 | /* tcp netconns don't come here! */
|
---|
1197 |
|
---|
1198 | /* @todo: this lets select make the socket readable and writable,
|
---|
1199 | which is wrong! errfd instead? */
|
---|
1200 | API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
1201 | API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
1202 | }
|
---|
1203 | if (sys_sem_valid(LWIP_API_MSG_SEM(msg))) {
|
---|
1204 | TCPIP_APIMSG_ACK(msg);
|
---|
1205 | }
|
---|
1206 | }
|
---|
1207 |
|
---|
1208 | /**
|
---|
1209 | * Bind a pcb contained in a netconn
|
---|
1210 | * Called from netconn_bind.
|
---|
1211 | *
|
---|
1212 | * @param m the api_msg pointing to the connection and containing
|
---|
1213 | * the IP address and port to bind to
|
---|
1214 | */
|
---|
1215 | void
|
---|
1216 | lwip_netconn_do_bind(void *m)
|
---|
1217 | {
|
---|
1218 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1219 | err_t err;
|
---|
1220 |
|
---|
1221 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1222 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
1223 | #if LWIP_RAW
|
---|
1224 | case NETCONN_RAW:
|
---|
1225 | err = raw_bind(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr));
|
---|
1226 | break;
|
---|
1227 | #endif /* LWIP_RAW */
|
---|
1228 | #if LWIP_UDP
|
---|
1229 | case NETCONN_UDP:
|
---|
1230 | err = udp_bind(msg->conn->pcb.udp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port);
|
---|
1231 | break;
|
---|
1232 | #endif /* LWIP_UDP */
|
---|
1233 | #if LWIP_TCP
|
---|
1234 | case NETCONN_TCP:
|
---|
1235 | err = tcp_bind(msg->conn->pcb.tcp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port);
|
---|
1236 | break;
|
---|
1237 | #endif /* LWIP_TCP */
|
---|
1238 | default:
|
---|
1239 | err = ERR_VAL;
|
---|
1240 | break;
|
---|
1241 | }
|
---|
1242 | } else {
|
---|
1243 | err = ERR_VAL;
|
---|
1244 | }
|
---|
1245 | msg->err = err;
|
---|
1246 | TCPIP_APIMSG_ACK(msg);
|
---|
1247 | }
|
---|
1248 | /**
|
---|
1249 | * Bind a pcb contained in a netconn to an interface
|
---|
1250 | * Called from netconn_bind_if.
|
---|
1251 | *
|
---|
1252 | * @param m the api_msg pointing to the connection and containing
|
---|
1253 | * the IP address and port to bind to
|
---|
1254 | */
|
---|
1255 | void
|
---|
1256 | lwip_netconn_do_bind_if(void *m)
|
---|
1257 | {
|
---|
1258 | struct netif *netif;
|
---|
1259 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1260 | err_t err;
|
---|
1261 |
|
---|
1262 | netif = netif_get_by_index(msg->msg.bc.if_idx);
|
---|
1263 |
|
---|
1264 | if ((netif != NULL) && (msg->conn->pcb.tcp != NULL)) {
|
---|
1265 | err = ERR_OK;
|
---|
1266 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
1267 | #if LWIP_RAW
|
---|
1268 | case NETCONN_RAW:
|
---|
1269 | raw_bind_netif(msg->conn->pcb.raw, netif);
|
---|
1270 | break;
|
---|
1271 | #endif /* LWIP_RAW */
|
---|
1272 | #if LWIP_UDP
|
---|
1273 | case NETCONN_UDP:
|
---|
1274 | udp_bind_netif(msg->conn->pcb.udp, netif);
|
---|
1275 | break;
|
---|
1276 | #endif /* LWIP_UDP */
|
---|
1277 | #if LWIP_TCP
|
---|
1278 | case NETCONN_TCP:
|
---|
1279 | tcp_bind_netif(msg->conn->pcb.tcp, netif);
|
---|
1280 | break;
|
---|
1281 | #endif /* LWIP_TCP */
|
---|
1282 | default:
|
---|
1283 | err = ERR_VAL;
|
---|
1284 | break;
|
---|
1285 | }
|
---|
1286 | } else {
|
---|
1287 | err = ERR_VAL;
|
---|
1288 | }
|
---|
1289 | msg->err = err;
|
---|
1290 | TCPIP_APIMSG_ACK(msg);
|
---|
1291 | }
|
---|
1292 |
|
---|
1293 | #if LWIP_TCP
|
---|
1294 | /**
|
---|
1295 | * TCP callback function if a connection (opened by tcp_connect/lwip_netconn_do_connect) has
|
---|
1296 | * been established (or reset by the remote host).
|
---|
1297 | *
|
---|
1298 | * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
|
---|
1299 | */
|
---|
1300 | static err_t
|
---|
1301 | lwip_netconn_do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
|
---|
1302 | {
|
---|
1303 | struct netconn *conn;
|
---|
1304 | int was_blocking;
|
---|
1305 | sys_sem_t *op_completed_sem = NULL;
|
---|
1306 |
|
---|
1307 | LWIP_UNUSED_ARG(pcb);
|
---|
1308 |
|
---|
1309 | conn = (struct netconn *)arg;
|
---|
1310 |
|
---|
1311 | if (conn == NULL) {
|
---|
1312 | return ERR_VAL;
|
---|
1313 | }
|
---|
1314 |
|
---|
1315 | LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT);
|
---|
1316 | LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect",
|
---|
1317 | (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn));
|
---|
1318 |
|
---|
1319 | if (conn->current_msg != NULL) {
|
---|
1320 | conn->current_msg->err = err;
|
---|
1321 | op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg);
|
---|
1322 | }
|
---|
1323 | if ((NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) && (err == ERR_OK)) {
|
---|
1324 | setup_tcp(conn);
|
---|
1325 | }
|
---|
1326 | was_blocking = !IN_NONBLOCKING_CONNECT(conn);
|
---|
1327 | SET_NONBLOCKING_CONNECT(conn, 0);
|
---|
1328 | LWIP_ASSERT("blocking connect state error",
|
---|
1329 | (was_blocking && op_completed_sem != NULL) ||
|
---|
1330 | (!was_blocking && op_completed_sem == NULL));
|
---|
1331 | conn->current_msg = NULL;
|
---|
1332 | conn->state = NETCONN_NONE;
|
---|
1333 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
1334 |
|
---|
1335 | if (was_blocking) {
|
---|
1336 | sys_sem_signal(op_completed_sem);
|
---|
1337 | }
|
---|
1338 | return ERR_OK;
|
---|
1339 | }
|
---|
1340 | #endif /* LWIP_TCP */
|
---|
1341 |
|
---|
1342 | /**
|
---|
1343 | * Connect a pcb contained inside a netconn
|
---|
1344 | * Called from netconn_connect.
|
---|
1345 | *
|
---|
1346 | * @param m the api_msg pointing to the connection and containing
|
---|
1347 | * the IP address and port to connect to
|
---|
1348 | */
|
---|
1349 | void
|
---|
1350 | lwip_netconn_do_connect(void *m)
|
---|
1351 | {
|
---|
1352 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1353 | err_t err;
|
---|
1354 |
|
---|
1355 | if (msg->conn->pcb.tcp == NULL) {
|
---|
1356 | /* This may happen when calling netconn_connect() a second time */
|
---|
1357 | err = ERR_CLSD;
|
---|
1358 | } else {
|
---|
1359 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
1360 | #if LWIP_RAW
|
---|
1361 | case NETCONN_RAW:
|
---|
1362 | err = raw_connect(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr));
|
---|
1363 | break;
|
---|
1364 | #endif /* LWIP_RAW */
|
---|
1365 | #if LWIP_UDP
|
---|
1366 | case NETCONN_UDP:
|
---|
1367 | err = udp_connect(msg->conn->pcb.udp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port);
|
---|
1368 | break;
|
---|
1369 | #endif /* LWIP_UDP */
|
---|
1370 | #if LWIP_TCP
|
---|
1371 | case NETCONN_TCP:
|
---|
1372 | /* Prevent connect while doing any other action. */
|
---|
1373 | if (msg->conn->state == NETCONN_CONNECT) {
|
---|
1374 | err = ERR_ALREADY;
|
---|
1375 | } else if (msg->conn->state != NETCONN_NONE) {
|
---|
1376 | err = ERR_ISCONN;
|
---|
1377 | } else {
|
---|
1378 | setup_tcp(msg->conn);
|
---|
1379 | err = tcp_connect(msg->conn->pcb.tcp, API_EXPR_REF(msg->msg.bc.ipaddr),
|
---|
1380 | msg->msg.bc.port, lwip_netconn_do_connected);
|
---|
1381 | if (err == ERR_OK) {
|
---|
1382 | u8_t non_blocking = netconn_is_nonblocking(msg->conn);
|
---|
1383 | msg->conn->state = NETCONN_CONNECT;
|
---|
1384 | SET_NONBLOCKING_CONNECT(msg->conn, non_blocking);
|
---|
1385 | if (non_blocking) {
|
---|
1386 | err = ERR_INPROGRESS;
|
---|
1387 | } else {
|
---|
1388 | msg->conn->current_msg = msg;
|
---|
1389 | /* sys_sem_signal() is called from lwip_netconn_do_connected (or err_tcp()),
|
---|
1390 | when the connection is established! */
|
---|
1391 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1392 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_CONNECT);
|
---|
1393 | UNLOCK_TCPIP_CORE();
|
---|
1394 | sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
|
---|
1395 | LOCK_TCPIP_CORE();
|
---|
1396 | LWIP_ASSERT("state!", msg->conn->state != NETCONN_CONNECT);
|
---|
1397 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1398 | return;
|
---|
1399 | }
|
---|
1400 | }
|
---|
1401 | }
|
---|
1402 | break;
|
---|
1403 | #endif /* LWIP_TCP */
|
---|
1404 | default:
|
---|
1405 | LWIP_ERROR("Invalid netconn type", 0, do {
|
---|
1406 | err = ERR_VAL;
|
---|
1407 | } while (0));
|
---|
1408 | break;
|
---|
1409 | }
|
---|
1410 | }
|
---|
1411 | msg->err = err;
|
---|
1412 | /* For all other protocols, netconn_connect() calls netconn_apimsg(),
|
---|
1413 | so use TCPIP_APIMSG_ACK() here. */
|
---|
1414 | TCPIP_APIMSG_ACK(msg);
|
---|
1415 | }
|
---|
1416 |
|
---|
1417 | /**
|
---|
1418 | * Disconnect a pcb contained inside a netconn
|
---|
1419 | * Only used for UDP netconns.
|
---|
1420 | * Called from netconn_disconnect.
|
---|
1421 | *
|
---|
1422 | * @param m the api_msg pointing to the connection to disconnect
|
---|
1423 | */
|
---|
1424 | void
|
---|
1425 | lwip_netconn_do_disconnect(void *m)
|
---|
1426 | {
|
---|
1427 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1428 |
|
---|
1429 | #if LWIP_UDP
|
---|
1430 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
|
---|
1431 | udp_disconnect(msg->conn->pcb.udp);
|
---|
1432 | msg->err = ERR_OK;
|
---|
1433 | } else
|
---|
1434 | #endif /* LWIP_UDP */
|
---|
1435 | {
|
---|
1436 | msg->err = ERR_VAL;
|
---|
1437 | }
|
---|
1438 | TCPIP_APIMSG_ACK(msg);
|
---|
1439 | }
|
---|
1440 |
|
---|
1441 | #if LWIP_TCP
|
---|
1442 | /**
|
---|
1443 | * Set a TCP pcb contained in a netconn into listen mode
|
---|
1444 | * Called from netconn_listen.
|
---|
1445 | *
|
---|
1446 | * @param m the api_msg pointing to the connection
|
---|
1447 | */
|
---|
1448 | void
|
---|
1449 | lwip_netconn_do_listen(void *m)
|
---|
1450 | {
|
---|
1451 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1452 | err_t err;
|
---|
1453 |
|
---|
1454 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1455 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
|
---|
1456 | if (msg->conn->state == NETCONN_NONE) {
|
---|
1457 | struct tcp_pcb *lpcb;
|
---|
1458 | if (msg->conn->pcb.tcp->state != CLOSED) {
|
---|
1459 | /* connection is not closed, cannot listen */
|
---|
1460 | err = ERR_VAL;
|
---|
1461 | } else {
|
---|
1462 | u8_t backlog;
|
---|
1463 | #if TCP_LISTEN_BACKLOG
|
---|
1464 | backlog = msg->msg.lb.backlog;
|
---|
1465 | #else /* TCP_LISTEN_BACKLOG */
|
---|
1466 | backlog = TCP_DEFAULT_LISTEN_BACKLOG;
|
---|
1467 | #endif /* TCP_LISTEN_BACKLOG */
|
---|
1468 | #if LWIP_IPV4 && LWIP_IPV6
|
---|
1469 | /* "Socket API like" dual-stack support: If IP to listen to is IP6_ADDR_ANY,
|
---|
1470 | * and NETCONN_FLAG_IPV6_V6ONLY is NOT set, use IP_ANY_TYPE to listen
|
---|
1471 | */
|
---|
1472 | if (ip_addr_cmp(&msg->conn->pcb.ip->local_ip, IP6_ADDR_ANY) &&
|
---|
1473 | (netconn_get_ipv6only(msg->conn) == 0)) {
|
---|
1474 | /* change PCB type to IPADDR_TYPE_ANY */
|
---|
1475 | IP_SET_TYPE_VAL(msg->conn->pcb.tcp->local_ip, IPADDR_TYPE_ANY);
|
---|
1476 | IP_SET_TYPE_VAL(msg->conn->pcb.tcp->remote_ip, IPADDR_TYPE_ANY);
|
---|
1477 | }
|
---|
1478 | #endif /* LWIP_IPV4 && LWIP_IPV6 */
|
---|
1479 |
|
---|
1480 | lpcb = tcp_listen_with_backlog_and_err(msg->conn->pcb.tcp, backlog, &err);
|
---|
1481 |
|
---|
1482 | if (lpcb == NULL) {
|
---|
1483 | /* in this case, the old pcb is still allocated */
|
---|
1484 | } else {
|
---|
1485 | /* delete the recvmbox and allocate the acceptmbox */
|
---|
1486 | if (sys_mbox_valid(&msg->conn->recvmbox)) {
|
---|
1487 | /** @todo: should we drain the recvmbox here? */
|
---|
1488 | sys_mbox_free(&msg->conn->recvmbox);
|
---|
1489 | sys_mbox_set_invalid(&msg->conn->recvmbox);
|
---|
1490 | }
|
---|
1491 | err = ERR_OK;
|
---|
1492 | if (!sys_mbox_valid(&msg->conn->acceptmbox)) {
|
---|
1493 | err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE);
|
---|
1494 | }
|
---|
1495 | if (err == ERR_OK) {
|
---|
1496 | msg->conn->state = NETCONN_LISTEN;
|
---|
1497 | msg->conn->pcb.tcp = lpcb;
|
---|
1498 | tcp_arg(msg->conn->pcb.tcp, msg->conn);
|
---|
1499 | tcp_accept(msg->conn->pcb.tcp, accept_function);
|
---|
1500 | } else {
|
---|
1501 | /* since the old pcb is already deallocated, free lpcb now */
|
---|
1502 | tcp_close(lpcb);
|
---|
1503 | msg->conn->pcb.tcp = NULL;
|
---|
1504 | }
|
---|
1505 | }
|
---|
1506 | }
|
---|
1507 | } else if (msg->conn->state == NETCONN_LISTEN) {
|
---|
1508 | /* already listening, allow updating of the backlog */
|
---|
1509 | err = ERR_OK;
|
---|
1510 | tcp_backlog_set(msg->conn->pcb.tcp, msg->msg.lb.backlog);
|
---|
1511 | } else {
|
---|
1512 | err = ERR_CONN;
|
---|
1513 | }
|
---|
1514 | } else {
|
---|
1515 | err = ERR_ARG;
|
---|
1516 | }
|
---|
1517 | } else {
|
---|
1518 | err = ERR_CONN;
|
---|
1519 | }
|
---|
1520 | msg->err = err;
|
---|
1521 | TCPIP_APIMSG_ACK(msg);
|
---|
1522 | }
|
---|
1523 | #endif /* LWIP_TCP */
|
---|
1524 |
|
---|
1525 | /**
|
---|
1526 | * Send some data on a RAW or UDP pcb contained in a netconn
|
---|
1527 | * Called from netconn_send
|
---|
1528 | *
|
---|
1529 | * @param m the api_msg pointing to the connection
|
---|
1530 | */
|
---|
1531 | void
|
---|
1532 | lwip_netconn_do_send(void *m)
|
---|
1533 | {
|
---|
1534 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1535 |
|
---|
1536 | err_t err = netconn_err(msg->conn);
|
---|
1537 | if (err == ERR_OK) {
|
---|
1538 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1539 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
1540 | #if LWIP_RAW
|
---|
1541 | case NETCONN_RAW:
|
---|
1542 | if (ip_addr_isany(&msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) {
|
---|
1543 | err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
|
---|
1544 | } else {
|
---|
1545 | err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr);
|
---|
1546 | }
|
---|
1547 | break;
|
---|
1548 | #endif
|
---|
1549 | #if LWIP_UDP
|
---|
1550 | case NETCONN_UDP:
|
---|
1551 | #if LWIP_CHECKSUM_ON_COPY
|
---|
1552 | if (ip_addr_isany(&msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) {
|
---|
1553 | err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p,
|
---|
1554 | msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
|
---|
1555 | } else {
|
---|
1556 | err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p,
|
---|
1557 | &msg->msg.b->addr, msg->msg.b->port,
|
---|
1558 | msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
|
---|
1559 | }
|
---|
1560 | #else /* LWIP_CHECKSUM_ON_COPY */
|
---|
1561 | if (ip_addr_isany_val(msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) {
|
---|
1562 | err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
|
---|
1563 | } else {
|
---|
1564 | err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port);
|
---|
1565 | }
|
---|
1566 | #endif /* LWIP_CHECKSUM_ON_COPY */
|
---|
1567 | break;
|
---|
1568 | #endif /* LWIP_UDP */
|
---|
1569 | default:
|
---|
1570 | err = ERR_CONN;
|
---|
1571 | break;
|
---|
1572 | }
|
---|
1573 | } else {
|
---|
1574 | err = ERR_CONN;
|
---|
1575 | }
|
---|
1576 | }
|
---|
1577 | msg->err = err;
|
---|
1578 | TCPIP_APIMSG_ACK(msg);
|
---|
1579 | }
|
---|
1580 |
|
---|
1581 | #if LWIP_TCP
|
---|
1582 | /**
|
---|
1583 | * Indicate data has been received from a TCP pcb contained in a netconn
|
---|
1584 | * Called from netconn_recv
|
---|
1585 | *
|
---|
1586 | * @param m the api_msg pointing to the connection
|
---|
1587 | */
|
---|
1588 | void
|
---|
1589 | lwip_netconn_do_recv(void *m)
|
---|
1590 | {
|
---|
1591 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1592 |
|
---|
1593 | msg->err = ERR_OK;
|
---|
1594 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1595 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
|
---|
1596 | size_t remaining = msg->msg.r.len;
|
---|
1597 | do {
|
---|
1598 | u16_t recved = (u16_t)((remaining > 0xffff) ? 0xffff : remaining);
|
---|
1599 | tcp_recved(msg->conn->pcb.tcp, recved);
|
---|
1600 | remaining -= recved;
|
---|
1601 | } while (remaining != 0);
|
---|
1602 | }
|
---|
1603 | }
|
---|
1604 | TCPIP_APIMSG_ACK(msg);
|
---|
1605 | }
|
---|
1606 |
|
---|
1607 | #if TCP_LISTEN_BACKLOG
|
---|
1608 | /** Indicate that a TCP pcb has been accepted
|
---|
1609 | * Called from netconn_accept
|
---|
1610 | *
|
---|
1611 | * @param m the api_msg pointing to the connection
|
---|
1612 | */
|
---|
1613 | void
|
---|
1614 | lwip_netconn_do_accepted(void *m)
|
---|
1615 | {
|
---|
1616 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1617 |
|
---|
1618 | msg->err = ERR_OK;
|
---|
1619 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1620 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
|
---|
1621 | tcp_backlog_accepted(msg->conn->pcb.tcp);
|
---|
1622 | }
|
---|
1623 | }
|
---|
1624 | TCPIP_APIMSG_ACK(msg);
|
---|
1625 | }
|
---|
1626 | #endif /* TCP_LISTEN_BACKLOG */
|
---|
1627 |
|
---|
1628 | /**
|
---|
1629 | * See if more data needs to be written from a previous call to netconn_write.
|
---|
1630 | * Called initially from lwip_netconn_do_write. If the first call can't send all data
|
---|
1631 | * (because of low memory or empty send-buffer), this function is called again
|
---|
1632 | * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
|
---|
1633 | * blocking application thread (waiting in netconn_write) is released.
|
---|
1634 | *
|
---|
1635 | * @param conn netconn (that is currently in state NETCONN_WRITE) to process
|
---|
1636 | * @return ERR_OK
|
---|
1637 | * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
|
---|
1638 | */
|
---|
1639 | static err_t
|
---|
1640 | lwip_netconn_do_writemore(struct netconn *conn WRITE_DELAYED_PARAM)
|
---|
1641 | {
|
---|
1642 | err_t err;
|
---|
1643 | const void *dataptr;
|
---|
1644 | u16_t len, available;
|
---|
1645 | u8_t write_finished = 0;
|
---|
1646 | size_t diff;
|
---|
1647 | u8_t dontblock;
|
---|
1648 | u8_t apiflags;
|
---|
1649 | u8_t write_more;
|
---|
1650 |
|
---|
1651 | LWIP_ASSERT("conn != NULL", conn != NULL);
|
---|
1652 | LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
|
---|
1653 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
|
---|
1654 | LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
|
---|
1655 | LWIP_ASSERT("conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len",
|
---|
1656 | conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len);
|
---|
1657 | LWIP_ASSERT("conn->current_msg->msg.w.vector_cnt > 0", conn->current_msg->msg.w.vector_cnt > 0);
|
---|
1658 |
|
---|
1659 | apiflags = conn->current_msg->msg.w.apiflags;
|
---|
1660 | dontblock = netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK);
|
---|
1661 |
|
---|
1662 | #if LWIP_SO_SNDTIMEO
|
---|
1663 | if ((conn->send_timeout != 0) &&
|
---|
1664 | ((s32_t)(sys_now() - conn->current_msg->msg.w.time_started) >= conn->send_timeout)) {
|
---|
1665 | write_finished = 1;
|
---|
1666 | if (conn->current_msg->msg.w.offset == 0) {
|
---|
1667 | /* nothing has been written */
|
---|
1668 | err = ERR_WOULDBLOCK;
|
---|
1669 | } else {
|
---|
1670 | /* partial write */
|
---|
1671 | err = ERR_OK;
|
---|
1672 | }
|
---|
1673 | } else
|
---|
1674 | #endif /* LWIP_SO_SNDTIMEO */
|
---|
1675 | {
|
---|
1676 | do {
|
---|
1677 | dataptr = (const u8_t *)conn->current_msg->msg.w.vector->ptr + conn->current_msg->msg.w.vector_off;
|
---|
1678 | diff = conn->current_msg->msg.w.vector->len - conn->current_msg->msg.w.vector_off;
|
---|
1679 | if (diff > 0xffffUL) { /* max_u16_t */
|
---|
1680 | len = 0xffff;
|
---|
1681 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
1682 | } else {
|
---|
1683 | len = (u16_t)diff;
|
---|
1684 | }
|
---|
1685 | available = tcp_sndbuf(conn->pcb.tcp);
|
---|
1686 | if (available < len) {
|
---|
1687 | /* don't try to write more than sendbuf */
|
---|
1688 | len = available;
|
---|
1689 | if (dontblock) {
|
---|
1690 | if (!len) {
|
---|
1691 | /* set error according to partial write or not */
|
---|
1692 | err = (conn->current_msg->msg.w.offset == 0) ? ERR_WOULDBLOCK : ERR_OK;
|
---|
1693 | goto err_mem;
|
---|
1694 | }
|
---|
1695 | } else {
|
---|
1696 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
1697 | }
|
---|
1698 | }
|
---|
1699 | LWIP_ASSERT("lwip_netconn_do_writemore: invalid length!",
|
---|
1700 | ((conn->current_msg->msg.w.vector_off + len) <= conn->current_msg->msg.w.vector->len));
|
---|
1701 | /* we should loop around for more sending in the following cases:
|
---|
1702 | 1) We couldn't finish the current vector because of 16-bit size limitations.
|
---|
1703 | tcp_write() and tcp_sndbuf() both are limited to 16-bit sizes
|
---|
1704 | 2) We are sending the remainder of the current vector and have more */
|
---|
1705 | if ((len == 0xffff && diff > 0xffffUL) ||
|
---|
1706 | (len == (u16_t)diff && conn->current_msg->msg.w.vector_cnt > 1)) {
|
---|
1707 | write_more = 1;
|
---|
1708 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
1709 | } else {
|
---|
1710 | write_more = 0;
|
---|
1711 | }
|
---|
1712 | err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags);
|
---|
1713 | if (err == ERR_OK) {
|
---|
1714 | conn->current_msg->msg.w.offset += len;
|
---|
1715 | conn->current_msg->msg.w.vector_off += len;
|
---|
1716 | /* check if current vector is finished */
|
---|
1717 | if (conn->current_msg->msg.w.vector_off == conn->current_msg->msg.w.vector->len) {
|
---|
1718 | conn->current_msg->msg.w.vector_cnt--;
|
---|
1719 | /* if we have additional vectors, move on to them */
|
---|
1720 | if (conn->current_msg->msg.w.vector_cnt > 0) {
|
---|
1721 | conn->current_msg->msg.w.vector++;
|
---|
1722 | conn->current_msg->msg.w.vector_off = 0;
|
---|
1723 | }
|
---|
1724 | }
|
---|
1725 | }
|
---|
1726 | } while (write_more && err == ERR_OK);
|
---|
1727 | /* if OK or memory error, check available space */
|
---|
1728 | if ((err == ERR_OK) || (err == ERR_MEM)) {
|
---|
1729 | err_mem:
|
---|
1730 | if (dontblock && (conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len)) {
|
---|
1731 | /* non-blocking write did not write everything: mark the pcb non-writable
|
---|
1732 | and let poll_tcp check writable space to mark the pcb writable again */
|
---|
1733 | API_EVENT(conn, NETCONN_EVT_SENDMINUS, 0);
|
---|
1734 | conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE;
|
---|
1735 | } else if ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) ||
|
---|
1736 | (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT)) {
|
---|
1737 | /* The queued byte- or pbuf-count exceeds the configured low-water limit,
|
---|
1738 | let select mark this pcb as non-writable. */
|
---|
1739 | API_EVENT(conn, NETCONN_EVT_SENDMINUS, 0);
|
---|
1740 | }
|
---|
1741 | }
|
---|
1742 |
|
---|
1743 | if (err == ERR_OK) {
|
---|
1744 | err_t out_err;
|
---|
1745 | if ((conn->current_msg->msg.w.offset == conn->current_msg->msg.w.len) || dontblock) {
|
---|
1746 | /* return sent length (caller reads length from msg.w.offset) */
|
---|
1747 | write_finished = 1;
|
---|
1748 | }
|
---|
1749 | out_err = tcp_output(conn->pcb.tcp);
|
---|
1750 | if (out_err == ERR_RTE) {
|
---|
1751 | /* If tcp_output fails because no route is found,
|
---|
1752 | don't try writing any more but return the error
|
---|
1753 | to the application thread. */
|
---|
1754 | err = out_err;
|
---|
1755 | write_finished = 1;
|
---|
1756 | }
|
---|
1757 | } else if (err == ERR_MEM) {
|
---|
1758 | /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called.
|
---|
1759 | For blocking sockets, we do NOT return to the application
|
---|
1760 | thread, since ERR_MEM is only a temporary error! Non-blocking
|
---|
1761 | will remain non-writable until sent_tcp/poll_tcp is called */
|
---|
1762 |
|
---|
1763 | /* tcp_write returned ERR_MEM, try tcp_output anyway */
|
---|
1764 | err_t out_err = tcp_output(conn->pcb.tcp);
|
---|
1765 | if (out_err == ERR_RTE) {
|
---|
1766 | /* If tcp_output fails because no route is found,
|
---|
1767 | don't try writing any more but return the error
|
---|
1768 | to the application thread. */
|
---|
1769 | err = out_err;
|
---|
1770 | write_finished = 1;
|
---|
1771 | } else if (dontblock) {
|
---|
1772 | /* non-blocking write is done on ERR_MEM, set error according
|
---|
1773 | to partial write or not */
|
---|
1774 | err = (conn->current_msg->msg.w.offset == 0) ? ERR_WOULDBLOCK : ERR_OK;
|
---|
1775 | write_finished = 1;
|
---|
1776 | }
|
---|
1777 | } else {
|
---|
1778 | /* On errors != ERR_MEM, we don't try writing any more but return
|
---|
1779 | the error to the application thread. */
|
---|
1780 | write_finished = 1;
|
---|
1781 | }
|
---|
1782 | }
|
---|
1783 | if (write_finished) {
|
---|
1784 | /* everything was written: set back connection state
|
---|
1785 | and back to application task */
|
---|
1786 | sys_sem_t *op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg);
|
---|
1787 | conn->current_msg->err = err;
|
---|
1788 | conn->current_msg = NULL;
|
---|
1789 | conn->state = NETCONN_NONE;
|
---|
1790 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1791 | if (delayed)
|
---|
1792 | #endif
|
---|
1793 | {
|
---|
1794 | sys_sem_signal(op_completed_sem);
|
---|
1795 | }
|
---|
1796 | }
|
---|
1797 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1798 | else {
|
---|
1799 | return ERR_MEM;
|
---|
1800 | }
|
---|
1801 | #endif
|
---|
1802 | return ERR_OK;
|
---|
1803 | }
|
---|
1804 | #endif /* LWIP_TCP */
|
---|
1805 |
|
---|
1806 | /**
|
---|
1807 | * Send some data on a TCP pcb contained in a netconn
|
---|
1808 | * Called from netconn_write
|
---|
1809 | *
|
---|
1810 | * @param m the api_msg pointing to the connection
|
---|
1811 | */
|
---|
1812 | void
|
---|
1813 | lwip_netconn_do_write(void *m)
|
---|
1814 | {
|
---|
1815 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1816 |
|
---|
1817 | err_t err = netconn_err(msg->conn);
|
---|
1818 | if (err == ERR_OK) {
|
---|
1819 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
|
---|
1820 | #if LWIP_TCP
|
---|
1821 | if (msg->conn->state != NETCONN_NONE) {
|
---|
1822 | /* netconn is connecting, closing or in blocking write */
|
---|
1823 | err = ERR_INPROGRESS;
|
---|
1824 | } else if (msg->conn->pcb.tcp != NULL) {
|
---|
1825 | msg->conn->state = NETCONN_WRITE;
|
---|
1826 | /* set all the variables used by lwip_netconn_do_writemore */
|
---|
1827 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL);
|
---|
1828 | LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0);
|
---|
1829 | msg->conn->current_msg = msg;
|
---|
1830 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1831 | if (lwip_netconn_do_writemore(msg->conn, 0) != ERR_OK) {
|
---|
1832 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
|
---|
1833 | UNLOCK_TCPIP_CORE();
|
---|
1834 | sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
|
---|
1835 | LOCK_TCPIP_CORE();
|
---|
1836 | LWIP_ASSERT("state!", msg->conn->state != NETCONN_WRITE);
|
---|
1837 | }
|
---|
1838 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1839 | lwip_netconn_do_writemore(msg->conn);
|
---|
1840 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1841 | /* for both cases: if lwip_netconn_do_writemore was called, don't ACK the APIMSG
|
---|
1842 | since lwip_netconn_do_writemore ACKs it! */
|
---|
1843 | return;
|
---|
1844 | } else {
|
---|
1845 | err = ERR_CONN;
|
---|
1846 | }
|
---|
1847 | #else /* LWIP_TCP */
|
---|
1848 | err = ERR_VAL;
|
---|
1849 | #endif /* LWIP_TCP */
|
---|
1850 | #if (LWIP_UDP || LWIP_RAW)
|
---|
1851 | } else {
|
---|
1852 | err = ERR_VAL;
|
---|
1853 | #endif /* (LWIP_UDP || LWIP_RAW) */
|
---|
1854 | }
|
---|
1855 | }
|
---|
1856 | msg->err = err;
|
---|
1857 | TCPIP_APIMSG_ACK(msg);
|
---|
1858 | }
|
---|
1859 |
|
---|
1860 | /**
|
---|
1861 | * Return a connection's local or remote address
|
---|
1862 | * Called from netconn_getaddr
|
---|
1863 | *
|
---|
1864 | * @param m the api_msg pointing to the connection
|
---|
1865 | */
|
---|
1866 | void
|
---|
1867 | lwip_netconn_do_getaddr(void *m)
|
---|
1868 | {
|
---|
1869 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1870 |
|
---|
1871 | if (msg->conn->pcb.ip != NULL) {
|
---|
1872 | if (msg->msg.ad.local) {
|
---|
1873 | ip_addr_copy(API_EXPR_DEREF(msg->msg.ad.ipaddr),
|
---|
1874 | msg->conn->pcb.ip->local_ip);
|
---|
1875 | } else {
|
---|
1876 | ip_addr_copy(API_EXPR_DEREF(msg->msg.ad.ipaddr),
|
---|
1877 | msg->conn->pcb.ip->remote_ip);
|
---|
1878 | }
|
---|
1879 |
|
---|
1880 | msg->err = ERR_OK;
|
---|
1881 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
1882 | #if LWIP_RAW
|
---|
1883 | case NETCONN_RAW:
|
---|
1884 | if (msg->msg.ad.local) {
|
---|
1885 | API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
|
---|
1886 | } else {
|
---|
1887 | /* return an error as connecting is only a helper for upper layers */
|
---|
1888 | msg->err = ERR_CONN;
|
---|
1889 | }
|
---|
1890 | break;
|
---|
1891 | #endif /* LWIP_RAW */
|
---|
1892 | #if LWIP_UDP
|
---|
1893 | case NETCONN_UDP:
|
---|
1894 | if (msg->msg.ad.local) {
|
---|
1895 | API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
|
---|
1896 | } else {
|
---|
1897 | if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
|
---|
1898 | msg->err = ERR_CONN;
|
---|
1899 | } else {
|
---|
1900 | API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
|
---|
1901 | }
|
---|
1902 | }
|
---|
1903 | break;
|
---|
1904 | #endif /* LWIP_UDP */
|
---|
1905 | #if LWIP_TCP
|
---|
1906 | case NETCONN_TCP:
|
---|
1907 | if ((msg->msg.ad.local == 0) &&
|
---|
1908 | ((msg->conn->pcb.tcp->state == CLOSED) || (msg->conn->pcb.tcp->state == LISTEN))) {
|
---|
1909 | /* pcb is not connected and remote name is requested */
|
---|
1910 | msg->err = ERR_CONN;
|
---|
1911 | } else {
|
---|
1912 | API_EXPR_DEREF(msg->msg.ad.port) = (msg->msg.ad.local ? msg->conn->pcb.tcp->local_port : msg->conn->pcb.tcp->remote_port);
|
---|
1913 | }
|
---|
1914 | break;
|
---|
1915 | #endif /* LWIP_TCP */
|
---|
1916 | default:
|
---|
1917 | LWIP_ASSERT("invalid netconn_type", 0);
|
---|
1918 | break;
|
---|
1919 | }
|
---|
1920 | } else {
|
---|
1921 | msg->err = ERR_CONN;
|
---|
1922 | }
|
---|
1923 | TCPIP_APIMSG_ACK(msg);
|
---|
1924 | }
|
---|
1925 |
|
---|
1926 | /**
|
---|
1927 | * Close or half-shutdown a TCP pcb contained in a netconn
|
---|
1928 | * Called from netconn_close
|
---|
1929 | * In contrast to closing sockets, the netconn is not deallocated.
|
---|
1930 | *
|
---|
1931 | * @param m the api_msg pointing to the connection
|
---|
1932 | */
|
---|
1933 | void
|
---|
1934 | lwip_netconn_do_close(void *m)
|
---|
1935 | {
|
---|
1936 | struct api_msg *msg = (struct api_msg *)m;
|
---|
1937 |
|
---|
1938 | #if LWIP_TCP
|
---|
1939 | enum netconn_state state = msg->conn->state;
|
---|
1940 | /* First check if this is a TCP netconn and if it is in a correct state
|
---|
1941 | (LISTEN doesn't support half shutdown) */
|
---|
1942 | if ((msg->conn->pcb.tcp != NULL) &&
|
---|
1943 | (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) &&
|
---|
1944 | ((msg->msg.sd.shut == NETCONN_SHUT_RDWR) || (state != NETCONN_LISTEN))) {
|
---|
1945 | /* Check if we are in a connected state */
|
---|
1946 | if (state == NETCONN_CONNECT) {
|
---|
1947 | /* TCP connect in progress: cannot shutdown */
|
---|
1948 | msg->err = ERR_CONN;
|
---|
1949 | } else if (state == NETCONN_WRITE) {
|
---|
1950 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
1951 | if (msg->msg.sd.shut & NETCONN_SHUT_WR) {
|
---|
1952 | /* close requested, abort running write */
|
---|
1953 | sys_sem_t *write_completed_sem;
|
---|
1954 | LWIP_ASSERT("msg->conn->current_msg != NULL", msg->conn->current_msg != NULL);
|
---|
1955 | write_completed_sem = LWIP_API_MSG_SEM(msg->conn->current_msg);
|
---|
1956 | msg->conn->current_msg->err = ERR_CLSD;
|
---|
1957 | msg->conn->current_msg = NULL;
|
---|
1958 | msg->conn->state = NETCONN_NONE;
|
---|
1959 | state = NETCONN_NONE;
|
---|
1960 | sys_sem_signal(write_completed_sem);
|
---|
1961 | } else {
|
---|
1962 | LWIP_ASSERT("msg->msg.sd.shut == NETCONN_SHUT_RD", msg->msg.sd.shut == NETCONN_SHUT_RD);
|
---|
1963 | /* In this case, let the write continue and do not interfere with
|
---|
1964 | conn->current_msg or conn->state! */
|
---|
1965 | msg->err = tcp_shutdown(msg->conn->pcb.tcp, 1, 0);
|
---|
1966 | }
|
---|
1967 | }
|
---|
1968 | if (state == NETCONN_NONE) {
|
---|
1969 | #else /* LWIP_NETCONN_FULLDUPLEX */
|
---|
1970 | msg->err = ERR_INPROGRESS;
|
---|
1971 | } else {
|
---|
1972 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
1973 | if (msg->msg.sd.shut & NETCONN_SHUT_RD) {
|
---|
1974 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
1975 | /* Mark mboxes invalid */
|
---|
1976 | netconn_mark_mbox_invalid(msg->conn);
|
---|
1977 | #else /* LWIP_NETCONN_FULLDUPLEX */
|
---|
1978 | netconn_drain(msg->conn);
|
---|
1979 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
1980 | }
|
---|
1981 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL);
|
---|
1982 | msg->conn->state = NETCONN_CLOSE;
|
---|
1983 | msg->conn->current_msg = msg;
|
---|
1984 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1985 | if (lwip_netconn_do_close_internal(msg->conn, 0) != ERR_OK) {
|
---|
1986 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_CLOSE);
|
---|
1987 | UNLOCK_TCPIP_CORE();
|
---|
1988 | sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
|
---|
1989 | LOCK_TCPIP_CORE();
|
---|
1990 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
|
---|
1991 | }
|
---|
1992 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1993 | lwip_netconn_do_close_internal(msg->conn);
|
---|
1994 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1995 | /* for tcp netconns, lwip_netconn_do_close_internal ACKs the message */
|
---|
1996 | return;
|
---|
1997 | }
|
---|
1998 | } else
|
---|
1999 | #endif /* LWIP_TCP */
|
---|
2000 | {
|
---|
2001 | msg->err = ERR_CONN;
|
---|
2002 | }
|
---|
2003 | TCPIP_APIMSG_ACK(msg);
|
---|
2004 | }
|
---|
2005 |
|
---|
2006 | #if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
|
---|
2007 | /**
|
---|
2008 | * Join multicast groups for UDP netconns.
|
---|
2009 | * Called from netconn_join_leave_group
|
---|
2010 | *
|
---|
2011 | * @param m the api_msg pointing to the connection
|
---|
2012 | */
|
---|
2013 | void
|
---|
2014 | lwip_netconn_do_join_leave_group(void *m)
|
---|
2015 | {
|
---|
2016 | struct api_msg *msg = (struct api_msg *)m;
|
---|
2017 |
|
---|
2018 | msg->err = ERR_CONN;
|
---|
2019 | if (msg->conn->pcb.tcp != NULL) {
|
---|
2020 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
|
---|
2021 | #if LWIP_UDP
|
---|
2022 | #if LWIP_IPV6 && LWIP_IPV6_MLD
|
---|
2023 | if (NETCONNTYPE_ISIPV6(msg->conn->type)) {
|
---|
2024 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
2025 | msg->err = mld6_joingroup(ip_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)),
|
---|
2026 | ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
2027 | } else {
|
---|
2028 | msg->err = mld6_leavegroup(ip_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)),
|
---|
2029 | ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
2030 | }
|
---|
2031 | } else
|
---|
2032 | #endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
|
---|
2033 | {
|
---|
2034 | #if LWIP_IGMP
|
---|
2035 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
2036 | msg->err = igmp_joingroup(ip_2_ip4(API_EXPR_REF(msg->msg.jl.netif_addr)),
|
---|
2037 | ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
2038 | } else {
|
---|
2039 | msg->err = igmp_leavegroup(ip_2_ip4(API_EXPR_REF(msg->msg.jl.netif_addr)),
|
---|
2040 | ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
2041 | }
|
---|
2042 | #endif /* LWIP_IGMP */
|
---|
2043 | }
|
---|
2044 | #endif /* LWIP_UDP */
|
---|
2045 | #if (LWIP_TCP || LWIP_RAW)
|
---|
2046 | } else {
|
---|
2047 | msg->err = ERR_VAL;
|
---|
2048 | #endif /* (LWIP_TCP || LWIP_RAW) */
|
---|
2049 | }
|
---|
2050 | }
|
---|
2051 | TCPIP_APIMSG_ACK(msg);
|
---|
2052 | }
|
---|
2053 | /**
|
---|
2054 | * Join multicast groups for UDP netconns.
|
---|
2055 | * Called from netconn_join_leave_group_netif
|
---|
2056 | *
|
---|
2057 | * @param m the api_msg pointing to the connection
|
---|
2058 | */
|
---|
2059 | void
|
---|
2060 | lwip_netconn_do_join_leave_group_netif(void *m)
|
---|
2061 | {
|
---|
2062 | struct api_msg *msg = (struct api_msg *)m;
|
---|
2063 | struct netif *netif;
|
---|
2064 |
|
---|
2065 | netif = netif_get_by_index(msg->msg.jl.if_idx);
|
---|
2066 | if (netif == NULL) {
|
---|
2067 | msg->err = ERR_IF;
|
---|
2068 | goto done;
|
---|
2069 | }
|
---|
2070 |
|
---|
2071 | msg->err = ERR_CONN;
|
---|
2072 | if (msg->conn->pcb.tcp != NULL) {
|
---|
2073 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
|
---|
2074 | #if LWIP_UDP
|
---|
2075 | #if LWIP_IPV6 && LWIP_IPV6_MLD
|
---|
2076 | if (NETCONNTYPE_ISIPV6(msg->conn->type)) {
|
---|
2077 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
2078 | msg->err = mld6_joingroup_netif(netif,
|
---|
2079 | ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
2080 | } else {
|
---|
2081 | msg->err = mld6_leavegroup_netif(netif,
|
---|
2082 | ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
2083 | }
|
---|
2084 | } else
|
---|
2085 | #endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
|
---|
2086 | {
|
---|
2087 | #if LWIP_IGMP
|
---|
2088 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
2089 | msg->err = igmp_joingroup_netif(netif,
|
---|
2090 | ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
2091 | } else {
|
---|
2092 | msg->err = igmp_leavegroup_netif(netif,
|
---|
2093 | ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
2094 | }
|
---|
2095 | #endif /* LWIP_IGMP */
|
---|
2096 | }
|
---|
2097 | #endif /* LWIP_UDP */
|
---|
2098 | #if (LWIP_TCP || LWIP_RAW)
|
---|
2099 | } else {
|
---|
2100 | msg->err = ERR_VAL;
|
---|
2101 | #endif /* (LWIP_TCP || LWIP_RAW) */
|
---|
2102 | }
|
---|
2103 | }
|
---|
2104 |
|
---|
2105 | done:
|
---|
2106 | TCPIP_APIMSG_ACK(msg);
|
---|
2107 | }
|
---|
2108 | #endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
|
---|
2109 |
|
---|
2110 | #if LWIP_DNS
|
---|
2111 | /**
|
---|
2112 | * Callback function that is called when DNS name is resolved
|
---|
2113 | * (or on timeout). A waiting application thread is waked up by
|
---|
2114 | * signaling the semaphore.
|
---|
2115 | */
|
---|
2116 | static void
|
---|
2117 | lwip_netconn_do_dns_found(const char *name, const ip_addr_t *ipaddr, void *arg)
|
---|
2118 | {
|
---|
2119 | struct dns_api_msg *msg = (struct dns_api_msg *)arg;
|
---|
2120 |
|
---|
2121 | /* we trust the internal implementation to be correct :-) */
|
---|
2122 | LWIP_UNUSED_ARG(name);
|
---|
2123 |
|
---|
2124 | if (ipaddr == NULL) {
|
---|
2125 | /* timeout or memory error */
|
---|
2126 | API_EXPR_DEREF(msg->err) = ERR_VAL;
|
---|
2127 | } else {
|
---|
2128 | /* address was resolved */
|
---|
2129 | API_EXPR_DEREF(msg->err) = ERR_OK;
|
---|
2130 | API_EXPR_DEREF(msg->addr) = *ipaddr;
|
---|
2131 | }
|
---|
2132 | /* wake up the application task waiting in netconn_gethostbyname */
|
---|
2133 | sys_sem_signal(API_EXPR_REF_SEM(msg->sem));
|
---|
2134 | }
|
---|
2135 |
|
---|
2136 | /**
|
---|
2137 | * Execute a DNS query
|
---|
2138 | * Called from netconn_gethostbyname
|
---|
2139 | *
|
---|
2140 | * @param arg the dns_api_msg pointing to the query
|
---|
2141 | */
|
---|
2142 | void
|
---|
2143 | lwip_netconn_do_gethostbyname(void *arg)
|
---|
2144 | {
|
---|
2145 | struct dns_api_msg *msg = (struct dns_api_msg *)arg;
|
---|
2146 | u8_t addrtype =
|
---|
2147 | #if LWIP_IPV4 && LWIP_IPV6
|
---|
2148 | msg->dns_addrtype;
|
---|
2149 | #else
|
---|
2150 | LWIP_DNS_ADDRTYPE_DEFAULT;
|
---|
2151 | #endif
|
---|
2152 |
|
---|
2153 | API_EXPR_DEREF(msg->err) = dns_gethostbyname_addrtype(msg->name,
|
---|
2154 | API_EXPR_REF(msg->addr), lwip_netconn_do_dns_found, msg, addrtype);
|
---|
2155 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
2156 | /* For core locking, only block if we need to wait for answer/timeout */
|
---|
2157 | if (API_EXPR_DEREF(msg->err) == ERR_INPROGRESS) {
|
---|
2158 | UNLOCK_TCPIP_CORE();
|
---|
2159 | sys_sem_wait(API_EXPR_REF_SEM(msg->sem));
|
---|
2160 | LOCK_TCPIP_CORE();
|
---|
2161 | LWIP_ASSERT("do_gethostbyname still in progress!!", API_EXPR_DEREF(msg->err) != ERR_INPROGRESS);
|
---|
2162 | }
|
---|
2163 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
2164 | if (API_EXPR_DEREF(msg->err) != ERR_INPROGRESS) {
|
---|
2165 | /* on error or immediate success, wake up the application
|
---|
2166 | * task waiting in netconn_gethostbyname */
|
---|
2167 | sys_sem_signal(API_EXPR_REF_SEM(msg->sem));
|
---|
2168 | }
|
---|
2169 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
2170 | }
|
---|
2171 | #endif /* LWIP_DNS */
|
---|
2172 |
|
---|
2173 | #endif /* LWIP_NETCONN */
|
---|