1 | /**
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2 | * @file
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3 | * lwIP netif implementing an IEEE 802.1D MAC Bridge
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4 | */
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5 |
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6 | /*
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7 | * Copyright (c) 2017 Simon Goldschmidt.
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8 | * All rights reserved.
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9 | *
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10 | * Redistribution and use in source and binary forms, with or without modification,
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11 | * are permitted provided that the following conditions are met:
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12 | *
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13 | * 1. Redistributions of source code must retain the above copyright notice,
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14 | * this list of conditions and the following disclaimer.
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15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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16 | * this list of conditions and the following disclaimer in the documentation
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17 | * and/or other materials provided with the distribution.
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18 | * 3. The name of the author may not be used to endorse or promote products
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19 | * derived from this software without specific prior written permission.
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20 | *
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21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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30 | * OF SUCH DAMAGE.
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31 | *
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32 | * This file is part of the lwIP TCP/IP stack.
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33 | *
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34 | * Author: Simon Goldschmidt <goldsimon@gmx.de>
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35 | *
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36 | */
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37 | #ifndef LWIP_HDR_NETIF_BRIDGEIF_H
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38 | #define LWIP_HDR_NETIF_BRIDGEIF_H
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39 |
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40 | #include "netif/bridgeif_opts.h"
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41 |
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42 | #include "lwip/err.h"
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43 | #include "lwip/prot/ethernet.h"
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44 |
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45 | #ifdef __cplusplus
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46 | extern "C" {
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47 | #endif
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48 |
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49 | struct netif;
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50 |
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51 | #if (BRIDGEIF_MAX_PORTS < 0) || (BRIDGEIF_MAX_PORTS >= 64)
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52 | #error BRIDGEIF_MAX_PORTS must be [1..63]
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53 | #elif BRIDGEIF_MAX_PORTS < 8
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54 | typedef u8_t bridgeif_portmask_t;
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55 | #elif BRIDGEIF_MAX_PORTS < 16
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56 | typedef u16_t bridgeif_portmask_t;
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57 | #elif BRIDGEIF_MAX_PORTS < 32
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58 | typedef u32_t bridgeif_portmask_t;
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59 | #elif BRIDGEIF_MAX_PORTS < 64
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60 | typedef u64_t bridgeif_portmask_t;
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61 | #endif
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62 |
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63 | #define BR_FLOOD ((bridgeif_portmask_t)-1)
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64 |
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65 | /** @ingroup bridgeif
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66 | * Initialisation data for @ref bridgeif_init.
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67 | * An instance of this type must be passed as parameter 'state' to @ref netif_add
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68 | * when the bridge is added.
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69 | */
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70 | typedef struct bridgeif_initdata_s {
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71 | /** MAC address of the bridge (cannot use the netif's addresses) */
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72 | struct eth_addr ethaddr;
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73 | /** Maximum number of ports in the bridge (ports are stored in an array, this
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74 | influences memory allocated for netif->state of the bridge netif). */
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75 | u8_t max_ports;
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76 | /** Maximum number of dynamic/learning entries in the bridge's forwarding database.
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77 | In the default implementation, this controls memory consumption only. */
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78 | u16_t max_fdb_dynamic_entries;
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79 | /** Maximum number of static forwarding entries. Influences memory consumption! */
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80 | u16_t max_fdb_static_entries;
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81 | } bridgeif_initdata_t;
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82 |
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83 | /** @ingroup bridgeif
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84 | * Use this for constant initialization of a bridgeif_initdat_t
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85 | * (ethaddr must be passed as ETH_ADDR())
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86 | */
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87 | #define BRIDGEIF_INITDATA1(max_ports, max_fdb_dynamic_entries, max_fdb_static_entries, ethaddr) {ethaddr, max_ports, max_fdb_dynamic_entries, max_fdb_static_entries}
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88 | /** @ingroup bridgeif
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89 | * Use this for constant initialization of a bridgeif_initdat_t
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90 | * (each byte of ethaddr must be passed)
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91 | */
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92 | #define BRIDGEIF_INITDATA2(max_ports, max_fdb_dynamic_entries, max_fdb_static_entries, e0, e1, e2, e3, e4, e5) {{e0, e1, e2, e3, e4, e5}, max_ports, max_fdb_dynamic_entries, max_fdb_static_entries}
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93 |
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94 | err_t bridgeif_init(struct netif *netif);
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95 | err_t bridgeif_add_port(struct netif *bridgeif, struct netif *portif);
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96 | err_t bridgeif_fdb_add(struct netif *bridgeif, const struct eth_addr *addr, bridgeif_portmask_t ports);
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97 | err_t bridgeif_fdb_remove(struct netif *bridgeif, const struct eth_addr *addr);
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98 |
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99 | /* FDB interface, can be replaced by own implementation */
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100 | void bridgeif_fdb_update_src(void *fdb_ptr, struct eth_addr *src_addr, u8_t port_idx);
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101 | bridgeif_portmask_t bridgeif_fdb_get_dst_ports(void *fdb_ptr, struct eth_addr *dst_addr);
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102 | void* bridgeif_fdb_init(u16_t max_fdb_entries);
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103 |
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104 | #if BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT
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105 | #ifndef BRIDGEIF_DECL_PROTECT
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106 | /* define bridgeif protection to sys_arch_protect... */
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107 | #include "lwip/sys.h"
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108 | #define BRIDGEIF_DECL_PROTECT(lev) SYS_ARCH_DECL_PROTECT(lev)
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109 | #define BRIDGEIF_READ_PROTECT(lev) SYS_ARCH_PROTECT(lev)
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110 | #define BRIDGEIF_READ_UNPROTECT(lev) SYS_ARCH_UNPROTECT(lev)
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111 | #define BRIDGEIF_WRITE_PROTECT(lev)
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112 | #define BRIDGEIF_WRITE_UNPROTECT(lev)
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113 | #endif
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114 | #else /* BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT */
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115 | #include "lwip/tcpip.h"
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116 | #define BRIDGEIF_DECL_PROTECT(lev)
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117 | #define BRIDGEIF_READ_PROTECT(lev)
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118 | #define BRIDGEIF_READ_UNPROTECT(lev)
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119 | #define BRIDGEIF_WRITE_PROTECT(lev)
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120 | #define BRIDGEIF_WRITE_UNPROTECT(lev)
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121 | #endif /* BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT */
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122 |
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123 | #ifdef __cplusplus
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124 | }
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125 | #endif
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126 |
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127 | #endif /* LWIP_HDR_NETIF_BRIDGEIF_H */
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