My fork of the HTTPServer (working)
Core/lwIP/core/ipv4/igmp.c@0:7a64fbb4069d, 2012-08-06 (annotated)
- Committer:
- screamer
- Date:
- Mon Aug 06 09:23:14 2012 +0000
- Revision:
- 0:7a64fbb4069d
[mbed] converted /DGWWebServer/HTTPServer
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
screamer | 0:7a64fbb4069d | 1 | /** |
screamer | 0:7a64fbb4069d | 2 | * @file |
screamer | 0:7a64fbb4069d | 3 | * IGMP - Internet Group Management Protocol |
screamer | 0:7a64fbb4069d | 4 | * |
screamer | 0:7a64fbb4069d | 5 | */ |
screamer | 0:7a64fbb4069d | 6 | |
screamer | 0:7a64fbb4069d | 7 | /* |
screamer | 0:7a64fbb4069d | 8 | * Copyright (c) 2002 CITEL Technologies Ltd. |
screamer | 0:7a64fbb4069d | 9 | * All rights reserved. |
screamer | 0:7a64fbb4069d | 10 | * |
screamer | 0:7a64fbb4069d | 11 | * Redistribution and use in source and binary forms, with or without |
screamer | 0:7a64fbb4069d | 12 | * modification, are permitted provided that the following conditions |
screamer | 0:7a64fbb4069d | 13 | * are met: |
screamer | 0:7a64fbb4069d | 14 | * 1. Redistributions of source code must retain the above copyright |
screamer | 0:7a64fbb4069d | 15 | * notice, this list of conditions and the following disclaimer. |
screamer | 0:7a64fbb4069d | 16 | * 2. Redistributions in binary form must reproduce the above copyright |
screamer | 0:7a64fbb4069d | 17 | * notice, this list of conditions and the following disclaimer in the |
screamer | 0:7a64fbb4069d | 18 | * documentation and/or other materials provided with the distribution. |
screamer | 0:7a64fbb4069d | 19 | * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors |
screamer | 0:7a64fbb4069d | 20 | * may be used to endorse or promote products derived from this software |
screamer | 0:7a64fbb4069d | 21 | * without specific prior written permission. |
screamer | 0:7a64fbb4069d | 22 | * |
screamer | 0:7a64fbb4069d | 23 | * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS'' |
screamer | 0:7a64fbb4069d | 24 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
screamer | 0:7a64fbb4069d | 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
screamer | 0:7a64fbb4069d | 26 | * ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE |
screamer | 0:7a64fbb4069d | 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
screamer | 0:7a64fbb4069d | 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
screamer | 0:7a64fbb4069d | 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
screamer | 0:7a64fbb4069d | 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
screamer | 0:7a64fbb4069d | 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
screamer | 0:7a64fbb4069d | 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
screamer | 0:7a64fbb4069d | 33 | * SUCH DAMAGE. |
screamer | 0:7a64fbb4069d | 34 | * |
screamer | 0:7a64fbb4069d | 35 | * This file is a contribution to the lwIP TCP/IP stack. |
screamer | 0:7a64fbb4069d | 36 | * The Swedish Institute of Computer Science and Adam Dunkels |
screamer | 0:7a64fbb4069d | 37 | * are specifically granted permission to redistribute this |
screamer | 0:7a64fbb4069d | 38 | * source code. |
screamer | 0:7a64fbb4069d | 39 | */ |
screamer | 0:7a64fbb4069d | 40 | |
screamer | 0:7a64fbb4069d | 41 | /*------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 42 | Note 1) |
screamer | 0:7a64fbb4069d | 43 | Although the rfc requires V1 AND V2 capability |
screamer | 0:7a64fbb4069d | 44 | we will only support v2 since now V1 is very old (August 1989) |
screamer | 0:7a64fbb4069d | 45 | V1 can be added if required |
screamer | 0:7a64fbb4069d | 46 | |
screamer | 0:7a64fbb4069d | 47 | a debug print and statistic have been implemented to |
screamer | 0:7a64fbb4069d | 48 | show this up. |
screamer | 0:7a64fbb4069d | 49 | ------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 50 | ------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 51 | Note 2) |
screamer | 0:7a64fbb4069d | 52 | A query for a specific group address (as opposed to ALLHOSTS) |
screamer | 0:7a64fbb4069d | 53 | has now been implemented as I am unsure if it is required |
screamer | 0:7a64fbb4069d | 54 | |
screamer | 0:7a64fbb4069d | 55 | a debug print and statistic have been implemented to |
screamer | 0:7a64fbb4069d | 56 | show this up. |
screamer | 0:7a64fbb4069d | 57 | ------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 58 | ------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 59 | Note 3) |
screamer | 0:7a64fbb4069d | 60 | The router alert rfc 2113 is implemented in outgoing packets |
screamer | 0:7a64fbb4069d | 61 | but not checked rigorously incoming |
screamer | 0:7a64fbb4069d | 62 | ------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 63 | Steve Reynolds |
screamer | 0:7a64fbb4069d | 64 | ------------------------------------------------------------*/ |
screamer | 0:7a64fbb4069d | 65 | |
screamer | 0:7a64fbb4069d | 66 | /*----------------------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 67 | * RFC 988 - Host extensions for IP multicasting - V0 |
screamer | 0:7a64fbb4069d | 68 | * RFC 1054 - Host extensions for IP multicasting - |
screamer | 0:7a64fbb4069d | 69 | * RFC 1112 - Host extensions for IP multicasting - V1 |
screamer | 0:7a64fbb4069d | 70 | * RFC 2236 - Internet Group Management Protocol, Version 2 - V2 <- this code is based on this RFC (it's the "de facto" standard) |
screamer | 0:7a64fbb4069d | 71 | * RFC 3376 - Internet Group Management Protocol, Version 3 - V3 |
screamer | 0:7a64fbb4069d | 72 | * RFC 4604 - Using Internet Group Management Protocol Version 3... - V3+ |
screamer | 0:7a64fbb4069d | 73 | * RFC 2113 - IP Router Alert Option - |
screamer | 0:7a64fbb4069d | 74 | *----------------------------------------------------------------------------*/ |
screamer | 0:7a64fbb4069d | 75 | |
screamer | 0:7a64fbb4069d | 76 | /*----------------------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 77 | * Includes |
screamer | 0:7a64fbb4069d | 78 | *----------------------------------------------------------------------------*/ |
screamer | 0:7a64fbb4069d | 79 | |
screamer | 0:7a64fbb4069d | 80 | #include "lwip/opt.h" |
screamer | 0:7a64fbb4069d | 81 | |
screamer | 0:7a64fbb4069d | 82 | #if LWIP_IGMP /* don't build if not configured for use in lwipopts.h */ |
screamer | 0:7a64fbb4069d | 83 | |
screamer | 0:7a64fbb4069d | 84 | #include "lwip/igmp.h" |
screamer | 0:7a64fbb4069d | 85 | #include "lwip/debug.h" |
screamer | 0:7a64fbb4069d | 86 | #include "lwip/def.h" |
screamer | 0:7a64fbb4069d | 87 | #include "lwip/mem.h" |
screamer | 0:7a64fbb4069d | 88 | #include "lwip/ip.h" |
screamer | 0:7a64fbb4069d | 89 | #include "lwip/inet.h" |
screamer | 0:7a64fbb4069d | 90 | #include "lwip/inet_chksum.h" |
screamer | 0:7a64fbb4069d | 91 | #include "lwip/netif.h" |
screamer | 0:7a64fbb4069d | 92 | #include "lwip/icmp.h" |
screamer | 0:7a64fbb4069d | 93 | #include "lwip/udp.h" |
screamer | 0:7a64fbb4069d | 94 | #include "lwip/tcp.h" |
screamer | 0:7a64fbb4069d | 95 | #include "lwip/stats.h" |
screamer | 0:7a64fbb4069d | 96 | |
screamer | 0:7a64fbb4069d | 97 | #include "string.h" |
screamer | 0:7a64fbb4069d | 98 | |
screamer | 0:7a64fbb4069d | 99 | /*----------------------------------------------------------------------------- |
screamer | 0:7a64fbb4069d | 100 | * Globales |
screamer | 0:7a64fbb4069d | 101 | *----------------------------------------------------------------------------*/ |
screamer | 0:7a64fbb4069d | 102 | |
screamer | 0:7a64fbb4069d | 103 | static struct igmp_group* igmp_group_list; |
screamer | 0:7a64fbb4069d | 104 | static struct ip_addr allsystems; |
screamer | 0:7a64fbb4069d | 105 | static struct ip_addr allrouters; |
screamer | 0:7a64fbb4069d | 106 | |
screamer | 0:7a64fbb4069d | 107 | /** |
screamer | 0:7a64fbb4069d | 108 | * Initialize the IGMP module |
screamer | 0:7a64fbb4069d | 109 | */ |
screamer | 0:7a64fbb4069d | 110 | void |
screamer | 0:7a64fbb4069d | 111 | igmp_init(void) |
screamer | 0:7a64fbb4069d | 112 | { |
screamer | 0:7a64fbb4069d | 113 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_init: initializing\n")); |
screamer | 0:7a64fbb4069d | 114 | |
screamer | 0:7a64fbb4069d | 115 | IP4_ADDR(&allsystems, 224, 0, 0, 1); |
screamer | 0:7a64fbb4069d | 116 | IP4_ADDR(&allrouters, 224, 0, 0, 2); |
screamer | 0:7a64fbb4069d | 117 | } |
screamer | 0:7a64fbb4069d | 118 | |
screamer | 0:7a64fbb4069d | 119 | #ifdef LWIP_DEBUG |
screamer | 0:7a64fbb4069d | 120 | /** |
screamer | 0:7a64fbb4069d | 121 | * Dump global IGMP groups list |
screamer | 0:7a64fbb4069d | 122 | */ |
screamer | 0:7a64fbb4069d | 123 | void |
screamer | 0:7a64fbb4069d | 124 | igmp_dump_group_list() |
screamer | 0:7a64fbb4069d | 125 | { |
screamer | 0:7a64fbb4069d | 126 | struct igmp_group *group = igmp_group_list; |
screamer | 0:7a64fbb4069d | 127 | |
screamer | 0:7a64fbb4069d | 128 | while (group != NULL) { |
screamer | 0:7a64fbb4069d | 129 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_dump_group_list: [%"U32_F"] ", (u32_t)(group->group_state))); |
screamer | 0:7a64fbb4069d | 130 | ip_addr_debug_print(IGMP_DEBUG, &group->group_address); |
screamer | 0:7a64fbb4069d | 131 | LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", group->interface)); |
screamer | 0:7a64fbb4069d | 132 | group = group->next; |
screamer | 0:7a64fbb4069d | 133 | } |
screamer | 0:7a64fbb4069d | 134 | LWIP_DEBUGF(IGMP_DEBUG, ("\n")); |
screamer | 0:7a64fbb4069d | 135 | } |
screamer | 0:7a64fbb4069d | 136 | #else |
screamer | 0:7a64fbb4069d | 137 | #define igmp_dump_group_list() |
screamer | 0:7a64fbb4069d | 138 | #endif /* LWIP_DEBUG */ |
screamer | 0:7a64fbb4069d | 139 | |
screamer | 0:7a64fbb4069d | 140 | /** |
screamer | 0:7a64fbb4069d | 141 | * Start IGMP processing on interface |
screamer | 0:7a64fbb4069d | 142 | * |
screamer | 0:7a64fbb4069d | 143 | * @param netif network interface on which start IGMP processing |
screamer | 0:7a64fbb4069d | 144 | */ |
screamer | 0:7a64fbb4069d | 145 | err_t |
screamer | 0:7a64fbb4069d | 146 | igmp_start(struct netif *netif) |
screamer | 0:7a64fbb4069d | 147 | { |
screamer | 0:7a64fbb4069d | 148 | struct igmp_group* group; |
screamer | 0:7a64fbb4069d | 149 | |
screamer | 0:7a64fbb4069d | 150 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_start: starting IGMP processing on if %p\n", netif)); |
screamer | 0:7a64fbb4069d | 151 | |
screamer | 0:7a64fbb4069d | 152 | group = igmp_lookup_group(netif, &allsystems); |
screamer | 0:7a64fbb4069d | 153 | |
screamer | 0:7a64fbb4069d | 154 | if (group != NULL) { |
screamer | 0:7a64fbb4069d | 155 | group->group_state = IGMP_GROUP_IDLE_MEMBER; |
screamer | 0:7a64fbb4069d | 156 | group->use++; |
screamer | 0:7a64fbb4069d | 157 | |
screamer | 0:7a64fbb4069d | 158 | /* Allow the igmp messages at the MAC level */ |
screamer | 0:7a64fbb4069d | 159 | if (netif->igmp_mac_filter != NULL) { |
screamer | 0:7a64fbb4069d | 160 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_start: igmp_mac_filter(ADD ")); |
screamer | 0:7a64fbb4069d | 161 | ip_addr_debug_print(IGMP_DEBUG, &allsystems); |
screamer | 0:7a64fbb4069d | 162 | LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", netif)); |
screamer | 0:7a64fbb4069d | 163 | netif->igmp_mac_filter( netif, &allsystems, IGMP_ADD_MAC_FILTER); |
screamer | 0:7a64fbb4069d | 164 | } |
screamer | 0:7a64fbb4069d | 165 | |
screamer | 0:7a64fbb4069d | 166 | return ERR_OK; |
screamer | 0:7a64fbb4069d | 167 | } |
screamer | 0:7a64fbb4069d | 168 | |
screamer | 0:7a64fbb4069d | 169 | return ERR_MEM; |
screamer | 0:7a64fbb4069d | 170 | } |
screamer | 0:7a64fbb4069d | 171 | |
screamer | 0:7a64fbb4069d | 172 | /** |
screamer | 0:7a64fbb4069d | 173 | * Stop IGMP processing on interface |
screamer | 0:7a64fbb4069d | 174 | * |
screamer | 0:7a64fbb4069d | 175 | * @param netif network interface on which stop IGMP processing |
screamer | 0:7a64fbb4069d | 176 | */ |
screamer | 0:7a64fbb4069d | 177 | err_t |
screamer | 0:7a64fbb4069d | 178 | igmp_stop(struct netif *netif) |
screamer | 0:7a64fbb4069d | 179 | { |
screamer | 0:7a64fbb4069d | 180 | struct igmp_group *group = igmp_group_list; |
screamer | 0:7a64fbb4069d | 181 | struct igmp_group *prev = NULL; |
screamer | 0:7a64fbb4069d | 182 | struct igmp_group *next; |
screamer | 0:7a64fbb4069d | 183 | |
screamer | 0:7a64fbb4069d | 184 | /* look for groups joined on this interface further down the list */ |
screamer | 0:7a64fbb4069d | 185 | while (group != NULL) { |
screamer | 0:7a64fbb4069d | 186 | next = group->next; |
screamer | 0:7a64fbb4069d | 187 | /* is it a group joined on this interface? */ |
screamer | 0:7a64fbb4069d | 188 | if (group->interface == netif) { |
screamer | 0:7a64fbb4069d | 189 | /* is it the first group of the list? */ |
screamer | 0:7a64fbb4069d | 190 | if (group == igmp_group_list) { |
screamer | 0:7a64fbb4069d | 191 | igmp_group_list = next; |
screamer | 0:7a64fbb4069d | 192 | } |
screamer | 0:7a64fbb4069d | 193 | /* is there a "previous" group defined? */ |
screamer | 0:7a64fbb4069d | 194 | if (prev != NULL) { |
screamer | 0:7a64fbb4069d | 195 | prev->next = next; |
screamer | 0:7a64fbb4069d | 196 | } |
screamer | 0:7a64fbb4069d | 197 | /* disable the group at the MAC level */ |
screamer | 0:7a64fbb4069d | 198 | if (netif->igmp_mac_filter != NULL) { |
screamer | 0:7a64fbb4069d | 199 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_stop: igmp_mac_filter(DEL ")); |
screamer | 0:7a64fbb4069d | 200 | ip_addr_debug_print(IGMP_DEBUG, &group->group_address); |
screamer | 0:7a64fbb4069d | 201 | LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", netif)); |
screamer | 0:7a64fbb4069d | 202 | netif->igmp_mac_filter(netif, &(group->group_address), IGMP_DEL_MAC_FILTER); |
screamer | 0:7a64fbb4069d | 203 | } |
screamer | 0:7a64fbb4069d | 204 | /* free group */ |
screamer | 0:7a64fbb4069d | 205 | memp_free(MEMP_IGMP_GROUP, group); |
screamer | 0:7a64fbb4069d | 206 | } else { |
screamer | 0:7a64fbb4069d | 207 | /* change the "previous" */ |
screamer | 0:7a64fbb4069d | 208 | prev = group; |
screamer | 0:7a64fbb4069d | 209 | } |
screamer | 0:7a64fbb4069d | 210 | /* move to "next" */ |
screamer | 0:7a64fbb4069d | 211 | group = next; |
screamer | 0:7a64fbb4069d | 212 | } |
screamer | 0:7a64fbb4069d | 213 | return ERR_OK; |
screamer | 0:7a64fbb4069d | 214 | } |
screamer | 0:7a64fbb4069d | 215 | |
screamer | 0:7a64fbb4069d | 216 | /** |
screamer | 0:7a64fbb4069d | 217 | * Report IGMP memberships for this interface |
screamer | 0:7a64fbb4069d | 218 | * |
screamer | 0:7a64fbb4069d | 219 | * @param netif network interface on which report IGMP memberships |
screamer | 0:7a64fbb4069d | 220 | */ |
screamer | 0:7a64fbb4069d | 221 | void |
screamer | 0:7a64fbb4069d | 222 | igmp_report_groups( struct netif *netif) |
screamer | 0:7a64fbb4069d | 223 | { |
screamer | 0:7a64fbb4069d | 224 | struct igmp_group *group = igmp_group_list; |
screamer | 0:7a64fbb4069d | 225 | |
screamer | 0:7a64fbb4069d | 226 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_report_groups: sending IGMP reports on if %p\n", netif)); |
screamer | 0:7a64fbb4069d | 227 | |
screamer | 0:7a64fbb4069d | 228 | while (group != NULL) { |
screamer | 0:7a64fbb4069d | 229 | if (group->interface == netif) { |
screamer | 0:7a64fbb4069d | 230 | igmp_delaying_member( group, IGMP_JOIN_DELAYING_MEMBER_TMR); |
screamer | 0:7a64fbb4069d | 231 | } |
screamer | 0:7a64fbb4069d | 232 | group = group->next; |
screamer | 0:7a64fbb4069d | 233 | } |
screamer | 0:7a64fbb4069d | 234 | } |
screamer | 0:7a64fbb4069d | 235 | |
screamer | 0:7a64fbb4069d | 236 | /** |
screamer | 0:7a64fbb4069d | 237 | * Search for a group in the global igmp_group_list |
screamer | 0:7a64fbb4069d | 238 | * |
screamer | 0:7a64fbb4069d | 239 | * @param ifp the network interface for which to look |
screamer | 0:7a64fbb4069d | 240 | * @param addr the group ip address to search for |
screamer | 0:7a64fbb4069d | 241 | * @return a struct igmp_group* if the group has been found, |
screamer | 0:7a64fbb4069d | 242 | * NULL if the group wasn't found. |
screamer | 0:7a64fbb4069d | 243 | */ |
screamer | 0:7a64fbb4069d | 244 | struct igmp_group * |
screamer | 0:7a64fbb4069d | 245 | igmp_lookfor_group(struct netif *ifp, struct ip_addr *addr) |
screamer | 0:7a64fbb4069d | 246 | { |
screamer | 0:7a64fbb4069d | 247 | struct igmp_group *group = igmp_group_list; |
screamer | 0:7a64fbb4069d | 248 | |
screamer | 0:7a64fbb4069d | 249 | while (group != NULL) { |
screamer | 0:7a64fbb4069d | 250 | if ((group->interface == ifp) && (ip_addr_cmp(&(group->group_address), addr))) { |
screamer | 0:7a64fbb4069d | 251 | return group; |
screamer | 0:7a64fbb4069d | 252 | } |
screamer | 0:7a64fbb4069d | 253 | group = group->next; |
screamer | 0:7a64fbb4069d | 254 | } |
screamer | 0:7a64fbb4069d | 255 | |
screamer | 0:7a64fbb4069d | 256 | /* to be clearer, we return NULL here instead of |
screamer | 0:7a64fbb4069d | 257 | * 'group' (which is also NULL at this point). |
screamer | 0:7a64fbb4069d | 258 | */ |
screamer | 0:7a64fbb4069d | 259 | return NULL; |
screamer | 0:7a64fbb4069d | 260 | } |
screamer | 0:7a64fbb4069d | 261 | |
screamer | 0:7a64fbb4069d | 262 | /** |
screamer | 0:7a64fbb4069d | 263 | * Search for a specific igmp group and create a new one if not found- |
screamer | 0:7a64fbb4069d | 264 | * |
screamer | 0:7a64fbb4069d | 265 | * @param ifp the network interface for which to look |
screamer | 0:7a64fbb4069d | 266 | * @param addr the group ip address to search |
screamer | 0:7a64fbb4069d | 267 | * @return a struct igmp_group*, |
screamer | 0:7a64fbb4069d | 268 | * NULL on memory error. |
screamer | 0:7a64fbb4069d | 269 | */ |
screamer | 0:7a64fbb4069d | 270 | struct igmp_group * |
screamer | 0:7a64fbb4069d | 271 | igmp_lookup_group(struct netif *ifp, struct ip_addr *addr) |
screamer | 0:7a64fbb4069d | 272 | { |
screamer | 0:7a64fbb4069d | 273 | struct igmp_group *group = igmp_group_list; |
screamer | 0:7a64fbb4069d | 274 | |
screamer | 0:7a64fbb4069d | 275 | /* Search if the group already exists */ |
screamer | 0:7a64fbb4069d | 276 | group = igmp_lookfor_group(ifp, addr); |
screamer | 0:7a64fbb4069d | 277 | if (group != NULL) { |
screamer | 0:7a64fbb4069d | 278 | /* Group already exists. */ |
screamer | 0:7a64fbb4069d | 279 | return group; |
screamer | 0:7a64fbb4069d | 280 | } |
screamer | 0:7a64fbb4069d | 281 | |
screamer | 0:7a64fbb4069d | 282 | /* Group doesn't exist yet, create a new one */ |
screamer | 0:7a64fbb4069d | 283 | group = (struct igmp_group *)memp_malloc(MEMP_IGMP_GROUP); // static_cast<struct igmp_group *>(x) |
screamer | 0:7a64fbb4069d | 284 | if (group != NULL) { |
screamer | 0:7a64fbb4069d | 285 | group->interface = ifp; |
screamer | 0:7a64fbb4069d | 286 | ip_addr_set(&(group->group_address), addr); |
screamer | 0:7a64fbb4069d | 287 | group->timer = 0; /* Not running */ |
screamer | 0:7a64fbb4069d | 288 | group->group_state = IGMP_GROUP_NON_MEMBER; |
screamer | 0:7a64fbb4069d | 289 | group->last_reporter_flag = 0; |
screamer | 0:7a64fbb4069d | 290 | group->use = 0; |
screamer | 0:7a64fbb4069d | 291 | group->next = igmp_group_list; |
screamer | 0:7a64fbb4069d | 292 | |
screamer | 0:7a64fbb4069d | 293 | igmp_group_list = group; |
screamer | 0:7a64fbb4069d | 294 | } |
screamer | 0:7a64fbb4069d | 295 | |
screamer | 0:7a64fbb4069d | 296 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_lookup_group: %sallocated a new group with address ", (group?"":"impossible to "))); |
screamer | 0:7a64fbb4069d | 297 | ip_addr_debug_print(IGMP_DEBUG, addr); |
screamer | 0:7a64fbb4069d | 298 | LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", ifp)); |
screamer | 0:7a64fbb4069d | 299 | |
screamer | 0:7a64fbb4069d | 300 | return group; |
screamer | 0:7a64fbb4069d | 301 | } |
screamer | 0:7a64fbb4069d | 302 | |
screamer | 0:7a64fbb4069d | 303 | /** |
screamer | 0:7a64fbb4069d | 304 | * Remove a group in the global igmp_group_list |
screamer | 0:7a64fbb4069d | 305 | * |
screamer | 0:7a64fbb4069d | 306 | * @param group the group to remove from the global igmp_group_list |
screamer | 0:7a64fbb4069d | 307 | * @return ERR_OK if group was removed from the list, an err_t otherwise |
screamer | 0:7a64fbb4069d | 308 | */ |
screamer | 0:7a64fbb4069d | 309 | err_t |
screamer | 0:7a64fbb4069d | 310 | igmp_remove_group(struct igmp_group *group) |
screamer | 0:7a64fbb4069d | 311 | { |
screamer | 0:7a64fbb4069d | 312 | err_t err = ERR_OK; |
screamer | 0:7a64fbb4069d | 313 | |
screamer | 0:7a64fbb4069d | 314 | /* Is it the first group? */ |
screamer | 0:7a64fbb4069d | 315 | if (igmp_group_list == group) { |
screamer | 0:7a64fbb4069d | 316 | igmp_group_list = group->next; |
screamer | 0:7a64fbb4069d | 317 | } else { |
screamer | 0:7a64fbb4069d | 318 | /* look for group further down the list */ |
screamer | 0:7a64fbb4069d | 319 | struct igmp_group *tmpGroup; |
screamer | 0:7a64fbb4069d | 320 | for (tmpGroup = igmp_group_list; tmpGroup != NULL; tmpGroup = tmpGroup->next) { |
screamer | 0:7a64fbb4069d | 321 | if (tmpGroup->next == group) { |
screamer | 0:7a64fbb4069d | 322 | tmpGroup->next = group->next; |
screamer | 0:7a64fbb4069d | 323 | break; |
screamer | 0:7a64fbb4069d | 324 | } |
screamer | 0:7a64fbb4069d | 325 | } |
screamer | 0:7a64fbb4069d | 326 | /* Group not found in the global igmp_group_list */ |
screamer | 0:7a64fbb4069d | 327 | if (tmpGroup == NULL) |
screamer | 0:7a64fbb4069d | 328 | err = ERR_ARG; |
screamer | 0:7a64fbb4069d | 329 | } |
screamer | 0:7a64fbb4069d | 330 | /* free group */ |
screamer | 0:7a64fbb4069d | 331 | memp_free(MEMP_IGMP_GROUP, group); |
screamer | 0:7a64fbb4069d | 332 | |
screamer | 0:7a64fbb4069d | 333 | return err; |
screamer | 0:7a64fbb4069d | 334 | } |
screamer | 0:7a64fbb4069d | 335 | |
screamer | 0:7a64fbb4069d | 336 | /** |
screamer | 0:7a64fbb4069d | 337 | * Called from ip_input() if a new IGMP packet is received. |
screamer | 0:7a64fbb4069d | 338 | * |
screamer | 0:7a64fbb4069d | 339 | * @param p received igmp packet, p->payload pointing to the ip header |
screamer | 0:7a64fbb4069d | 340 | * @param inp network interface on which the packet was received |
screamer | 0:7a64fbb4069d | 341 | * @param dest destination ip address of the igmp packet |
screamer | 0:7a64fbb4069d | 342 | */ |
screamer | 0:7a64fbb4069d | 343 | void |
screamer | 0:7a64fbb4069d | 344 | igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest) |
screamer | 0:7a64fbb4069d | 345 | { |
screamer | 0:7a64fbb4069d | 346 | struct ip_hdr * iphdr; |
screamer | 0:7a64fbb4069d | 347 | struct igmp_msg* igmp; |
screamer | 0:7a64fbb4069d | 348 | struct igmp_group* group; |
screamer | 0:7a64fbb4069d | 349 | struct igmp_group* groupref; |
screamer | 0:7a64fbb4069d | 350 | |
screamer | 0:7a64fbb4069d | 351 | /* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */ |
screamer | 0:7a64fbb4069d | 352 | iphdr = (struct ip_hdr *)p->payload; // static_cast<struct ip_hdr *>(x) |
screamer | 0:7a64fbb4069d | 353 | if (pbuf_header(p, -(s16_t)(IPH_HL(iphdr) * 4)) || (p->len < IGMP_MINLEN)) { |
screamer | 0:7a64fbb4069d | 354 | pbuf_free(p); |
screamer | 0:7a64fbb4069d | 355 | IGMP_STATS_INC(igmp.lenerr); |
screamer | 0:7a64fbb4069d | 356 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: length error\n")); |
screamer | 0:7a64fbb4069d | 357 | return; |
screamer | 0:7a64fbb4069d | 358 | } |
screamer | 0:7a64fbb4069d | 359 | |
screamer | 0:7a64fbb4069d | 360 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: message from ")); |
screamer | 0:7a64fbb4069d | 361 | ip_addr_debug_print(IGMP_DEBUG, &(iphdr->src)); |
screamer | 0:7a64fbb4069d | 362 | LWIP_DEBUGF(IGMP_DEBUG, (" to address ")); |
screamer | 0:7a64fbb4069d | 363 | ip_addr_debug_print(IGMP_DEBUG, &(iphdr->dest)); |
screamer | 0:7a64fbb4069d | 364 | LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", inp)); |
screamer | 0:7a64fbb4069d | 365 | |
screamer | 0:7a64fbb4069d | 366 | /* Now calculate and check the checksum */ |
screamer | 0:7a64fbb4069d | 367 | igmp = (struct igmp_msg *)p->payload; |
screamer | 0:7a64fbb4069d | 368 | if (inet_chksum(igmp, p->len)) { |
screamer | 0:7a64fbb4069d | 369 | pbuf_free(p); |
screamer | 0:7a64fbb4069d | 370 | IGMP_STATS_INC(igmp.chkerr); |
screamer | 0:7a64fbb4069d | 371 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: checksum error\n")); |
screamer | 0:7a64fbb4069d | 372 | return; |
screamer | 0:7a64fbb4069d | 373 | } |
screamer | 0:7a64fbb4069d | 374 | |
screamer | 0:7a64fbb4069d | 375 | /* Packet is ok so find an existing group */ |
screamer | 0:7a64fbb4069d | 376 | group = igmp_lookfor_group(inp, dest); /* use the incoming IP address! */ |
screamer | 0:7a64fbb4069d | 377 | |
screamer | 0:7a64fbb4069d | 378 | /* If group can be found or create... */ |
screamer | 0:7a64fbb4069d | 379 | if (!group) { |
screamer | 0:7a64fbb4069d | 380 | pbuf_free(p); |
screamer | 0:7a64fbb4069d | 381 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP frame not for us\n")); |
screamer | 0:7a64fbb4069d | 382 | return; |
screamer | 0:7a64fbb4069d | 383 | } |
screamer | 0:7a64fbb4069d | 384 | |
screamer | 0:7a64fbb4069d | 385 | /* NOW ACT ON THE INCOMING MESSAGE TYPE... */ |
screamer | 0:7a64fbb4069d | 386 | switch (igmp->igmp_msgtype) { |
screamer | 0:7a64fbb4069d | 387 | case IGMP_MEMB_QUERY: { |
screamer | 0:7a64fbb4069d | 388 | /* IGMP_MEMB_QUERY to the "all systems" address ? */ |
screamer | 0:7a64fbb4069d | 389 | if ((ip_addr_cmp(dest, &allsystems)) && (igmp->igmp_group_address.addr == 0)) { |
screamer | 0:7a64fbb4069d | 390 | /* THIS IS THE GENERAL QUERY */ |
screamer | 0:7a64fbb4069d | 391 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: General IGMP_MEMB_QUERY on \"ALL SYSTEMS\" address (224.0.0.1) [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp))); |
screamer | 0:7a64fbb4069d | 392 | |
screamer | 0:7a64fbb4069d | 393 | if (igmp->igmp_maxresp == 0) { |
screamer | 0:7a64fbb4069d | 394 | IGMP_STATS_INC(igmp.v1_rxed); |
screamer | 0:7a64fbb4069d | 395 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: got an all hosts query with time== 0 - this is V1 and not implemented - treat as v2\n")); |
screamer | 0:7a64fbb4069d | 396 | igmp->igmp_maxresp = IGMP_V1_DELAYING_MEMBER_TMR; |
screamer | 0:7a64fbb4069d | 397 | } |
screamer | 0:7a64fbb4069d | 398 | |
screamer | 0:7a64fbb4069d | 399 | IGMP_STATS_INC(igmp.group_query_rxed); |
screamer | 0:7a64fbb4069d | 400 | groupref = igmp_group_list; |
screamer | 0:7a64fbb4069d | 401 | while (groupref) { |
screamer | 0:7a64fbb4069d | 402 | /* Do not send messages on the all systems group address! */ |
screamer | 0:7a64fbb4069d | 403 | if ((groupref->interface == inp) && (!(ip_addr_cmp(&(groupref->group_address), &allsystems)))) { |
screamer | 0:7a64fbb4069d | 404 | igmp_delaying_member( groupref, igmp->igmp_maxresp); |
screamer | 0:7a64fbb4069d | 405 | } |
screamer | 0:7a64fbb4069d | 406 | groupref = groupref->next; |
screamer | 0:7a64fbb4069d | 407 | } |
screamer | 0:7a64fbb4069d | 408 | } else { |
screamer | 0:7a64fbb4069d | 409 | /* IGMP_MEMB_QUERY to a specific group ? */ |
screamer | 0:7a64fbb4069d | 410 | if (group->group_address.addr != 0) { |
screamer | 0:7a64fbb4069d | 411 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP_MEMB_QUERY to a specific group ")); |
screamer | 0:7a64fbb4069d | 412 | ip_addr_debug_print(IGMP_DEBUG, &group->group_address); |
screamer | 0:7a64fbb4069d | 413 | if (ip_addr_cmp (dest, &allsystems)) { |
screamer | 0:7a64fbb4069d | 414 | LWIP_DEBUGF(IGMP_DEBUG, (" using \"ALL SYSTEMS\" address (224.0.0.1) [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp))); |
screamer | 0:7a64fbb4069d | 415 | /* we first need to re-lookfor the group since we used dest last time */ |
screamer | 0:7a64fbb4069d | 416 | group = igmp_lookfor_group(inp, &igmp->igmp_group_address); |
screamer | 0:7a64fbb4069d | 417 | } else { |
screamer | 0:7a64fbb4069d | 418 | LWIP_DEBUGF(IGMP_DEBUG, (" with the group address as destination [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp))); |
screamer | 0:7a64fbb4069d | 419 | } |
screamer | 0:7a64fbb4069d | 420 | |
screamer | 0:7a64fbb4069d | 421 | if (group != NULL) { |
screamer | 0:7a64fbb4069d | 422 | IGMP_STATS_INC(igmp.unicast_query); |
screamer | 0:7a64fbb4069d | 423 | igmp_delaying_member( group, igmp->igmp_maxresp); |
screamer | 0:7a64fbb4069d | 424 | } |
screamer | 0:7a64fbb4069d | 425 | } |
screamer | 0:7a64fbb4069d | 426 | } |
screamer | 0:7a64fbb4069d | 427 | break; |
screamer | 0:7a64fbb4069d | 428 | } |
screamer | 0:7a64fbb4069d | 429 | case IGMP_V2_MEMB_REPORT: { |
screamer | 0:7a64fbb4069d | 430 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP_V2_MEMB_REPORT\n")); |
screamer | 0:7a64fbb4069d | 431 | |
screamer | 0:7a64fbb4069d | 432 | IGMP_STATS_INC(igmp.report_rxed); |
screamer | 0:7a64fbb4069d | 433 | if (group->group_state == IGMP_GROUP_DELAYING_MEMBER) { |
screamer | 0:7a64fbb4069d | 434 | /* This is on a specific group we have already looked up */ |
screamer | 0:7a64fbb4069d | 435 | group->timer = 0; /* stopped */ |
screamer | 0:7a64fbb4069d | 436 | group->group_state = IGMP_GROUP_IDLE_MEMBER; |
screamer | 0:7a64fbb4069d | 437 | group->last_reporter_flag = 0; |
screamer | 0:7a64fbb4069d | 438 | } |
screamer | 0:7a64fbb4069d | 439 | break; |
screamer | 0:7a64fbb4069d | 440 | } |
screamer | 0:7a64fbb4069d | 441 | default: { |
screamer | 0:7a64fbb4069d | 442 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: unexpected msg %d in state %d on group %p on if %p\n", |
screamer | 0:7a64fbb4069d | 443 | igmp->igmp_msgtype, group->group_state, &group, group->interface)); |
screamer | 0:7a64fbb4069d | 444 | break; |
screamer | 0:7a64fbb4069d | 445 | } |
screamer | 0:7a64fbb4069d | 446 | } |
screamer | 0:7a64fbb4069d | 447 | |
screamer | 0:7a64fbb4069d | 448 | pbuf_free(p); |
screamer | 0:7a64fbb4069d | 449 | return; |
screamer | 0:7a64fbb4069d | 450 | } |
screamer | 0:7a64fbb4069d | 451 | |
screamer | 0:7a64fbb4069d | 452 | /** |
screamer | 0:7a64fbb4069d | 453 | * Join a group on one network interface. |
screamer | 0:7a64fbb4069d | 454 | * |
screamer | 0:7a64fbb4069d | 455 | * @param ifaddr ip address of the network interface which should join a new group |
screamer | 0:7a64fbb4069d | 456 | * @param groupaddr the ip address of the group which to join |
screamer | 0:7a64fbb4069d | 457 | * @return ERR_OK if group was joined on the netif(s), an err_t otherwise |
screamer | 0:7a64fbb4069d | 458 | */ |
screamer | 0:7a64fbb4069d | 459 | err_t |
screamer | 0:7a64fbb4069d | 460 | igmp_joingroup(struct ip_addr *ifaddr, struct ip_addr *groupaddr) |
screamer | 0:7a64fbb4069d | 461 | { |
screamer | 0:7a64fbb4069d | 462 | err_t err = ERR_VAL; /* no matching interface */ |
screamer | 0:7a64fbb4069d | 463 | struct igmp_group *group; |
screamer | 0:7a64fbb4069d | 464 | struct netif *netif; |
screamer | 0:7a64fbb4069d | 465 | |
screamer | 0:7a64fbb4069d | 466 | /* make sure it is multicast address */ |
screamer | 0:7a64fbb4069d | 467 | LWIP_ERROR("igmp_joingroup: attempt to join non-multicast address", ip_addr_ismulticast(groupaddr), return ERR_VAL;); |
screamer | 0:7a64fbb4069d | 468 | LWIP_ERROR("igmp_joingroup: attempt to join allsystems address", (!ip_addr_cmp(groupaddr, &allsystems)), return ERR_VAL;); |
screamer | 0:7a64fbb4069d | 469 | |
screamer | 0:7a64fbb4069d | 470 | /* loop through netif's */ |
screamer | 0:7a64fbb4069d | 471 | netif = netif_list; |
screamer | 0:7a64fbb4069d | 472 | while (netif != NULL) { |
screamer | 0:7a64fbb4069d | 473 | /* Should we join this interface ? */ |
screamer | 0:7a64fbb4069d | 474 | if ((netif->flags & NETIF_FLAG_IGMP) && ((ip_addr_isany(ifaddr) || ip_addr_cmp(&(netif->ip_addr), ifaddr)))) { |
screamer | 0:7a64fbb4069d | 475 | /* find group or create a new one if not found */ |
screamer | 0:7a64fbb4069d | 476 | group = igmp_lookup_group(netif, groupaddr); |
screamer | 0:7a64fbb4069d | 477 | |
screamer | 0:7a64fbb4069d | 478 | if (group != NULL) { |
screamer | 0:7a64fbb4069d | 479 | /* This should create a new group, check the state to make sure */ |
screamer | 0:7a64fbb4069d | 480 | if (group->group_state != IGMP_GROUP_NON_MEMBER) { |
screamer | 0:7a64fbb4069d | 481 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: join to group not in state IGMP_GROUP_NON_MEMBER\n")); |
screamer | 0:7a64fbb4069d | 482 | } else { |
screamer | 0:7a64fbb4069d | 483 | /* OK - it was new group */ |
screamer | 0:7a64fbb4069d | 484 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: join to new group: ")); |
screamer | 0:7a64fbb4069d | 485 | ip_addr_debug_print(IGMP_DEBUG, groupaddr); |
screamer | 0:7a64fbb4069d | 486 | LWIP_DEBUGF(IGMP_DEBUG, ("\n")); |
screamer | 0:7a64fbb4069d | 487 | |
screamer | 0:7a64fbb4069d | 488 | /* If first use of the group, allow the group at the MAC level */ |
screamer | 0:7a64fbb4069d | 489 | if ((group->use==0) && (netif->igmp_mac_filter != NULL)) { |
screamer | 0:7a64fbb4069d | 490 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: igmp_mac_filter(ADD ")); |
screamer | 0:7a64fbb4069d | 491 | ip_addr_debug_print(IGMP_DEBUG, groupaddr); |
screamer | 0:7a64fbb4069d | 492 | LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", netif)); |
screamer | 0:7a64fbb4069d | 493 | netif->igmp_mac_filter(netif, groupaddr, IGMP_ADD_MAC_FILTER); |
screamer | 0:7a64fbb4069d | 494 | } |
screamer | 0:7a64fbb4069d | 495 | |
screamer | 0:7a64fbb4069d | 496 | IGMP_STATS_INC(igmp.join_sent); |
screamer | 0:7a64fbb4069d | 497 | igmp_send(group, IGMP_V2_MEMB_REPORT); |
screamer | 0:7a64fbb4069d | 498 | |
screamer | 0:7a64fbb4069d | 499 | igmp_start_timer(group, IGMP_JOIN_DELAYING_MEMBER_TMR); |
screamer | 0:7a64fbb4069d | 500 | |
screamer | 0:7a64fbb4069d | 501 | /* Need to work out where this timer comes from */ |
screamer | 0:7a64fbb4069d | 502 | group->group_state = IGMP_GROUP_DELAYING_MEMBER; |
screamer | 0:7a64fbb4069d | 503 | } |
screamer | 0:7a64fbb4069d | 504 | /* Increment group use */ |
screamer | 0:7a64fbb4069d | 505 | group->use++; |
screamer | 0:7a64fbb4069d | 506 | /* Join on this interface */ |
screamer | 0:7a64fbb4069d | 507 | err = ERR_OK; |
screamer | 0:7a64fbb4069d | 508 | } else { |
screamer | 0:7a64fbb4069d | 509 | /* Return an error even if some network interfaces are joined */ |
screamer | 0:7a64fbb4069d | 510 | /** @todo undo any other netif already joined */ |
screamer | 0:7a64fbb4069d | 511 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: Not enought memory to join to group\n")); |
screamer | 0:7a64fbb4069d | 512 | return ERR_MEM; |
screamer | 0:7a64fbb4069d | 513 | } |
screamer | 0:7a64fbb4069d | 514 | } |
screamer | 0:7a64fbb4069d | 515 | /* proceed to next network interface */ |
screamer | 0:7a64fbb4069d | 516 | netif = netif->next; |
screamer | 0:7a64fbb4069d | 517 | } |
screamer | 0:7a64fbb4069d | 518 | |
screamer | 0:7a64fbb4069d | 519 | return err; |
screamer | 0:7a64fbb4069d | 520 | } |
screamer | 0:7a64fbb4069d | 521 | |
screamer | 0:7a64fbb4069d | 522 | /** |
screamer | 0:7a64fbb4069d | 523 | * Leave a group on one network interface. |
screamer | 0:7a64fbb4069d | 524 | * |
screamer | 0:7a64fbb4069d | 525 | * @param ifaddr ip address of the network interface which should leave a group |
screamer | 0:7a64fbb4069d | 526 | * @param groupaddr the ip address of the group which to leave |
screamer | 0:7a64fbb4069d | 527 | * @return ERR_OK if group was left on the netif(s), an err_t otherwise |
screamer | 0:7a64fbb4069d | 528 | */ |
screamer | 0:7a64fbb4069d | 529 | err_t |
screamer | 0:7a64fbb4069d | 530 | igmp_leavegroup(struct ip_addr *ifaddr, struct ip_addr *groupaddr) |
screamer | 0:7a64fbb4069d | 531 | { |
screamer | 0:7a64fbb4069d | 532 | err_t err = ERR_VAL; /* no matching interface */ |
screamer | 0:7a64fbb4069d | 533 | struct igmp_group *group; |
screamer | 0:7a64fbb4069d | 534 | struct netif *netif; |
screamer | 0:7a64fbb4069d | 535 | |
screamer | 0:7a64fbb4069d | 536 | /* make sure it is multicast address */ |
screamer | 0:7a64fbb4069d | 537 | LWIP_ERROR("igmp_leavegroup: attempt to leave non-multicast address", ip_addr_ismulticast(groupaddr), return ERR_VAL;); |
screamer | 0:7a64fbb4069d | 538 | LWIP_ERROR("igmp_leavegroup: attempt to leave allsystems address", (!ip_addr_cmp(groupaddr, &allsystems)), return ERR_VAL;); |
screamer | 0:7a64fbb4069d | 539 | |
screamer | 0:7a64fbb4069d | 540 | /* loop through netif's */ |
screamer | 0:7a64fbb4069d | 541 | netif = netif_list; |
screamer | 0:7a64fbb4069d | 542 | while (netif != NULL) { |
screamer | 0:7a64fbb4069d | 543 | /* Should we leave this interface ? */ |
screamer | 0:7a64fbb4069d | 544 | if ((netif->flags & NETIF_FLAG_IGMP) && ((ip_addr_isany(ifaddr) || ip_addr_cmp(&(netif->ip_addr), ifaddr)))) { |
screamer | 0:7a64fbb4069d | 545 | /* find group */ |
screamer | 0:7a64fbb4069d | 546 | group = igmp_lookfor_group(netif, groupaddr); |
screamer | 0:7a64fbb4069d | 547 | |
screamer | 0:7a64fbb4069d | 548 | if (group != NULL) { |
screamer | 0:7a64fbb4069d | 549 | /* Only send a leave if the flag is set according to the state diagram */ |
screamer | 0:7a64fbb4069d | 550 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: Leaving group: ")); |
screamer | 0:7a64fbb4069d | 551 | ip_addr_debug_print(IGMP_DEBUG, groupaddr); |
screamer | 0:7a64fbb4069d | 552 | LWIP_DEBUGF(IGMP_DEBUG, ("\n")); |
screamer | 0:7a64fbb4069d | 553 | |
screamer | 0:7a64fbb4069d | 554 | /* If there is no other use of the group */ |
screamer | 0:7a64fbb4069d | 555 | if (group->use <= 1) { |
screamer | 0:7a64fbb4069d | 556 | /* If we are the last reporter for this group */ |
screamer | 0:7a64fbb4069d | 557 | if (group->last_reporter_flag) { |
screamer | 0:7a64fbb4069d | 558 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: sending leaving group\n")); |
screamer | 0:7a64fbb4069d | 559 | IGMP_STATS_INC(igmp.leave_sent); |
screamer | 0:7a64fbb4069d | 560 | igmp_send(group, IGMP_LEAVE_GROUP); |
screamer | 0:7a64fbb4069d | 561 | } |
screamer | 0:7a64fbb4069d | 562 | |
screamer | 0:7a64fbb4069d | 563 | /* Disable the group at the MAC level */ |
screamer | 0:7a64fbb4069d | 564 | if (netif->igmp_mac_filter != NULL) { |
screamer | 0:7a64fbb4069d | 565 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: igmp_mac_filter(DEL ")); |
screamer | 0:7a64fbb4069d | 566 | ip_addr_debug_print(IGMP_DEBUG, groupaddr); |
screamer | 0:7a64fbb4069d | 567 | LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", netif)); |
screamer | 0:7a64fbb4069d | 568 | netif->igmp_mac_filter(netif, groupaddr, IGMP_DEL_MAC_FILTER); |
screamer | 0:7a64fbb4069d | 569 | } |
screamer | 0:7a64fbb4069d | 570 | |
screamer | 0:7a64fbb4069d | 571 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: remove group: ")); |
screamer | 0:7a64fbb4069d | 572 | ip_addr_debug_print(IGMP_DEBUG, groupaddr); |
screamer | 0:7a64fbb4069d | 573 | LWIP_DEBUGF(IGMP_DEBUG, ("\n")); |
screamer | 0:7a64fbb4069d | 574 | |
screamer | 0:7a64fbb4069d | 575 | /* Free the group */ |
screamer | 0:7a64fbb4069d | 576 | igmp_remove_group(group); |
screamer | 0:7a64fbb4069d | 577 | } else { |
screamer | 0:7a64fbb4069d | 578 | /* Decrement group use */ |
screamer | 0:7a64fbb4069d | 579 | group->use--; |
screamer | 0:7a64fbb4069d | 580 | } |
screamer | 0:7a64fbb4069d | 581 | /* Leave on this interface */ |
screamer | 0:7a64fbb4069d | 582 | err = ERR_OK; |
screamer | 0:7a64fbb4069d | 583 | } else { |
screamer | 0:7a64fbb4069d | 584 | /* It's not a fatal error on "leavegroup" */ |
screamer | 0:7a64fbb4069d | 585 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: not member of group\n")); |
screamer | 0:7a64fbb4069d | 586 | } |
screamer | 0:7a64fbb4069d | 587 | } |
screamer | 0:7a64fbb4069d | 588 | /* proceed to next network interface */ |
screamer | 0:7a64fbb4069d | 589 | netif = netif->next; |
screamer | 0:7a64fbb4069d | 590 | } |
screamer | 0:7a64fbb4069d | 591 | |
screamer | 0:7a64fbb4069d | 592 | return err; |
screamer | 0:7a64fbb4069d | 593 | } |
screamer | 0:7a64fbb4069d | 594 | |
screamer | 0:7a64fbb4069d | 595 | /** |
screamer | 0:7a64fbb4069d | 596 | * The igmp timer function (both for NO_SYS=1 and =0) |
screamer | 0:7a64fbb4069d | 597 | * Should be called every IGMP_TMR_INTERVAL milliseconds (100 ms is default). |
screamer | 0:7a64fbb4069d | 598 | */ |
screamer | 0:7a64fbb4069d | 599 | void |
screamer | 0:7a64fbb4069d | 600 | igmp_tmr(void) |
screamer | 0:7a64fbb4069d | 601 | { |
screamer | 0:7a64fbb4069d | 602 | struct igmp_group *group = igmp_group_list; |
screamer | 0:7a64fbb4069d | 603 | |
screamer | 0:7a64fbb4069d | 604 | while (group != NULL) { |
screamer | 0:7a64fbb4069d | 605 | if (group->timer != 0) { |
screamer | 0:7a64fbb4069d | 606 | group->timer -= 1; |
screamer | 0:7a64fbb4069d | 607 | if (group->timer == 0) { |
screamer | 0:7a64fbb4069d | 608 | igmp_timeout(group); |
screamer | 0:7a64fbb4069d | 609 | } |
screamer | 0:7a64fbb4069d | 610 | } |
screamer | 0:7a64fbb4069d | 611 | group = group->next; |
screamer | 0:7a64fbb4069d | 612 | } |
screamer | 0:7a64fbb4069d | 613 | } |
screamer | 0:7a64fbb4069d | 614 | |
screamer | 0:7a64fbb4069d | 615 | /** |
screamer | 0:7a64fbb4069d | 616 | * Called if a timeout for one group is reached. |
screamer | 0:7a64fbb4069d | 617 | * Sends a report for this group. |
screamer | 0:7a64fbb4069d | 618 | * |
screamer | 0:7a64fbb4069d | 619 | * @param group an igmp_group for which a timeout is reached |
screamer | 0:7a64fbb4069d | 620 | */ |
screamer | 0:7a64fbb4069d | 621 | void |
screamer | 0:7a64fbb4069d | 622 | igmp_timeout(struct igmp_group *group) |
screamer | 0:7a64fbb4069d | 623 | { |
screamer | 0:7a64fbb4069d | 624 | /* If the state is IGMP_GROUP_DELAYING_MEMBER then we send a report for this group */ |
screamer | 0:7a64fbb4069d | 625 | if (group->group_state == IGMP_GROUP_DELAYING_MEMBER) { |
screamer | 0:7a64fbb4069d | 626 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_timeout: report membership for group with address ")); |
screamer | 0:7a64fbb4069d | 627 | ip_addr_debug_print(IGMP_DEBUG, &(group->group_address)); |
screamer | 0:7a64fbb4069d | 628 | LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", group->interface)); |
screamer | 0:7a64fbb4069d | 629 | |
screamer | 0:7a64fbb4069d | 630 | igmp_send(group, IGMP_V2_MEMB_REPORT); |
screamer | 0:7a64fbb4069d | 631 | } |
screamer | 0:7a64fbb4069d | 632 | } |
screamer | 0:7a64fbb4069d | 633 | |
screamer | 0:7a64fbb4069d | 634 | /** |
screamer | 0:7a64fbb4069d | 635 | * Start a timer for an igmp group |
screamer | 0:7a64fbb4069d | 636 | * |
screamer | 0:7a64fbb4069d | 637 | * @param group the igmp_group for which to start a timer |
screamer | 0:7a64fbb4069d | 638 | * @param max_time the time in multiples of IGMP_TMR_INTERVAL (decrease with |
screamer | 0:7a64fbb4069d | 639 | * every call to igmp_tmr()) |
screamer | 0:7a64fbb4069d | 640 | */ |
screamer | 0:7a64fbb4069d | 641 | void |
screamer | 0:7a64fbb4069d | 642 | igmp_start_timer(struct igmp_group *group, u8_t max_time) |
screamer | 0:7a64fbb4069d | 643 | { |
screamer | 0:7a64fbb4069d | 644 | /** |
screamer | 0:7a64fbb4069d | 645 | * @todo Important !! this should be random 0 -> max_time. Find out how to do this |
screamer | 0:7a64fbb4069d | 646 | */ |
screamer | 0:7a64fbb4069d | 647 | group->timer = max_time; |
screamer | 0:7a64fbb4069d | 648 | } |
screamer | 0:7a64fbb4069d | 649 | |
screamer | 0:7a64fbb4069d | 650 | /** |
screamer | 0:7a64fbb4069d | 651 | * Stop a timer for an igmp_group |
screamer | 0:7a64fbb4069d | 652 | * |
screamer | 0:7a64fbb4069d | 653 | * @param group the igmp_group for which to stop the timer |
screamer | 0:7a64fbb4069d | 654 | */ |
screamer | 0:7a64fbb4069d | 655 | void |
screamer | 0:7a64fbb4069d | 656 | igmp_stop_timer(struct igmp_group *group) |
screamer | 0:7a64fbb4069d | 657 | { |
screamer | 0:7a64fbb4069d | 658 | group->timer = 0; |
screamer | 0:7a64fbb4069d | 659 | } |
screamer | 0:7a64fbb4069d | 660 | |
screamer | 0:7a64fbb4069d | 661 | /** |
screamer | 0:7a64fbb4069d | 662 | * Delaying membership report for a group if necessary |
screamer | 0:7a64fbb4069d | 663 | * |
screamer | 0:7a64fbb4069d | 664 | * @param group the igmp_group for which "delaying" membership report |
screamer | 0:7a64fbb4069d | 665 | * @param maxresp query delay |
screamer | 0:7a64fbb4069d | 666 | */ |
screamer | 0:7a64fbb4069d | 667 | void |
screamer | 0:7a64fbb4069d | 668 | igmp_delaying_member( struct igmp_group *group, u8_t maxresp) |
screamer | 0:7a64fbb4069d | 669 | { |
screamer | 0:7a64fbb4069d | 670 | if ((group->group_state == IGMP_GROUP_IDLE_MEMBER) || ((group->group_state == IGMP_GROUP_DELAYING_MEMBER) && (maxresp > group->timer))) { |
screamer | 0:7a64fbb4069d | 671 | igmp_start_timer(group, (maxresp)/2); |
screamer | 0:7a64fbb4069d | 672 | group->group_state = IGMP_GROUP_DELAYING_MEMBER; |
screamer | 0:7a64fbb4069d | 673 | } |
screamer | 0:7a64fbb4069d | 674 | } |
screamer | 0:7a64fbb4069d | 675 | |
screamer | 0:7a64fbb4069d | 676 | |
screamer | 0:7a64fbb4069d | 677 | /** |
screamer | 0:7a64fbb4069d | 678 | * Sends an IP packet on a network interface. This function constructs the IP header |
screamer | 0:7a64fbb4069d | 679 | * and calculates the IP header checksum. If the source IP address is NULL, |
screamer | 0:7a64fbb4069d | 680 | * the IP address of the outgoing network interface is filled in as source address. |
screamer | 0:7a64fbb4069d | 681 | * |
screamer | 0:7a64fbb4069d | 682 | * @param p the packet to send (p->payload points to the data, e.g. next |
screamer | 0:7a64fbb4069d | 683 | protocol header; if dest == IP_HDRINCL, p already includes an IP |
screamer | 0:7a64fbb4069d | 684 | header and p->payload points to that IP header) |
screamer | 0:7a64fbb4069d | 685 | * @param src the source IP address to send from (if src == IP_ADDR_ANY, the |
screamer | 0:7a64fbb4069d | 686 | * IP address of the netif used to send is used as source address) |
screamer | 0:7a64fbb4069d | 687 | * @param dest the destination IP address to send the packet to |
screamer | 0:7a64fbb4069d | 688 | * @param ttl the TTL value to be set in the IP header |
screamer | 0:7a64fbb4069d | 689 | * @param proto the PROTOCOL to be set in the IP header |
screamer | 0:7a64fbb4069d | 690 | * @param netif the netif on which to send this packet |
screamer | 0:7a64fbb4069d | 691 | * @return ERR_OK if the packet was sent OK |
screamer | 0:7a64fbb4069d | 692 | * ERR_BUF if p doesn't have enough space for IP/LINK headers |
screamer | 0:7a64fbb4069d | 693 | * returns errors returned by netif->output |
screamer | 0:7a64fbb4069d | 694 | */ |
screamer | 0:7a64fbb4069d | 695 | err_t |
screamer | 0:7a64fbb4069d | 696 | igmp_ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, |
screamer | 0:7a64fbb4069d | 697 | u8_t ttl, u8_t proto, struct netif *netif) |
screamer | 0:7a64fbb4069d | 698 | { |
screamer | 0:7a64fbb4069d | 699 | static u16_t ip_id = 0; |
screamer | 0:7a64fbb4069d | 700 | struct ip_hdr * iphdr = NULL; |
screamer | 0:7a64fbb4069d | 701 | u16_t * ra = NULL; |
screamer | 0:7a64fbb4069d | 702 | |
screamer | 0:7a64fbb4069d | 703 | /* First write in the "router alert" */ |
screamer | 0:7a64fbb4069d | 704 | if (pbuf_header(p, ROUTER_ALERTLEN)) { |
screamer | 0:7a64fbb4069d | 705 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n")); |
screamer | 0:7a64fbb4069d | 706 | return ERR_BUF; |
screamer | 0:7a64fbb4069d | 707 | } |
screamer | 0:7a64fbb4069d | 708 | |
screamer | 0:7a64fbb4069d | 709 | /* This is the "router alert" option */ |
screamer | 0:7a64fbb4069d | 710 | ra = (u16_t *)p->payload; // static_cast<u16_t>(x) |
screamer | 0:7a64fbb4069d | 711 | ra[0] = htons (ROUTER_ALERT); |
screamer | 0:7a64fbb4069d | 712 | ra[1] = 0x0000; /* Router shall examine packet */ |
screamer | 0:7a64fbb4069d | 713 | |
screamer | 0:7a64fbb4069d | 714 | /* now the normal ip header */ |
screamer | 0:7a64fbb4069d | 715 | if (pbuf_header(p, IP_HLEN)) { |
screamer | 0:7a64fbb4069d | 716 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n")); |
screamer | 0:7a64fbb4069d | 717 | return ERR_BUF; |
screamer | 0:7a64fbb4069d | 718 | } |
screamer | 0:7a64fbb4069d | 719 | |
screamer | 0:7a64fbb4069d | 720 | iphdr = (struct ip_hdr *)p->payload; //static_cast<struct ip_hdr *>(x) |
screamer | 0:7a64fbb4069d | 721 | |
screamer | 0:7a64fbb4069d | 722 | /* Should the IP header be generated or is it already included in p? */ |
screamer | 0:7a64fbb4069d | 723 | if (dest != IP_HDRINCL) { |
screamer | 0:7a64fbb4069d | 724 | /** @todo should be shared with ip.c - ip_output_if */ |
screamer | 0:7a64fbb4069d | 725 | IPH_TTL_SET(iphdr, ttl); |
screamer | 0:7a64fbb4069d | 726 | IPH_PROTO_SET(iphdr, proto); |
screamer | 0:7a64fbb4069d | 727 | |
screamer | 0:7a64fbb4069d | 728 | ip_addr_set(&(iphdr->dest), dest); |
screamer | 0:7a64fbb4069d | 729 | |
screamer | 0:7a64fbb4069d | 730 | IPH_VHLTOS_SET(iphdr, 4, ((IP_HLEN + ROUTER_ALERTLEN) / 4), 0/*tos*/); |
screamer | 0:7a64fbb4069d | 731 | IPH_LEN_SET(iphdr, htons(p->tot_len)); |
screamer | 0:7a64fbb4069d | 732 | IPH_OFFSET_SET(iphdr, 0); |
screamer | 0:7a64fbb4069d | 733 | IPH_ID_SET(iphdr, htons(ip_id)); |
screamer | 0:7a64fbb4069d | 734 | ++ip_id; |
screamer | 0:7a64fbb4069d | 735 | |
screamer | 0:7a64fbb4069d | 736 | if (ip_addr_isany(src)) { |
screamer | 0:7a64fbb4069d | 737 | ip_addr_set(&(iphdr->src), &(netif->ip_addr)); |
screamer | 0:7a64fbb4069d | 738 | } else { |
screamer | 0:7a64fbb4069d | 739 | ip_addr_set(&(iphdr->src), src); |
screamer | 0:7a64fbb4069d | 740 | } |
screamer | 0:7a64fbb4069d | 741 | |
screamer | 0:7a64fbb4069d | 742 | IPH_CHKSUM_SET(iphdr, 0); |
screamer | 0:7a64fbb4069d | 743 | #if CHECKSUM_GEN_IP |
screamer | 0:7a64fbb4069d | 744 | IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, (IP_HLEN + ROUTER_ALERTLEN))); |
screamer | 0:7a64fbb4069d | 745 | #endif |
screamer | 0:7a64fbb4069d | 746 | } else { |
screamer | 0:7a64fbb4069d | 747 | dest = &(iphdr->dest); |
screamer | 0:7a64fbb4069d | 748 | } |
screamer | 0:7a64fbb4069d | 749 | |
screamer | 0:7a64fbb4069d | 750 | #if IP_DEBUG |
screamer | 0:7a64fbb4069d | 751 | ip_debug_print(p); |
screamer | 0:7a64fbb4069d | 752 | #endif |
screamer | 0:7a64fbb4069d | 753 | |
screamer | 0:7a64fbb4069d | 754 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: sending to if %p\n", netif)); |
screamer | 0:7a64fbb4069d | 755 | |
screamer | 0:7a64fbb4069d | 756 | return netif->output(netif, p, dest); |
screamer | 0:7a64fbb4069d | 757 | } |
screamer | 0:7a64fbb4069d | 758 | |
screamer | 0:7a64fbb4069d | 759 | /** |
screamer | 0:7a64fbb4069d | 760 | * Send an igmp packet to a specific group. |
screamer | 0:7a64fbb4069d | 761 | * |
screamer | 0:7a64fbb4069d | 762 | * @param group the group to which to send the packet |
screamer | 0:7a64fbb4069d | 763 | * @param type the type of igmp packet to send |
screamer | 0:7a64fbb4069d | 764 | */ |
screamer | 0:7a64fbb4069d | 765 | void |
screamer | 0:7a64fbb4069d | 766 | igmp_send(struct igmp_group *group, u8_t type) |
screamer | 0:7a64fbb4069d | 767 | { |
screamer | 0:7a64fbb4069d | 768 | struct pbuf* p = NULL; |
screamer | 0:7a64fbb4069d | 769 | struct igmp_msg* igmp = NULL; |
screamer | 0:7a64fbb4069d | 770 | struct ip_addr src = {0}; |
screamer | 0:7a64fbb4069d | 771 | struct ip_addr* dest = NULL; |
screamer | 0:7a64fbb4069d | 772 | |
screamer | 0:7a64fbb4069d | 773 | /* IP header + "router alert" option + IGMP header */ |
screamer | 0:7a64fbb4069d | 774 | p = pbuf_alloc(PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM); |
screamer | 0:7a64fbb4069d | 775 | |
screamer | 0:7a64fbb4069d | 776 | if (p) { |
screamer | 0:7a64fbb4069d | 777 | igmp = (struct igmp_msg *)p->payload; // static_cast<igmp_mgs *>(x) |
screamer | 0:7a64fbb4069d | 778 | LWIP_ASSERT("igmp_send: check that first pbuf can hold struct igmp_msg", |
screamer | 0:7a64fbb4069d | 779 | (p->len >= sizeof(struct igmp_msg))); |
screamer | 0:7a64fbb4069d | 780 | ip_addr_set(&src, &((group->interface)->ip_addr)); |
screamer | 0:7a64fbb4069d | 781 | |
screamer | 0:7a64fbb4069d | 782 | if (type == IGMP_V2_MEMB_REPORT) { |
screamer | 0:7a64fbb4069d | 783 | dest = &(group->group_address); |
screamer | 0:7a64fbb4069d | 784 | IGMP_STATS_INC(igmp.report_sent); |
screamer | 0:7a64fbb4069d | 785 | ip_addr_set(&(igmp->igmp_group_address), &(group->group_address)); |
screamer | 0:7a64fbb4069d | 786 | group->last_reporter_flag = 1; /* Remember we were the last to report */ |
screamer | 0:7a64fbb4069d | 787 | } else { |
screamer | 0:7a64fbb4069d | 788 | if (type == IGMP_LEAVE_GROUP) { |
screamer | 0:7a64fbb4069d | 789 | dest = &allrouters; |
screamer | 0:7a64fbb4069d | 790 | ip_addr_set(&(igmp->igmp_group_address), &(group->group_address)); |
screamer | 0:7a64fbb4069d | 791 | } |
screamer | 0:7a64fbb4069d | 792 | } |
screamer | 0:7a64fbb4069d | 793 | |
screamer | 0:7a64fbb4069d | 794 | if ((type == IGMP_V2_MEMB_REPORT) || (type == IGMP_LEAVE_GROUP)) { |
screamer | 0:7a64fbb4069d | 795 | igmp->igmp_msgtype = type; |
screamer | 0:7a64fbb4069d | 796 | igmp->igmp_maxresp = 0; |
screamer | 0:7a64fbb4069d | 797 | igmp->igmp_checksum = 0; |
screamer | 0:7a64fbb4069d | 798 | igmp->igmp_checksum = inet_chksum( igmp, IGMP_MINLEN); |
screamer | 0:7a64fbb4069d | 799 | |
screamer | 0:7a64fbb4069d | 800 | igmp_ip_output_if( p, &src, dest, IGMP_TTL, IP_PROTO_IGMP, group->interface); |
screamer | 0:7a64fbb4069d | 801 | } |
screamer | 0:7a64fbb4069d | 802 | |
screamer | 0:7a64fbb4069d | 803 | pbuf_free (p); |
screamer | 0:7a64fbb4069d | 804 | } else { |
screamer | 0:7a64fbb4069d | 805 | LWIP_DEBUGF(IGMP_DEBUG, ("igmp_send: not enough memory for igmp_send\n")); |
screamer | 0:7a64fbb4069d | 806 | } |
screamer | 0:7a64fbb4069d | 807 | } |
screamer | 0:7a64fbb4069d | 808 | |
screamer | 0:7a64fbb4069d | 809 | #endif /* LWIP_IGMP */ |