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igmp.h, igmp.c, ip.c: Fix minor changes from bug #20503 : IGMP Improvement. This is mainly on using lookup/lookfor, and some coding styles...
This commit is contained in:
fbernon
parent
11c94b6566
commit
7c104c8fbb
@ -256,6 +256,10 @@ HISTORY
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++ Bug fixes:
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2007-08-09 Frédéric Bernon, Bill Florac
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* igmp.h, igmp.c, ip.c: Fix minor changes from bug #20503 : IGMP Improvement.
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This is mainly on using lookup/lookfor, and some coding styles...
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2007-07-26 Frédéric Bernon (and "thedoctor")
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* igmp.c: Fix bug #20595 to accept IGMPv3 "Query" messages.
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@ -1,3 +1,9 @@
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/**
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* @file
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*
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* IGMP - Internet Group Management Protocol
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*/
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/*
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* Copyright (c) 2002 CITEL Technologies Ltd.
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* All rights reserved.
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@ -60,6 +66,16 @@ but not checked rigorously incoming
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Steve Reynolds
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------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------
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* RFC 988 - Host extensions for IP multicasting - V0
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* RFC 1054 - Host extensions for IP multicasting -
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* RFC 1112 - Host extensions for IP multicasting - V1
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* RFC 2236 - Internet Group Management Protocol, Version 2 - V2 <- this code is based on this RFC (it's the "de facto" standard)
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* RFC 3376 - Internet Group Management Protocol, Version 3 - V3
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* RFC 4604 - Using Internet Group Management Protocol Version 3... - V3+
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* RFC 2113 - IP Router Alert Option -
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*----------------------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------
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* Includes
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*----------------------------------------------------------------------------*/
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@ -88,7 +104,7 @@ Steve Reynolds
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*----------------------------------------------------------------------------*/
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static struct igmp_group* igmp_group_list;
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static struct igmp_stats igmpstats;
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static struct igmp_stats igmpstats; /** @todo: Should we have stats per netif? */
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static struct ip_addr allsystems;
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static struct ip_addr allrouters;
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@ -98,6 +114,9 @@ static struct ip_addr allrouters;
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*
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* Only network interfaces registered when this function is called
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* are igmp-enabled.
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*
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* This will enable igmp on all interface. In the current implementation it
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* is not possible to have igmp on one interface but not the other.
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*/
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void
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igmp_init(void)
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@ -105,24 +124,25 @@ igmp_init(void)
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struct igmp_group* group;
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struct netif* netif;
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LWIP_DEBUGF(IGMP_DEBUG, ("IGMP Initialising\n"));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_init: initializing\n"));
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IP4_ADDR(&allsystems, 224, 0, 0, 1);
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IP4_ADDR(&allrouters, 224, 0, 0, 2);
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igmp_group_list = NULL;
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/* Clear stats*/
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memset(&igmpstats, 0, sizeof(igmpstats));
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for (netif = netif_list; netif != NULL; netif = netif->next) {
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group = lookup_group(netif, &allsystems);
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group = igmp_lookup_group(netif, &allsystems);
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if (group) {
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if (group != NULL) {
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group->group_state = IDLE_MEMBER;
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/* Allow the igmp messages at the MAC level */
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if (netif->igmp_mac_filter != NULL) {
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netif->igmp_mac_filter(netif, &allsystems, IGMP_ADD_MAC_FILTER);
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netif->igmp_mac_filter(netif, &allrouters, IGMP_ADD_MAC_FILTER);
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}
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}
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}
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@ -131,13 +151,13 @@ igmp_init(void)
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/**
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* Search for a group in the global igmp_group_list
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*
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* @param ifp the network interfacefor which to look
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* @param addr the group ip address to search
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* @param ifp the network interface for which to look
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* @param addr the group ip address to search for
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* @return a struct igmp_group* if the group has been found,
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* NULL if the group wasn't found.
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*/
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struct igmp_group *
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lookfor_group(struct netif *ifp, struct ip_addr *addr)
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igmp_lookfor_group(struct netif *ifp, struct ip_addr *addr)
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{
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struct igmp_group *group = igmp_group_list;
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@ -163,12 +183,12 @@ lookfor_group(struct netif *ifp, struct ip_addr *addr)
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* NULL on memory error.
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*/
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struct igmp_group *
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lookup_group(struct netif *ifp, struct ip_addr *addr)
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igmp_lookup_group(struct netif *ifp, struct ip_addr *addr)
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{
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struct igmp_group *group = igmp_group_list;
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/* Search if the group already exists */
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group = lookfor_group(ifp, addr);
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group = igmp_lookfor_group(ifp, addr);
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if (group != NULL) {
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/* Group already exists. */
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return group;
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@ -176,7 +196,7 @@ lookup_group(struct netif *ifp, struct ip_addr *addr)
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/* Group doesn't exist yet, create a new one. */
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group = mem_malloc(sizeof(struct igmp_group));
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if (group) {
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if (group != NULL) {
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group->interface = ifp;
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ip_addr_set(&(group->group_address), addr);
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group->timer = 0; /* Not running */
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@ -186,9 +206,9 @@ lookup_group(struct netif *ifp, struct ip_addr *addr)
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igmp_group_list = group;
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d allocated a new group with address %x on if %x \n", __LINE__, (int) addr, (int) ifp));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_lookup_group: allocated a new group with address %x on if %x \n", (int) addr, (int) ifp));
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} else {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d impossible to allocated a new group with address %x on if %x \n", __LINE__, (int) addr, (int) ifp));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_lookup_group: impossible to allocated a new group with address %x on if %x \n", (int) addr, (int) ifp));
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}
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return group;
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@ -214,28 +234,28 @@ igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest)
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if (pbuf_header(p, -(IPH_HL(iphdr) * 4)) || (p->len < IGMP_MINLEN)) {
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pbuf_free(p);
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igmpstats.igmp_length_err++;
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x igmp length error\n", __LINE__));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: length error\n"));
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return;
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}
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp message to address %l \n", (long)dest->addr));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: message to address %l \n", (long)dest->addr));
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/* Now calculate and check the checksum */
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igmp = (struct igmpmsg *)p->payload;
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if (inet_chksum(igmp, p->len)) {
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pbuf_free(p);
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igmpstats.igmp_checksum_err++;
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d igmp checksum error\n", __LINE__));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: checksum error\n"));
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return;
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}
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/* Packet is ok so find the group (or create a new one) */
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group = lookup_group(inp, dest); /* use the incoming IP address! */
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/* Packet is ok so find an existing group */
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group = igmp_lookfor_group(inp, dest); /* use the incoming IP address! */
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/* If group can be found or create... */
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if (!group) {
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pbuf_free(p);
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d igmp allocation error\n", __LINE__));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP frame not for us\n"));
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return;
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}
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@ -243,15 +263,15 @@ igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest)
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/* The membership query message goes to the all groups address */
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/* and it control block does not have state */
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if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && (ip_addr_cmp(dest, &allsystems)) &&
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if ((igmp->igmp_msgtype == IGMP_MEMB_QUERY) && (ip_addr_cmp(dest, &allsystems)) &&
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(igmp->igmp_group_address.addr == 0)) {
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/* THIS IS THE GENERAL QUERY */
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LWIP_DEBUGF(IGMP_DEBUG, ("General IGMP_MEMB_QUERY on ALL SYSTEMS ADDRESS 224.0.0.1\n"));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: General IGMP_MEMB_QUERY on ALL SYSTEMS ADDRESS 224.0.0.1\n"));
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if (0 ==igmp->igmp_maxresp) {
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igmpstats.igmp_v1_rxed++;
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igmp->igmp_maxresp = 10;
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d got an all hosts query with time== 0 - this is V1 and not implemented - treat as v2\n", __LINE__));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: got an all hosts query with time== 0 - this is V1 and not implemented - treat as v2\n"));
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}
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igmpstats.igmp_group_query_rxed++;
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@ -270,43 +290,45 @@ igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest)
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groupref = groupref->next;
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}
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} else {
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if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && ip_addr_cmp (dest, &allsystems) &&
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if ((igmp->igmp_msgtype == IGMP_MEMB_QUERY) && ip_addr_cmp (dest, &allsystems) &&
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(group->group_address.addr != 0)) {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got a query to a specific group using the allsystems address \n", __LINE__));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: got a query to a specific group using the allsystems address \n"));
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/* we first need to re-lookup the group since we used dest last time */
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group = lookup_group(inp, &igmp->igmp_group_address); /* use the incoming IP address! */
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igmpstats.igmp_unicast_query++;
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group = igmp_lookfor_group(inp, &igmp->igmp_group_address); /* use the incoming IP address! */
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if (group != NULL) {
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igmpstats.igmp_unicast_query++;
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if ((IDLE_MEMBER == group->group_state ) || ((DELAYING_MEMBER == group->group_state) &&
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(igmp->igmp_maxresp > group->timer))) {
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igmp_start_timer(group, (igmp->igmp_maxresp)/2);
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group->group_state = DELAYING_MEMBER;
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if ((group->group_state == IDLE_MEMBER) || ((group->group_state == DELAYING_MEMBER) &&
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(igmp->igmp_maxresp > group->timer))) {
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igmp_start_timer(group, (igmp->igmp_maxresp)/2);
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group->group_state = DELAYING_MEMBER;
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}
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}
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} else {
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if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && !(ip_addr_cmp (dest, &allsystems)) &&
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if ((igmp->igmp_msgtype == IGMP_MEMB_QUERY) && !(ip_addr_cmp (dest, &allsystems)) &&
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(group->group_address.addr != 0)) {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got a query to a specific group with the group address as destination \n", __LINE__));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: got a query to a specific group with the group address as destination \n"));
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igmpstats.igmp_unicast_query++; /* This is the unicast query */
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if ((IDLE_MEMBER == group->group_state) || ((DELAYING_MEMBER == group->group_state) &&
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if ((group->group_state == IDLE_MEMBER) || ((group->group_state == DELAYING_MEMBER) &&
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(igmp->igmp_maxresp > group->timer))) {
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igmp_start_timer(group, (igmp->igmp_maxresp)/2);
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group->group_state = DELAYING_MEMBER;
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}
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} else {
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if (IGMP_V2_MEMB_REPORT == igmp->igmp_msgtype) {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got an IGMP_V2_MEMB_REPORT \n", __LINE__));
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if (igmp->igmp_msgtype == IGMP_V2_MEMB_REPORT) {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: got an IGMP_V2_MEMB_REPORT \n"));
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igmpstats.report_rxed++;
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if (DELAYING_MEMBER == group->group_state) {
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if (group->group_state == DELAYING_MEMBER) {
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/* This is on a specific group we have already looked up */
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group->timer = 0; /* stopped */
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group->group_state = IDLE_MEMBER;
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group->last_reporter_flag = 0;
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}
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} else {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input, Line %x unexpected msg %x in state %x on group %x at interface %x\n", __LINE__, (int) igmp->igmp_msgtype, (int) group->group_state, (int) &group, (int) group->interface));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: unexpected msg %x in state %x on group %x at interface %x\n", (int) igmp->igmp_msgtype, (int) group->group_state, (int) &group, (int) group->interface));
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}
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}
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}
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@ -327,19 +349,28 @@ igmp_joingroup(struct netif *ifp, struct ip_addr *groupaddr)
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{
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struct igmp_group *group;
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group = lookup_group(ifp, groupaddr);
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/* make sure it is multicast address */
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if (!ip_addr_ismulticast(groupaddr)) {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: attempt to join non-multicast address\n"));
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return ERR_VAL;
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}
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if (group) {
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/* find group or create a new one if not found */
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group = igmp_lookup_group(ifp, groupaddr);
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if (group != NULL) {
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/* This should create a new group, check the state to make sure */
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if (group->group_state != NON_MEMBER) {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x join to group not in state NON_MEMBER\n", __LINE__));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: join to group not in state NON_MEMBER\n"));
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return ERR_OK;
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}
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/* OK - it was new group */
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igmpstats.igmp_joins++;
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp join to new group\n"));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: join to new group: "));
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ip_addr_debug_print(IGMP_DEBUG, groupaddr);
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LWIP_DEBUGF(IGMP_DEBUG, ("\n"));
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if (ifp->igmp_mac_filter != NULL) {
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ifp->igmp_mac_filter(ifp, groupaddr, IGMP_ADD_MAC_FILTER);
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@ -370,12 +401,16 @@ igmp_leavegroup(struct netif *ifp, struct ip_addr *groupaddr)
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{
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struct igmp_group *group;
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group = lookup_group(ifp, groupaddr);
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group = igmp_lookfor_group(ifp, groupaddr);
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if (group) {
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if (group != NULL) {
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/* Only send a leave if the flag is set according to the state diagram */
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: Leaving group: "));
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ip_addr_debug_print(IGMP_DEBUG, groupaddr);
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LWIP_DEBUGF(IGMP_DEBUG, ("\n"));
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if (group->last_reporter_flag) {
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x Leaving group\n", __LINE__));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: sending leaving group"));
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igmpstats.igmp_leave_sent++;
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igmp_send(group, IGMP_LEAVE_GROUP);
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}
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@ -392,7 +427,9 @@ igmp_leavegroup(struct netif *ifp, struct ip_addr *groupaddr)
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return ERR_OK;
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}
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return ERR_MEM;
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: not member of group"));
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return ERR_VAL;
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}
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/**
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@ -400,11 +437,11 @@ igmp_leavegroup(struct netif *ifp, struct ip_addr *groupaddr)
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* Should be called every IGMP_TMR_INTERVAL milliseconds (100 ms is default).
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*/
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void
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igmp_tmr()
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igmp_tmr(void)
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{
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struct igmp_group *group = igmp_group_list;
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while (group) {
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while (group != NULL) {
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if (group->timer != 0) {
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group->timer -= 1;
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if (group->timer == 0) {
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@ -425,9 +462,9 @@ void
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igmp_timeout(struct igmp_group *group)
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{
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/* If the state is DELAYING_MEMBER then we send a report for this group */
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c, got a timeout\n"));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_timeout: got a timeout\n"));
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if (DELAYING_MEMBER == group->group_state) {
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if (group->group_state == DELAYING_MEMBER) {
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igmp_send(group, IGMP_V2_MEMB_REPORT);
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}
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}
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@ -537,7 +574,7 @@ igmp_ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
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ip_debug_print(p);
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#endif
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LWIP_DEBUGF(IGMP_DEBUG, ("IGMP sending to netif %x \n", (int) netif));
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LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: sending to netif %x \n", (int) netif));
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return netif->output(netif, p, dest);
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}
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@ -561,23 +598,23 @@ igmp_send(struct igmp_group *group, u8_t type)
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if (p) {
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igmp = p->payload;
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LWIP_ASSERT("check that first pbuf can hold struct igmpmsg",
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LWIP_ASSERT("igmp_send: check that first pbuf can hold struct igmpmsg",
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(p->len >= sizeof(struct igmpmsg)));
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ip_addr_set(&src, &((group->interface)->ip_addr));
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if (IGMP_V2_MEMB_REPORT == type) {
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if (type == IGMP_V2_MEMB_REPORT) {
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dest = &(group->group_address);
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igmpstats.report_sent++;
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ip_addr_set(&(igmp->igmp_group_address), &(group->group_address));
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group->last_reporter_flag = 1; /* Remember we were the last to report */
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} else {
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if (IGMP_LEAVE_GROUP == type) {
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if (type == IGMP_LEAVE_GROUP) {
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dest = &allrouters;
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ip_addr_set(&(igmp->igmp_group_address), &(group->group_address));
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}
|
||||
}
|
||||
|
||||
if ((IGMP_V2_MEMB_REPORT == type) || (IGMP_LEAVE_GROUP == type)) {
|
||||
if ((type == IGMP_V2_MEMB_REPORT) || (type == IGMP_LEAVE_GROUP)) {
|
||||
igmp->igmp_msgtype = type;
|
||||
igmp->igmp_maxresp = 0;
|
||||
igmp->igmp_checksum = 0;
|
||||
@ -588,7 +625,7 @@ igmp_send(struct igmp_group *group, u8_t type)
|
||||
|
||||
pbuf_free (p);
|
||||
} else {
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("IGMP, not enough memory for igmp_send\n"));
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_send: not enough memory for igmp_send\n"));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -243,7 +243,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
|
||||
/* match packet against an interface, i.e. is this packet for us? */
|
||||
#if LWIP_IGMP
|
||||
if (ip_addr_ismulticast(&(iphdr->dest)))
|
||||
{ if (lookfor_group( inp, &(iphdr->dest)))
|
||||
{ if (igmp_lookfor_group( inp, &(iphdr->dest)))
|
||||
{ netif = inp;
|
||||
}
|
||||
else
|
||||
@ -252,7 +252,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
|
||||
}
|
||||
else
|
||||
{
|
||||
#endif
|
||||
#endif /* LWIP_IGMP */
|
||||
for (netif = netif_list; netif != NULL; netif = netif->next) {
|
||||
|
||||
LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest 0x%"X32_F" netif->ip_addr 0x%"X32_F" (0x%"X32_F", 0x%"X32_F", 0x%"X32_F")\n",
|
||||
@ -277,7 +277,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
|
||||
}
|
||||
#if LWIP_IGMP
|
||||
}
|
||||
#endif
|
||||
#endif /* LWIP_IGMP */
|
||||
|
||||
#if LWIP_DHCP
|
||||
/* Pass DHCP messages regardless of destination address. DHCP traffic is addressed
|
||||
@ -346,7 +346,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
|
||||
if((iphdrlen > IP_HLEN && (IPH_PROTO(iphdr) != IP_PROTO_IGMP)) {
|
||||
#else
|
||||
if (iphdrlen > IP_HLEN) {
|
||||
#endif
|
||||
#endif /* LWIP_IGMP */
|
||||
LWIP_DEBUGF(IP_DEBUG | 2, ("IP packet dropped since there were IP options (while IP_OPTIONS == 0).\n"));
|
||||
pbuf_free(p);
|
||||
IP_STATS_INC(ip.opterr);
|
||||
@ -391,7 +391,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
|
||||
case IP_PROTO_IGMP:
|
||||
igmp_input(p,inp,&(iphdr->dest));
|
||||
break;
|
||||
#endif
|
||||
#endif /* LWIP_IGMP */
|
||||
default:
|
||||
/* send ICMP destination protocol unreachable unless is was a broadcast */
|
||||
if (!ip_addr_isbroadcast(&(iphdr->dest), inp) &&
|
||||
|
||||
@ -32,8 +32,8 @@
|
||||
* source code.
|
||||
*/
|
||||
|
||||
#ifndef IGMPH
|
||||
#define IGMPH
|
||||
#ifndef __LWIP_IGMP_H__
|
||||
#define __LWIP_IGMP_H__
|
||||
|
||||
#include "lwip/opt.h"
|
||||
|
||||
@ -57,10 +57,13 @@ struct igmpmsg {
|
||||
struct ip_addr igmp_group_address;
|
||||
};
|
||||
|
||||
#define MCAST224 224
|
||||
#define ALLROUTERS_GROUP 224,0,0,2
|
||||
|
||||
/*
|
||||
* IGMP constants
|
||||
*/
|
||||
#define IP_PROTO_IGMP 2
|
||||
#define IGMP_TTL 1
|
||||
#define IGMP_MINLEN 8
|
||||
#define ROUTER_ALERTLEN 4
|
||||
|
||||
/*
|
||||
* Message types, including version number.
|
||||
@ -82,11 +85,6 @@ struct igmpmsg {
|
||||
#define DELAYING_MEMBER 1
|
||||
#define IDLE_MEMBER 2
|
||||
|
||||
/* Put this is another place when integrated */
|
||||
#define IP_PROTO_IGMP 2
|
||||
#define IGMP_TTL 1
|
||||
#define ROUTER_ALERTLEN 4
|
||||
|
||||
/*
|
||||
* now a group structure - there is
|
||||
* a list of groups for each interface
|
||||
@ -127,9 +125,9 @@ struct igmp_stats{
|
||||
/* Prototypes */
|
||||
void igmp_init(void);
|
||||
|
||||
struct igmp_group *lookfor_group(struct netif *ifp, struct ip_addr *addr);
|
||||
struct igmp_group *igmp_lookfor_group(struct netif *ifp, struct ip_addr *addr);
|
||||
|
||||
struct igmp_group *lookup_group(struct netif *ifp, struct ip_addr *addr);
|
||||
struct igmp_group *igmp_lookup_group(struct netif *ifp, struct ip_addr *addr);
|
||||
|
||||
void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest);
|
||||
|
||||
@ -137,7 +135,7 @@ err_t igmp_joingroup( struct netif* ifp, struct ip_addr *groupaddr);
|
||||
|
||||
err_t igmp_leavegroup( struct netif* ifp, struct ip_addr *groupaddr);
|
||||
|
||||
void igmp_tmr();
|
||||
void igmp_tmr(void);
|
||||
|
||||
void igmp_timeout( struct igmp_group *group);
|
||||
|
||||
@ -155,4 +153,4 @@ void igmp_send( struct igmp_group *group, u8_t type);
|
||||
|
||||
#endif /* LWIP_IGMP */
|
||||
|
||||
#endif /* IGMPH */
|
||||
#endif /* __LWIP_IGMP_H__ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user