mirror of
https://github.com/lwip-tcpip/lwip.git
synced 2024-07-07 13:29:19 +00:00
Let lookup_group() call lookfor_group() to reduce code size, done some work on task #1549 (function documentation) and minor changes to meet coding standard
This commit is contained in:
goldsimon
parent
b7603f8600
commit
a185e19bc1
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@ -87,331 +87,410 @@ Steve Reynolds
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* Globales
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*----------------------------------------------------------------------------*/
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struct igmp_group* GroupList;
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struct igmp_group* group_list;
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struct igmp_stats igmpstats;
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struct ip_addr allsystems;
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struct ip_addr allrouters;
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/*-----------------------------------------------------------------------------
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* igmp_init
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*----------------------------------------------------------------------------*/
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void igmp_init(void)
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{ struct igmp_group* group;
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/**
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* Initialize this module
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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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void
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igmp_init(void)
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{
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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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IP4_ADDR (&allsystems, 224, 0, 0, 1);
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IP4_ADDR (&allrouters, 224, 0, 0, 2);
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GroupList = NULL;
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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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IP4_ADDR(&allsystems, 224, 0, 0, 1);
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IP4_ADDR(&allrouters, 224, 0, 0, 2);
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group_list = NULL;
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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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if (group)
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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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if (group) {
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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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}
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}
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/*-----------------------------------------------------------------------------
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* lookfor_group
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*----------------------------------------------------------------------------*/
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struct igmp_group * lookfor_group( struct netif *ifp, struct ip_addr *addr)
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{ struct igmp_group *group = GroupList;
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/**
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* Search for a group in the global 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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* @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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{
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struct igmp_group *group = group_list;
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while (group) {
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if ((group->interface == ifp) && (ip_addr_cmp(&(group->group_address), addr))) {
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return group;
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}
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group = group->next;
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}
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/* to be clearer, we return NULL here instead of
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* 'group' (which is also NULL at this point).
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*/
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return NULL;
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}
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/**
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* Search for a specific igmp group and create a new one if not found-
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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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* @return a struct igmp_group*,
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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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{
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struct igmp_group *group = group_list;
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while (group)
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{ if ((group->interface == ifp) && (ip_addr_cmp (&(group->group_address), addr)))
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{ return group;
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}
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group = group->next;
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}
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/* Search if the group already exists */
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group = 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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}
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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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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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group->group_state = NON_MEMBER;
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group->last_reporter_flag = 0;
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group->next = group_list;
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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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} 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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}
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return group;
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}
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/*-----------------------------------------------------------------------------
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* lookup_group
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*----------------------------------------------------------------------------*/
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struct igmp_group * lookup_group( struct netif *ifp, struct ip_addr *addr)
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{ struct igmp_group *group = GroupList;
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while (group)
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{ if ((group->interface == ifp) && (ip_addr_cmp (&(group->group_address), addr)))
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{ return group;
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}
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group = group->next;
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}
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group = mem_malloc (sizeof (struct igmp_group));
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if (group)
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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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group->group_state = NON_MEMBER;
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group->last_reporter_flag = 0;
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group->next = GroupList;
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GroupList = 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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}
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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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}
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return group;
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}
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/*-----------------------------------------------------------------------------
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* igmp_input
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*----------------------------------------------------------------------------*/
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void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest)
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{ struct ip_hdr * iphdr;
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/**
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* Called from ip_input() if a new IGMP packet is received.
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*
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* @param p received igmp packet, p->payload pointing to the ip header
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* @param inp network interface on which the packet was received
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* @param dest destination ip address of the igmp packet
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*/
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void
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igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest)
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{
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struct ip_hdr * iphdr;
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struct igmpmsg* igmp;
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struct igmp_group* group;
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struct igmp_group* groupref;
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iphdr = p->payload;
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igmp = (struct igmpmsg *)(((u8_t *)p->payload)+((u32_t)(IPH_HL(iphdr) * 4)));
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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 message to address %l \n", (long)dest->addr));
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if (p->len < IGMP_MINLEN)
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{ /* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */
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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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return;
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}
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if (p->len < IGMP_MINLEN) {
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/* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */
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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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return;
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}
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/* Now calculate and check the checksum */
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if (inet_chksum (igmp, IGMP_MINLEN /*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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return;
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}
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if (inet_chksum(igmp, IGMP_MINLEN /*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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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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group = lookup_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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return;
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}
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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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return;
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}
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/* NOW ACT ON THE INCOMING MESSAGE TYPE... */
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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)) && (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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if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && (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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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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}
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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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}
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igmpstats.igmp_group_query_rxed++;
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groupref = GroupList;
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while (groupref)
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{ if ((groupref->interface == inp) && (!(ip_addr_cmp (&(groupref->group_address), &allsystems))))
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{ /* Do not send messages on the all systems group address! */
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if ((groupref->group_state == IDLE_MEMBER) || ((groupref->group_state == DELAYING_MEMBER) && (igmp->igmp_maxresp > groupref->timer)))
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{ igmp_start_timer (groupref, (igmp->igmp_maxresp)/2);
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groupref->group_state = DELAYING_MEMBER;
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}
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}
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groupref = groupref->next;
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igmpstats.igmp_group_query_rxed++;
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groupref = group_list;
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while (groupref) {
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if ((groupref->interface == inp) &&
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(!(ip_addr_cmp(&(groupref->group_address), &allsystems)))) {
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/* Do not send messages on the all systems group address! */
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if ((groupref->group_state == IDLE_MEMBER) ||
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((groupref->group_state == DELAYING_MEMBER) &&
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(igmp->igmp_maxresp > groupref->timer))) {
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igmp_start_timer(groupref, (igmp->igmp_maxresp)/2);
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groupref->group_state = DELAYING_MEMBER;
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}
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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) && (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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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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(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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/* 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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/* 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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if ((IDLE_MEMBER == group->group_state ) || ((DELAYING_MEMBER == group->group_state ) && (igmp->igmp_maxresp > group->timer)))
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{ igmp_start_timer (group, (igmp->igmp_maxresp)/2);
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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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}
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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)) && (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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} else {
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if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && !(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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igmpstats.igmp_unicast_query++; /* This is the unicast query */
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if ((IDLE_MEMBER == group->group_state ) || ((DELAYING_MEMBER == group->group_state ) && (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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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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(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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igmpstats.report_rxed++;
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if (DELAYING_MEMBER == group->group_state) {
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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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}
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}
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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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igmpstats.report_rxed++;
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if (DELAYING_MEMBER == group->group_state )
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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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}
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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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}
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pbuf_free (p);
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}
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}
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pbuf_free(p);
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return;
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}
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/*-----------------------------------------------------------------------------
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* igmp_joingroup
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*----------------------------------------------------------------------------*/
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err_t igmp_joingroup( struct netif *ifp, struct ip_addr *groupaddr)
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{ struct igmp_group *group;
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group = lookup_group (ifp, groupaddr);
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/**
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* Join a group on one network interface.
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*
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* @param ifp the network interface which should join a new group
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* @param groupaddr the ip address of the group which to join
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* @return ERR_OK if group was joined, an err_t otherwise
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*/
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err_t
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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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if (group)
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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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return ERR_OK;
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}
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group = lookup_group(ifp, groupaddr);
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||||
/* OK - it was new group */
|
||||
igmpstats.igmp_joins++;
|
||||
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("igmp join to new group\n"));
|
||||
|
||||
if (ifp->igmp_mac_filter!=NULL)
|
||||
{ ifp->igmp_mac_filter( ifp, groupaddr, IGMP_ADD_MAC_FILTER);
|
||||
}
|
||||
|
||||
igmp_send( group, IGMP_V2_MEMB_REPORT);
|
||||
|
||||
igmp_start_timer( group, 5);
|
||||
|
||||
/* Need to work out where this timer comes from */
|
||||
group->group_state = DELAYING_MEMBER;
|
||||
|
||||
return ERR_OK;
|
||||
}
|
||||
|
||||
return ERR_MEM;
|
||||
}
|
||||
if (group) {
|
||||
/* This should create a new group, check the state to make sure */
|
||||
if (group->group_state != NON_MEMBER) {
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x join to group not in state NON_MEMBER\n", __LINE__));
|
||||
return ERR_OK;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
* igmp_leavegroup
|
||||
*----------------------------------------------------------------------------*/
|
||||
err_t igmp_leavegroup( struct netif *ifp, struct ip_addr *groupaddr)
|
||||
{ struct igmp_group *group;
|
||||
|
||||
group = lookup_group (ifp, groupaddr);
|
||||
/* OK - it was new group */
|
||||
igmpstats.igmp_joins++;
|
||||
|
||||
if (group)
|
||||
{ /* Only send a leave if the flag is set according to the state diagram */
|
||||
if (group->last_reporter_flag)
|
||||
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x Leaving group\n", __LINE__));
|
||||
igmpstats.igmp_leave_sent++;
|
||||
igmp_send( group, IGMP_LEAVE_GROUP);
|
||||
}
|
||||
|
||||
/* The block is not deleted since the group still exists and we may rejoin */
|
||||
group->last_reporter_flag = 0;
|
||||
group->group_state = NON_MEMBER;
|
||||
group->timer = 0;
|
||||
|
||||
if (ifp->igmp_mac_filter!=NULL)
|
||||
{ ifp->igmp_mac_filter( ifp, groupaddr, IGMP_DEL_MAC_FILTER);
|
||||
}
|
||||
|
||||
return ERR_OK;
|
||||
}
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("igmp join to new group\n"));
|
||||
|
||||
if (ifp->igmp_mac_filter != NULL) {
|
||||
ifp->igmp_mac_filter(ifp, groupaddr, IGMP_ADD_MAC_FILTER);
|
||||
}
|
||||
|
||||
igmp_send(group, IGMP_V2_MEMB_REPORT);
|
||||
|
||||
igmp_start_timer(group, 5);
|
||||
|
||||
/* Need to work out where this timer comes from */
|
||||
group->group_state = DELAYING_MEMBER;
|
||||
|
||||
return ERR_OK;
|
||||
}
|
||||
|
||||
return ERR_MEM;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
* igmp_tmr
|
||||
*----------------------------------------------------------------------------*/
|
||||
void igmp_tmr()
|
||||
{ struct igmp_group *group = GroupList;
|
||||
/**
|
||||
* Leave a group on one network interface.
|
||||
*
|
||||
* @param ifp the network interface which should leave a group
|
||||
* @param groupaddr the ip address of the group which to leave
|
||||
* @return ERR_OK if group was left, an err_t otherwise
|
||||
*/
|
||||
err_t
|
||||
igmp_leavegroup(struct netif *ifp, struct ip_addr *groupaddr)
|
||||
{
|
||||
struct igmp_group *group;
|
||||
|
||||
while (group)
|
||||
{ if (group->timer != 0)
|
||||
{ group->timer -=1;
|
||||
if (group->timer == 0)
|
||||
{ igmp_timeout (group);
|
||||
}
|
||||
}
|
||||
group = group->next;
|
||||
}
|
||||
group = lookup_group(ifp, groupaddr);
|
||||
|
||||
if (group) {
|
||||
/* Only send a leave if the flag is set according to the state diagram */
|
||||
if (group->last_reporter_flag) {
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x Leaving group\n", __LINE__));
|
||||
igmpstats.igmp_leave_sent++;
|
||||
igmp_send(group, IGMP_LEAVE_GROUP);
|
||||
}
|
||||
|
||||
/* The block is not deleted since the group still exists and we may rejoin */
|
||||
group->last_reporter_flag = 0;
|
||||
group->group_state = NON_MEMBER;
|
||||
group->timer = 0;
|
||||
|
||||
if (ifp->igmp_mac_filter != NULL) {
|
||||
ifp->igmp_mac_filter(ifp, groupaddr, IGMP_DEL_MAC_FILTER);
|
||||
}
|
||||
|
||||
return ERR_OK;
|
||||
}
|
||||
|
||||
return ERR_MEM;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
* igmp_timeout
|
||||
*----------------------------------------------------------------------------*/
|
||||
void igmp_timeout( struct igmp_group *group)
|
||||
{ /* If the state is DELAYING_MEMBER then we send a report for this group */
|
||||
/**
|
||||
* The igmp timer function (both for NO_SYS=1 and =0)
|
||||
* Should be called every IGMP_TMR_INTERVAL milliseconds (100 ms is default).
|
||||
*/
|
||||
void
|
||||
igmp_tmr()
|
||||
{
|
||||
struct igmp_group *group = group_list;
|
||||
|
||||
while (group) {
|
||||
if (group->timer != 0) {
|
||||
group->timer -= 1;
|
||||
if (group->timer == 0) {
|
||||
igmp_timeout(group);
|
||||
}
|
||||
}
|
||||
group = group->next;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Called if a timeout for one group is reached.
|
||||
* Sends a report for this group.
|
||||
*
|
||||
* @param group an igmp_group for which a timeout is reached
|
||||
*/
|
||||
void
|
||||
igmp_timeout(struct igmp_group *group)
|
||||
{
|
||||
/* If the state is DELAYING_MEMBER then we send a report for this group */
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c, got a timeout\n"));
|
||||
|
||||
if (DELAYING_MEMBER == group->group_state)
|
||||
{ igmp_send( group, IGMP_V2_MEMB_REPORT);
|
||||
}
|
||||
if (DELAYING_MEMBER == group->group_state) {
|
||||
igmp_send(group, IGMP_V2_MEMB_REPORT);
|
||||
}
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
* igmp_start_timer
|
||||
*----------------------------------------------------------------------------*/
|
||||
void igmp_start_timer( struct igmp_group *group, u8_t max_time)
|
||||
{ /* Important !! this should be random 0 -> max_time */
|
||||
/* find out how to do this */
|
||||
/**
|
||||
* Start a timer for an igmp group
|
||||
*
|
||||
* @param group the igmp_group for which to start a timer
|
||||
* @param max_time the time in multiples of IGMP_TMR_INTERVAL (decrease with
|
||||
* every call to igmp_tmr())
|
||||
*/
|
||||
void
|
||||
igmp_start_timer(struct igmp_group *group, u8_t max_time)
|
||||
{
|
||||
/* Important !! this should be random 0 -> max_time
|
||||
* find out how to do this
|
||||
*/
|
||||
group->timer = max_time;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
* igmp_stop_timer
|
||||
*----------------------------------------------------------------------------*/
|
||||
void igmp_stop_timer( struct igmp_group *group)
|
||||
{ group->timer = 0;
|
||||
/**
|
||||
* Stop a timer for an igmp_group
|
||||
*
|
||||
* @param group the igmp_group for which to stop the timer
|
||||
*/
|
||||
void
|
||||
igmp_stop_timer(struct igmp_group *group)
|
||||
{
|
||||
group->timer = 0;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
* igmp_ip_output_if
|
||||
/**
|
||||
* Sends an IP packet on a network interface. This function constructs the IP header
|
||||
* and calculates the IP header checksum. If the source IP address is NULL,
|
||||
* the IP address of the outgoing network interface is filled in as source address.
|
||||
*----------------------------------------------------------------------------*/
|
||||
err_t igmp_ip_output_if( struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, u8_t ttl, u8_t proto, struct netif *netif)
|
||||
{ static struct ip_hdr * iphdr = NULL;
|
||||
*
|
||||
* @param p the packet to send (p->payload points to the data, e.g. next
|
||||
protocol header; if dest == IP_HDRINCL, p already includes an IP
|
||||
header and p->payload points to that IP header)
|
||||
* @param src the source IP address to send from (if src == IP_ADDR_ANY, the
|
||||
* IP address of the netif used to send is used as source address)
|
||||
* @param dest the destination IP address to send the packet to
|
||||
* @param ttl the TTL value to be set in the IP header
|
||||
* @param proto the PROTOCOL to be set in the IP header
|
||||
* @param netif the netif on which to send this packet
|
||||
* @return ERR_OK if the packet was sent OK
|
||||
* ERR_BUF if p doesn't have enough space for IP/LINK headers
|
||||
* returns errors returned by netif->output
|
||||
*/
|
||||
err_t
|
||||
igmp_ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
|
||||
u8_t ttl, u8_t proto, struct netif *netif)
|
||||
{
|
||||
static struct ip_hdr * iphdr = NULL;
|
||||
static u16_t ip_id = 0;
|
||||
u16_t * ra = NULL;
|
||||
|
||||
/* First write in the "router alert" */
|
||||
if (pbuf_header (p, ROUTER_ALERTLEN))
|
||||
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n"));
|
||||
return ERR_BUF;
|
||||
}
|
||||
if (pbuf_header(p, ROUTER_ALERTLEN)) {
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n"));
|
||||
return ERR_BUF;
|
||||
}
|
||||
|
||||
/* This is the "router alert" option */
|
||||
ra = p->payload;
|
||||
|
|
@ -419,95 +498,97 @@ err_t igmp_ip_output_if( struct pbuf *p, struct ip_addr *src, struct ip_addr *de
|
|||
ra[1] = 0x0000;
|
||||
|
||||
/* now the normal ip header */
|
||||
if (pbuf_header (p, IP_HLEN))
|
||||
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n"));
|
||||
return ERR_BUF;
|
||||
}
|
||||
if (pbuf_header(p, IP_HLEN)) {
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n"));
|
||||
return ERR_BUF;
|
||||
}
|
||||
|
||||
iphdr = p->payload;
|
||||
if (dest != IP_HDRINCL)
|
||||
{ iphdr->_ttl_proto = (proto<<8);
|
||||
iphdr->_ttl_proto |= ttl;
|
||||
if (dest != IP_HDRINCL) {
|
||||
iphdr->_ttl_proto = (proto<<8);
|
||||
iphdr->_ttl_proto |= ttl;
|
||||
|
||||
/* iphdr->dest = dest->addr; */
|
||||
ip_addr_set (&(iphdr->dest), dest);
|
||||
/* iphdr->dest = dest->addr; */
|
||||
ip_addr_set(&(iphdr->dest), dest);
|
||||
#ifdef HAVE_BITFIELDS
|
||||
iphdr->_v_hl_tos |= ((IP_HLEN+ ROUTER_ALERTLEN)/4)<<16;
|
||||
iphdr->_v_hl_tos |= 4<<24;
|
||||
iphdr->_v_hl_tos |= ((IP_HLEN+ ROUTER_ALERTLEN)/4)<<16;
|
||||
iphdr->_v_hl_tos |= 4<<24;
|
||||
#else
|
||||
iphdr->_v_hl_tos = (4 << 4) | ((IP_HLEN + ROUTER_ALERTLEN)/ 4 & 0xf);
|
||||
iphdr->_v_hl_tos = (4 << 4) | ((IP_HLEN + ROUTER_ALERTLEN)/ 4 & 0xf);
|
||||
#endif /* HAVE_BITFIELDS */
|
||||
|
||||
iphdr->_v_hl_tos |= 0;
|
||||
iphdr->_len = htons (p->tot_len);
|
||||
iphdr->_offset = htons (0);
|
||||
iphdr->_id = htons (ip_id++);
|
||||
iphdr->_v_hl_tos |= 0;
|
||||
iphdr->_len = htons(p->tot_len);
|
||||
iphdr->_offset = htons(0);
|
||||
iphdr->_id = htons(ip_id++);
|
||||
|
||||
if (ip_addr_isany (src))
|
||||
{ ip_addr_set (&(iphdr->src), &(netif->ip_addr));
|
||||
}
|
||||
else
|
||||
{ ip_addr_set (&(iphdr->src), src);
|
||||
}
|
||||
if (ip_addr_isany(src)) {
|
||||
ip_addr_set(&(iphdr->src), &(netif->ip_addr));
|
||||
} else {
|
||||
ip_addr_set(&(iphdr->src), src);
|
||||
}
|
||||
|
||||
iphdr->_chksum = 0;
|
||||
iphdr->_chksum = inet_chksum (iphdr, IP_HLEN + ROUTER_ALERTLEN);
|
||||
}
|
||||
else
|
||||
{ dest = &(iphdr->dest);
|
||||
}
|
||||
iphdr->_chksum = 0;
|
||||
iphdr->_chksum = inet_chksum(iphdr, IP_HLEN + ROUTER_ALERTLEN);
|
||||
} else {
|
||||
dest = &(iphdr->dest);
|
||||
}
|
||||
|
||||
#if IP_DEBUG
|
||||
ip_debug_print (p);
|
||||
ip_debug_print(p);
|
||||
#endif
|
||||
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("IGMP sending to netif %x \n", (int) netif));
|
||||
|
||||
return netif->output (netif, p, dest);
|
||||
return netif->output(netif, p, dest);
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
* igmp_send
|
||||
*----------------------------------------------------------------------------*/
|
||||
void igmp_send( struct igmp_group *group, u8_t type)
|
||||
{ struct pbuf* p = NULL;
|
||||
/**
|
||||
* Send an igmp packet to a specific group.
|
||||
*
|
||||
* @param the group to which to send the packet
|
||||
* @param type the type of igmp packet to send
|
||||
*/
|
||||
void
|
||||
igmp_send(struct igmp_group *group, u8_t type)
|
||||
{
|
||||
struct pbuf* p = NULL;
|
||||
struct igmpmsg* igmp = NULL;
|
||||
struct ip_addr src = {0};
|
||||
struct ip_addr* dest = NULL;
|
||||
|
||||
/* IP header + IGMP header */
|
||||
p = pbuf_alloc( PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM);
|
||||
p = pbuf_alloc(PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM);
|
||||
|
||||
if (p)
|
||||
{ igmp = p->payload;
|
||||
ip_addr_set (&src, &((group->interface)->ip_addr));
|
||||
if (p) {
|
||||
igmp = p->payload;
|
||||
ip_addr_set(&src, &((group->interface)->ip_addr));
|
||||
|
||||
if (IGMP_V2_MEMB_REPORT == type)
|
||||
{ dest = &(group->group_address);
|
||||
igmpstats.report_sent++;
|
||||
ip_addr_set (&(igmp->igmp_group_address), &(group->group_address));
|
||||
group->last_reporter_flag = 1; /* Remember we were the last to report */
|
||||
}
|
||||
else
|
||||
if (IGMP_LEAVE_GROUP == type)
|
||||
{ dest = &allrouters;
|
||||
ip_addr_set (&(igmp->igmp_group_address), &(group->group_address));
|
||||
if (IGMP_V2_MEMB_REPORT == type) {
|
||||
dest = &(group->group_address);
|
||||
igmpstats.report_sent++;
|
||||
ip_addr_set(&(igmp->igmp_group_address), &(group->group_address));
|
||||
group->last_reporter_flag = 1; /* Remember we were the last to report */
|
||||
} else {
|
||||
if (IGMP_LEAVE_GROUP == type) {
|
||||
dest = &allrouters;
|
||||
ip_addr_set(&(igmp->igmp_group_address), &(group->group_address));
|
||||
}
|
||||
}
|
||||
|
||||
if ((IGMP_V2_MEMB_REPORT == type) || (IGMP_LEAVE_GROUP == type))
|
||||
{ igmp->igmp_msgtype = type;
|
||||
igmp->igmp_maxresp = 0;
|
||||
igmp->igmp_checksum = 0;
|
||||
igmp->igmp_checksum = inet_chksum( igmp, IGMP_MINLEN);
|
||||
|
||||
igmp_ip_output_if( p, &src, dest, IGMP_TTL, IP_PROTO_IGMP, group->interface);
|
||||
}
|
||||
|
||||
pbuf_free (p);
|
||||
}
|
||||
else
|
||||
{ LWIP_DEBUGF(IGMP_DEBUG, ("IGMP, not enough memory for igmp_send\n"));
|
||||
if ((IGMP_V2_MEMB_REPORT == type) || (IGMP_LEAVE_GROUP == type)) {
|
||||
igmp->igmp_msgtype = type;
|
||||
igmp->igmp_maxresp = 0;
|
||||
igmp->igmp_checksum = 0;
|
||||
igmp->igmp_checksum = inet_chksum( igmp, IGMP_MINLEN);
|
||||
|
||||
igmp_ip_output_if( p, &src, dest, IGMP_TTL, IP_PROTO_IGMP, group->interface);
|
||||
}
|
||||
|
||||
pbuf_free (p);
|
||||
} else {
|
||||
LWIP_DEBUGF(IGMP_DEBUG, ("IGMP, not enough memory for igmp_send\n"));
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* LWIP_IGMP */
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user