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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

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This commit is contained in:
goldsimon 2007-06-08 12:54:40 +00:00
parent b7603f8600
commit a185e19bc1
1 changed files with 395 additions and 314 deletions
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423
src/core/ipv4/igmp.c
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@ -87,17 +87,22 @@ Steve Reynolds
* Globales * Globales
*----------------------------------------------------------------------------*/ *----------------------------------------------------------------------------*/
struct igmp_group* GroupList; struct igmp_group* group_list;
struct igmp_stats igmpstats; struct igmp_stats igmpstats;
struct ip_addr allsystems; struct ip_addr allsystems;
struct ip_addr allrouters; struct ip_addr allrouters;
/*----------------------------------------------------------------------------- /**
* igmp_init * Initialize this module
*----------------------------------------------------------------------------*/ *
void igmp_init(void) * Only network interfaces registered when this function is called
{ struct igmp_group* group; * are igmp-enabled.
*/
void
igmp_init(void)
{
struct igmp_group* group;
struct netif* netif; struct netif* netif;
LWIP_DEBUGF(IGMP_DEBUG, ("IGMP Initialising\n")); LWIP_DEBUGF(IGMP_DEBUG, ("IGMP Initialising\n"));
@ -105,79 +110,101 @@ void igmp_init(void)
IP4_ADDR(&allsystems, 224, 0, 0, 1); IP4_ADDR(&allsystems, 224, 0, 0, 1);
IP4_ADDR(&allrouters, 224, 0, 0, 2); IP4_ADDR(&allrouters, 224, 0, 0, 2);
GroupList = NULL; group_list = NULL;
memset(&igmpstats, 0, sizeof(igmpstats)); memset(&igmpstats, 0, sizeof(igmpstats));
for( netif = netif_list; netif != NULL; netif = netif->next) for (netif = netif_list; netif != NULL; netif = netif->next) {
{ group = lookup_group (netif, &allsystems); group = lookup_group(netif, &allsystems);
if (group) if (group) {
{ group->group_state = IDLE_MEMBER; group->group_state = IDLE_MEMBER;
/* Allow the igmp messages at the MAC level */ /* Allow the igmp messages at the MAC level */
if (netif->igmp_mac_filter!=NULL) if (netif->igmp_mac_filter != NULL) {
{ netif->igmp_mac_filter( netif, &allsystems, IGMP_ADD_MAC_FILTER); netif->igmp_mac_filter(netif, &allsystems, IGMP_ADD_MAC_FILTER);
netif->igmp_mac_filter(netif, &allrouters, IGMP_ADD_MAC_FILTER); netif->igmp_mac_filter(netif, &allrouters, IGMP_ADD_MAC_FILTER);
} }
} }
} }
} }
/*----------------------------------------------------------------------------- /**
* lookfor_group * Search for a group in the global group_list
*----------------------------------------------------------------------------*/ *
struct igmp_group * lookfor_group( struct netif *ifp, struct ip_addr *addr) * @param ifp the network interfacefor which to look
{ struct igmp_group *group = GroupList; * @param addr the group ip address to search
* @return a struct igmp_group* if the group has been found,
* NULL if the group wasn't found.
*/
struct igmp_group *
lookfor_group(struct netif *ifp, struct ip_addr *addr)
{
struct igmp_group *group = group_list;
while (group) while (group) {
{ if ((group->interface == ifp) && (ip_addr_cmp (&(group->group_address), addr))) if ((group->interface == ifp) && (ip_addr_cmp(&(group->group_address), addr))) {
{ return group; return group;
} }
group = group->next; group = group->next;
} }
/* to be clearer, we return NULL here instead of
* 'group' (which is also NULL at this point).
*/
return NULL;
}
/**
* Search for a specific igmp group and create a new one if not found-
*
* @param ifp the network interfacefor which to look
* @param addr the group ip address to search
* @return a struct igmp_group*,
* NULL on memory error.
*/
struct igmp_group *
lookup_group(struct netif *ifp, struct ip_addr *addr)
{
struct igmp_group *group = group_list;
/* Search if the group already exists */
group = lookfor_group(ifp, addr);
if (group != NULL) {
/* Group already exists. */
return group; return group;
} }
/*----------------------------------------------------------------------------- /* Group doesn't exist yet, create a new one. */
* lookup_group
*----------------------------------------------------------------------------*/
struct igmp_group * lookup_group( struct netif *ifp, struct ip_addr *addr)
{ struct igmp_group *group = GroupList;
while (group)
{ if ((group->interface == ifp) && (ip_addr_cmp (&(group->group_address), addr)))
{ return group;
}
group = group->next;
}
group = mem_malloc(sizeof(struct igmp_group)); group = mem_malloc(sizeof(struct igmp_group));
if (group) {
if (group) group->interface = ifp;
{ group->interface = ifp;
ip_addr_set(&(group->group_address), addr); ip_addr_set(&(group->group_address), addr);
group->timer = 0; /* Not running */ group->timer = 0; /* Not running */
group->group_state = NON_MEMBER; group->group_state = NON_MEMBER;
group->last_reporter_flag = 0; group->last_reporter_flag = 0;
group->next = GroupList; group->next = group_list;
GroupList = group; group_list = group;
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d allocated a new group with address %x on if %x \n", __LINE__, (int) addr, (int) ifp)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d allocated a new group with address %x on if %x \n", __LINE__, (int) addr, (int) ifp));
} } else {
else 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));
{ 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));
} }
return group; return group;
} }
/*----------------------------------------------------------------------------- /**
* igmp_input * Called from ip_input() if a new IGMP packet is received.
*----------------------------------------------------------------------------*/ *
void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest) * @param p received igmp packet, p->payload pointing to the ip header
{ struct ip_hdr * iphdr; * @param inp network interface on which the packet was received
* @param dest destination ip address of the igmp packet
*/
void
igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest)
{
struct ip_hdr * iphdr;
struct igmpmsg* igmp; struct igmpmsg* igmp;
struct igmp_group* group; struct igmp_group* group;
struct igmp_group* groupref; struct igmp_group* groupref;
@ -187,8 +214,8 @@ void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest)
LWIP_DEBUGF(IGMP_DEBUG, ("igmp message to address %l \n", (long)dest->addr)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp message to address %l \n", (long)dest->addr));
if (p->len < IGMP_MINLEN) if (p->len < IGMP_MINLEN) {
{ /* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */ /* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */
pbuf_free(p); pbuf_free(p);
igmpstats.igmp_length_err++; igmpstats.igmp_length_err++;
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x igmp length error\n", __LINE__)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x igmp length error\n", __LINE__));
@ -196,8 +223,8 @@ void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest)
} }
/* Now calculate and check the checksum */ /* Now calculate and check the checksum */
if (inet_chksum (igmp, IGMP_MINLEN /*p->len*/)) if (inet_chksum(igmp, IGMP_MINLEN /*p->len*/)) {
{ pbuf_free (p); pbuf_free(p);
igmpstats.igmp_checksum_err++; igmpstats.igmp_checksum_err++;
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d igmp checksum error\n", __LINE__)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d igmp checksum error\n", __LINE__));
return; return;
@ -207,8 +234,8 @@ void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest)
group = lookup_group(inp, dest); /* use the incoming IP address! */ group = lookup_group(inp, dest); /* use the incoming IP address! */
/* If group can be found or create... */ /* If group can be found or create... */
if (!group) if (!group) {
{ pbuf_free (p); pbuf_free(p);
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d igmp allocation error\n", __LINE__)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d igmp allocation error\n", __LINE__));
return; return;
} }
@ -217,84 +244,96 @@ void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest)
/* The membership query message goes to the all groups address */ /* The membership query message goes to the all groups address */
/* and it control block does not have state */ /* and it control block does not have state */
if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && (ip_addr_cmp (dest, &allsystems)) && (igmp->igmp_group_address.addr == 0)) if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && (ip_addr_cmp(dest, &allsystems)) &&
{ /* THIS IS THE GENERAL QUERY */ (igmp->igmp_group_address.addr == 0)) {
/* THIS IS THE GENERAL QUERY */
LWIP_DEBUGF(IGMP_DEBUG, ("General IGMP_MEMB_QUERY on ALL SYSTEMS ADDRESS 224.0.0.1\n")); LWIP_DEBUGF(IGMP_DEBUG, ("General IGMP_MEMB_QUERY on ALL SYSTEMS ADDRESS 224.0.0.1\n"));
if (0 ==igmp->igmp_maxresp ) if (0 ==igmp->igmp_maxresp) {
{ igmpstats.igmp_v1_rxed++; igmpstats.igmp_v1_rxed++;
igmp->igmp_maxresp = 10; igmp->igmp_maxresp = 10;
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__)); 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__));
} }
igmpstats.igmp_group_query_rxed++; igmpstats.igmp_group_query_rxed++;
groupref = GroupList; groupref = group_list;
while (groupref) while (groupref) {
{ if ((groupref->interface == inp) && (!(ip_addr_cmp (&(groupref->group_address), &allsystems)))) if ((groupref->interface == inp) &&
{ /* Do not send messages on the all systems group address! */ (!(ip_addr_cmp(&(groupref->group_address), &allsystems)))) {
if ((groupref->group_state == IDLE_MEMBER) || ((groupref->group_state == DELAYING_MEMBER) && (igmp->igmp_maxresp > groupref->timer))) /* Do not send messages on the all systems group address! */
{ igmp_start_timer (groupref, (igmp->igmp_maxresp)/2); if ((groupref->group_state == IDLE_MEMBER) ||
((groupref->group_state == DELAYING_MEMBER) &&
(igmp->igmp_maxresp > groupref->timer))) {
igmp_start_timer(groupref, (igmp->igmp_maxresp)/2);
groupref->group_state = DELAYING_MEMBER; groupref->group_state = DELAYING_MEMBER;
} }
} }
groupref = groupref->next; groupref = groupref->next;
} }
} } else {
else if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && ip_addr_cmp (dest, &allsystems) &&
if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && ip_addr_cmp (dest, &allsystems) && (group->group_address.addr != 0)) (group->group_address.addr != 0)) {
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got a query to a specific group using the allsystems address \n", __LINE__)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got a query to a specific group using the allsystems address \n", __LINE__));
/* we first need to re-lookup the group since we used dest last time */ /* we first need to re-lookup the group since we used dest last time */
group = lookup_group(inp, &igmp->igmp_group_address); /* use the incoming IP address! */ group = lookup_group(inp, &igmp->igmp_group_address); /* use the incoming IP address! */
igmpstats.igmp_unicast_query++; igmpstats.igmp_unicast_query++;
if ((IDLE_MEMBER == group->group_state ) || ((DELAYING_MEMBER == group->group_state ) && (igmp->igmp_maxresp > group->timer))) if ((IDLE_MEMBER == group->group_state ) || ((DELAYING_MEMBER == group->group_state) &&
{ igmp_start_timer (group, (igmp->igmp_maxresp)/2); (igmp->igmp_maxresp > group->timer))) {
igmp_start_timer(group, (igmp->igmp_maxresp)/2);
group->group_state = DELAYING_MEMBER; group->group_state = DELAYING_MEMBER;
} }
} } else {
else if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && !(ip_addr_cmp (dest, &allsystems)) &&
if ((IGMP_MEMB_QUERY == igmp->igmp_msgtype) && !(ip_addr_cmp (dest, &allsystems)) && (group->group_address.addr != 0)) (group->group_address.addr != 0)) {
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got a query to a specific group with the group address as destination \n", __LINE__)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got a query to a specific group with the group address as destination \n", __LINE__));
igmpstats.igmp_unicast_query++; /* This is the unicast query */ igmpstats.igmp_unicast_query++; /* This is the unicast query */
if ((IDLE_MEMBER == group->group_state ) || ((DELAYING_MEMBER == group->group_state ) && (igmp->igmp_maxresp > group->timer))) if ((IDLE_MEMBER == group->group_state) || ((DELAYING_MEMBER == group->group_state) &&
{ igmp_start_timer (group, (igmp->igmp_maxresp)/2); (igmp->igmp_maxresp > group->timer))) {
igmp_start_timer(group, (igmp->igmp_maxresp)/2);
group->group_state = DELAYING_MEMBER; group->group_state = DELAYING_MEMBER;
} }
} } else {
else if (IGMP_V2_MEMB_REPORT == igmp->igmp_msgtype) {
if (IGMP_V2_MEMB_REPORT == igmp->igmp_msgtype ) LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got an IGMP_V2_MEMB_REPORT \n", __LINE__));
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x got an IGMP_V2_MEMB_REPORT \n", __LINE__));
igmpstats.report_rxed++; igmpstats.report_rxed++;
if (DELAYING_MEMBER == group->group_state ) if (DELAYING_MEMBER == group->group_state) {
{ /* This is on a specific group we have already looked up */ /* This is on a specific group we have already looked up */
group->timer = 0; /* stopped */ group->timer = 0; /* stopped */
group->group_state = IDLE_MEMBER; group->group_state = IDLE_MEMBER;
group->last_reporter_flag = 0; group->last_reporter_flag = 0;
} }
} else {
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));
}
}
} }
else
{ 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));
} }
pbuf_free(p); pbuf_free(p);
return; return;
} }
/*----------------------------------------------------------------------------- /**
* igmp_joingroup * Join a group on one network interface.
*----------------------------------------------------------------------------*/ *
err_t igmp_joingroup( struct netif *ifp, struct ip_addr *groupaddr) * @param ifp the network interface which should join a new group
{ struct igmp_group *group; * @param groupaddr the ip address of the group which to join
* @return ERR_OK if group was joined, an err_t otherwise
*/
err_t
igmp_joingroup(struct netif *ifp, struct ip_addr *groupaddr)
{
struct igmp_group *group;
group = lookup_group(ifp, groupaddr); group = lookup_group(ifp, groupaddr);
if (group) if (group) {
{ /* This should create a new group, check the state to make sure */ /* This should create a new group, check the state to make sure */
if (group->group_state != NON_MEMBER) if (group->group_state != NON_MEMBER) {
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x join to group not in state NON_MEMBER\n", __LINE__)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x join to group not in state NON_MEMBER\n", __LINE__));
return ERR_OK; return ERR_OK;
} }
@ -303,8 +342,8 @@ err_t igmp_joingroup( struct netif *ifp, struct ip_addr *groupaddr)
LWIP_DEBUGF(IGMP_DEBUG, ("igmp join to new group\n")); LWIP_DEBUGF(IGMP_DEBUG, ("igmp join to new group\n"));
if (ifp->igmp_mac_filter!=NULL) if (ifp->igmp_mac_filter != NULL) {
{ ifp->igmp_mac_filter( ifp, groupaddr, IGMP_ADD_MAC_FILTER); ifp->igmp_mac_filter(ifp, groupaddr, IGMP_ADD_MAC_FILTER);
} }
igmp_send(group, IGMP_V2_MEMB_REPORT); igmp_send(group, IGMP_V2_MEMB_REPORT);
@ -320,18 +359,24 @@ err_t igmp_joingroup( struct netif *ifp, struct ip_addr *groupaddr)
return ERR_MEM; return ERR_MEM;
} }
/*----------------------------------------------------------------------------- /**
* igmp_leavegroup * Leave a group on one network interface.
*----------------------------------------------------------------------------*/ *
err_t igmp_leavegroup( struct netif *ifp, struct ip_addr *groupaddr) * @param ifp the network interface which should leave a group
{ struct igmp_group *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;
group = lookup_group(ifp, groupaddr); group = lookup_group(ifp, groupaddr);
if (group) if (group) {
{ /* Only send a leave if the flag is set according to the state diagram */ /* Only send a leave if the flag is set according to the state diagram */
if (group->last_reporter_flag) if (group->last_reporter_flag) {
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x Leaving group\n", __LINE__)); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c Line %x Leaving group\n", __LINE__));
igmpstats.igmp_leave_sent++; igmpstats.igmp_leave_sent++;
igmp_send(group, IGMP_LEAVE_GROUP); igmp_send(group, IGMP_LEAVE_GROUP);
} }
@ -341,8 +386,8 @@ err_t igmp_leavegroup( struct netif *ifp, struct ip_addr *groupaddr)
group->group_state = NON_MEMBER; group->group_state = NON_MEMBER;
group->timer = 0; group->timer = 0;
if (ifp->igmp_mac_filter!=NULL) if (ifp->igmp_mac_filter != NULL) {
{ ifp->igmp_mac_filter( ifp, groupaddr, IGMP_DEL_MAC_FILTER); ifp->igmp_mac_filter(ifp, groupaddr, IGMP_DEL_MAC_FILTER);
} }
return ERR_OK; return ERR_OK;
@ -351,65 +396,99 @@ err_t igmp_leavegroup( struct netif *ifp, struct ip_addr *groupaddr)
return ERR_MEM; return ERR_MEM;
} }
/*----------------------------------------------------------------------------- /**
* igmp_tmr * 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 = GroupList; void
igmp_tmr()
{
struct igmp_group *group = group_list;
while (group) while (group) {
{ if (group->timer != 0) if (group->timer != 0) {
{ group->timer -=1; group->timer -= 1;
if (group->timer == 0) if (group->timer == 0) {
{ igmp_timeout (group); igmp_timeout(group);
} }
} }
group = group->next; group = group->next;
} }
} }
/*----------------------------------------------------------------------------- /**
* igmp_timeout * Called if a timeout for one group is reached.
*----------------------------------------------------------------------------*/ * Sends a report for this group.
void igmp_timeout( struct igmp_group *group) *
{ /* If the state is DELAYING_MEMBER then we send 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")); LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c, got a timeout\n"));
if (DELAYING_MEMBER == group->group_state) if (DELAYING_MEMBER == group->group_state) {
{ igmp_send( group, IGMP_V2_MEMB_REPORT); igmp_send(group, IGMP_V2_MEMB_REPORT);
} }
} }
/*----------------------------------------------------------------------------- /**
* igmp_start_timer * Start a timer for an igmp group
*----------------------------------------------------------------------------*/ *
void igmp_start_timer( struct igmp_group *group, u8_t max_time) * @param group the igmp_group for which to start a timer
{ /* Important !! this should be random 0 -> max_time */ * @param max_time the time in multiples of IGMP_TMR_INTERVAL (decrease with
/* find out how to do this */ * 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; group->timer = max_time;
} }
/*----------------------------------------------------------------------------- /**
* igmp_stop_timer * Stop a timer for an igmp_group
*----------------------------------------------------------------------------*/ *
void igmp_stop_timer( struct igmp_group *group) * @param group the igmp_group for which to stop the timer
{ group->timer = 0; */
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 * 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, * 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. * 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) * @param p the packet to send (p->payload points to the data, e.g. next
{ static struct ip_hdr * iphdr = NULL; 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; static u16_t ip_id = 0;
u16_t * ra = NULL; u16_t * ra = NULL;
/* First write in the "router alert" */ /* First write in the "router alert" */
if (pbuf_header (p, ROUTER_ALERTLEN)) if (pbuf_header(p, ROUTER_ALERTLEN)) {
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n")); LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n"));
return ERR_BUF; return ERR_BUF;
} }
@ -419,14 +498,14 @@ err_t igmp_ip_output_if( struct pbuf *p, struct ip_addr *src, struct ip_addr *de
ra[1] = 0x0000; ra[1] = 0x0000;
/* now the normal ip header */ /* now the normal ip header */
if (pbuf_header (p, IP_HLEN)) if (pbuf_header(p, IP_HLEN)) {
{ LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n")); LWIP_DEBUGF(IGMP_DEBUG, ("igmp_ip_output_if: not enough room for IP header in pbuf\n"));
return ERR_BUF; return ERR_BUF;
} }
iphdr = p->payload; iphdr = p->payload;
if (dest != IP_HDRINCL) if (dest != IP_HDRINCL) {
{ iphdr->_ttl_proto = (proto<<8); iphdr->_ttl_proto = (proto<<8);
iphdr->_ttl_proto |= ttl; iphdr->_ttl_proto |= ttl;
/* iphdr->dest = dest->addr; */ /* iphdr->dest = dest->addr; */
@ -443,18 +522,16 @@ err_t igmp_ip_output_if( struct pbuf *p, struct ip_addr *src, struct ip_addr *de
iphdr->_offset = htons(0); iphdr->_offset = htons(0);
iphdr->_id = htons(ip_id++); iphdr->_id = htons(ip_id++);
if (ip_addr_isany (src)) if (ip_addr_isany(src)) {
{ ip_addr_set (&(iphdr->src), &(netif->ip_addr)); ip_addr_set(&(iphdr->src), &(netif->ip_addr));
} } else {
else ip_addr_set(&(iphdr->src), src);
{ ip_addr_set (&(iphdr->src), src);
} }
iphdr->_chksum = 0; iphdr->_chksum = 0;
iphdr->_chksum = inet_chksum(iphdr, IP_HLEN + ROUTER_ALERTLEN); iphdr->_chksum = inet_chksum(iphdr, IP_HLEN + ROUTER_ALERTLEN);
} } else {
else dest = &(iphdr->dest);
{ dest = &(iphdr->dest);
} }
#if IP_DEBUG #if IP_DEBUG
@ -466,11 +543,16 @@ err_t igmp_ip_output_if( struct pbuf *p, struct ip_addr *src, struct ip_addr *de
return netif->output(netif, p, dest); return netif->output(netif, p, dest);
} }
/*----------------------------------------------------------------------------- /**
* igmp_send * Send an igmp packet to a specific group.
*----------------------------------------------------------------------------*/ *
void igmp_send( struct igmp_group *group, u8_t type) * @param the group to which to send the packet
{ struct pbuf* p = NULL; * @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 igmpmsg* igmp = NULL;
struct ip_addr src = {0}; struct ip_addr src = {0};
struct ip_addr* dest = NULL; struct ip_addr* dest = NULL;
@ -478,24 +560,24 @@ void igmp_send( struct igmp_group *group, u8_t type)
/* IP header + IGMP header */ /* IP header + IGMP header */
p = pbuf_alloc(PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM); p = pbuf_alloc(PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM);
if (p) if (p) {
{ igmp = p->payload; igmp = p->payload;
ip_addr_set(&src, &((group->interface)->ip_addr)); ip_addr_set(&src, &((group->interface)->ip_addr));
if (IGMP_V2_MEMB_REPORT == type) if (IGMP_V2_MEMB_REPORT == type) {
{ dest = &(group->group_address); dest = &(group->group_address);
igmpstats.report_sent++; igmpstats.report_sent++;
ip_addr_set(&(igmp->igmp_group_address), &(group->group_address)); ip_addr_set(&(igmp->igmp_group_address), &(group->group_address));
group->last_reporter_flag = 1; /* Remember we were the last to report */ group->last_reporter_flag = 1; /* Remember we were the last to report */
} } else {
else if (IGMP_LEAVE_GROUP == type) {
if (IGMP_LEAVE_GROUP == type) dest = &allrouters;
{ dest = &allrouters;
ip_addr_set(&(igmp->igmp_group_address), &(group->group_address)); ip_addr_set(&(igmp->igmp_group_address), &(group->group_address));
} }
}
if ((IGMP_V2_MEMB_REPORT == type) || (IGMP_LEAVE_GROUP == type)) if ((IGMP_V2_MEMB_REPORT == type) || (IGMP_LEAVE_GROUP == type)) {
{ igmp->igmp_msgtype = type; igmp->igmp_msgtype = type;
igmp->igmp_maxresp = 0; igmp->igmp_maxresp = 0;
igmp->igmp_checksum = 0; igmp->igmp_checksum = 0;
igmp->igmp_checksum = inet_chksum( igmp, IGMP_MINLEN); igmp->igmp_checksum = inet_chksum( igmp, IGMP_MINLEN);
@ -504,9 +586,8 @@ void igmp_send( struct igmp_group *group, u8_t type)
} }
pbuf_free (p); pbuf_free (p);
} } else {
else LWIP_DEBUGF(IGMP_DEBUG, ("IGMP, not enough memory for igmp_send\n"));
{ LWIP_DEBUGF(IGMP_DEBUG, ("IGMP, not enough memory for igmp_send\n"));
} }
} }