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igmp.h, igmp.c: Fix bug #22613 "IGMP iphdr problem" (could have some problems to fill the IP header on some targets, use now the ip.h macros to do it).

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This commit is contained in:
fbernon 2008-03-17 13:40:00 +00:00
parent 03f888c968
commit 7fa9010f35
3 changed files with 37 additions and 24 deletions
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5
CHANGELOG
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@ -600,6 +600,11 @@ HISTORY
++ Bug fixes:
2008-03-17 Frédéric Bernon, Ed Kerekes
* igmp.h, igmp.c: Fix bug #22613 "IGMP iphdr problem" (could have
some problems to fill the IP header on some targets, use now the
ip.h macros to do it).
2008-03-13 Frédéric Bernon
* sockets.c: Fix bug #22435 "lwip_recvfrom with TCP break;". Using
(lwip_)recvfrom with valid "from" and "fromlen" parameters, on a

37
src/core/ipv4/igmp.c
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@ -350,7 +350,7 @@ igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest)
/* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */
iphdr = p->payload;
if (pbuf_header(p, -(IPH_HL(iphdr) * 4)) || (p->len < IGMP_MINLEN)) {
if (pbuf_header(p, -(s16_t)(IPH_HL(iphdr) * 4)) || (p->len < IGMP_MINLEN)) {
pbuf_free(p);
IGMP_STATS_INC(igmp.lenerr);
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: length error\n"));
@ -707,8 +707,8 @@ igmp_ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
/* This is the "router alert" option */
ra = p->payload;
ra[0] = htons (0x9404);
ra[1] = 0x0000;
ra[0] = htons (ROUTER_ALERT);
ra[1] = 0x0000; /* Router shall examine packet */
/* now the normal ip header */
if (pbuf_header(p, IP_HLEN)) {
@ -717,23 +717,20 @@ igmp_ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
}
iphdr = p->payload;
/* Should the IP header be generated or is it already included in p? */
if (dest != IP_HDRINCL) {
iphdr->_ttl_proto = (proto<<8);
iphdr->_ttl_proto |= ttl;
/** @todo should be shared with ip.c - ip_output_if */
IPH_TTL_SET(iphdr, ttl);
IPH_PROTO_SET(iphdr, proto);
/* 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;
#else
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++);
IPH_VHLTOS_SET(iphdr, 4, ((IP_HLEN + ROUTER_ALERTLEN) / 4), 0/*tos*/);
IPH_LEN_SET(iphdr, htons(p->tot_len));
IPH_OFFSET_SET(iphdr, 0);
IPH_ID_SET(iphdr, htons(ip_id));
++ip_id;
if (ip_addr_isany(src)) {
ip_addr_set(&(iphdr->src), &(netif->ip_addr));
@ -741,8 +738,10 @@ igmp_ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
ip_addr_set(&(iphdr->src), src);
}
iphdr->_chksum = 0;
iphdr->_chksum = inet_chksum(iphdr, IP_HLEN + ROUTER_ALERTLEN);
IPH_CHKSUM_SET(iphdr, 0);
#if CHECKSUM_GEN_IP
IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, (IP_HLEN + ROUTER_ALERTLEN)));
#endif
} else {
dest = &(iphdr->dest);
}
@ -770,7 +769,7 @@ igmp_send(struct igmp_group *group, u8_t type)
struct ip_addr src = {0};
struct ip_addr* dest = NULL;
/* IP header + IGMP header */
/* IP header + "router alert" option + IGMP header */
p = pbuf_alloc(PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM);
if (p) {

19
src/include/ipv4/lwip/igmp.h
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@ -52,6 +52,7 @@ extern "C" {
#define IP_PROTO_IGMP 2
#define IGMP_TTL 1
#define IGMP_MINLEN 8
#define ROUTER_ALERT 0x9404
#define ROUTER_ALERTLEN 4
/*
@ -79,12 +80,20 @@ extern "C" {
/*
* IGMP packet format.
*/
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct igmp_msg {
u8_t igmp_msgtype;
u8_t igmp_maxresp;
u16_t igmp_checksum;
struct ip_addr igmp_group_address;
};
PACK_STRUCT_FIELD(u8_t igmp_msgtype);
PACK_STRUCT_FIELD(u8_t igmp_maxresp);
PACK_STRUCT_FIELD(u16_t igmp_checksum);
PACK_STRUCT_FIELD(struct ip_addr igmp_group_address);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
/*
* now a group structure - there is