mirror/lwip
1
0
Fork 0
mirror of https://github.com/lwip-tcpip/lwip.git synced 2024-11-17 17:10:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

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).

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
CHANGELOG
View File

@ -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
View File

@ -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
View File

@ -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