proxmox-mirrors/mirror_frr
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_frr synced 2025-08-15 03:27:25 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

pim6d: IPv6 headers are always stripped on receive

Browse Source 
IPV6_HDRINCL is a TX-only option (unlike IP_HDRINCL), so on RX there
never are IPv6 headers to be looked at / skipped over.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2022-03-25 11:30:13 +01:00 committed by Mobashshera Rasool
parent f20d0d7cf2
commit 5e6e8a3959
2 changed files with 24 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
pimd/pim_pim.c
View File

@ -149,10 +149,13 @@ static bool pim_pkt_dst_addr_ok(enum pim_msg_type type, pim_addr addr)
return true;
}
int pim_pim_packet(struct interface *ifp, uint8_t *buf, size_t len)
int pim_pim_packet(struct interface *ifp, uint8_t *buf, size_t len,
pim_sgaddr sg)
{
#if PIM_IPV == 4
struct ip *ip_hdr = (struct ip *)buf;
size_t ip_hlen; /* ip header length in bytes */
#endif
uint8_t *pim_msg;
uint32_t pim_msg_len = 0;
uint16_t pim_checksum; /* received checksum */
@ -160,8 +163,8 @@ int pim_pim_packet(struct interface *ifp, uint8_t *buf, size_t len)
struct pim_neighbor *neigh;
struct pim_msg_header *header;
bool no_fwd;
pim_sgaddr sg;
#if PIM_IPV == 4
if (len < sizeof(*ip_hdr)) {
if (PIM_DEBUG_PIM_PACKETS)
zlog_debug(
@ -171,10 +174,15 @@ int pim_pim_packet(struct interface *ifp, uint8_t *buf, size_t len)
}
ip_hlen = ip_hdr->ip_hl << 2; /* ip_hl gives length in 4-byte words */
sg = pim_sgaddr_from_iphdr(buf);
sg = pim_sgaddr_from_iphdr(ip_hdr);
pim_msg = buf + ip_hlen;
pim_msg_len = len - ip_hlen;
#else
/* NB: header is not included in IPv6 RX */
pim_msg = buf;
pim_msg_len = len;
#endif
header = (struct pim_msg_header *)pim_msg;
if (pim_msg_len < PIM_PIM_MIN_LEN) {
@ -332,6 +340,8 @@ static void pim_sock_read(struct thread *t)
pim_ifp = ifp->info;
while (cont) {
pim_sgaddr sg;
len = pim_socket_recvfromto(fd, buf, sizeof(buf), &from,
&fromlen, &to, &tolen, &ifindex);
if (len < 0) {
@ -361,7 +371,15 @@ static void pim_sock_read(struct thread *t)
ifindex);
goto done;
}
int fail = pim_pim_packet(ifp, buf, len);
#if PIM_IPV == 4
sg.src = ((struct sockaddr_in *)&from)->sin_addr;
sg.grp = ((struct sockaddr_in *)&to)->sin_addr;
#else
sg.src = ((struct sockaddr_in6 *)&from)->sin6_addr;
sg.grp = ((struct sockaddr_in6 *)&to)->sin6_addr;
#endif
int fail = pim_pim_packet(ifp, buf, len, sg);
if (fail) {
if (PIM_DEBUG_PIM_PACKETS)
zlog_debug("%s: pim_pim_packet() return=%d",

3
pimd/pim_pim.h
View File

@ -54,7 +54,8 @@ void pim_sock_delete(struct interface *ifp, const char *delete_message);
void pim_hello_restart_now(struct interface *ifp);
void pim_hello_restart_triggered(struct interface *ifp);
int pim_pim_packet(struct interface *ifp, uint8_t *buf, size_t len);
int pim_pim_packet(struct interface *ifp, uint8_t *buf, size_t len,
pim_sgaddr sg);
int pim_msg_send(int fd, pim_addr src, pim_addr dst, uint8_t *pim_msg,
int pim_msg_size, const char *ifname);