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pimd: Mark Default TOS Values for PIM & IGMP Outgoing packets

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This will facilitate the Hardware to prefer control packets over
Normal Data packets while queuing, so that during congestion, the
chance of dropping control packet will be minimised.

Signed-off-by: Satheesh Kumar K <sathk@cumulusnetworks.com>
This commit is contained in:
Satheesh Kumar K 2019-09-23 20:45:05 -07:00
parent 5034c882bf
commit 9036d0ef1a
2 changed files with 7 additions and 0 deletions
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1
pimd/pim_pim.c
View File

@ -574,6 +574,7 @@ int pim_msg_send(int fd, struct in_addr src, struct in_addr dst,
ip->ip_id = htons(++ip_id);
ip->ip_hl = 5;
ip->ip_v = 4;
ip->ip_tos = IPTOS_PREC_INTERNETCONTROL;
ip->ip_p = PIM_IP_PROTO_PIM;
ip->ip_src = src;
ip->ip_dst = dst;

6
pimd/pim_sock.c
View File

@ -255,6 +255,12 @@ int pim_socket_mcast(int protocol, struct in_addr ifaddr, struct interface *ifp,
}
}
/* Set Tx socket DSCP byte */
if (setsockopt_ipv4_tos(fd, IPTOS_PREC_INTERNETCONTROL)) {
zlog_warn("can't set sockopt IP_TOS to PIM/IGMP socket %d: %s",
fd, safe_strerror(errno));
}
return fd;
}