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ospfd,eigrpd: don't take address of packed struct member

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Use a local variable to avoid trying to take the address
of a packed struct member - an address from the ip header
in these cases.

Signed-off-by: Mark Stapp <mjs@voltanet.io>
This commit is contained in:
Mark Stapp 2019-11-11 12:22:38 -05:00
parent 306c4dab55
commit 9e03055062
2 changed files with 8 additions and 5 deletions
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9
eigrpd/eigrp_packet.c
View File

@ -485,7 +485,7 @@ int eigrp_read(struct thread *thread)
struct eigrp_header *eigrph; struct eigrp_header *eigrph;
struct interface *ifp; struct interface *ifp;
struct eigrp_neighbor *nbr; struct eigrp_neighbor *nbr;
struct in_addr srcaddr;
uint16_t opcode = 0; uint16_t opcode = 0;
uint16_t length = 0; uint16_t length = 0;
@ -511,6 +511,7 @@ int eigrp_read(struct thread *thread)
if (iph->ip_v == 4) if (iph->ip_v == 4)
length = (iph->ip_len) - 20U; length = (iph->ip_len) - 20U;
srcaddr = iph->ip_src;
/* IP Header dump. */ /* IP Header dump. */
if (IS_DEBUG_EIGRP_TRANSMIT(0, RECV) if (IS_DEBUG_EIGRP_TRANSMIT(0, RECV)
@ -526,7 +527,7 @@ int eigrp_read(struct thread *thread)
and also platforms (such as Solaris 8) that claim to support and also platforms (such as Solaris 8) that claim to support
ifindex ifindex
retrieval but do not. */ retrieval but do not. */
c = if_lookup_address((void *)&iph->ip_src, AF_INET, c = if_lookup_address((void *)&srcaddr, AF_INET,
eigrp->vrf_id); eigrp->vrf_id);
if (c == NULL) if (c == NULL)
@ -549,11 +550,11 @@ int eigrp_read(struct thread *thread)
/* Self-originated packet should be discarded silently. */ /* Self-originated packet should be discarded silently. */
if (eigrp_if_lookup_by_local_addr(eigrp, NULL, iph->ip_src) if (eigrp_if_lookup_by_local_addr(eigrp, NULL, iph->ip_src)
|| (IPV4_ADDR_SAME(&iph->ip_src, &ei->address.u.prefix4))) { || (IPV4_ADDR_SAME(&srcaddr, &ei->address.u.prefix4))) {
if (IS_DEBUG_EIGRP_TRANSMIT(0, RECV)) if (IS_DEBUG_EIGRP_TRANSMIT(0, RECV))
zlog_debug( zlog_debug(
"eigrp_read[%s]: Dropping self-originated packet", "eigrp_read[%s]: Dropping self-originated packet",
inet_ntoa(iph->ip_src)); inet_ntoa(srcaddr));
return 0; return 0;
} }

4
ospfd/ospf_neighbor.c
View File

@ -402,12 +402,14 @@ void ospf_renegotiate_optional_capabilities(struct ospf *top)
struct ospf_neighbor *ospf_nbr_lookup(struct ospf_interface *oi, struct ip *iph, struct ospf_neighbor *ospf_nbr_lookup(struct ospf_interface *oi, struct ip *iph,
struct ospf_header *ospfh) struct ospf_header *ospfh)
{ {
struct in_addr srcaddr = iph->ip_src;
if (oi->type == OSPF_IFTYPE_VIRTUALLINK if (oi->type == OSPF_IFTYPE_VIRTUALLINK
|| oi->type == OSPF_IFTYPE_POINTOPOINT) || oi->type == OSPF_IFTYPE_POINTOPOINT)
return (ospf_nbr_lookup_by_routerid(oi->nbrs, return (ospf_nbr_lookup_by_routerid(oi->nbrs,
&ospfh->router_id)); &ospfh->router_id));
else else
return (ospf_nbr_lookup_by_addr(oi->nbrs, &iph->ip_src)); return (ospf_nbr_lookup_by_addr(oi->nbrs, &srcaddr));
} }
static struct ospf_neighbor *ospf_nbr_add(struct ospf_interface *oi, static struct ospf_neighbor *ospf_nbr_add(struct ospf_interface *oi,