On 12/02/15 20:06, Martin Pieuchot wrote:
> On 02/12/15(Wed) 16:18, Vincent Gross wrote:
>> When fed a broadcast address, ifa_ifwitaddr() returns the unicast ifa
>> whose broadcast address match the input. This is used mainly to select
>> ifa, and there can be trouble when you have 2 ifas on the same range
>> (e.g. 10.0.0.1/24@em0 & 10.0.0.20/24@em1) :
>>
>> netinet/ip_mroute.c:814
>> net/route.c:785
>> netinet/ip_divert.c:143
>> net/if_vxlan.c:241
>>
>> There are also places where broadcast addresses should not be tolerated :
>>
>> netinet/ip_input.c:1061 broadcast address is not a module identifier
>> netinet/ip_input.c:1141 see above
>> netinet/ip_input.c:1197 see above
>> netinet6/*: no broadcast in ipv6
>> net/route.c:562: gateway shall never be a broadcast addr
>> net/route.c:713: see above
>>
>> This diff removes broadcast matching from ifa_ifwithaddr, and
>> adds or rewrites checks where necessary.
>>
>> Comments ? Ok ?
>
> Looks good to me. Some nits below.
Nits applied.
Anyone else ?
Index: sys/net/if.c
===================================================================
RCS file: /cvs/src/sys/net/if.c,v
retrieving revision 1.417
diff -u -p -r1.417 if.c
--- sys/net/if.c 2 Dec 2015 16:35:52 -0000 1.417
+++ sys/net/if.c 3 Dec 2015 07:59:53 -0000
@@ -1179,13 +1179,6 @@ ifa_ifwithaddr(struct sockaddr *addr, u_
if (equal(addr, ifa->ifa_addr))
return (ifa);
-
- /* IPv6 doesn't have broadcast */
- if ((ifp->if_flags & IFF_BROADCAST) &&
- ifa->ifa_broadaddr &&
- ifa->ifa_broadaddr->sa_len != 0 &&
- equal(ifa->ifa_broadaddr, addr))
- return (ifa);
}
}
return (NULL);
Index: sys/netinet/in_pcb.c
===================================================================
RCS file: /cvs/src/sys/netinet/in_pcb.c,v
retrieving revision 1.190
diff -u -p -r1.190 in_pcb.c
--- sys/netinet/in_pcb.c 2 Dec 2015 22:13:44 -0000 1.190
+++ sys/netinet/in_pcb.c 3 Dec 2015 07:59:53 -0000
@@ -332,14 +332,13 @@ in_pcbbind(struct inpcb *inp, struct mbu
ia = ifatoia(ifa_ifwithaddr(sintosa(sin),
inp->inp_rtableid));
- if (ia == NULL)
- return (EADDRNOTAVAIL);
/* SOCK_RAW does not use in_pcbbind() */
- if (so->so_type != SOCK_DGRAM &&
- sin->sin_addr.s_addr !=
- ia->ia_addr.sin_addr.s_addr)
- return (EADDRNOTAVAIL);
+ if (ia == NULL &&
+ (so->so_type != SOCK_DGRAM ||
+ !in_broadcast(sin->sin_addr,
+ inp->inp_rtableid)))
+ return (EADDRNOTAVAIL);
}
}
if (lport) {
@@ -353,7 +352,8 @@ in_pcbbind(struct inpcb *inp, struct mbu
t = in_pcblookup(table, &zeroin_addr, 0,
&sin->sin_addr, lport, INPLOOKUP_WILDCARD,
inp->inp_rtableid);
- if (t && (so->so_euid !=
t->inp_socket->so_euid))
+ if (t &&
+ (so->so_euid != t->inp_socket->so_euid))
return (EADDRINUSE);
}
t = in_pcblookup(table, &zeroin_addr, 0,
Index: sys/netinet/ip_output.c
===================================================================
RCS file: /cvs/src/sys/netinet/ip_output.c,v
retrieving revision 1.311
diff -u -p -r1.311 ip_output.c
--- sys/netinet/ip_output.c 2 Dec 2015 20:50:20 -0000 1.311
+++ sys/netinet/ip_output.c 3 Dec 2015 07:59:53 -0000
@@ -1368,13 +1368,12 @@ ip_setmoptions(int optname, struct ip_mo
sin.sin_family = AF_INET;
sin.sin_addr = addr;
ia = ifatoia(ifa_ifwithaddr(sintosa(&sin), rtableid));
- if (ia && in_hosteq(sin.sin_addr, ia->ia_addr.sin_addr))
- ifp = ia->ia_ifp;
- if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
+ if (ia == NULL ||
+ (ia->ia_ifp->if_flags & IFF_MULTICAST) == 0) {
error = EADDRNOTAVAIL;
break;
}
- imo->imo_ifidx = ifp->if_index;
+ imo->imo_ifidx = ia->ia_ifp->if_index;
break;
case IP_MULTICAST_TTL:
@@ -1542,12 +1541,11 @@ ip_setmoptions(int optname, struct ip_mo
sin.sin_family = AF_INET;
sin.sin_addr = mreq->imr_interface;
ia = ifatoia(ifa_ifwithaddr(sintosa(&sin), rtableid));
- if (ia && in_hosteq(sin.sin_addr, ia->ia_addr.sin_addr))
- ifp = ia->ia_ifp;
- else {
+ if (ia == NULL) {
error = EADDRNOTAVAIL;
break;
}
+ ifp = ia->ia_ifp;
}
/*
* Find the membership in the membership array.
Index: sys/netinet/raw_ip.c
===================================================================
RCS file: /cvs/src/sys/netinet/raw_ip.c,v
retrieving revision 1.84
diff -u -p -r1.84 raw_ip.c
--- sys/netinet/raw_ip.c 28 Jul 2015 12:22:07 -0000 1.84
+++ sys/netinet/raw_ip.c 3 Dec 2015 07:59:53 -0000
@@ -473,6 +473,7 @@ rip_usrreq(struct socket *so, int req, s
if (!((so->so_options & SO_BINDANY) ||
addr->sin_addr.s_addr == INADDR_ANY ||
addr->sin_addr.s_addr == INADDR_BROADCAST ||
+ in_broadcast(addr->sin_addr, inp->inp_rtableid) ||
ifa_ifwithaddr(sintosa(addr), inp->inp_rtableid))) {
error = EADDRNOTAVAIL;
break;
