2004-08-19 Paul Jakma <paul@dishone.st>
2004-08-19 Paul Jakma <paul@dishone.st>
* sockopt.c: include sockopt.h
rename some of the _pktinfo_ functions to _ifindex, where that is
their purpose.
(getsockopt_ipv6_pktinfo_ifindex) renamed to
getsockopt_ipv6_ifindex.
(setsockopt_ipv4_pktinfo) renamed to setsockopt_ipv4_ifindex
(setsockopt_pktinfo) update with previous and add comment re
AF_INET portability.
(setsockopt_ifindex) generic ifindex function ala
setsockopt_pktinfo.
(getsockopt_ipv4_pktinfo_ifindex) renamed to
getsockopt_ipv4_ifindex.
(getsockopt_ipv4_ifindex) rejiggling to reduce repeated
ifdef/elses. pktinfo case forgot to set ifindex.
(getsockopt_pktinfo_ifindex) renamed to
getsockopt_ifindex. update some calls to renamed functions.
* sockopt.h: Update renamed exported functions
Rename the CMSG_SIZE macros to IFINDEX.
Guard IPv4 PKTINFO in a conditional define.
diff --git a/lib/sockopt.c b/lib/sockopt.c
index 682b739..d0b034f 100644
--- a/lib/sockopt.c
+++ b/lib/sockopt.c
@@ -21,6 +21,7 @@
#include <zebra.h>
#include "log.h"
+#include "sockopt.h"
static void *
getsockopt_cmsg_data (struct msghdr *msgh, int level, int type)
@@ -125,7 +126,7 @@
}
static int
-getsockopt_ipv6_pktinfo_ifindex (struct msghdr *msgh)
+getsockopt_ipv6_ifindex (struct msghdr *msgh)
{
struct in6_pktinfo *pktinfo;
@@ -221,7 +222,7 @@
}
static int
-setsockopt_ipv4_pktinfo (int sock, int val)
+setsockopt_ipv4_ifindex (int sock, int val)
{
int ret;
@@ -243,6 +244,7 @@
/* set appropriate pktinfo socket option
* on systems without PKTINFO, sets RECVIF, which only retrieves
* interface index.
+ * Not portable for IPv4, use only setsockopt_ifindex for v4.
*/
int
setsockopt_pktinfo (int af, int sock, int val)
@@ -252,7 +254,8 @@
switch (af)
{
case AF_INET:
- ret = setsockopt_ipv4_pktinfo (sock, val);
+ /* _ifindex will use PKTINFO if available.. */
+ ret = setsockopt_ipv4_ifindex (sock, val);
break;
#ifdef HAVE_IPV6
case AF_INET6:
@@ -265,62 +268,83 @@
return ret;
}
-
-static int
-getsockopt_ipv4_pktinfo_ifindex (struct msghdr *msgh)
+int
+setsockopt_ifindex (int af, int sock, int val)
{
- int ifindex = 0;
-#if defined (IP_PKTINFO)
+ int ret = -1;
+
+ switch (af)
+ {
+ case AF_INET:
+ ret = setsockopt_ipv4_ifindex (sock, val);
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ ret = setsockopt_ipv6_pktinfo (sock, val);
+ break;
+#endif
+ default:
+ zlog_warn ("setsockopt_ifindex: unknown address family %d");
+ }
+ return ret;
+}
+
+static int
+getsockopt_ipv4_ifindex (struct msghdr *msgh)
+{
+ int ifindex = -1;
+#if defined(IP_PKTINFO)
+/* Linux pktinfo based ifindex retrieval */
struct in_pktinfo *pktinfo;
-#elif defined (IP_RECVIF)
+
+ pktinfo =
+ (struct in_pktinfo *)getsockopt_cmsg_data (msgh, IPPROTO_IP, IP_PKTINFO);
+ ifindex = pktinfo->ipi_ifindex;
+
+#elif defined(IP_RECVIF)
+/* BSD/other IP_RECVIF based ifindex retrieval */
#ifndef SUNOS_5
/* RECVIF, but not SUNOS, so BSD */
struct sockaddr_dl *sdl;
#endif /* SUNOS_5 */
/* SUNOS_5 doesn't need a structure to extract ifindex */
-#else /* IP_RECVIF */
- /* XXX Neither, so we are going to lose. */
-#endif /* IP_PKTINFO */
-
-#ifdef IP_PKTINFO
- pktinfo =
- (struct in_pktinfo *)getsockopt_cmsg_data (msgh, IPPROTO_IP, IP_PKTINFO);
-#elif defined (IP_RECVIF)
+
#ifndef SUNOS_5
sdl =
(struct sockaddr_dl *)getsockopt_cmsg_data (msgh, IPPROTO_IP, IP_RECVIF);
ifindex = sdl->sdl_index;
-#else
+#else /* !SUNOS_5 */
ifindex = *(uint_t *)getsockopt_cmsg_data (msgh, IPPROTO_IP, IP_RECVIF);
#endif /* SUNOS_5 */
-#else
+
+#else /* neither IP_PKTINFO nor IP_RECVIF, broken */
+
#warning "getsockopt_ipv4_pktinfo_ifindex: dont have PKTINFO or RECVIF"
+#warning "things will be broken on this platform!"
/* XXX why not -1 - this is a failure condition. */
- ifindex = 0;
-#endif /* IP_PKTINFO */
-
+ ifindex = -1;
+#endif /* IP_PKTINFO */
return ifindex;
}
/* return ifindex, 0 if none found */
int
-getsockopt_pktinfo_ifindex (int af, struct msghdr *msgh)
+getsockopt_ifindex (int af, struct msghdr *msgh)
{
int ifindex = 0;
switch (af)
{
case AF_INET:
- return (getsockopt_ipv4_pktinfo_ifindex (msgh));
+ return (getsockopt_ipv4_ifindex (msgh));
break;
#ifdef HAVE_IPV6
case AF_INET6:
- return (getsockopt_ipv6_pktinfo_ifindex (msgh));
+ return (getsockopt_ipv6_ifindex (msgh));
break;
#endif
default:
- zlog_warn ("getsockopt_pktinfo_ifindex: unknown address family %d");
+ zlog_warn ("getsockopt_ifindex: unknown address family %d");
return (ifindex = 0);
}
}
-