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[src/trunk]: src/usr.sbin/pppd/pppd Revert previous. It is too aggressive and...
details: https://anonhg.NetBSD.org/src/rev/b6d328be0c28
branches: trunk
changeset: 787254:b6d328be0c28
user: christos <christos%NetBSD.org@localhost>
date: Sat Jun 08 13:13:34 2013 +0000
description:
Revert previous. It is too aggressive and might pick the wrong interface
now.
diffstat:
usr.sbin/pppd/pppd/sys-bsd.c | 180 +++++++++++++-----------------------------
1 files changed, 56 insertions(+), 124 deletions(-)
diffs (truncated from 306 to 300 lines):
diff -r 1c480706c3be -r b6d328be0c28 usr.sbin/pppd/pppd/sys-bsd.c
--- a/usr.sbin/pppd/pppd/sys-bsd.c Sat Jun 08 12:50:32 2013 +0000
+++ b/usr.sbin/pppd/pppd/sys-bsd.c Sat Jun 08 13:13:34 2013 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sys-bsd.c,v 1.66 2013/06/07 17:17:14 christos Exp $ */
+/* $NetBSD: sys-bsd.c,v 1.67 2013/06/08 13:13:34 christos Exp $ */
/*
* sys-bsd.c - System-dependent procedures for setting up
@@ -79,7 +79,7 @@
#if 0
#define RCSID "Id: sys-bsd.c,v 1.47 2000/04/13 12:04:23 paulus Exp "
#else
-__RCSID("$NetBSD: sys-bsd.c,v 1.66 2013/06/07 17:17:14 christos Exp $");
+__RCSID("$NetBSD: sys-bsd.c,v 1.67 2013/06/08 13:13:34 christos Exp $");
#endif
#endif
@@ -1540,27 +1540,6 @@
return dodefaultroute(g, 'c');
}
-#if RTM_VERSION >= 3
-static struct {
- struct rt_msghdr hdr;
- char space[512];
-} arpmsg;
-
-static int arpmsg_valid;
-
-static void
-consume(int routes) {
- ssize_t l;
- pid_t pid = getpid();
- struct rt_msghdr *rtm = &arpmsg.hdr;
-
- do
- l = read(routes, &arpmsg, sizeof(arpmsg));
- while (l > 0 && (rtm->rtm_seq != rtm_seq || rtm->rtm_pid != pid));
- if (l < 0)
- warn("read from routing socket");
-}
-
/*
* dodefaultroute - talk to a routing socket to add/delete a default route.
*/
@@ -1576,7 +1555,7 @@
struct sockaddr_dl ifp;
} rtmsg;
- if ((routes = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) {
+ if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
if (!doing_cleanup)
error("%s: Couldn't %s default route: socket: %m", __func__,
cmd == 's' ? "add" : "delete");
@@ -1617,55 +1596,42 @@
close(routes);
return 0;
}
- consume(routes);
close(routes);
default_route_gateway = (cmd == 's') ? g : 0;
return 1;
}
-
-#if 0
-static void
-hdrprint(const struct rt_msghdr *rtm) {
- printf("rtm_msglen=%u\n", rtm->rtm_msglen);
- printf("rtm_version=%u\n", rtm->rtm_version);
- printf("rtm_type=%u\n", rtm->rtm_type);
- printf("rtm_index=%u\n", rtm->rtm_index);
- printf("rtm_flags=%x\n", rtm->rtm_flags);
- printf("rtm_addrs=%d\n", rtm->rtm_addrs);
- printf("rtm_pid=%lu\n", (unsigned long)rtm->rtm_pid);
- printf("rtm_seq=%d\n", rtm->rtm_seq);
- printf("rtm_errno=%d\n", rtm->rtm_errno);
- printf("rtm_use=%d\n", rtm->rtm_use);
- printf("rtm_inits=%d\n", rtm->rtm_inits);
- printf("rtm_rmx.rmx_expire=%lld\n", (long long)rtm->rtm_rmx.rmx_expire);
-}
-#endif
-
+#if RTM_VERSION >= 3
/*
* sifproxyarp - Make a proxy ARP entry for the peer.
*/
+static struct {
+ struct rt_msghdr hdr;
+ struct sockaddr_inarp dst;
+ struct sockaddr_dl hwa;
+ char extra[128];
+} arpmsg;
+
+static int arpmsg_valid;
+
int
sifproxyarp(int unit, u_int32_t hisaddr)
{
int routes;
- struct sockaddr_inarp dst;
- struct sockaddr_dl sdl;
- char *cp;
/*
* Get the hardware address of an interface on the same subnet
* as our local address.
*/
memset(&arpmsg, 0, sizeof(arpmsg));
- if (!get_ether_addr(hisaddr, &sdl)) {
+ if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
error("%s: Cannot determine ethernet address for proxy ARP", __func__);
return 0;
}
- if ((routes = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) {
+ if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
error("%s: Couldn't add proxy arp entry: socket: %m", __func__);
return 0;
}
@@ -1676,29 +1642,19 @@
arpmsg.hdr.rtm_seq = ++rtm_seq;
arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
arpmsg.hdr.rtm_inits = RTV_EXPIRE;
-
- memset(&dst, 0, sizeof(dst));
- dst.sin_len = sizeof(struct sockaddr_in);
- dst.sin_family = AF_INET;
- dst.sin_addr.s_addr = hisaddr;
- dst.sin_other = SIN_PROXY;
+ arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
+ arpmsg.dst.sin_family = AF_INET;
+ arpmsg.dst.sin_addr.s_addr = hisaddr;
+ arpmsg.dst.sin_other = SIN_PROXY;
- cp = arpmsg.space;
-#define NEXTADDR(s) \
- (void)memcpy(cp, &s, (size_t)((struct sockaddr *)(void *)&s)->sa_len), \
- RT_ADVANCE(cp, ((struct sockaddr *)(void *)&s))
- NEXTADDR(dst);
- NEXTADDR(sdl);
- arpmsg.hdr.rtm_msglen = cp - (char *)(void *)&arpmsg;
-
+ arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
+ + RT_ROUNDUP(arpmsg.hwa.sdl_len);
if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
error("%s: Couldn't add proxy arp entry: %m", __func__);
close(routes);
return 0;
}
- consume(routes);
-
close(routes);
arpmsg_valid = 1;
proxy_arp_addr = hisaddr;
@@ -1720,7 +1676,7 @@
arpmsg.hdr.rtm_type = RTM_DELETE;
arpmsg.hdr.rtm_seq = ++rtm_seq;
- if ((routes = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) {
+ if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
if (!doing_cleanup)
error("%s: Couldn't delete proxy arp entry: socket: %m", __func__);
return 0;
@@ -1732,8 +1688,6 @@
close(routes);
return 0;
}
- consume(routes);
-
close(routes);
proxy_arp_addr = 0;
@@ -1800,16 +1754,6 @@
}
#endif /* RTM_VERSION */
-static struct ifaddrs *
-getlink(struct ifaddrs *ifa, const char *name)
-{
- for (; ifa; ifa = ifa->ifa_next)
- if (strcmp(ifa->ifa_name, name) == 0 &&
- ifa->ifa_addr->sa_family == AF_LINK)
- return ifa;
- return NULL;
-}
-
/*
* get_ether_addr - get the hardware address of an interface on the
@@ -1818,8 +1762,9 @@
static int
get_ether_addr(u_int32_t ipaddr, struct sockaddr_dl *hwaddr)
{
+ u_int32_t ina, mask;
struct sockaddr_dl *dla;
- struct ifaddrs *ifap, *ifa, *ifp, *iflink;
+ struct ifaddrs *ifap, *ifa, *ifp;
/*
* Scan through looking for an interface with an Internet
@@ -1830,68 +1775,55 @@
return 0;
}
- for (ifp = NULL, ifa = ifap; ifa; ifa = ifa->ifa_next) {
+ for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
+ if (ifa->ifa_addr->sa_family != AF_INET)
+ continue;
+ ina = ((struct sockaddr_in *) ifa->ifa_addr)->sin_addr.s_addr;
/*
* Check that the interface is up, and not point-to-point
* or loopback.
*/
if ((ifa->ifa_flags &
(IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
- != (IFF_UP|IFF_BROADCAST)) {
- continue;
- }
-
- switch (ifa->ifa_addr->sa_family) {
- case AF_INET:
- case AF_INET6:
- /*
- * See if it has a link address and remember it.
- */
- if ((iflink = getlink(ifap, ifa->ifa_name)) == NULL)
- continue;
- if (ifp == NULL)
- ifp = iflink;
- else
- info("more than one interfaces match for proxy arp");
- break;
- default:
+ != (IFF_UP|IFF_BROADCAST))
continue;
- }
-
- switch (ifa->ifa_addr->sa_family) {
- u_int32_t ina, mask;
- case AF_INET:
- /*
- * Get its netmask and check that it's on the right subnet.
- */
- ina = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr;
- mask = ((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr.s_addr;
- if ((ipaddr & mask) != (ina & mask))
- continue;
- ifp = iflink;
- break;
- case AF_INET6:
- /* XXX */
- break;
- default:
- abort();
- }
+ /*
+ * Get its netmask and check that it's on the right subnet.
+ */
+ mask = ((struct sockaddr_in *) ifa->ifa_netmask)->sin_addr.s_addr;
+ if ((ipaddr & mask) != (ina & mask))
+ continue;
break;
}
- if (!ifp) {
+ if (!ifa) {
freeifaddrs(ifap);
return 0;
}
- info("found interface %s for proxy arp", ifp->ifa_name);
+ info("found interface %s for proxy arp", ifa->ifa_name);
+
+ ifp = ifa;
/*
- * copy out the link-level address
+ * Now scan through again looking for a link-level address
+ * for this interface.
*/
- dla = (struct sockaddr_dl *) ifp->ifa_addr;
- BCOPY(dla, hwaddr, sizeof(*dla));
+ for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
+ if (strcmp(ifp->ifa_name, ifa->ifa_name) != 0)
+ continue;
+ if (ifa->ifa_addr->sa_family != AF_LINK)
+ continue;
+ /*
+ * Found the link-level address - copy it out
+ */
+ dla = (struct sockaddr_dl *) ifa->ifa_addr;
+ BCOPY(dla, hwaddr, dla->sdl_len);
+ freeifaddrs(ifap);
+ return 1;
+ }
+
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