4 files changed, 63 insertions, 30 deletions

diff --git a/sysdep/linux/krt-sys.h b/sysdep/linux/krt-sys.h
index cdee7fe3..7b3043a7 100644
--- a/sysdep/linux/krt-sys.h
+++ b/sysdep/linux/krt-sys.h
@@ -15,7 +15,7 @@
 struct kif_params {
 };
 
-struct kif_status {
+struct kif_state {
 };
 
 
@@ -36,7 +36,7 @@ struct krt_params {
   int table_id;				/* Kernel table ID we sync with */
 };
 
-struct krt_status {
+struct krt_state {
 };
 
 
diff --git a/sysdep/linux/netlink.Y b/sysdep/linux/netlink.Y
index 51689ff9..b0e35151 100644
--- a/sysdep/linux/netlink.Y
+++ b/sysdep/linux/netlink.Y
@@ -10,13 +10,13 @@ CF_HDR
 
 CF_DECLS
 
-CF_KEYWORDS(ASYNC, KERNEL, TABLE, KRT_PREFSRC, KRT_REALM)
+CF_KEYWORDS(KERNEL, TABLE, KRT_PREFSRC, KRT_REALM)
 
 CF_GRAMMAR
 
-CF_ADDTO(kern_proto, kern_proto nl_item ';')
+CF_ADDTO(kern_proto, kern_proto kern_sys_item ';')
 
-nl_item:
+kern_sys_item:
    KERNEL TABLE expr {
 	if ($3 <= 0 || $3 >= NL_NUM_TABLES)
 	  cf_error("Kernel routing table number out of range");
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index 791f715e..90443ed6 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -7,6 +7,7 @@
  */
 
 #include <stdio.h>
+#include <unistd.h>
 #include <fcntl.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
@@ -843,9 +844,11 @@ nl_parse_route(struct nlmsghdr *h, int scan)
 	  memcpy(&ra.gw, RTA_DATA(a[RTA_GATEWAY]), sizeof(ra.gw));
 	  ipa_ntoh(ra.gw);
 
+#ifdef IPV6
 	  /* Silently skip strange 6to4 routes */
 	  if (ipa_in_net(ra.gw, IPA_NONE, 96))
 	    return;
+#endif
 
 	  ng = neigh_find2(&p->p, &ra.gw, ra.iface,
 			   (i->rtm_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0);
@@ -1038,11 +1041,9 @@ nl_open_async(void)
   sock *sk;
   struct sockaddr_nl sa;
   int fd;
-  static int nl_open_tried = 0;
 
-  if (nl_open_tried)
+  if (nl_async_sk)
     return;
-  nl_open_tried = 1;
 
   DBG("KRT: Opening async netlink socket\n");
 
@@ -1063,18 +1064,18 @@ nl_open_async(void)
   if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0)
     {
       log(L_ERR "Unable to bind asynchronous rtnetlink socket: %m");
+      close(fd);
       return;
     }
 
+  nl_async_rx_buffer = xmalloc(NL_RX_SIZE);
+
   sk = nl_async_sk = sk_new(krt_pool);
   sk->type = SK_MAGIC;
   sk->rx_hook = nl_async_hook;
   sk->fd = fd;
   if (sk_open(sk))
     bug("Netlink: sk_open failed");
-
-  if (!nl_async_rx_buffer)
-    nl_async_rx_buffer = xmalloc(NL_RX_SIZE);
 }
 
 /*
@@ -1084,19 +1085,18 @@ nl_open_async(void)
 static u8 nl_cf_table[(NL_NUM_TABLES+7) / 8];
 
 void
-krt_sys_start(struct krt_proto *p, int first)
+krt_sys_start(struct krt_proto *p)
 {
   nl_table_map[KRT_CF->sys.table_id] = p;
-  if (first)
-    {
-      nl_open();
-      nl_open_async();
-    }
+
+  nl_open();
+  nl_open_async();
 }
 
 void
-krt_sys_shutdown(struct krt_proto *p UNUSED, int last UNUSED)
+krt_sys_shutdown(struct krt_proto *p UNUSED)
 {
+  nl_table_map[KRT_CF->sys.table_id] = NULL;
 }
 
 int
diff --git a/sysdep/linux/sysio.h b/sysdep/linux/sysio.h
index 90b3ebd9..250ed586 100644
--- a/sysdep/linux/sysio.h
+++ b/sysdep/linux/sysio.h
@@ -194,17 +194,22 @@ sk_set_md5_auth_int(sock *s, sockaddr *sa, char *passwd)
 /* RX/TX packet info handling for IPv4 */
 /* Mostly similar to standardized IPv6 code */
 
-#define CMSG_RX_SPACE CMSG_SPACE(sizeof(struct in_pktinfo))
+#define CMSG_RX_SPACE (CMSG_SPACE(sizeof(struct in_pktinfo)) + CMSG_SPACE(sizeof(int)))
 #define CMSG_TX_SPACE CMSG_SPACE(sizeof(struct in_pktinfo))
 
 static char *
 sysio_register_cmsgs(sock *s)
 {
   int ok = 1;
+
   if ((s->flags & SKF_LADDR_RX) &&
-      setsockopt(s->fd, IPPROTO_IP, IP_PKTINFO, &ok, sizeof(ok)) < 0)
+      (setsockopt(s->fd, IPPROTO_IP, IP_PKTINFO, &ok, sizeof(ok)) < 0))
     return "IP_PKTINFO";
 
+  if ((s->flags & SKF_TTL_RX) &&
+      (setsockopt(s->fd, IPPROTO_IP, IP_RECVTTL, &ok, sizeof(ok)) < 0))
+    return "IP_RECVTTL";
+
   return NULL;
 }
 
@@ -213,25 +218,34 @@ sysio_process_rx_cmsgs(sock *s, struct msghdr *msg)
 {
   struct cmsghdr *cm;
   struct in_pktinfo *pi = NULL;
-
-  if (!(s->flags & SKF_LADDR_RX))
-    return;
+  int *ttl = NULL;
 
   for (cm = CMSG_FIRSTHDR(msg); cm != NULL; cm = CMSG_NXTHDR(msg, cm))
+  {
+    if (cm->cmsg_level == IPPROTO_IP && cm->cmsg_type == IP_PKTINFO)
+      pi = (struct in_pktinfo *) CMSG_DATA(cm);
+
+    if (cm->cmsg_level == IPPROTO_IP && cm->cmsg_type == IP_TTL)
+      ttl = (int *) CMSG_DATA(cm);
+  }
+
+  if (s->flags & SKF_LADDR_RX)
+  {
+    if (pi)
     {
-      if (cm->cmsg_level == IPPROTO_IP && cm->cmsg_type == IP_PKTINFO)
-	pi = (struct in_pktinfo *) CMSG_DATA(cm);
+      get_inaddr(&s->laddr, &pi->ipi_addr);
+      s->lifindex = pi->ipi_ifindex;
     }
-
-  if (!pi)
+    else
     {
       s->laddr = IPA_NONE;
       s->lifindex = 0;
-      return;
     }
+  }
+
+  if (s->flags & SKF_TTL_RX)
+    s->ttl = ttl ? *ttl : -1;
 
-  get_inaddr(&s->laddr, &pi->ipi_addr);
-  s->lifindex = pi->ipi_ifindex;
   return;
 }
 
@@ -310,3 +324,22 @@ sk_set_min_ttl6(sock *s, int ttl)
 }
 
 #endif
+
+
+#ifndef IPV6_TCLASS
+#define IPV6_TCLASS 67
+#endif
+
+int sk_priority_control = 7;
+
+static int
+sk_set_priority(sock *s, int prio)
+{
+  if (setsockopt(s->fd, SOL_SOCKET, SO_PRIORITY, &prio, sizeof(prio)) < 0)
+  {
+    log(L_WARN "sk_set_priority: setsockopt: %m");
+    return -1;
+  }
+
+  return 0;
+}