X-Git-Url: https://git.distorted.org.uk/~mdw/secnet/blobdiff_plain/92ae57c54d1d725a6ff4e4e37fc1e20774261058..86420bb75f19f628ffd2d8ff9964e59ed99e3187:/site.c

diff --git a/site.c b/site.c
index 70cc316..dcac0ba 100644
--- a/site.c
+++ b/site.c
@@ -296,6 +296,7 @@ struct site {
 /* configuration information */
     string_t localname;
     string_t remotename;
+    bool_t keepalive;
     bool_t local_mobile, peer_mobile; /* Mobile client support */
     int32_t transport_peers_max;
     string_t tunname; /* localname<->remotename by default, used in logs */
@@ -304,6 +305,7 @@ struct site {
     uint32_t mtu_target;
     struct netlink_if *netlink;
     struct comm_if **comms;
+    struct comm_clientinfo **commclientinfos;
     int ncomms;
     struct resolver_if *resolver;
     struct log_if *log;
@@ -1146,6 +1148,10 @@ static bool_t process_msg0(struct site *st, struct buffer_if *msg0,
     case LABEL_MSG7:
 	/* We must forget about the current session. */
 	delete_keys(st,"request from peer",LOG_SEC);
+	/* probably, the peer is shutting down, and this is going to fail,
+	 * but we need to be trying to bring the link up again */
+	if (st->keepalive)
+	    initiate_key_setup(st,"peer requested key teardown",0);
 	return True;
     case LABEL_MSG9:
 	/* Deliver to netlink layer */
@@ -1178,6 +1184,22 @@ static void dump_packet(struct site *st, struct buffer_if *buf,
 	       ok?"":" - fail");
 }
 
+static bool_t comm_addr_sendmsg(struct site *st,
+				const struct comm_addr *dest,
+				struct buffer_if *buf)
+{
+    int i;
+    struct comm_clientinfo *commclientinfo = 0;
+
+    for (i=0; i < st->ncomms; i++) {
+	if (st->comms[i] == dest->comm) {
+	    commclientinfo = st->commclientinfos[i];
+	    break;
+	}
+    }
+    return dest->comm->sendmsg(dest->comm->st, buf, dest, commclientinfo);
+}
+
 static uint32_t site_status(void *st)
 {
     return 0;
@@ -1429,6 +1451,9 @@ static void enter_state_run(struct site *st)
     memset(st->dhsecret,0,st->dh->len);
     memset(st->sharedsecret,0,st->sharedsecretlen);
     set_link_quality(st);
+
+    if (st->keepalive && !current_valid(st))
+	initiate_key_setup(st, "keepalive", 0);
 }
 
 static bool_t ensure_resolving(struct site *st)
@@ -1602,7 +1627,7 @@ static void generate_send_prod(struct site *st,
     slog(st,LOG_SETUP_INIT,"prodding peer for key exchange");
     st->allow_send_prod=0;
     generate_prod(st,&st->scratch);
-    bool_t ok = source->comm->sendmsg(source->comm->st, &st->scratch, source);
+    bool_t ok = comm_addr_sendmsg(st, source, &st->scratch);
     dump_packet(st,&st->scratch,source,False,ok);
 }
 
@@ -1967,6 +1992,8 @@ static list_t *site_apply(closure_t *self, struct cloc loc, dict_t *context,
     st->localname=dict_read_string(dict, "local-name", True, "site", loc);
     st->remotename=dict_read_string(dict, "name", True, "site", loc);
 
+    st->keepalive=dict_read_bool(dict,"keepalive",False,"site",loc,False);
+
     st->peer_mobile=dict_read_bool(dict,"mobile",False,"site",loc,False);
     st->local_mobile=
 	dict_read_bool(dict,"local-mobile",False,"site",loc,False);
@@ -2016,6 +2043,14 @@ static list_t *site_apply(closure_t *self, struct cloc loc, dict_t *context,
 
     GET_CLOSURE_LIST("comm",comms,ncomms,CL_COMM);
 
+    NEW_ARY(st->commclientinfos, st->ncomms);
+    dict_t *comminfo = dict_read_dict(dict,"comm-info",False,"site",loc);
+    for (i=0; i<st->ncomms; i++) {
+	st->commclientinfos[i] =
+	    !comminfo ? 0 :
+	    st->comms[i]->clientinfo(st->comms[i],comminfo,loc);
+    }
+
     st->resolver=find_cl_if(dict,"resolver",CL_RESOLVER,True,"site",loc);
     st->log=find_cl_if(dict,"log",CL_LOG,True,"site",loc);
     st->random=find_cl_if(dict,"random",CL_RANDOMSRC,True,"site",loc);
@@ -2349,8 +2384,7 @@ void transport_xmit(struct site *st, transport_peers *peers,
     int nfailed=0;
     for (slot=0; slot<peers->npeers; slot++) {
 	transport_peer *peer=&peers->peers[slot];
-	bool_t ok =
-	    peer->addr.comm->sendmsg(peer->addr.comm->st, buf, &peer->addr);
+	bool_t ok = comm_addr_sendmsg(st, &peer->addr, buf);
 	if (candebug)
 	    dump_packet(st, buf, &peer->addr, False, ok);
 	if (!ok) {