Build system: Fix check for <linux/if_tun.h> and remove our copy

[secnet.git] / udp.c

diff --git a/udp.c b/udp.c
index a2bb90785bbbfcacf5721d8bb35f0cbed319f948..26853b70c218b5349e9e821ba14a2986e2f27f72 100644 (file)
--- a/udp.c
+++ b/udp.c
@@ -30,6 +30,8 @@ static comm_sendmsg_fn udp_sendmsg;
 struct udp {
     struct udpcommon uc;
     struct udpsocks socks;
+    bool_t addr_configured;
+    unsigned counter;
 };
 
 /*
@@ -52,7 +54,8 @@ static const char *udp_addr_to_string(void *commst, const struct comm_addr *ca)
     int ix=ca->ix>=0 ? ca->ix : 0;
 
     assert(ix>=0 && ix<socks->n_socks);
-    snprintf(sbuf, sizeof(sbuf), "udp:%s%s-%s",
+    snprintf(sbuf, sizeof(sbuf), "udp#%u@l%d:%s%s-%s",
+            st->counter, st->uc.cc.loc.line,
             iaddr_to_string(&socks->socks[ix].addr),
             ca->ix<0 && socks->n_socks>1 ? "&" : "",
             iaddr_to_string(&ca->ia));
@@ -84,20 +87,23 @@ const char *af_name(int af)
 
 void udp_sock_experienced(struct log_if *lg, struct udpcommon *uc,
                          struct udpsocks *socks, struct udpsock *us,
-                         bool_t recvsend, int af,
+                         const union iaddr *dest, int af,
                          int r, int errnoval)
 {
     bool_t success=r>=0;
-    if (us->experienced[recvsend][af][success]++)
+    if (us->experienced[!!dest][af][success]++)
        return;
     lg_perror(lg, uc->cc.cl.description, &uc->cc.loc,
              success ? M_INFO : M_WARNING,
              success ? 0 : errnoval,
-             "%s %s experiencing some %s %s%s%s",
+             "%s %s experiencing some %s %s%s%s%s%s%s",
              socks->desc,iaddr_to_string(&us->addr),
              success?"success":"trouble",
-             recvsend?"transmitting":"receiving",
-             af?" ":"", af?af_name(af):"");
+             dest?"transmitting":"receiving",
+             af?" ":"", af?af_name(af):"",
+             dest?" (to ":"",
+             dest?iaddr_to_string(dest):"",
+             dest?")":"");
 }
 
 static void udp_socks_afterpoll(void *state, struct pollfd *fds, int nfds)
@@ -197,7 +203,7 @@ static bool_t udp_sendmsg(void *commst, struct buffer_if *buf,
        memcpy(sa+6,&dest->ia.sin.sin_port,2);
        int r=sendto(us->fd,sa,buf->size+8,0,&uc->proxy.sa,
               iaddr_socklen(&uc->proxy));
-       udp_sock_experienced(0,uc,socks,us, 1,0, r,errno);
+       udp_sock_experienced(0,uc,socks,us, &dest->ia,0, r,errno);
        buf_unprepend(buf,8);
     } else {
        int i,r;
@@ -210,7 +216,7 @@ static bool_t udp_sendmsg(void *commst, struct buffer_if *buf,
                continue;
            r=sendto(us->fd, buf->start, buf->size, 0,
                     &dest->ia.sa, iaddr_socklen(&dest->ia));
-           udp_sock_experienced(0,uc,socks,us, 1,af, r,errno);
+           udp_sock_experienced(0,uc,socks,us, &dest->ia,af, r,errno);
            if (r>=0) return True;
            if (!(errno==EAFNOSUPPORT || errno==ENETUNREACH))
                /* who knows what that error means? */
@@ -393,8 +399,14 @@ static void udp_phase_hook(void *sst, uint32_t new_phase)
     struct udpsocks *socks=&st->socks;
     struct udpcommon *uc=&st->uc;
     int i;
-    for (i=0; i<socks->n_socks; i++)
-       udp_make_socket(uc,&socks->socks[i],M_FATAL);
+    bool_t anydone=0;
+
+    for (i=0; i<socks->n_socks; i++) {
+       bool_t required=st->addr_configured
+           || (!anydone && i==socks->n_socks-1);
+       anydone += udp_make_socket(uc,&socks->socks[i],
+                                  required ? M_FATAL : M_WARNING);
+    }
 
     udp_socks_register(uc,socks, uc->use_proxy ? "proxy" : "socket");
 
@@ -404,6 +416,8 @@ static void udp_phase_hook(void *sst, uint32_t new_phase)
 static list_t *udp_apply(closure_t *self, struct cloc loc, dict_t *context,
                         list_t *args)
 {
+    static unsigned counter;
+
     struct udp *st;
     list_t *caddrl;
     list_t *l;
@@ -418,6 +432,8 @@ static list_t *udp_apply(closure_t *self, struct cloc loc, dict_t *context,
     struct udpsocks *socks=&st->socks;
     struct commcommon *cc=&uc->cc;
 
+    st->counter=counter++;
+
     union iaddr defaultaddrs[] = {
 #ifdef CONFIG_IPV6
        { .sin6 = { .sin6_family=AF_INET6,
@@ -430,14 +446,16 @@ static list_t *udp_apply(closure_t *self, struct cloc loc, dict_t *context,
     };
 
     caddrl=dict_lookup(d,"address");
-    socks->n_socks=caddrl ? list_length(caddrl) : (int)ARRAY_SIZE(defaultaddrs);
+    st->addr_configured=!!caddrl;
+    socks->n_socks=st->addr_configured ? list_length(caddrl)
+       : (int)ARRAY_SIZE(defaultaddrs);
     if (socks->n_socks<=0 || socks->n_socks>UDP_MAX_SOCKETS)
        cfgfatal(cc->loc,"udp","`address' must be 1..%d addresses",
                 UDP_MAX_SOCKETS);
 
     for (i=0; i<socks->n_socks; i++) {
        struct udpsock *us=&socks->socks[i];
-       if (!list_length(caddrl)) {
+       if (!st->addr_configured) {
            us->addr=defaultaddrs[i];
        } else {
            string_item_to_iaddr(list_elem(caddrl,i),uc->port,&us->addr,"udp");