tcpip: connect tries all getaddrinfo addresses YAZ-743

diff --git a/src/tcpip.c b/src/tcpip.c
index 57f15af..0fde196 100644 (file)
--- a/src/tcpip.c
+++ b/src/tcpip.c
@@ -119,6 +119,7 @@ typedef struct tcpip_state
     int (*complete)(const char *buf, int len); /* length/complete. */
 #if HAVE_GETADDRINFO
     struct addrinfo *ai;
+    struct addrinfo *ai_this;
 #else
     struct sockaddr_in addr;  /* returned by cs_straddr */
 #endif
@@ -423,13 +424,16 @@ void *tcpip_straddr(COMSTACK h, const char *str)
     if (sp->ai && h->state == CS_ST_UNBND)
     {
         int s = -1;
-        for (ai = sp->ai; ai; ai = ai->ai_next)
+        if (ipv6_only >= 0)
         {
-            if (ai->ai_family == AF_INET6)
+            for (ai = sp->ai; ai; ai = ai->ai_next)
             {
-                s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
-                if (s != -1)
-                    break;
+                if (ai->ai_family == AF_INET6)
+                {
+                    s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+                    if (s != -1)
+                        break;
+                }
             }
         }
         if (s == -1)
@@ -443,6 +447,8 @@ void *tcpip_straddr(COMSTACK h, const char *str)
         }
         if (s == -1)
             return 0;
+        fprintf(stderr, "First socket fd=%d\n", s);
+        sp->ai_this = ai;
         assert(ai);
         h->iofile = s;
         if (ai->ai_family == AF_INET6 && ipv6_only >= 0 &&
@@ -494,6 +500,36 @@ int tcpip_more(COMSTACK h)
     return sp->altlen && (*sp->complete)(sp->altbuf, sp->altlen);
 }
 
+static int cont_connect(COMSTACK h)
+{
+#if HAVE_GETADDRINFO
+    tcpip_state *sp = (tcpip_state *)h->cprivate;
+    struct addrinfo *ai = sp->ai_this;
+    while (ai && (ai = ai->ai_next))
+    {
+        int s;
+        s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+        if (s != -1)
+        {
+#ifdef WIN32
+            closesocket(h->iofile);
+#else
+            close(h->iofile);
+#endif
+            fprintf(stderr, "Other socket call fd=%d\n", s);
+            h->state = CS_ST_UNBND;
+            h->iofile = s;
+            sp->ai_this = ai;
+            tcpip_set_blocking(h, h->flags);
+            return tcpip_connect(h, ai);
+        }
+#endif
+    }
+    h->cerrno = CSYSERR;
+    return -1;
+}
+
+
 /*
  * connect(2) will block (sometimes) - nothing we can do short of doing
  * weird things like spawning subprocesses or threading or some weird junk
@@ -503,7 +539,6 @@ int tcpip_connect(COMSTACK h, void *address)
 {
 #if HAVE_GETADDRINFO
     struct addrinfo *ai = (struct addrinfo *) address;
-    tcpip_state *sp = (tcpip_state *)h->cprivate;
 #else
     struct sockaddr_in *add = (struct sockaddr_in *) address;
 #endif
@@ -517,8 +552,6 @@ int tcpip_connect(COMSTACK h, void *address)
     }
 #if HAVE_GETADDRINFO
     r = connect(h->iofile, ai->ai_addr, ai->ai_addrlen);
-    freeaddrinfo(sp->ai);
-    sp->ai = 0;
 #else
     r = connect(h->iofile, (struct sockaddr *) add, sizeof(*add));
 #endif
@@ -535,14 +568,14 @@ int tcpip_connect(COMSTACK h, void *address)
 #else
         if (yaz_errno() == EINPROGRESS)
         {
+            fprintf(stderr, "Pending fd=%d\n", h->iofile);
             h->event = CS_CONNECT;
             h->state = CS_ST_CONNECTING;
             h->io_pending = CS_WANT_WRITE|CS_WANT_READ;
             return 1;
         }
 #endif
-        h->cerrno = CSYSERR;
-        return -1;
+        return cont_connect(h);
     }
     h->event = CS_CONNECT;
     h->state = CS_ST_CONNECTING;
@@ -1159,8 +1192,7 @@ int tcpip_put(COMSTACK h, char *buf, int size)
                 h->io_pending = CS_WANT_WRITE;
                 return 1;
             }
-            h->cerrno = CSYSERR;
-            return -1;
+            return cont_connect(h);
         }
         state->written += res;
         TRC(fprintf(stderr, "  Wrote %d, written=%d, nbytes=%d\n",