fix getinfo CURLINFO_LOCAL* for reused connections (take 2)

lib/connect.c

@@ -532,6 +532,16 @@ static CURLcode trynextip(struct connectdata *conn,
   return CURLE_COULDNT_CONNECT;
 }
 
+/* Copies connection info into the session handle to make it available
+   when the session handle is no longer associated with a connection. */
+void Curl_persistconninfo(struct connectdata *conn)
+{
+  memcpy(conn->data->info.conn_primary_ip, conn->primary_ip, MAX_IPADR_LEN);
+  memcpy(conn->data->info.conn_local_ip, conn->local_ip, MAX_IPADR_LEN);
+  conn->data->info.conn_primary_port = conn->primary_port;
+  conn->data->info.conn_local_port = conn->local_port;
+}
+
 /* retrieves ip address and port from a sockaddr structure */
 static bool getaddressinfo(struct sockaddr* sa, char* addr,
                            long* port)
@@ -587,43 +597,45 @@ void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd)
   struct Curl_sockaddr_storage ssrem;
   struct Curl_sockaddr_storage ssloc;
   struct SessionHandle *data = conn->data;
-  struct PureInfo *info = &conn->data->info;
 
-  if(conn->bits.reuse)
-    /* reusing same connection */
-    return;
+  if(!conn->bits.reuse) {
 
-  len = sizeof(struct Curl_sockaddr_storage);
-  if(getpeername(sockfd, (struct sockaddr*) &ssrem, &len)) {
-    error = SOCKERRNO;
-    failf(data, "getpeername() failed with errno %d: %s",
-          error, Curl_strerror(conn, error));
-    return;
-  }
+    len = sizeof(struct Curl_sockaddr_storage);
+    if(getpeername(sockfd, (struct sockaddr*) &ssrem, &len)) {
+      error = SOCKERRNO;
+      failf(data, "getpeername() failed with errno %d: %s",
+            error, Curl_strerror(conn, error));
+      return;
+    }
 
-  len = sizeof(struct Curl_sockaddr_storage);
-  if(getsockname(sockfd, (struct sockaddr*) &ssloc, &len)) {
-    error = SOCKERRNO;
-    failf(data, "getsockname() failed with errno %d: %s",
-          error, Curl_strerror(conn, error));
-    return;
-  }
+    len = sizeof(struct Curl_sockaddr_storage);
+    if(getsockname(sockfd, (struct sockaddr*) &ssloc, &len)) {
+      error = SOCKERRNO;
+      failf(data, "getsockname() failed with errno %d: %s",
+            error, Curl_strerror(conn, error));
+      return;
+    }
 
-  if(!getaddressinfo((struct sockaddr*)&ssrem,
-                      info->primary_ip, &info->primary_port)) {
-    error = ERRNO;
-    failf(data, "ssrem inet_ntop() failed with errno %d: %s",
-          error, Curl_strerror(conn, error));
-    return;
-  }
+    if(!getaddressinfo((struct sockaddr*)&ssrem,
+                        conn->primary_ip, &conn->primary_port)) {
+      error = ERRNO;
+      failf(data, "ssrem inet_ntop() failed with errno %d: %s",
+            error, Curl_strerror(conn, error));
+      return;
+    }
+
+    if(!getaddressinfo((struct sockaddr*)&ssloc,
+                       conn->local_ip, &conn->local_port)) {
+      error = ERRNO;
+      failf(data, "ssloc inet_ntop() failed with errno %d: %s",
+            error, Curl_strerror(conn, error));
+      return;
+    }
 
-  if(!getaddressinfo((struct sockaddr*)&ssloc,
-                     info->local_ip, &info->local_port)) {
-    error = ERRNO;
-    failf(data, "ssloc inet_ntop() failed with errno %d: %s",
-          error, Curl_strerror(conn, error));
-    return;
   }
+
+  /* persist connection info in session handle */
+  Curl_persistconninfo(conn);
 }
 
 /*
@@ -865,14 +877,16 @@ singleipconnect(struct connectdata *conn,
 
   /* store remote address and port used in this connection attempt */
   if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
-                     data->info.primary_ip, &data->info.primary_port)) {
+                     conn->primary_ip, &conn->primary_port)) {
     error = ERRNO;
     failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
           error, Curl_strerror(conn, error));
   }
-  strcpy(conn->ip_addr_str, data->info.primary_ip);
+  memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
   infof(data, "  Trying %s... ", conn->ip_addr_str);
 
+  Curl_persistconninfo(conn);
+
 #ifdef ENABLE_IPV6
   if(addr.family == AF_INET6)
     conn->bits.ipv6 = TRUE;

lib/connect.h

@@ -69,4 +69,6 @@ void Curl_sndbufset(curl_socket_t sockfd);
 
 void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd);
 
+void Curl_persistconninfo(struct connectdata *conn);
+
 #endif

lib/getinfo.c

@@ -67,6 +67,11 @@ CURLcode Curl_initinfo(struct SessionHandle *data)
   info->request_size = 0;
   info->numconnects = 0;
 
+  info->conn_primary_ip[0] = '\0';
+  info->conn_local_ip[0] = '\0';
+  info->conn_primary_port = 0;
+  info->conn_local_port = 0;
+
   return CURLE_OK;
 }
 
@@ -233,20 +238,20 @@ CURLcode Curl_getinfo(struct SessionHandle *data, CURLINFO info, ...)
     break;
   case CURLINFO_PRIMARY_IP:
     /* Return the ip address of the most recent (primary) connection */
-    *param_charp = data->info.primary_ip;
+    *param_charp = data->info.conn_primary_ip;
     break;
   case CURLINFO_PRIMARY_PORT:
     /* Return the (remote) port of the most recent (primary) connection */
-    *param_longp = data->info.primary_port;
+    *param_longp = data->info.conn_primary_port;
     break;
   case CURLINFO_LOCAL_IP:
     /* Return the source/local ip address of the most recent (primary)
        connection */
-    *param_charp = data->info.local_ip;
+    *param_charp = data->info.conn_local_ip;
     break;
   case CURLINFO_LOCAL_PORT:
     /* Return the local port of the most recent (primary) connection */
-    *param_longp = data->info.local_port;
+    *param_longp = data->info.conn_local_port;
     break;
   case CURLINFO_CERTINFO:
     /* Return the a pointer to the certinfo struct. Not really an slist

lib/url.c

@@ -4599,7 +4599,8 @@ static void reuse_conn(struct connectdata *old_conn,
   else
     free(old_conn->host.rawalloc); /* free the newly allocated name buffer */
 
-  strcpy(conn->ip_addr_str, old_conn->ip_addr_str);
+  /* persist connection info in session handle */
+  Curl_persistconninfo(conn);
 
   /* re-use init */
   conn->bits.reuse = TRUE; /* yes, we're re-using here */

lib/urldata.h

@@ -757,6 +757,23 @@ struct connectdata {
   unsigned short remote_port; /* what remote port to connect to,
                                  not the proxy port! */
 
+  /* 'primary_ip' and 'primary_port' get filled with peer's numerical
+     ip address and port number whenever an outgoing connection is
+     *attemted* from the primary socket to a remote address. When more
+     than one address is tried for a connection these will hold data
+     for the last attempt. When the connection is actualy established
+     these are updated with data which comes directly from the socket. */
+
+  char primary_ip[MAX_IPADR_LEN];
+  long primary_port;
+
+  /* 'local_ip' and 'local_port' get filled with local's numerical
+     ip address and port number whenever an outgoing connection is
+     **established** from the primary socket to a remote address. */
+
+  char local_ip[MAX_IPADR_LEN];
+  long local_port;
+
   char *user;    /* user name string, allocated */
   char *passwd;  /* password string, allocated */
 
@@ -915,22 +932,19 @@ struct PureInfo {
   char *contenttype; /* the content type of the object */
   char *wouldredirect; /* URL this would've been redirected to if asked to */
 
-  /* 'primary_ip' and 'primary_port' get filled with peer's numerical
-     ip address and port number whenever an outgoing connection is
-     *attemted* from the primary socket to a remote address. When more
-     than one address is tried for a connection these will hold data
-     for the last attempt. When the connection is actualy established
-     these are updated with data which comes directly from the socket. */
+  /* PureInfo members 'conn_primary_ip', 'conn_primary_port', 'conn_local_ip'
+     and, 'conn_local_port' are copied over from the connectdata struct in
+     order to allow curl_easy_getinfo() to return this information even when
+     the session handle is no longer associated with a connection, and also
+     allow curl_easy_reset() to clear this information from the session handle
+     without disturbing information which is still alive, and that might be
+     reused, in the connection cache. */
 
-  char primary_ip[MAX_IPADR_LEN];
-  long primary_port;
+  char conn_primary_ip[MAX_IPADR_LEN];
+  long conn_primary_port;
 
-  /* 'local_ip' and 'local_port' get filled with local's numerical
-     ip address and port number whenever an outgoing connection is
-     **established** from the primary socket to a remote address. */
-
-  char local_ip[MAX_IPADR_LEN];
-  long local_port;
+  char conn_local_ip[MAX_IPADR_LEN];
+  long conn_local_port;
 
   struct curl_certinfo certs; /* info about the certs, only populated in
                                  OpenSSL builds. Asked for with