urldata: remove 'local_ip' from the connectdata struct

As the info is already stored in the transfer handle anyway, there's no
need to carry around a duplicate buffer for the life-time of the handle.

Closes #6534

lib/connect.c

@@ -610,14 +610,18 @@ static CURLcode trynextip(struct Curl_easy *data,
 
 /* Copies connection info into the transfer handle to make it available when
    the transfer handle is no longer associated with the connection. */
-void Curl_persistconninfo(struct Curl_easy *data, struct connectdata *conn)
+void Curl_persistconninfo(struct Curl_easy *data, struct connectdata *conn,
+                          char *local_ip, long local_port)
 {
   memcpy(data->info.conn_primary_ip, conn->primary_ip, MAX_IPADR_LEN);
-  memcpy(data->info.conn_local_ip, conn->local_ip, MAX_IPADR_LEN);
+  if(local_ip && local_ip[0])
+    memcpy(data->info.conn_local_ip, local_ip, MAX_IPADR_LEN);
+  else
+    data->info.conn_local_ip[0] = 0;
   data->info.conn_scheme = conn->handler->scheme;
   data->info.conn_protocol = conn->handler->protocol;
   data->info.conn_primary_port = conn->port;
-  data->info.conn_local_port = conn->local_port;
+  data->info.conn_local_port = local_port;
 }
 
 /* retrieves ip address and port from a sockaddr structure.
@@ -710,8 +714,8 @@ void Curl_conninfo_remote(struct Curl_easy *data,
 
 /* retrieves the start/end point information of a socket of an established
    connection */
-void Curl_conninfo_local(struct Curl_easy *data, struct connectdata *conn,
-                         curl_socket_t sockfd)
+void Curl_conninfo_local(struct Curl_easy *data, curl_socket_t sockfd,
+                         char *local_ip, long *local_port)
 {
 #ifdef HAVE_GETSOCKNAME
   char buffer[STRERROR_LEN];
@@ -726,7 +730,7 @@ void Curl_conninfo_local(struct Curl_easy *data, struct connectdata *conn,
     return;
   }
   if(!Curl_addr2string((struct sockaddr*)&ssloc, slen,
-                       conn->local_ip, &conn->local_port)) {
+                       local_ip, local_port)) {
     failf(data, "ssloc inet_ntop() failed with errno %d: %s",
           errno, Curl_strerror(errno, buffer, sizeof(buffer)));
     return;
@@ -743,15 +747,21 @@ void Curl_conninfo_local(struct Curl_easy *data, struct connectdata *conn,
 void Curl_updateconninfo(struct Curl_easy *data, struct connectdata *conn,
                          curl_socket_t sockfd)
 {
+  /* '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 = -1;
+
   if(conn->transport == TRNSPRT_TCP) {
     if(!conn->bits.reuse && !conn->bits.tcp_fastopen) {
       Curl_conninfo_remote(data, conn, sockfd);
-      Curl_conninfo_local(data, conn, sockfd);
+      Curl_conninfo_local(data, sockfd, local_ip, &local_port);
     }
   } /* end of TCP-only section */
 
   /* persist connection info in session handle */
-  Curl_persistconninfo(data, conn);
+  Curl_persistconninfo(data, conn, local_ip, local_port);
 }
 
 /* After a TCP connection to the proxy has been verified, this function does

lib/connect.h

@@ -80,9 +80,10 @@ void Curl_updateconninfo(struct Curl_easy *data, struct connectdata *conn,
                          curl_socket_t sockfd);
 void Curl_conninfo_remote(struct Curl_easy *data, struct connectdata *conn,
                           curl_socket_t sockfd);
-void Curl_conninfo_local(struct Curl_easy *data, struct connectdata *conn,
-                         curl_socket_t sockfd);
-void Curl_persistconninfo(struct Curl_easy *data, struct connectdata *conn);
+void Curl_conninfo_local(struct Curl_easy *data, curl_socket_t sockfd,
+                         char *local_ip, long *local_port);
+void Curl_persistconninfo(struct Curl_easy *data, struct connectdata *conn,
+                          char *local_ip, long local_port);
 int Curl_closesocket(struct Curl_easy *data, struct connectdata *conn,
                      curl_socket_t sock);
 

lib/url.c

@@ -3366,6 +3366,11 @@ static void reuse_conn(struct Curl_easy *data,
                        struct connectdata *old_conn,
                        struct connectdata *conn)
 {
+  /* '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 = -1;
 #ifndef CURL_DISABLE_PROXY
   Curl_free_idnconverted_hostname(&old_conn->http_proxy.host);
   Curl_free_idnconverted_hostname(&old_conn->socks_proxy.host);
@@ -3432,7 +3437,11 @@ static void reuse_conn(struct Curl_easy *data,
   old_conn->hostname_resolve = NULL;
 
   /* persist connection info in session handle */
-  Curl_persistconninfo(data, conn);
+  if(conn->transport == TRNSPRT_TCP) {
+    Curl_conninfo_local(data, conn->sock[FIRSTSOCKET],
+                        local_ip, &local_port);
+  }
+  Curl_persistconninfo(data, conn, local_ip, local_port);
 
   conn_reset_all_postponed_data(old_conn); /* free buffers */
 
@@ -3646,7 +3655,7 @@ static CURLcode create_conn(struct Curl_easy *data,
     /* this is supposed to be the connect function so we better at least check
        that the file is present here! */
     DEBUGASSERT(conn->handler->connect_it);
-    Curl_persistconninfo(data, conn);
+    Curl_persistconninfo(data, conn, NULL, -1);
     result = conn->handler->connect_it(data, &done);
 
     /* Setup a "faked" transfer that'll do nothing */

lib/urldata.h

@@ -977,13 +977,6 @@ struct connectdata {
 
   char primary_ip[MAX_IPADR_LEN];
 
-  /* '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 */
   char *options; /* options string, allocated */

lib/vquic/quiche.c

@@ -255,7 +255,7 @@ CURLcode Curl_quic_connect(struct Curl_easy *data,
           SOCKERRNO, Curl_strerror(SOCKERRNO, buffer, sizeof(buffer)));
     return CURLE_BAD_FUNCTION_ARGUMENT;
   }
-  Curl_persistconninfo(data, conn);
+  Curl_persistconninfo(data, conn, NULL, -1);
 
   /* for connection reuse purposes: */
   conn->ssl[FIRSTSOCKET].state = ssl_connection_complete;