- Added CURLINFO_PRIMARY_IP as a new information retrievable with

curl_easy_getinfo. It returns a pointer to a string with the most recently
  used IP address. Modified test case 500 to also verify this feature. The
  implementing of this feature was sponsored by Lenny Rachitsky at NeuStar.

CHANGES

@@ -7,6 +7,12 @@
                                   Changelog
 
 
+Daniel Stenberg (6 Jun 2008)
+- Added CURLINFO_PRIMARY_IP as a new information retrievable with
+  curl_easy_getinfo. It returns a pointer to a string with the most recently
+  used IP address. Modified test case 500 to also verify this feature. The
+  implementing of this feature was sponsored by Lenny Rachitsky at NeuStar.
+
 Version 7.18.2 (4 June 2008)
 
 Daniel Fandrich (3 Jun 2008)

RELEASE-NOTES

@@ -10,7 +10,7 @@ Curl and libcurl 7.18.3
 
 This release includes the following changes:
  
- o 
+ o Added CURLINFO_PRIMARY_IP
 
 This release includes the following bugfixes:
 
@@ -31,6 +31,6 @@ New curl mirrors:
 This release would not have looked like this without help, code, reports and
 advice from friends like these:
 
-
+ Lenny Rachitsky
 
         Thanks! (and sorry if I forgot to mention someone)

docs/libcurl/curl_easy_getinfo.3

@@ -159,6 +159,12 @@ counted).  Combined with \fICURLINFO_REDIRECT_COUNT\fP you are able to know
 how many times libcurl successfully reused existing connection(s) or not.  See
 the Connection Options of \fIcurl_easy_setopt(3)\fP to see how libcurl tries
 to make persistent connections to save time.  (Added in 7.12.3)
+.IP CURLINFO_PRIMARY_IP
+Pass a pointer to a char pointer to receive the pointer to a zero-terminated
+string holding the IP address of the most recent connection done with this
+\fBcurl\fP handle. This string may be IPv6 if that's enabled. Note that you
+get a pointer to a memory area that will be re-used at next request so you
+need to copy the string if you want to keep the information. (Added in 7.18.3)
 .IP CURLINFO_COOKIELIST
 Pass a pointer to a 'struct curl_slist *' to receive a linked-list of all
 cookies cURL knows (expired ones, too). Don't forget to

include/curl/curl.h

@@ -1596,9 +1596,10 @@ typedef enum {
   CURLINFO_LASTSOCKET       = CURLINFO_LONG   + 29,
   CURLINFO_FTP_ENTRY_PATH   = CURLINFO_STRING + 30,
   CURLINFO_REDIRECT_URL     = CURLINFO_STRING + 31,
+  CURLINFO_PRIMARY_IP       = CURLINFO_STRING + 32,
   /* Fill in new entries below here! */
 
-  CURLINFO_LASTONE          = 31
+  CURLINFO_LASTONE          = 32
 } CURLINFO;
 
 /* CURLINFO_RESPONSE_CODE is the new name for the option previously known as

lib/connect.c

@@ -775,9 +775,12 @@ singleipconnect(struct connectdata *conn,
   /* FIXME: do we have Curl_printable_address-like with struct sockaddr* as
      argument? */
 #if defined(HAVE_SYS_UN_H) && defined(AF_UNIX)
-  if(addr->family==AF_UNIX)
+  if(addr->family==AF_UNIX) {
     infof(data, "  Trying %s... ",
           ((const struct sockaddr_un*)(&addr->addr))->sun_path);
+    snprintf(data->info.ip, MAX_IPADR_LEN, "%s",
+             ((const struct sockaddr_un*)(&addr->addr))->sun_path);
+  }
   else
 #endif
   {
@@ -789,8 +792,10 @@ singleipconnect(struct connectdata *conn,
       iptoprint = &((const struct sockaddr_in*)(&addr->addr))->sin_addr;
 
     if(Curl_inet_ntop(addr->family, iptoprint, addr_buf,
-                      sizeof(addr_buf)) != NULL)
+                      sizeof(addr_buf)) != NULL) {
       infof(data, "  Trying %s... ", addr_buf);
+      snprintf(data->info.ip, MAX_IPADR_LEN, "%s", addr_buf);
+    }
   }
 
   if(data->set.tcp_nodelay)

lib/getinfo.c

@@ -210,6 +210,10 @@ CURLcode Curl_getinfo(struct SessionHandle *data, CURLINFO info, ...)
        option had been enabled! */
     *param_charp = data->info.wouldredirect;
     break;
+  case CURLINFO_PRIMARY_IP:
+    /* Return the ip address of the most recent (primary) connection */
+    *param_charp = data->info.ip;
+    break;
   default:
     return CURLE_BAD_FUNCTION_ARGUMENT;
   }

lib/urldata.h

@@ -48,6 +48,8 @@
 #define CURL_DEFAULT_USER "anonymous"
 #define CURL_DEFAULT_PASSWORD "ftp@example.com"
 
+#define MAX_IPADR_LEN (4*9) /* should be enough to hold the longest ipv6 one */
+
 #include "cookie.h"
 #include "formdata.h"
 
@@ -1036,6 +1038,9 @@ struct PureInfo {
   long numconnects; /* how many new connection did libcurl created */
   char *contenttype; /* the content type of the object */
   char *wouldredirect; /* URL this would've been redirected to if asked to */
+  char ip[MAX_IPADR_LEN]; /* this buffer gets the numerical ip version stored
+                             at the connect *attempt* so it will get the last
+                             tried connect IP even on failures */
 };
 
 

tests/data/test500

@@ -32,13 +32,16 @@ lib500
 simple libcurl HTTP GET tool
  </name>
  <command>
-http://%HOSTIP:%HTTPPORT/500
+http://%HOSTIP:%HTTPPORT/500 log/ip500
 </command>
 </client>
 
 #
 # Verify data after the test has been "shot"
 <verify>
+<file name="log/ip500" mode="text">
+IP: %HOSTIP
+</file>
 <protocol>
 GET /500 HTTP/1.1
 Host: %HOSTIP:%HTTPPORT

tests/libtest/lib500.c

@@ -14,6 +14,7 @@ int test(char *URL)
 {
   CURLcode res;
   CURL *curl;
+  char *ipstr=NULL;
 
   if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
     fprintf(stderr, "curl_global_init() failed\n");
@@ -31,7 +32,17 @@ int test(char *URL)
 
   res = curl_easy_perform(curl);
 
-  curl_easy_cleanup(curl);  
+  if(!res) {
+    FILE *moo;
+    res = curl_easy_getinfo(curl, CURLINFO_PRIMARY_IP, &ipstr);
+    moo = fopen(libtest_arg2, "wb");
+    if(moo) {
+      fprintf(moo, "IP: %s\n", ipstr);
+      fclose(moo);
+    }
+  }
+
+  curl_easy_cleanup(curl);
   curl_global_cleanup();
 
   return (int)res;