Emulate inet_{pton,ntop} on systems that don't provide it.

Modules/socketmodule.c

@@ -208,6 +208,11 @@ Socket methods:
    in those files, though, which will never compile on Windows. */
 #ifndef MS_WINDOWS
 
+#ifndef HAVE_INET_PTON
+int inet_pton (int af, const char *src, void *dst);
+char *inet_ntop(int af, void *src, char *dst, socklen_t size);
+#endif
+
 /* I know this is a bad practice, but it is the easiest... */
 #ifndef HAVE_GETADDRINFO
 #include "getaddrinfo.c"
@@ -2943,3 +2948,39 @@ init_socket(void)
 	gethostbyname_lock = PyThread_allocate_lock();
 #endif
 }
+
+/* Simplistic emulation code for inet_pton that only works for IPv4 */
+#ifndef HAVE_INET_PTON
+int my_inet_pton (int af, char *src, void *dst)
+{
+	if(af == AF_INET){
+		long packed_addr;
+#ifdef USE_GUSI1
+		packed_addr = (long)inet_addr(src).s_addr;
+#else
+		packed_addr = inet_addr(src);
+#endif
+		if (packed_addr == INADDR_NONE)
+			return 0;
+		memcpy(dst, &packed_addr, 4);
+		return 1;
+	}
+	/* Should set errno to EAFNOSUPPORT */
+	return -1;
+}
+
+char *
+my_inet_ntop(int af, void *src, char *dst, socklen_t size)
+{
+	if (af == AF_INET) {
+		struct in_addr packed_addr;
+		if (size < 16)
+			/* Should set errno to ENOSPC. */
+			return NULL;
+		memcpy(&packed_addr, src, sizeof(packed_addr));
+		return strncpy(dst, inet_ntoa(packed_addr), size);
+	}
+	/* Should set errno to EAFNOSUPPORT */
+	return NULL;
+}
+#endif

config.h.in

@@ -392,6 +392,9 @@
 /* Define if you have the hypot function.  */
 #undef HAVE_HYPOT
 
+/* Define if you have the inet_pton function.  */
+#undef HAVE_INET_PTON
+
 /* Define if you have the kill function.  */
 #undef HAVE_KILL
 

configure

 #! /bin/sh
 
-# From configure.in Revision: 1.219 
+# From configure.in Revision: 1.220 
 
 # Guess values for system-dependent variables and create Makefiles.
 # Generated automatically using autoconf version 2.13 
@@ -4480,7 +4480,7 @@ echo "$ac_t""$DYNLOADFILE" 1>&6
 for ac_func in alarm chown clock confstr ctermid ctermid_r execv \
  flock fork fsync fdatasync fpathconf ftime ftruncate \
  getgroups getlogin getpeername getpid getpwent getwd \
- kill link lstat mkfifo mktime mremap \
+ inet_pton kill link lstat mkfifo mktime mremap \
  nice pathconf pause plock poll pthread_init \
  putenv readlink \
  select setegid seteuid setgid \

configure.in

@@ -1162,7 +1162,7 @@ AC_MSG_RESULT($DYNLOADFILE)
 AC_CHECK_FUNCS(alarm chown clock confstr ctermid ctermid_r execv \
  flock fork fsync fdatasync fpathconf ftime ftruncate \
  getgroups getlogin getpeername getpid getpwent getwd \
- kill link lstat mkfifo mktime mremap \
+ inet_pton kill link lstat mkfifo mktime mremap \
  nice pathconf pause plock poll pthread_init \
  putenv readlink \
  select setegid seteuid setgid \