Fixed ftp support with uClibc due to differing inet_ntoa_r() behaviour.

lib/ftp.c

@@ -1524,7 +1524,7 @@ static CURLcode ftp_state_pasv_resp(struct connectdata *conn,
                       &separator[2],
                       &num,
                       &separator[3])) {
-        char sep1 = separator[0];
+        const char sep1 = separator[0];
         int i;
 
         /* The four separators should be identical, or else this is an oddly
@@ -1539,7 +1539,7 @@ static CURLcode ftp_state_pasv_resp(struct connectdata *conn,
           newport = num;
 
           /* use the same IP we are already connected to */
-          snprintf(newhost, NEWHOST_BUFSIZE, "%s", conn->ip_addr_str, newhost);
+          snprintf(newhost, NEWHOST_BUFSIZE, "%s", conn->ip_addr_str);
         }
       }
       else

lib/if2ip.c

@@ -65,10 +65,6 @@
 #include <sys/sockio.h>
 #endif
 
-#if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL)
-#include "inet_ntoa_r.h"
-#endif
-
 #ifdef VMS
 #include <inet.h>
 #endif
@@ -113,12 +109,7 @@ char *Curl_if2ip(const char *interface, char *buf, int buf_size)
 
       struct sockaddr_in *s = (struct sockaddr_in *)&req.ifr_dstaddr;
       memcpy(&in, &(s->sin_addr.s_addr), sizeof(in));
-#if defined(HAVE_INET_NTOA_R)
+      ip = Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
-      ip = inet_ntoa_r(in,buf,buf_size);
-#else
-      ip = strncpy(buf,inet_ntoa(in),buf_size);
-      ip[buf_size - 1] = 0;
-#endif
     }
     sclose(dummy);
   }

lib/inet_ntoa_r.h

@@ -1,5 +1,16 @@
 #ifndef __INET_NTOA_R_H
 #define __INET_NTOA_R_H
+
+#include "setup.h"
+
+#ifdef HAVE_INET_NTOA_R_2_ARGS
+/*
+ * uClibc 0.9.26 (at least) doesn't define this prototype. The buffer
+ * must be at least 16 characters long.
+ */
+char *inet_ntoa_r(const struct in_addr in, char buffer[]);
+
+#else
 /*
  * My solaris 5.6 system running gcc 2.8.1 does *not* have this prototype
  * in any system include file! Isn't that weird?
@@ -7,3 +18,5 @@
 char *inet_ntoa_r(const struct in_addr in, char *buffer, int buflen);
 
 #endif
+
+#endif

lib/inet_ntop.c

@@ -56,8 +56,19 @@
  */
 static const char *inet_ntop4 (const u_char *src, char *dst, size_t size)
 {
-#ifdef HAVE_INET_NTOA_R
+#if defined(HAVE_INET_NTOA_R_2_ARGS)
+  const char *ptr;
+  size_t len;
+  curlassert(size >= 16);
+  ptr = inet_ntoa_r(*(struct in_addr*)src, dst);
+  len = strlen(ptr);
+  memmove(dst, ptr, len);
+  dst[len] = 0;
+  return dst;
+
+#elif defined(HAVE_INET_NTOA_R)
   return inet_ntoa_r(*(struct in_addr*)src, dst, size);
+
 #else
   const char *addr = inet_ntoa(*(struct in_addr*)src);
 

lib/setup.h

@@ -276,4 +276,8 @@ typedef int curl_socket_t;
 
 #define LIBIDN_REQUIRED_VERSION "0.4.1"
 
+#ifdef __UCLIBC_MAJOR__
+#define HAVE_INET_NTOA_R_2_ARGS 1
+#endif
+
 #endif /* __CONFIG_H */

lib/url.c

@@ -104,7 +104,6 @@ void idn_free (void *ptr); /* prototype from idn-free.h, not provided by
 #include "base64.h"
 #include "ssluse.h"
 #include "hostip.h"
-#include "if2ip.h"
 #include "transfer.h"
 #include "sendf.h"
 #include "progress.h"