Remove IPv4-only codepath. Patch by Martin Storsjö <$first $first st>.

Originally committed as revision 21365 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -92,7 +92,6 @@ Configuration options:
   --enable-w32threads      use Win32 threads [no]
   --enable-x11grab         enable X11 grabbing [no]
   --disable-network        disable network support [no]
-  --disable-ipv6           disable IPv6 support [no]
   --disable-mpegaudio-hp   faster (but less accurate) MPEG audio decoding [no]
   --enable-gray            enable full grayscale support (slower color)
   --disable-swscale-alpha  disable alpha channel support in swscale
@@ -877,7 +876,6 @@ CONFIG_LIST="
     gprof
     gray
     hardcoded_tables
-    ipv6
     libdc1394
     libdirac
     libfaac
@@ -1034,6 +1032,8 @@ HAVE_LIST="
     soundcard_h
     poll_h
     struct_addrinfo
+    struct_ipv6_mreq
+    struct_sockaddr_in6
     struct_sockaddr_sa_len
     struct_sockaddr_storage
     sys_mman_h
@@ -1396,7 +1396,6 @@ enable fastdiv
 enable ffmpeg
 enable ffplay
 enable ffserver
-enable ipv6
 enable mpegaudio_hp
 enable network
 enable optimizations
@@ -2511,6 +2510,8 @@ texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
 if enabled network; then
     check_type "sys/types.h sys/socket.h" socklen_t
     check_type netdb.h "struct addrinfo"
+    check_type netinet/in.h "struct ipv6_mreq"
+    check_type netinet/in.h "struct sockaddr_in6"
     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
     # Prefer arpa/inet.h over winsock2
@@ -2523,6 +2524,8 @@ if enabled network; then
             network_extralibs="-lws2_32"; }
         check_type ws2tcpip.h socklen_t
         check_type ws2tcpip.h "struct addrinfo"
+        check_type ws2tcpip.h "struct ipv6_mreq"
+        check_type ws2tcpip.h "struct sockaddr_in6"
         check_type ws2tcpip.h "struct sockaddr_storage"
         check_struct winsock2.h "struct sockaddr" sa_len
     else
@@ -2530,20 +2533,6 @@ if enabled network; then
     fi
 fi
 
-enabled_all network ipv6 && check_ld <<EOF || disable ipv6
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-int main(void) {
-    struct sockaddr_storage saddr;
-    struct ipv6_mreq mreq6;
-    getaddrinfo(0,0,0,0);
-    getnameinfo(0,0,0,0,0,0,0);
-    IN6_IS_ADDR_MULTICAST((const struct in6_addr *)0);
-}
-EOF
-
 check_header linux/videodev.h
 check_header linux/videodev2.h
 check_header sys/videoio.h
@@ -2752,9 +2741,6 @@ echo "postprocessing support    ${postproc-no}"
 echo "new filter support        ${avfilter-no}"
 echo "filters using lavformat   ${avfilter_lavf-no}"
 echo "network support           ${network-no}"
-if enabled network; then
-    echo "IPv6 support              ${ipv6-no}"
-fi
 echo "threading support         ${thread_type-no}"
 echo "SDL support               ${sdl-no}"
 echo "Sun medialib support      ${mlib-no}"

libavformat/udp.c

@@ -52,11 +52,7 @@ typedef struct {
     int is_multicast;
     int local_port;
     int reuse_socket;
-#if !CONFIG_IPV6
-    struct sockaddr_in dest_addr;
-#else
     struct sockaddr_storage dest_addr;
-#endif
     int dest_addr_len;
 } UDPContext;
 
@@ -72,7 +68,7 @@ static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr
         }
     }
 #endif
-#if CONFIG_IPV6
+#if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
     if (addr->sa_family == AF_INET6) {
         if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
             av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS): %s\n", strerror(errno));
@@ -96,7 +92,7 @@ static int udp_join_multicast_group(int sockfd, struct sockaddr *addr) {
         }
     }
 #endif
-#if CONFIG_IPV6
+#if HAVE_STRUCT_IPV6_MREQ
     if (addr->sa_family == AF_INET6) {
         struct ipv6_mreq mreq6;
 
@@ -124,7 +120,7 @@ static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) {
         }
     }
 #endif
-#if CONFIG_IPV6
+#if HAVE_STRUCT_IPV6_MREQ
     if (addr->sa_family == AF_INET6) {
         struct ipv6_mreq mreq6;
 
@@ -139,7 +135,6 @@ static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) {
     return 0;
 }
 
-#if CONFIG_IPV6
 static struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
     struct addrinfo hints, *res = 0;
     int error;
@@ -182,9 +177,11 @@ static int is_multicast_address(struct sockaddr_storage *addr)
     if (addr->ss_family == AF_INET) {
         return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
     }
+#if HAVE_STRUCT_SOCKADDR_IN6
     if (addr->ss_family == AF_INET6) {
         return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
     }
+#endif
 
     return 0;
 }
@@ -236,46 +233,6 @@ static int udp_port(struct sockaddr_storage *addr, int addr_len)
     return strtol(sbuf, NULL, 10);
 }
 
-#else
-
-static int udp_set_url(struct sockaddr_in *addr, const char *hostname, int port)
-{
-    /* set the destination address */
-    if (resolve_host(&addr->sin_addr, hostname) < 0)
-        return AVERROR(EIO);
-    addr->sin_family = AF_INET;
-    addr->sin_port = htons(port);
-
-    return sizeof(struct sockaddr_in);
-}
-
-static int is_multicast_address(struct sockaddr_in *addr)
-{
-    return IN_MULTICAST(ntohl(addr->sin_addr.s_addr));
-}
-
-static int udp_socket_create(UDPContext *s, struct sockaddr_in *addr, int *addr_len)
-{
-    int fd;
-
-    fd = socket(AF_INET, SOCK_DGRAM, 0);
-    if (fd < 0)
-        return -1;
-
-    addr->sin_family = AF_INET;
-    addr->sin_addr.s_addr = htonl (INADDR_ANY);
-    addr->sin_port = htons(s->local_port);
-    *addr_len = sizeof(struct sockaddr_in);
-
-    return fd;
-}
-
-static int udp_port(struct sockaddr_in *addr, int len)
-{
-    return ntohs(addr->sin_port);
-}
-#endif /* CONFIG_IPV6 */
-
 
 /**
  * If no filename is given to av_open_input_file because you want to
@@ -345,11 +302,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
     int is_output;
     const char *p;
     char buf[256];
-#if !CONFIG_IPV6
-    struct sockaddr_in my_addr;
-#else
     struct sockaddr_storage my_addr;
-#endif
     int len;
 
     h->is_streamed = 1;