X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fudp.c;h=555888b96a46d54d36b16af4dee5691a0434007e;hb=8c3b161e9ea74013b38ea1985ffda07473978d16;hp=3f3a9f760bbb7d75a343dcbc394b9465e10ef3e5;hpb=276358c1c40311a068c17639fe4c0135710b7688;p=ffmpeg

diff --git a/libavformat/udp.c b/libavformat/udp.c
index 3f3a9f760bb..555888b96a4 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -1,124 +1,151 @@
 /*
  * UDP prototype streaming system
- * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  *
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file libavformat/udp.c
+ * UDP protocol
  */
+
+#define _BSD_SOURCE     /* Needed for using struct ip_mreq with recent glibc */
 #include "avformat.h"
 #include <unistd.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#ifndef __BEOS__
-# include <arpa/inet.h>
-#else
-# include "barpainet.h"
+#include "network.h"
+#include "os_support.h"
+#if HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+#include <sys/time.h>
+
+#ifndef IPV6_ADD_MEMBERSHIP
+#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
+#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
+#endif
+#ifndef IN_MULTICAST
+#define IN_MULTICAST(a) ((((uint32_t)(a)) & 0xf0000000) == 0xe0000000)
+#endif
+#ifndef IN6_IS_ADDR_MULTICAST
+#define IN6_IS_ADDR_MULTICAST(a) (((uint8_t *) (a))[0] == 0xff)
 #endif
-#include <netdb.h>
 
 typedef struct {
     int udp_fd;
     int ttl;
+    int buffer_size;
     int is_multicast;
     int local_port;
-#ifndef CONFIG_IPV6
-    struct ip_mreq mreq;
-    struct sockaddr_in dest_addr;
-#else
+    int reuse_socket;
     struct sockaddr_storage dest_addr;
-    size_t dest_addr_len;
-#endif
+    int dest_addr_len;
 } UDPContext;
 
 #define UDP_TX_BUF_SIZE 32768
+#define UDP_MAX_PKT_SIZE 65536
 
-#ifdef CONFIG_IPV6
-
-int udp_ipv6_is_multicast_address(const struct sockaddr *addr) {
-    if (addr->sa_family == AF_INET)
-        return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));  
-    if (addr->sa_family == AF_INET6)
-        return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);    
-    return -1;
-}
-
-int udp_ipv6_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr) {
+static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
+                                 struct sockaddr *addr)
+{
+#ifdef IP_MULTICAST_TTL
     if (addr->sa_family == AF_INET) {
         if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
-            perror("setsockopt(IP_MULTICAST_TTL)");
+            av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL): %s\n", strerror(errno));
             return -1;
         }
     }
+#endif
+#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) {
-            perror("setsockopt(IPV6_MULTICAST_HOPS)");
+            av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS): %s\n", strerror(errno));
             return -1;
         }
     }
+#endif
     return 0;
 }
 
-int udp_ipv6_join_multicast_group(int sockfd, struct sockaddr *addr) {
-    struct ip_mreq   mreq;
-    struct ipv6_mreq mreq6; 
+static int udp_join_multicast_group(int sockfd, struct sockaddr *addr)
+{
+#ifdef IP_ADD_MEMBERSHIP
     if (addr->sa_family == AF_INET) {
+        struct ip_mreq mreq;
+
         mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
         mreq.imr_interface.s_addr= INADDR_ANY;
         if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
-            perror("setsockopt(IP_ADD_MEMBERSHIP)");
+            av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP): %s\n", strerror(errno));
             return -1;
         }
     }
+#endif
+#if HAVE_STRUCT_IPV6_MREQ
     if (addr->sa_family == AF_INET6) {
+        struct ipv6_mreq mreq6;
+
         memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
         mreq6.ipv6mr_interface= 0;
         if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
-            perror("setsockopt(IPV6_ADD_MEMBERSHIP)");
+            av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP): %s\n", strerror(errno));
             return -1;
         }
     }
+#endif
     return 0;
 }
 
-int udp_ipv6_leave_multicast_group(int sockfd, struct sockaddr *addr) {
-    struct ip_mreq   mreq;
-    struct ipv6_mreq mreq6; 
+static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr)
+{
+#ifdef IP_DROP_MEMBERSHIP
     if (addr->sa_family == AF_INET) {
+        struct ip_mreq mreq;
+
         mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
         mreq.imr_interface.s_addr= INADDR_ANY;
         if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
-            perror("setsockopt(IP_DROP_MEMBERSHIP)");
+            av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP): %s\n", strerror(errno));
             return -1;
         }
     }
+#endif
+#if HAVE_STRUCT_IPV6_MREQ
     if (addr->sa_family == AF_INET6) {
+        struct ipv6_mreq mreq6;
+
         memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
         mreq6.ipv6mr_interface= 0;
         if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
-            perror("setsockopt(IPV6_DROP_MEMBERSHIP)");
+            av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP): %s\n", strerror(errno));
             return -1;
         }
     }
+#endif
     return 0;
 }
 
-struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
+static struct addrinfo* udp_resolve_host(const char *hostname, int port,
+                                         int type, int family, int flags)
+{
     struct addrinfo hints, *res = 0;
     int error;
     char sport[16];
-    const char *node = 0, *service = 0;
+    const char *node = 0, *service = "0";
 
     if (port > 0) {
         snprintf(sport, sizeof(sport), "%d", port);
@@ -127,96 +154,93 @@ struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type,
     if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
         node = hostname;
     }
-    if ((node) || (service)) {
-        memset(&hints, 0, sizeof(hints));
-        hints.ai_socktype = type;
-        hints.ai_family   = family;
-        hints.ai_flags = flags; 
-        if ((error = getaddrinfo(node, service, &hints, &res))) {
-            av_log(NULL, AV_LOG_ERROR, "udp_ipv6_resolve_host: %s\n", gai_strerror(error));
-        }
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_socktype = type;
+    hints.ai_family   = family;
+    hints.ai_flags = flags;
+    if ((error = getaddrinfo(node, service, &hints, &res))) {
+        av_log(NULL, AV_LOG_ERROR, "udp_resolve_host: %s\n", gai_strerror(error));
     }
+
     return res;
 }
 
-int udp_ipv6_set_remote_url(URLContext *h, const char *uri) {
-    UDPContext *s = h->priv_data;
-    char hostname[256];
-    int port;
+static int udp_set_url(struct sockaddr_storage *addr,
+                       const char *hostname, int port)
+{
     struct addrinfo *res0;
-    url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
-    res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
-    if (res0 == 0) return AVERROR_IO;
-    memcpy(&s->dest_addr, res0->ai_addr, res0->ai_addrlen);
-    s->dest_addr_len = res0->ai_addrlen;
+    int addr_len;
+
+    res0 = udp_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
+    if (res0 == 0) return AVERROR(EIO);
+    memcpy(addr, res0->ai_addr, res0->ai_addrlen);
+    addr_len = res0->ai_addrlen;
     freeaddrinfo(res0);
+
+    return addr_len;
+}
+
+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;
 }
 
-int udp_ipv6_set_local(URLContext *h) {
-    UDPContext *s = h->priv_data;
+static int udp_socket_create(UDPContext *s,
+                             struct sockaddr_storage *addr, int *addr_len)
+{
     int udp_fd = -1;
-    struct sockaddr_storage clientaddr;
-    socklen_t addrlen;
-    char sbuf[NI_MAXSERV];
-    char hbuf[NI_MAXHOST];
     struct addrinfo *res0 = NULL, *res = NULL;
-                
-    if (s->local_port != 0) {       
-        res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, AF_UNSPEC, AI_PASSIVE);
-        if (res0 == 0)
-            goto fail;
-        for (res = res0; res; res=res->ai_next) {		
-            udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
-            if (udp_fd > 0) break;
-            perror("socket");
-        }
-    } else {
-        udp_fd = socket(s->dest_addr.ss_family, SOCK_DGRAM, 0);
-        if (udp_fd < 0) 
-            perror("socket");
+    int family = AF_UNSPEC;
+
+    if (((struct sockaddr *) &s->dest_addr)->sa_family)
+        family = ((struct sockaddr *) &s->dest_addr)->sa_family;
+    res0 = udp_resolve_host(0, s->local_port, SOCK_DGRAM, family, AI_PASSIVE);
+    if (res0 == 0)
+        goto fail;
+    for (res = res0; res; res=res->ai_next) {
+        udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
+        if (udp_fd > 0) break;
+        av_log(NULL, AV_LOG_ERROR, "socket: %s\n", strerror(errno));
     }
 
     if (udp_fd < 0)
         goto fail;
-       
-    if (s->local_port != 0) {
-        if (bind(udp_fd, res0->ai_addr, res0->ai_addrlen) < 0) {
-            perror("bind");
-            goto fail;
-        }
-        freeaddrinfo(res0);
-        res0 = NULL;
-    } 
 
-    addrlen = sizeof(clientaddr);
-    if (getsockname(udp_fd, (struct sockaddr *)&clientaddr, &addrlen) < 0) {
-        perror("getsockname");
-        goto fail;
-    }
+    memcpy(addr, res->ai_addr, res->ai_addrlen);
+    *addr_len = res->ai_addrlen;
 
-    if (getnameinfo((struct sockaddr *)&clientaddr, addrlen, hbuf, sizeof(hbuf),  sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
-        perror("getnameinfo");
-        goto fail;
-    }
+    freeaddrinfo(res0);
 
-    s->local_port = strtol(sbuf, NULL, 10);
-    
     return udp_fd;
-    
+
  fail:
     if (udp_fd >= 0)
-#ifdef CONFIG_BEOS_NETSERVER
         closesocket(udp_fd);
-#else
-        close(udp_fd);
-#endif
     if(res0)
         freeaddrinfo(res0);
     return -1;
 }
 
-#endif
+static int udp_port(struct sockaddr_storage *addr, int addr_len)
+{
+    char sbuf[sizeof(int)*3+1];
+
+    if (getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0,  sbuf, sizeof(sbuf), NI_NUMERICSERV) != 0) {
+        av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", strerror(errno));
+        return -1;
+    }
+
+    return strtol(sbuf, NULL, 10);
+}
 
 
 /**
@@ -225,10 +249,10 @@ int udp_ipv6_set_local(URLContext *h) {
  * the remote server address.
  *
  * url syntax: udp://host:port[?option=val...]
- * option: 'multicast=1' : enable multicast 
- *         'ttl=n'       : set the ttl value (for multicast only)
+ * option: 'ttl=n'       : set the ttl value (for multicast only)
  *         'localport=n' : set the local port
  *         'pkt_size=n'  : set max packet size
+ *         'reuse=1'     : enable reusing the socket
  *
  * @param s1 media file context
  * @param uri of the remote server
@@ -236,22 +260,20 @@ int udp_ipv6_set_local(URLContext *h) {
  */
 int udp_set_remote_url(URLContext *h, const char *uri)
 {
-#ifdef CONFIG_IPV6
-    return udp_ipv6_set_remote_url(h, uri);
-#else
     UDPContext *s = h->priv_data;
     char hostname[256];
     int port;
-    
+
     url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
 
     /* set the destination address */
-    if (resolve_host(&s->dest_addr.sin_addr, hostname) < 0)
-        return AVERROR_IO;
-    s->dest_addr.sin_family = AF_INET;
-    s->dest_addr.sin_port = htons(port);
+    s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port);
+    if (s->dest_addr_len < 0) {
+        return AVERROR(EIO);
+    }
+    s->is_multicast = is_multicast_address(&s->dest_addr);
+
     return 0;
-#endif
 }
 
 /**
@@ -270,6 +292,9 @@ int udp_get_local_port(URLContext *h)
  * streams at the same time.
  * @param h media file context
  */
+#if (LIBAVFORMAT_VERSION_MAJOR >= 53)
+static
+#endif
 int udp_get_file_handle(URLContext *h)
 {
     UDPContext *s = h->priv_data;
@@ -281,32 +306,33 @@ int udp_get_file_handle(URLContext *h)
 static int udp_open(URLContext *h, const char *uri, int flags)
 {
     char hostname[1024];
-    int port, udp_fd = -1, tmp;
+    int port, udp_fd = -1, tmp, bind_ret = -1;
     UDPContext *s = NULL;
     int is_output;
     const char *p;
     char buf[256];
-#ifndef CONFIG_IPV6
-    struct sockaddr_in my_addr, my_addr1;
+    struct sockaddr_storage my_addr;
     int len;
-#endif
 
     h->is_streamed = 1;
     h->max_packet_size = 1472;
 
     is_output = (flags & URL_WRONLY);
-    
-    s = av_malloc(sizeof(UDPContext));
+
+    if(!ff_network_init())
+        return AVERROR(EIO);
+
+    s = av_mallocz(sizeof(UDPContext));
     if (!s)
-        return -ENOMEM;
+        return AVERROR(ENOMEM);
 
     h->priv_data = s;
     s->ttl = 16;
-    s->is_multicast = 0;
-    s->local_port = 0;
+    s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
+
     p = strchr(uri, '?');
     if (p) {
-        s->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
+        s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
         if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
             s->ttl = strtol(buf, NULL, 10);
         }
@@ -316,122 +342,111 @@ static int udp_open(URLContext *h, const char *uri, int flags)
         if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
             h->max_packet_size = strtol(buf, NULL, 10);
         }
+        if (find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
+            s->buffer_size = strtol(buf, NULL, 10);
+        }
     }
 
     /* fill the dest addr */
     url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
-    
+
     /* XXX: fix url_split */
     if (hostname[0] == '\0' || hostname[0] == '?') {
         /* only accepts null hostname if input */
-        if (s->is_multicast || (flags & URL_WRONLY))
+        if (flags & URL_WRONLY)
             goto fail;
     } else {
         udp_set_remote_url(h, uri);
     }
 
-#ifndef CONFIG_IPV6
-    udp_fd = socket(PF_INET, SOCK_DGRAM, 0);
+    if (s->is_multicast && !(h->flags & URL_WRONLY))
+        s->local_port = port;
+    udp_fd = udp_socket_create(s, &my_addr, &len);
     if (udp_fd < 0)
         goto fail;
 
-    my_addr.sin_family = AF_INET;
-    my_addr.sin_addr.s_addr = htonl (INADDR_ANY);
-    if (s->is_multicast && !(h->flags & URL_WRONLY)) {
-        /* special case: the bind must be done on the multicast address port */
-        my_addr.sin_port = s->dest_addr.sin_port;
-    } else {
-        my_addr.sin_port = htons(s->local_port);
-    }
+    if (s->reuse_socket)
+        if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
+            goto fail;
 
     /* the bind is needed to give a port to the socket now */
-    if (bind(udp_fd,(struct sockaddr *)&my_addr, sizeof(my_addr)) < 0) 
+    /* if multicast, try the multicast address bind first */
+    if (s->is_multicast && !(h->flags & URL_WRONLY)) {
+        bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
+    }
+    /* bind to the local address if not multicast or if the multicast
+     * bind failed */
+    if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0)
         goto fail;
 
-    len = sizeof(my_addr1);
-    getsockname(udp_fd, (struct sockaddr *)&my_addr1, &len);
-    s->local_port = ntohs(my_addr1.sin_port);
+    len = sizeof(my_addr);
+    getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
+    s->local_port = udp_port(&my_addr, len);
 
-#ifndef CONFIG_BEOS_NETSERVER
     if (s->is_multicast) {
         if (h->flags & URL_WRONLY) {
             /* output */
-            if (setsockopt(udp_fd, IPPROTO_IP, IP_MULTICAST_TTL, 
-                           &s->ttl, sizeof(s->ttl)) < 0) {
-                perror("IP_MULTICAST_TTL");
+            if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
                 goto fail;
-            }
         } else {
             /* input */
-            memset(&s->mreq, 0, sizeof(s->mreq));
-            s->mreq.imr_multiaddr = s->dest_addr.sin_addr;
-            s->mreq.imr_interface.s_addr = htonl (INADDR_ANY);
-            if (setsockopt(udp_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, 
-                           &s->mreq, sizeof(s->mreq)) < 0) {
-                perror("rtp: IP_ADD_MEMBERSHIP");
-                goto fail;
-            }
-        }
-    }
-#endif
-#else
-    if (s->is_multicast && !(h->flags & URL_WRONLY))
-        s->local_port = port;
-    udp_fd = udp_ipv6_set_local(h);
-    if (udp_fd < 0)
-        goto fail;
-#ifndef CONFIG_BEOS_NETSERVER
-    if (s->is_multicast) {
-        if (h->flags & URL_WRONLY) {
-            if (udp_ipv6_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
-                goto fail;
-        } else {
-            if (udp_ipv6_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
+            if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
                 goto fail;
         }
     }
-#endif          
-#endif
 
     if (is_output) {
         /* limit the tx buf size to limit latency */
-        tmp = UDP_TX_BUF_SIZE;
+        tmp = s->buffer_size;
         if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
-            perror("setsockopt sndbuf");
+            av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
             goto fail;
         }
+    } else {
+        /* set udp recv buffer size to the largest possible udp packet size to
+         * avoid losing data on OSes that set this too low by default. */
+        tmp = s->buffer_size;
+        if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
+            av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno));
+        }
+        /* make the socket non-blocking */
+        ff_socket_nonblock(udp_fd, 1);
     }
 
     s->udp_fd = udp_fd;
     return 0;
  fail:
     if (udp_fd >= 0)
-#ifdef CONFIG_BEOS_NETSERVER
         closesocket(udp_fd);
-#else
-        close(udp_fd);
-#endif
     av_free(s);
-    return AVERROR_IO;
+    return AVERROR(EIO);
 }
 
 static int udp_read(URLContext *h, uint8_t *buf, int size)
 {
     UDPContext *s = h->priv_data;
-#ifndef CONFIG_IPV6
-    struct sockaddr_in from;
-#else
-    struct sockaddr_storage from;
-#endif
-    int from_len, len;
+    int len;
+    fd_set rfds;
+    int ret;
+    struct timeval tv;
 
     for(;;) {
-        from_len = sizeof(from);
-        len = recvfrom (s->udp_fd, buf, size, 0,
-                        (struct sockaddr *)&from, &from_len);
+        if (url_interrupt_cb())
+            return AVERROR(EINTR);
+        FD_ZERO(&rfds);
+        FD_SET(s->udp_fd, &rfds);
+        tv.tv_sec = 0;
+        tv.tv_usec = 100 * 1000;
+        ret = select(s->udp_fd + 1, &rfds, NULL, NULL, &tv);
+        if (ret < 0)
+            return AVERROR(EIO);
+        if (!(ret > 0 && FD_ISSET(s->udp_fd, &rfds)))
+            continue;
+        len = recv(s->udp_fd, buf, size, 0);
         if (len < 0) {
-            if (errno != EAGAIN && errno != EINTR)
-                return AVERROR_IO;
+            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
+                ff_neterrno() != FF_NETERROR(EINTR))
+                return AVERROR(EIO);
         } else {
             break;
         }
@@ -445,16 +460,13 @@ static int udp_write(URLContext *h, uint8_t *buf, int size)
     int ret;
 
     for(;;) {
-        ret = sendto (s->udp_fd, buf, size, 0, 
+        ret = sendto (s->udp_fd, buf, size, 0,
                       (struct sockaddr *) &s->dest_addr,
-#ifndef CONFIG_IPV6
-                      sizeof (s->dest_addr));
-#else
                       s->dest_addr_len);
-#endif
         if (ret < 0) {
-            if (errno != EINTR && errno != EAGAIN)
-                return AVERROR_IO;
+            if (ff_neterrno() != FF_NETERROR(EINTR) &&
+                ff_neterrno() != FF_NETERROR(EAGAIN))
+                return AVERROR(EIO);
         } else {
             break;
         }
@@ -466,22 +478,10 @@ static int udp_close(URLContext *h)
 {
     UDPContext *s = h->priv_data;
 
-#ifndef CONFIG_BEOS_NETSERVER
-#ifndef CONFIG_IPV6
-    if (s->is_multicast && !(h->flags & URL_WRONLY)) {
-        if (setsockopt(s->udp_fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, 
-                       &s->mreq, sizeof(s->mreq)) < 0) {
-            perror("IP_DROP_MEMBERSHIP");
-        }
-    }
-#else
     if (s->is_multicast && !(h->flags & URL_WRONLY))
-        udp_ipv6_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
-#endif
-    close(s->udp_fd);
-#else
+        udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
     closesocket(s->udp_fd);
-#endif
+    ff_network_close();
     av_free(s);
     return 0;
 }
@@ -493,4 +493,5 @@ URLProtocol udp_protocol = {
     udp_write,
     NULL, /* seek */
     udp_close,
+    .url_get_file_handle = udp_get_file_handle,
 };