Changeset 7330

Timestamp:

Sep 3, 2010, 12:28:21 AM (14 years ago)

Author:

adrfried

Message:

patch libenet to support ipv6

This is only done for Linux so far.

Location:

code/branches/ipv6/src/external/enet

Files:

• host.c (modified) (1 diff)
• include/enet/enet.h (modified) (3 diffs)
• patches (added)
• patches/0001-use-getaddrinfo-for-lookup-in-unix.c.patch (added)
• patches/0002-basic-IPv6-support-on-Linux-systems.patch (added)
• protocol.c (modified) (4 diffs)
• unix.c (modified) (11 diffs)

code/branches/ipv6/src/external/enet/host.c

@@ -50 +50 @@
 
     host -> socket = enet_socket_create (ENET_SOCKET_TYPE_DATAGRAM);
+    enet_socket_set_option (host -> socket, ENET_SOCKOPT_V6ONLY, 0); // Needs to be set before bind.
+
     if (host -> socket == ENET_SOCKET_NULL || (address != NULL && enet_socket_bind (host -> socket, address) < 0))
     {

code/branches/ipv6/src/external/enet/include/enet/enet.h

@@ -51 +51 @@
    ENET_SOCKOPT_RCVBUF    = 3,
    ENET_SOCKOPT_SNDBUF    = 4,
-   ENET_SOCKOPT_REUSEADDR = 5
+   ENET_SOCKOPT_REUSEADDR = 5,
+   ENET_SOCKOPT_V6ONLY = 6
 } ENetSocketOption;
 
-enum
-{
-   ENET_HOST_ANY       = 0,            /**< specifies the default server host */
-   ENET_HOST_BROADCAST = 0xFFFFFFFF,   /**< specifies a subnet-wide broadcast */
-
-   ENET_PORT_ANY       = 0             /**< specifies that a port should be automatically chosen */
-};
+typedef struct _ENetHostAddress
+{
+   enet_uint8 addr[16];
+} ENetHostAddress;
+
+extern const ENetHostAddress ENET_HOST_ANY;       /**< specifies the default server host */
+extern const ENetHostAddress ENET_HOST_BROADCAST; /**< specifies a IPv4 subnet-wide broadcast */
+#define ENET_PORT_ANY 0                           /**< specifies that a port should be automatically chosen */
 
 /**
@@ -74 +76 @@
 typedef struct _ENetAddress
 {
-   enet_uint32 host;
+   ENetHostAddress host;
+   enet_uint32 scopeID; //FIXME: this is of different size on Windows
    enet_uint16 port;
 } ENetAddress;
@@ -489 +492 @@
 ENET_API int enet_address_get_host (const ENetAddress * address, char * hostName, size_t nameLength);
 
+/** Maps an IPv4 Address to an IPv6 address.
+    @param address IPv4 address in network byte order
+    @returns the IPv4-mapped IPv6 address in network byte order
+*/
+static inline ENetHostAddress enet_address_map4 (enet_uint32 address)
+{
+   ENetHostAddress addr = ENET_HOST_ANY;
+   ((enet_uint16 *)addr.addr)[5] = 0xffff;
+   ((enet_uint32 *)addr.addr)[3] = address;
+   return addr;
+}
+
 /** @} */
 

code/branches/ipv6/src/external/enet/protocol.c

@@ -9 +9 @@
 #include "enet/time.h"
 #include "enet/enet.h"
+
+const ENetHostAddress ENET_HOST_ANY = { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } };
+const ENetHostAddress ENET_HOST_BROADCAST = { { 0,0,0,0,0,0,0,0,0,0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
 
 static size_t commandSizes [ENET_PROTOCOL_COMMAND_COUNT] =
@@ -263 +266 @@
     {
         if (currentPeer -> state != ENET_PEER_STATE_DISCONNECTED &&
-            currentPeer -> address.host == host -> receivedAddress.host &&
             currentPeer -> address.port == host -> receivedAddress.port &&
-            currentPeer -> connectID == command -> connect.connectID)
+            currentPeer -> connectID == command -> connect.connectID &&
+            !memcmp(& currentPeer -> address.host, & host -> receivedAddress.host, sizeof (ENetHostAddress)))
           return NULL;
     }
@@ -849 +852 @@
        if (peer -> state == ENET_PEER_STATE_DISCONNECTED ||
            peer -> state == ENET_PEER_STATE_ZOMBIE ||
-           (host -> receivedAddress.host != peer -> address.host &&
-             peer -> address.host != ENET_HOST_BROADCAST) ||
            (peer -> outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID &&
-            sessionID != peer -> incomingSessionID))
+            sessionID != peer -> incomingSessionID) ||
+           ( memcmp(& peer -> address.host, & host -> receivedAddress.host, sizeof (ENetHostAddress)) &&
+             memcmp(& peer -> address.host, & ENET_HOST_BROADCAST, sizeof (ENetHostAddress)) &&
+             peer -> address.host.addr[0] != 0xff ) )
          return 0;
     }
@@ -892 +896 @@
     if (peer != NULL)
     {
-       peer -> address.host = host -> receivedAddress.host;
-       peer -> address.port = host -> receivedAddress.port;
+       peer -> address = host -> receivedAddress;
        peer -> incomingDataTotal += host -> receivedDataLength;
     }

code/branches/ipv6/src/external/enet/unix.c

@@ -75 +75 @@
 enet_address_set_host (ENetAddress * address, const char * name)
 {
-    struct hostent * hostEntry = NULL;
-#ifdef HAS_GETHOSTBYNAME_R
-    struct hostent hostData;
-    char buffer [2048];
-    int errnum;
-
-#if defined(linux) || defined(__linux) || defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-    gethostbyname_r (name, & hostData, buffer, sizeof (buffer), & hostEntry, & errnum);
-#else
-    hostEntry = gethostbyname_r (name, & hostData, buffer, sizeof (buffer), & errnum);
-#endif
-#else
-    hostEntry = gethostbyname (name);
-#endif
-
-    if (hostEntry == NULL ||
-        hostEntry -> h_addrtype != AF_INET)
-    {
-#ifdef HAS_INET_PTON
-        if (! inet_pton (AF_INET, name, & address -> host))
-#else
-        if (! inet_aton (name, (struct in_addr *) & address -> host))
-#endif
-            return -1;
-        return 0;
-    }
-
-    address -> host = * (enet_uint32 *) hostEntry -> h_addr_list [0];
+    struct addrinfo hints;
+    struct addrinfo * result;
+    struct addrinfo * res;
+
+    memset(& hints, 0, sizeof (hints));
+    hints.ai_flags = AI_NUMERICSERV | AI_ADDRCONFIG;
+    hints.ai_family = AF_UNSPEC;
+
+    if ( getaddrinfo(name, NULL, &hints, &result) )
+    {
+        return -1;
+    }
+
+    for (res = result; res != NULL; res = res -> ai_next)
+    {
+        if (res -> ai_family == AF_INET)
+        {
+            address -> host = enet_address_map4( ((struct sockaddr_in *) res -> ai_addr ) -> sin_addr.s_addr );
+            address -> scopeID = 0;
+            break;
+        }
+        if (res -> ai_family == AF_INET6)
+        {
+            address -> host = * (ENetHostAddress *) & ((struct sockaddr_in6 *) res -> ai_addr ) -> sin6_addr;
+            address -> scopeID = ((struct sockaddr_in6 *) res -> ai_addr ) -> sin6_scope_id;
+            break;
+        }
+    }
+    freeaddrinfo(result);
+    if (res == NULL) return -1;
 
     return 0;
 }
 
+static int
+enet_address_get_host_x (const ENetAddress * address, char * name, size_t nameLength, int flags)
+{
+    struct sockaddr_in6 sin;
+
+    memset (& sin, 0, sizeof (struct sockaddr_in6));
+
+    sin.sin6_family = AF_INET6;
+    sin.sin6_addr = * (struct in6_addr *) & address -> host;
+    sin.sin6_scope_id = address -> scopeID;
+
+    if ( getnameinfo((struct sockaddr *) & sin, sizeof(sin), name, nameLength, NULL, 0, flags))
+    {
+        return -1;
+    }
+
+    return 0;
+}
+
 int
 enet_address_get_host_ip (const ENetAddress * address, char * name, size_t nameLength)
 {
-#ifdef HAS_INET_NTOP
-    if (inet_ntop (AF_INET, & address -> host, name, nameLength) == NULL)
-#else
-    char * addr = inet_ntoa (* (struct in_addr *) & address -> host);
-    if (addr != NULL)
-        strncpy (name, addr, nameLength);
+    return enet_address_get_host_x(address, name, nameLength, NI_NUMERICHOST);
+}
+
+int
+enet_address_get_host (const ENetAddress * address, char * name, size_t nameLength)
+{
+    return enet_address_get_host_x(address, name, nameLength, 0);
+}
+
+int
+enet_socket_bind (ENetSocket socket, const ENetAddress * address)
+{
+    struct sockaddr_in6 sin;
+
+    memset (& sin, 0, sizeof (struct sockaddr_in6));
+
+    sin.sin6_family = AF_INET6;
+
+    if (address != NULL)
+    {
+       sin.sin6_port = ENET_HOST_TO_NET_16 (address -> port);
+       sin.sin6_addr = * (struct in6_addr *) & address -> host;
+       sin.sin6_scope_id = address -> scopeID;
+    }
     else
-#endif
-        return -1;
-    return 0;
-}
-
-int
-enet_address_get_host (const ENetAddress * address, char * name, size_t nameLength)
-{
-    struct in_addr in;
-    struct hostent * hostEntry = NULL;
-#ifdef HAS_GETHOSTBYADDR_R
-    struct hostent hostData;
-    char buffer [2048];
-    int errnum;
-
-    in.s_addr = address -> host;
-
-#if defined(linux) || defined(__linux) || defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-    gethostbyaddr_r ((char *) & in, sizeof (struct in_addr), AF_INET, & hostData, buffer, sizeof (buffer), & hostEntry, & errnum);
-#else
-    hostEntry = gethostbyaddr_r ((char *) & in, sizeof (struct in_addr), AF_INET, & hostData, buffer, sizeof (buffer), & errnum);
-#endif
-#else
-    in.s_addr = address -> host;
-
-    hostEntry = gethostbyaddr ((char *) & in, sizeof (struct in_addr), AF_INET);
-#endif
-
-    if (hostEntry == NULL)
-      return enet_address_get_host_ip (address, name, nameLength);
-
-    strncpy (name, hostEntry -> h_name, nameLength);
-
-    return 0;
-}
-
-int
-enet_socket_bind (ENetSocket socket, const ENetAddress * address)
-{
-    struct sockaddr_in sin;
-
-    memset (& sin, 0, sizeof (struct sockaddr_in));
-
-    sin.sin_family = AF_INET;
-
-    if (address != NULL)
-    {
-       sin.sin_port = ENET_HOST_TO_NET_16 (address -> port);
-       sin.sin_addr.s_addr = address -> host;
-    }
-    else
-    {
-       sin.sin_port = 0;
-       sin.sin_addr.s_addr = INADDR_ANY;
+    {
+       sin.sin6_port = 0;
+       sin.sin6_addr = in6addr_any;
+       sin.sin6_scope_id = 0;
     }
 
     return bind (socket,
                  (struct sockaddr *) & sin,
-                 sizeof (struct sockaddr_in)); 
+                 sizeof (struct sockaddr_in6));
 }
 
@@ -187 +176 @@
 enet_socket_create (ENetSocketType type)
 {
-    return socket (PF_INET, type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM, 0);
+    return socket (AF_INET6, type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM, 0);
 }
 
@@ -220 +209 @@
             break;
 
+        case ENET_SOCKOPT_V6ONLY:
+            result = setsockopt (socket, IPPROTO_IPV6, IPV6_V6ONLY, (char *) & value, sizeof (int));
+            break;
+
         default:
             break;
@@ -229 +222 @@
 enet_socket_connect (ENetSocket socket, const ENetAddress * address)
 {
-    struct sockaddr_in sin;
-
-    memset (& sin, 0, sizeof (struct sockaddr_in));
-
-    sin.sin_family = AF_INET;
-    sin.sin_port = ENET_HOST_TO_NET_16 (address -> port);
-    sin.sin_addr.s_addr = address -> host;
-
-    return connect (socket, (struct sockaddr *) & sin, sizeof (struct sockaddr_in));
+    struct sockaddr_in6 sin;
+
+    memset (& sin, 0, sizeof (struct sockaddr_in6));
+
+    sin.sin6_family = AF_INET6;
+    sin.sin6_port = ENET_HOST_TO_NET_16 (address -> port);
+    sin.sin6_addr = * (struct in6_addr *) & address -> host;
+    sin.sin6_scope_id = address -> scopeID;
+
+    return connect (socket, (struct sockaddr *) & sin, sizeof (struct sockaddr_in6));
 }
 
@@ -244 +238 @@
 {
     int result;
-    struct sockaddr_in sin;
-    socklen_t sinLength = sizeof (struct sockaddr_in);
+    struct sockaddr_in6 sin;
+    socklen_t sinLength = sizeof (struct sockaddr_in6);
 
     result = accept (socket, 
@@ -256 +250 @@
     if (address != NULL)
     {
-        address -> host = (enet_uint32) sin.sin_addr.s_addr;
-        address -> port = ENET_NET_TO_HOST_16 (sin.sin_port);
+        address -> host = * (ENetHostAddress *) & sin.sin6_addr;
+        address -> scopeID = sin.sin6_scope_id;
+        address -> port = ENET_NET_TO_HOST_16 (sin.sin6_port);
     }
 
@@ -276 +271 @@
 {
     struct msghdr msgHdr;
-    struct sockaddr_in sin;
+    struct sockaddr_in6 sin;
     int sentLength;
 
@@ -283 +278 @@
     if (address != NULL)
     {
-        memset (& sin, 0, sizeof (struct sockaddr_in));
-
-        sin.sin_family = AF_INET;
-        sin.sin_port = ENET_HOST_TO_NET_16 (address -> port);
-        sin.sin_addr.s_addr = address -> host;
+        memset (& sin, 0, sizeof (struct sockaddr_in6));
+
+        sin.sin6_family = AF_INET6;
+        sin.sin6_port = ENET_HOST_TO_NET_16 (address -> port);
+        sin.sin6_addr = * (struct in6_addr *) & address -> host;
+        sin.sin6_scope_id = address -> scopeID;
 
         msgHdr.msg_name = & sin;
-        msgHdr.msg_namelen = sizeof (struct sockaddr_in);
+        msgHdr.msg_namelen = sizeof (struct sockaddr_in6);
     }
 
@@ -316 +312 @@
 {
     struct msghdr msgHdr;
-    struct sockaddr_in sin;
+    struct sockaddr_in6 sin;
     int recvLength;
 
@@ -324 +320 @@
     {
         msgHdr.msg_name = & sin;
-        msgHdr.msg_namelen = sizeof (struct sockaddr_in);
+        msgHdr.msg_namelen = sizeof (struct sockaddr_in6);
     }
 
@@ -347 +343 @@
     if (address != NULL)
     {
-        address -> host = (enet_uint32) sin.sin_addr.s_addr;
-        address -> port = ENET_NET_TO_HOST_16 (sin.sin_port);
+        address -> host = * (ENetHostAddress *) & sin.sin6_addr;
+        address -> scopeID = sin.sin6_scope_id;
+        address -> port = ENET_NET_TO_HOST_16 (sin.sin6_port);
     }