int localhost_only; /* for listening sockets */
char oobdata[1];
int sending_oob;
- int oobinline;
+ int oobinline, nodelay, keepalive, privport;
+ SockAddr addr;
+ int port;
int pending_error; /* in case send() returns error */
/*
* We sometimes need pairs of Socket structures to be linked:
* on the commandline for selecting a default protocol.
*/
int family;
- unsigned long address; /* Address IPv4 style. */
#ifndef NO_IPV6
- struct addrinfo *ai; /* Address AF-independent (IPv4+IPv6) style. */
+ struct addrinfo *ais; /* Addresses IPv6 style. */
+ struct addrinfo *ai; /* steps along the linked list */
#endif
+ unsigned long *addresses; /* Addresses IPv4 style. */
+ int naddresses, curraddr;
char hostname[512]; /* Store an unresolved host name. */
};
#define DECL_WINSOCK_FUNCTION(linkage, rettype, name, params) \
typedef rettype (WINAPI *t_##name) params; \
linkage t_##name p_##name
-#define GET_WINSOCK_FUNCTION(name) \
- p_##name = (t_##name) GetProcAddress(winsock_module, #name)
+#define GET_WINSOCK_FUNCTION(module, name) \
+ p_##name = (t_##name) GetProcAddress(module, #name)
DECL_WINSOCK_FUNCTION(NOTHING, int, WSAAsyncSelect,
(SOCKET, HWND, u_int, long));
(SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD,
LPDWORD, LPWSAOVERLAPPED,
LPWSAOVERLAPPED_COMPLETION_ROUTINE));
+#ifndef NO_IPV6
+DECL_WINSOCK_FUNCTION(static, int, getaddrinfo,
+ (const char *nodename, const char *servname,
+ const struct addrinfo *hints, struct addrinfo **res));
+DECL_WINSOCK_FUNCTION(static, void, freeaddrinfo, (struct addrinfo *res));
+DECL_WINSOCK_FUNCTION(static, int, getnameinfo,
+ (const struct sockaddr FAR * sa, socklen_t salen,
+ char FAR * host, size_t hostlen, char FAR * serv,
+ size_t servlen, int flags));
+#endif
static HMODULE winsock_module;
+#ifndef NO_IPV6
+static HMODULE wship6_module;
+#endif
void sk_init(void)
{
if (!winsock_module)
fatalbox("Unable to load any WinSock library");
- GET_WINSOCK_FUNCTION(WSAAsyncSelect);
- GET_WINSOCK_FUNCTION(WSAEventSelect);
- GET_WINSOCK_FUNCTION(select);
- GET_WINSOCK_FUNCTION(WSAGetLastError);
- GET_WINSOCK_FUNCTION(WSAEnumNetworkEvents);
- GET_WINSOCK_FUNCTION(WSAStartup);
- GET_WINSOCK_FUNCTION(WSACleanup);
- GET_WINSOCK_FUNCTION(closesocket);
- GET_WINSOCK_FUNCTION(ntohl);
- GET_WINSOCK_FUNCTION(htonl);
- GET_WINSOCK_FUNCTION(htons);
- GET_WINSOCK_FUNCTION(ntohs);
- GET_WINSOCK_FUNCTION(gethostbyname);
- GET_WINSOCK_FUNCTION(getservbyname);
- GET_WINSOCK_FUNCTION(inet_addr);
- GET_WINSOCK_FUNCTION(inet_ntoa);
- GET_WINSOCK_FUNCTION(connect);
- GET_WINSOCK_FUNCTION(bind);
- GET_WINSOCK_FUNCTION(setsockopt);
- GET_WINSOCK_FUNCTION(socket);
- GET_WINSOCK_FUNCTION(listen);
- GET_WINSOCK_FUNCTION(send);
- GET_WINSOCK_FUNCTION(ioctlsocket);
- GET_WINSOCK_FUNCTION(accept);
- GET_WINSOCK_FUNCTION(recv);
- GET_WINSOCK_FUNCTION(WSAIoctl);
+#ifndef NO_IPV6
+ wship6_module = LoadLibrary("wship6.dll");
+ if (wship6_module) {
+ GET_WINSOCK_FUNCTION(wship6_module, getaddrinfo);
+ GET_WINSOCK_FUNCTION(wship6_module, freeaddrinfo);
+ GET_WINSOCK_FUNCTION(wship6_module, getnameinfo);
+ }
+#endif
+
+ GET_WINSOCK_FUNCTION(winsock_module, WSAAsyncSelect);
+ GET_WINSOCK_FUNCTION(winsock_module, WSAEventSelect);
+ GET_WINSOCK_FUNCTION(winsock_module, select);
+ GET_WINSOCK_FUNCTION(winsock_module, WSAGetLastError);
+ GET_WINSOCK_FUNCTION(winsock_module, WSAEnumNetworkEvents);
+ GET_WINSOCK_FUNCTION(winsock_module, WSAStartup);
+ GET_WINSOCK_FUNCTION(winsock_module, WSACleanup);
+ GET_WINSOCK_FUNCTION(winsock_module, closesocket);
+ GET_WINSOCK_FUNCTION(winsock_module, ntohl);
+ GET_WINSOCK_FUNCTION(winsock_module, htonl);
+ GET_WINSOCK_FUNCTION(winsock_module, htons);
+ GET_WINSOCK_FUNCTION(winsock_module, ntohs);
+ GET_WINSOCK_FUNCTION(winsock_module, gethostbyname);
+ GET_WINSOCK_FUNCTION(winsock_module, getservbyname);
+ GET_WINSOCK_FUNCTION(winsock_module, inet_addr);
+ GET_WINSOCK_FUNCTION(winsock_module, inet_ntoa);
+ GET_WINSOCK_FUNCTION(winsock_module, connect);
+ GET_WINSOCK_FUNCTION(winsock_module, bind);
+ GET_WINSOCK_FUNCTION(winsock_module, setsockopt);
+ GET_WINSOCK_FUNCTION(winsock_module, socket);
+ GET_WINSOCK_FUNCTION(winsock_module, listen);
+ GET_WINSOCK_FUNCTION(winsock_module, send);
+ GET_WINSOCK_FUNCTION(winsock_module, ioctlsocket);
+ GET_WINSOCK_FUNCTION(winsock_module, accept);
+ GET_WINSOCK_FUNCTION(winsock_module, recv);
+ GET_WINSOCK_FUNCTION(winsock_module, WSAIoctl);
if (p_WSAStartup(winsock_ver, &wsadata)) {
fatalbox("Unable to initialise WinSock");
p_WSACleanup();
if (winsock_module)
FreeLibrary(winsock_module);
+ if (wship6_module)
+ FreeLibrary(wship6_module);
}
char *winsock_error_string(int error)
if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) {
#ifndef NO_IPV6
-
- /* Try to get the getaddrinfo() function from wship6.dll */
- /* This way one doesn't need to have IPv6 dll's to use PuTTY and
- * it will fallback to IPv4. */
- typedef int (CALLBACK * FGETADDRINFO) (const char *nodename,
- const char *servname,
- const struct addrinfo *hints,
- struct addrinfo **res);
- FGETADDRINFO fGetAddrInfo = NULL;
-
- HINSTANCE dllWSHIP6 = LoadLibrary("wship6.dll");
- if (dllWSHIP6)
- fGetAddrInfo = (FGETADDRINFO) GetProcAddress(dllWSHIP6,
- "getaddrinfo");
-
/*
- * Use fGetAddrInfo when it's available
+ * Use getaddrinfo when it's available
*/
- if (fGetAddrInfo) {
+ if (p_getaddrinfo) {
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = ret->family;
- if ((err = fGetAddrInfo(host, NULL, &hints, &ret->ai)) == 0)
- ret_family = ret->ai->ai_family;
+ if ((err = p_getaddrinfo(host, NULL, &hints, &ret->ais)) == 0)
+ ret_family = ret->ais->ai_family;
+ ret->ai = ret->ais;
} else
#endif
{
err == WSAHOST_NOT_FOUND ? "Host does not exist" :
err == WSATRY_AGAIN ? "Host not found" :
#ifndef NO_IPV6
- fGetAddrInfo ? "getaddrinfo: unknown error" :
+ p_getaddrinfo ? "getaddrinfo: unknown error" :
#endif
"gethostbyname: unknown error");
} else {
#ifndef NO_IPV6
/* If we got an address info use that... */
if (ret->ai) {
- typedef int (CALLBACK * FGETNAMEINFO)
- (const struct sockaddr FAR * sa, socklen_t salen,
- char FAR * host, size_t hostlen, char FAR * serv,
- size_t servlen, int flags);
- FGETNAMEINFO fGetNameInfo = NULL;
-
/* Are we in IPv4 fallback mode? */
/* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */
if (ret->family == AF_INET)
ai_addr)->sin_addr, sizeof(a));
/* Now let's find that canonicalname... */
- if ((dllWSHIP6)
- && (fGetNameInfo =
- (FGETNAMEINFO) GetProcAddress(dllWSHIP6,
- "getnameinfo"))) {
- if (fGetNameInfo
+ if (p_getnameinfo) {
+ if (p_getnameinfo
((struct sockaddr *) ret->ai->ai_addr,
ret->family ==
AF_INET ? sizeof(SOCKADDR_IN) :
else
#endif
{
+ int n;
+ for (n = 0; h->h_addr_list[n]; n++);
+ ret->addresses = snewn(n, unsigned long);
+ ret->naddresses = n;
+ for (n = 0; n < ret->naddresses; n++) {
+ memcpy(&a, h->h_addr_list[n], sizeof(a));
+ ret->addresses[n] = p_ntohl(a);
+ }
+ ret->curraddr = 0;
memcpy(&a, h->h_addr, sizeof(a));
/* This way we are always sure the h->h_name is valid :) */
strncpy(realhost, h->h_name, sizeof(realhost));
}
}
-#ifndef NO_IPV6
- FreeLibrary(dllWSHIP6);
-#endif
} else {
/*
* This must be a numeric IPv4 address because it caused a
* success return from inet_addr.
*/
+ ret->addresses = snewn(1, unsigned long);
+ ret->naddresses = 1;
+ ret->curraddr = 0;
+ ret->addresses[0] = p_ntohl(a);
ret->family = AF_INET;
strncpy(realhost, host, sizeof(realhost));
}
- ret->address = p_ntohl(a);
realhost[lenof(realhost)-1] = '\0';
*canonicalname = snewn(1+strlen(realhost), char);
strcpy(*canonicalname, realhost);
return ret;
}
+int sk_nextaddr(SockAddr addr)
+{
+#ifndef NO_IPV6
+ if (addr->ai) {
+ if (addr->ai->ai_next) {
+ addr->ai = addr->ai->ai_next;
+ addr->family = addr->ai->ai_family;
+ return TRUE;
+ } else
+ return FALSE;
+ }
+#endif
+ if (addr->curraddr+1 < addr->naddresses) {
+ addr->curraddr++;
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+}
+
void sk_getaddr(SockAddr addr, char *buf, int buflen)
{
#ifndef NO_IPV6
- if (addr->family == AF_INET6) {
+ if (addr->ai) {
/* Try to get the WSAAddressToStringA() function from wship6.dll */
/* This way one doesn't need to have IPv6 dll's to use PuTTY and
* it will fallback to IPv4. */
#endif
if (addr->family == AF_INET) {
struct in_addr a;
- a.s_addr = p_htonl(addr->address);
+ assert(addr->addresses && addr->curraddr < addr->naddresses);
+ a.s_addr = p_htonl(addr->addresses[addr->curraddr]);
strncpy(buf, p_inet_ntoa(a), buflen);
buf[buflen-1] = '\0';
} else {
#endif
if (addr->family == AF_INET) {
struct in_addr a;
- a.s_addr = p_htonl(addr->address);
+ assert(addr->addresses && addr->curraddr < addr->naddresses);
+ a.s_addr = p_htonl(addr->addresses[addr->curraddr]);
return ipv4_is_local_addr(a);
} else {
assert(addr->family == AF_UNSPEC);
{
assert(addr->family != AF_UNSPEC);
#ifndef NO_IPV6
- if (addr->family == AF_INET6) {
- memcpy(buf, (char*) addr->ai, 16);
+ if (addr->ai) {
+ if (addr->family == AF_INET)
+ memcpy(buf, &((struct sockaddr_in *)addr->ai->ai_addr)->sin_addr,
+ sizeof(struct in_addr));
+ else if (addr->family == AF_INET6)
+ memcpy(buf, &((struct sockaddr_in6 *)addr->ai->ai_addr)->sin6_addr,
+ sizeof(struct in6_addr));
+ else
+ assert(FALSE);
} else
#endif
if (addr->family == AF_INET) {
struct in_addr a;
- a.s_addr = p_htonl(addr->address);
+ assert(addr->addresses && addr->curraddr < addr->naddresses);
+ a.s_addr = p_htonl(addr->addresses[addr->curraddr]);
memcpy(buf, (char*) &a.s_addr, 4);
}
}
void sk_addr_free(SockAddr addr)
{
+#ifndef NO_IPV6
+ if (addr->ais && p_freeaddrinfo)
+ p_freeaddrinfo(addr->ais);
+#endif
+ if (addr->addresses)
+ sfree(addr->addresses);
sfree(addr);
}
ret->localhost_only = 0; /* unused, but best init anyway */
ret->pending_error = 0;
ret->parent = ret->child = NULL;
+ ret->addr = NULL;
ret->s = (SOCKET)sock;
return (Socket) ret;
}
-Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
- int nodelay, int keepalive, Plug plug)
+static DWORD try_connect(Actual_Socket sock)
{
- static const struct socket_function_table fn_table = {
- sk_tcp_plug,
- sk_tcp_close,
- sk_tcp_write,
- sk_tcp_write_oob,
- sk_tcp_flush,
- sk_tcp_set_private_ptr,
- sk_tcp_get_private_ptr,
- sk_tcp_set_frozen,
- sk_tcp_socket_error
- };
-
SOCKET s;
#ifndef NO_IPV6
SOCKADDR_IN6 a6;
SOCKADDR_IN a;
DWORD err;
char *errstr;
- Actual_Socket ret;
short localport;
+ int family;
- /*
- * Create Socket structure.
- */
- ret = snew(struct Socket_tag);
- ret->fn = &fn_table;
- ret->error = NULL;
- ret->plug = plug;
- bufchain_init(&ret->output_data);
- ret->connected = 0; /* to start with */
- ret->writable = 0; /* to start with */
- ret->sending_oob = 0;
- ret->frozen = 0;
- ret->frozen_readable = 0;
- ret->localhost_only = 0; /* unused, but best init anyway */
- ret->pending_error = 0;
- ret->parent = ret->child = NULL;
+ if (sock->s != INVALID_SOCKET) {
+ do_select(sock->s, 0);
+ p_closesocket(sock->s);
+ }
+
+ plug_log(sock->plug, 0, sock->addr, sock->port, NULL, 0);
/*
* Open socket.
#ifndef NO_IPV6
/* Let's default to IPv6, this shouldn't hurt anybody
* If the stack supports IPv6 it will also allow IPv4 connections. */
- if (addr->family == AF_UNSPEC) addr->family = AF_INET6;
-#else
- /* No other choice, default to IPv4 */
- if (addr->family == AF_UNSPEC) addr->family = AF_INET;
+ if (sock->addr->ai) {
+ family = sock->addr->ai->ai_family;
+ } else
#endif
- s = p_socket(addr->family, SOCK_STREAM, 0);
- ret->s = s;
+ {
+ /* Default to IPv4 */
+ family = AF_INET;
+ }
+
+ s = p_socket(family, SOCK_STREAM, 0);
+ sock->s = s;
if (s == INVALID_SOCKET) {
err = p_WSAGetLastError();
- ret->error = winsock_error_string(err);
- return (Socket) ret;
+ sock->error = winsock_error_string(err);
+ goto ret;
}
- ret->oobinline = oobinline;
- if (oobinline) {
+ if (sock->oobinline) {
BOOL b = TRUE;
p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b));
}
- if (nodelay) {
+ if (sock->nodelay) {
BOOL b = TRUE;
p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b));
}
- if (keepalive) {
+ if (sock->keepalive) {
BOOL b = TRUE;
p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b));
}
/*
* Bind to local address.
*/
- if (privport)
+ if (sock->privport)
localport = 1023; /* count from 1023 downwards */
else
localport = 0; /* just use port 0 (ie winsock picks) */
/* Loop round trying to bind */
while (1) {
- int retcode;
+ int sockcode;
#ifndef NO_IPV6
- if (addr->family == AF_INET6) {
+ if (family == AF_INET6) {
memset(&a6, 0, sizeof(a6));
a6.sin6_family = AF_INET6;
/*a6.sin6_addr = in6addr_any; */ /* == 0 done by memset() */
a.sin_port = p_htons(localport);
}
#ifndef NO_IPV6
- retcode = p_bind(s, (addr->family == AF_INET6 ?
+ sockcode = p_bind(s, (sock->addr->family == AF_INET6 ?
(struct sockaddr *) &a6 :
(struct sockaddr *) &a),
- (addr->family ==
+ (sock->addr->family ==
AF_INET6 ? sizeof(a6) : sizeof(a)));
#else
- retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a));
+ sockcode = p_bind(s, (struct sockaddr *) &a, sizeof(a));
#endif
- if (retcode != SOCKET_ERROR) {
+ if (sockcode != SOCKET_ERROR) {
err = 0;
break; /* done */
} else {
}
if (err) {
- ret->error = winsock_error_string(err);
- return (Socket) ret;
+ sock->error = winsock_error_string(err);
+ goto ret;
}
/*
* Connect to remote address.
*/
#ifndef NO_IPV6
- if (addr->family == AF_INET6) {
- memset(&a, 0, sizeof(a));
- a6.sin6_family = AF_INET6;
- a6.sin6_port = p_htons((short) port);
- a6.sin6_addr =
- ((struct sockaddr_in6 *) addr->ai->ai_addr)->sin6_addr;
+ if (sock->addr->ai) {
+ if (family == AF_INET6) {
+ a6.sin6_family = AF_INET6;
+ a6.sin6_port = p_htons((short) sock->port);
+ a6.sin6_addr =
+ ((struct sockaddr_in6 *) sock->addr->ai->ai_addr)->sin6_addr;
+ } else {
+ a.sin_family = AF_INET;
+ a.sin_addr =
+ ((struct sockaddr_in *) sock->addr->ai->ai_addr)->sin_addr;
+ a.sin_port = p_htons((short) sock->port);
+ }
} else
#endif
{
+ assert(sock->addr->addresses && sock->addr->curraddr < sock->addr->naddresses);
a.sin_family = AF_INET;
- a.sin_addr.s_addr = p_htonl(addr->address);
- a.sin_port = p_htons((short) port);
+ a.sin_addr.s_addr = p_htonl(sock->addr->addresses[sock->addr->curraddr]);
+ a.sin_port = p_htons((short) sock->port);
}
/* Set up a select mechanism. This could be an AsyncSelect on a
* window, or an EventSelect on an event object. */
errstr = do_select(s, 1);
if (errstr) {
- ret->error = errstr;
- return (Socket) ret;
+ sock->error = errstr;
+ err = 1;
+ goto ret;
}
if ((
#ifndef NO_IPV6
- p_connect(s, ((addr->family == AF_INET6) ?
- (struct sockaddr *) &a6 : (struct sockaddr *) &a),
- (addr->family == AF_INET6) ? sizeof(a6) : sizeof(a))
+ p_connect(s,
+ ((family == AF_INET6) ? (struct sockaddr *) &a6 :
+ (struct sockaddr *) &a),
+ (family == AF_INET6) ? sizeof(a6) : sizeof(a))
#else
p_connect(s, (struct sockaddr *) &a, sizeof(a))
#endif
* asynchronously.
*/
if ( err != WSAEWOULDBLOCK ) {
- ret->error = winsock_error_string(err);
- return (Socket) ret;
+ sock->error = winsock_error_string(err);
+ goto ret;
}
} else {
/*
* If we _don't_ get EWOULDBLOCK, the connect has completed
* and we should set the socket as writable.
*/
- ret->writable = 1;
+ sock->writable = 1;
}
- add234(sktree, ret);
+ add234(sktree, sock);
+
+ err = 0;
- /* We're done with 'addr' now. */
- sk_addr_free(addr);
+ ret:
+ if (err)
+ plug_log(sock->plug, 1, sock->addr, sock->port, sock->error, err);
+ return err;
+}
+
+Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
+ int nodelay, int keepalive, Plug plug)
+{
+ static const struct socket_function_table fn_table = {
+ sk_tcp_plug,
+ sk_tcp_close,
+ sk_tcp_write,
+ sk_tcp_write_oob,
+ sk_tcp_flush,
+ sk_tcp_set_private_ptr,
+ sk_tcp_get_private_ptr,
+ sk_tcp_set_frozen,
+ sk_tcp_socket_error
+ };
+
+ Actual_Socket ret;
+ DWORD err;
+
+ /*
+ * Create Socket structure.
+ */
+ ret = snew(struct Socket_tag);
+ ret->fn = &fn_table;
+ ret->error = NULL;
+ ret->plug = plug;
+ bufchain_init(&ret->output_data);
+ ret->connected = 0; /* to start with */
+ ret->writable = 0; /* to start with */
+ ret->sending_oob = 0;
+ ret->frozen = 0;
+ ret->frozen_readable = 0;
+ ret->localhost_only = 0; /* unused, but best init anyway */
+ ret->pending_error = 0;
+ ret->parent = ret->child = NULL;
+ ret->oobinline = oobinline;
+ ret->nodelay = nodelay;
+ ret->keepalive = keepalive;
+ ret->privport = privport;
+ ret->port = port;
+ ret->addr = addr;
+ ret->s = INVALID_SOCKET;
+
+ err = 0;
+ do {
+ err = try_connect(ret);
+ } while (err && sk_nextaddr(ret->addr));
return (Socket) ret;
}
ret->localhost_only = local_host_only;
ret->pending_error = 0;
ret->parent = ret->child = NULL;
+ ret->addr = NULL;
/*
* Translate address_family from platform-independent constants
del234(sktree, s);
do_select(s->s, 0);
p_closesocket(s->s);
+ if (s->addr)
+ sk_addr_free(s->addr);
sfree(s);
}
* An error has occurred on this socket. Pass it to the
* plug.
*/
- return plug_closing(s->plug, winsock_error_string(err), err, 0);
+ if (s->addr) {
+ plug_log(s->plug, 1, s->addr, s->port,
+ winsock_error_string(err), err);
+ while (s->addr && sk_nextaddr(s->addr)) {
+ err = try_connect(s);
+ }
+ }
+ if (err != 0)
+ return plug_closing(s->plug, winsock_error_string(err), err, 0);
+ else
+ return 1;
}
noise_ultralight(lParam);
switch (WSAGETSELECTEVENT(lParam)) {
case FD_CONNECT:
s->connected = s->writable = 1;
+ /*
+ * Once a socket is connected, we can stop falling
+ * back through the candidate addresses to connect
+ * to.
+ */
+ if (s->addr) {
+ sk_addr_free(s->addr);
+ s->addr = NULL;
+ }
break;
case FD_READ:
/* In the case the socket is still frozen, we don't even bother */
projects / u / mdw / putty / blobdiff