struct Socket_tag {
const struct socket_function_table *fn;
/* the above variable absolutely *must* be the first in this structure */
- char *error;
+ const char *error;
SOCKET s;
Plug plug;
- void *private_ptr;
bufchain output_data;
int connected;
int writable;
int refcount;
char *error;
int resolved;
+ int namedpipe; /* indicates that this SockAddr is phony, holding a Windows
+ * named pipe pathname instead of a network address */
#ifndef NO_IPV6
struct addrinfo *ais; /* Addresses IPv6 style. */
#endif
static int cmpforsearch(void *av, void *bv)
{
Actual_Socket b = (Actual_Socket) bv;
- unsigned long as = (unsigned long) av, bs = (unsigned long) b->s;
+ uintptr_t as = (uintptr_t) av, bs = (uintptr_t) b->s;
if (as < bs)
return -1;
if (as > bs)
(const char FAR *, const char FAR *));
DECL_WINDOWS_FUNCTION(static, unsigned long, inet_addr, (const char FAR *));
DECL_WINDOWS_FUNCTION(static, char FAR *, inet_ntoa, (struct in_addr));
+DECL_WINDOWS_FUNCTION(static, const char FAR *, inet_ntop,
+ (int, void FAR *, char *, size_t));
DECL_WINDOWS_FUNCTION(static, int, connect,
(SOCKET, const struct sockaddr FAR *, int));
DECL_WINDOWS_FUNCTION(static, int, bind,
(SOCKET, long, u_long FAR *));
DECL_WINDOWS_FUNCTION(static, SOCKET, accept,
(SOCKET, struct sockaddr FAR *, int FAR *));
+DECL_WINDOWS_FUNCTION(static, int, getpeername,
+ (SOCKET, struct sockaddr FAR *, int FAR *));
DECL_WINDOWS_FUNCTION(static, int, recv, (SOCKET, char FAR *, int, int));
DECL_WINDOWS_FUNCTION(static, int, WSAIoctl,
(SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD,
GET_WINDOWS_FUNCTION(winsock_module, getservbyname);
GET_WINDOWS_FUNCTION(winsock_module, inet_addr);
GET_WINDOWS_FUNCTION(winsock_module, inet_ntoa);
+ GET_WINDOWS_FUNCTION(winsock_module, inet_ntop);
GET_WINDOWS_FUNCTION(winsock_module, connect);
GET_WINDOWS_FUNCTION(winsock_module, bind);
GET_WINDOWS_FUNCTION(winsock_module, setsockopt);
GET_WINDOWS_FUNCTION(winsock_module, shutdown);
GET_WINDOWS_FUNCTION(winsock_module, ioctlsocket);
GET_WINDOWS_FUNCTION(winsock_module, accept);
+ GET_WINDOWS_FUNCTION(winsock_module, getpeername);
GET_WINDOWS_FUNCTION(winsock_module, recv);
GET_WINDOWS_FUNCTION(winsock_module, WSAIoctl);
#endif
}
-char *winsock_error_string(int error)
+struct errstring {
+ int error;
+ char *text;
+};
+
+static int errstring_find(void *av, void *bv)
+{
+ int *a = (int *)av;
+ struct errstring *b = (struct errstring *)bv;
+ if (*a < b->error)
+ return -1;
+ if (*a > b->error)
+ return +1;
+ return 0;
+}
+static int errstring_compare(void *av, void *bv)
{
+ struct errstring *a = (struct errstring *)av;
+ return errstring_find(&a->error, bv);
+}
+
+static tree234 *errstrings = NULL;
+
+const char *winsock_error_string(int error)
+{
+ const char prefix[] = "Network error: ";
+ struct errstring *es;
+
+ /*
+ * Error codes we know about and have historically had reasonably
+ * sensible error messages for.
+ */
switch (error) {
case WSAEACCES:
return "Network error: Permission denied";
return "Network error: Resource temporarily unavailable";
case WSAEDISCON:
return "Network error: Graceful shutdown in progress";
- default:
- return "Unknown network error";
}
+
+ /*
+ * Generic code to handle any other error.
+ *
+ * Slightly nasty hack here: we want to return a static string
+ * which the caller will never have to worry about freeing, but on
+ * the other hand if we call FormatMessage to get it then it will
+ * want to either allocate a buffer or write into one we own.
+ *
+ * So what we do is to maintain a tree234 of error strings we've
+ * already used. New ones are allocated from the heap, but then
+ * put in this tree and kept forever.
+ */
+
+ if (!errstrings)
+ errstrings = newtree234(errstring_compare);
+
+ es = find234(errstrings, &error, errstring_find);
+
+ if (!es) {
+ int bufsize, bufused;
+
+ es = snew(struct errstring);
+ es->error = error;
+ /* maximum size for FormatMessage is 64K */
+ bufsize = 65535 + sizeof(prefix);
+ es->text = snewn(bufsize, char);
+ strcpy(es->text, prefix);
+ bufused = strlen(es->text);
+ if (!FormatMessage((FORMAT_MESSAGE_FROM_SYSTEM |
+ FORMAT_MESSAGE_IGNORE_INSERTS), NULL, error,
+ MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+ es->text + bufused, bufsize - bufused, NULL)) {
+ sprintf(es->text + bufused,
+ "Windows error code %d (and FormatMessage returned %u)",
+ error, (unsigned int)GetLastError());
+ } else {
+ int len = strlen(es->text);
+ if (len > 0 && es->text[len-1] == '\n')
+ es->text[len-1] = '\0';
+ }
+ es->text = sresize(es->text, strlen(es->text) + 1, char);
+ add234(errstrings, es);
+ }
+
+ return es->text;
}
SockAddr sk_namelookup(const char *host, char **canonicalname,
#ifndef NO_IPV6
ret->ais = NULL;
#endif
+ ret->namedpipe = FALSE;
ret->addresses = NULL;
ret->resolved = FALSE;
ret->refcount = 1;
memset(&hints, 0, sizeof(hints));
hints.ai_family = hint_family;
hints.ai_flags = AI_CANONNAME;
- if ((err = p_getaddrinfo(host, NULL, &hints, &ret->ais)) == 0)
+ {
+ /* strip [] on IPv6 address literals */
+ char *trimmed_host = host_strduptrim(host);
+ err = p_getaddrinfo(trimmed_host, NULL, &hints, &ret->ais);
+ sfree(trimmed_host);
+ }
+ if (err == 0)
ret->resolved = TRUE;
} else
#endif
#ifndef NO_IPV6
ret->ais = NULL;
#endif
+ ret->namedpipe = FALSE;
ret->addresses = NULL;
ret->naddresses = 0;
ret->refcount = 1;
return ret;
}
+SockAddr sk_namedpipe_addr(const char *pipename)
+{
+ SockAddr ret = snew(struct SockAddr_tag);
+ ret->error = NULL;
+ ret->resolved = FALSE;
+#ifndef NO_IPV6
+ ret->ais = NULL;
+#endif
+ ret->namedpipe = TRUE;
+ ret->addresses = NULL;
+ ret->naddresses = 0;
+ ret->refcount = 1;
+ strncpy(ret->hostname, pipename, lenof(ret->hostname));
+ ret->hostname[lenof(ret->hostname)-1] = '\0';
+ return ret;
+}
+
int sk_nextaddr(SockAddr addr, SockAddrStep *step)
{
#ifndef NO_IPV6
}
}
-int sk_hostname_is_local(char *name)
+int sk_addr_needs_port(SockAddr addr)
+{
+ return addr->namedpipe ? FALSE : TRUE;
+}
+
+int sk_hostname_is_local(const char *name)
{
return !strcmp(name, "localhost") ||
!strcmp(name, "::1") ||
#ifndef NO_IPV6
if (family == AF_INET6) {
- return IN6_IS_ADDR_LOOPBACK((const struct in6_addr *)step.ai->ai_addr);
+ return IN6_IS_ADDR_LOOPBACK(&((const struct sockaddr_in6 *)step.ai->ai_addr)->sin6_addr);
} else
#endif
if (family == AF_INET) {
}
}
+int sk_address_is_special_local(SockAddr addr)
+{
+ return 0; /* no Unix-domain socket analogue here */
+}
+
int sk_addrtype(SockAddr addr)
{
SockAddrStep step;
static int sk_tcp_write(Socket s, const char *data, int len);
static int sk_tcp_write_oob(Socket s, const char *data, int len);
static void sk_tcp_write_eof(Socket s);
-static void sk_tcp_set_private_ptr(Socket s, void *ptr);
-static void *sk_tcp_get_private_ptr(Socket s);
static void sk_tcp_set_frozen(Socket s, int is_frozen);
static const char *sk_tcp_socket_error(Socket s);
+static char *sk_tcp_peer_info(Socket s);
extern char *do_select(SOCKET skt, int startup);
-Socket sk_register(void *sock, Plug plug)
+static Socket sk_tcp_accept(accept_ctx_t ctx, Plug plug)
{
static const struct socket_function_table fn_table = {
sk_tcp_plug,
sk_tcp_write_oob,
sk_tcp_write_eof,
sk_tcp_flush,
- sk_tcp_set_private_ptr,
- sk_tcp_get_private_ptr,
sk_tcp_set_frozen,
- sk_tcp_socket_error
+ sk_tcp_socket_error,
+ sk_tcp_peer_info,
};
DWORD err;
ret->parent = ret->child = NULL;
ret->addr = NULL;
- ret->s = (SOCKET)sock;
+ ret->s = (SOCKET)ctx.p;
if (ret->s == INVALID_SOCKET) {
err = p_WSAGetLastError();
sk_tcp_write_oob,
sk_tcp_write_eof,
sk_tcp_flush,
- sk_tcp_set_private_ptr,
- sk_tcp_get_private_ptr,
sk_tcp_set_frozen,
- sk_tcp_socket_error
+ sk_tcp_socket_error,
+ sk_tcp_peer_info,
};
Actual_Socket ret;
return (Socket) ret;
}
-Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only,
- int orig_address_family)
+Socket sk_newlistener(const char *srcaddr, int port, Plug plug,
+ int local_host_only, int orig_address_family)
{
static const struct socket_function_table fn_table = {
sk_tcp_plug,
sk_tcp_write_oob,
sk_tcp_write_eof,
sk_tcp_flush,
- sk_tcp_set_private_ptr,
- sk_tcp_get_private_ptr,
sk_tcp_set_frozen,
- sk_tcp_socket_error
+ sk_tcp_socket_error,
+ sk_tcp_peer_info,
};
SOCKET s;
if (address_family == AF_INET6) {
memset(&a6, 0, sizeof(a6));
a6.sin6_family = AF_INET6;
- /* FIXME: srcaddr is ignored for IPv6, because I (SGT) don't
- * know how to do it. :-)
- * (jeroen:) saddr is specified as an address.. eg 2001:db8::1
- * Thus we need either a parser that understands [2001:db8::1]:80
- * style addresses and/or enhance this to understand hostnames too. */
if (local_host_only)
a6.sin6_addr = in6addr_loopback;
else
a6.sin6_addr = in6addr_any;
+ if (srcaddr != NULL && p_getaddrinfo) {
+ struct addrinfo hints;
+ struct addrinfo *ai;
+ int err;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_INET6;
+ hints.ai_flags = 0;
+ {
+ /* strip [] on IPv6 address literals */
+ char *trimmed_addr = host_strduptrim(srcaddr);
+ err = p_getaddrinfo(trimmed_addr, NULL, &hints, &ai);
+ sfree(trimmed_addr);
+ }
+ if (err == 0 && ai->ai_family == AF_INET6) {
+ a6.sin6_addr =
+ ((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr;
+ }
+ }
a6.sin6_port = p_htons(port);
} else
#endif
if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) {
p_closesocket(s);
- ret->error = winsock_error_string(err);
+ ret->error = winsock_error_string(p_WSAGetLastError());
return (Socket) ret;
}
sfree(s);
}
+/*
+ * Deal with socket errors detected in try_send().
+ */
+static void socket_error_callback(void *vs)
+{
+ Actual_Socket s = (Actual_Socket)vs;
+
+ /*
+ * Just in case other socket work has caused this socket to vanish
+ * or become somehow non-erroneous before this callback arrived...
+ */
+ if (!find234(sktree, s, NULL) || !s->pending_error)
+ return;
+
+ /*
+ * An error has occurred on this socket. Pass it to the plug.
+ */
+ plug_closing(s->plug, winsock_error_string(s->pending_error),
+ s->pending_error, 0);
+}
+
/*
* The function which tries to send on a socket once it's deemed
* writable.
* plug_closing()) at some suitable future moment.
*/
s->pending_error = err;
+ queue_toplevel_callback(socket_error_callback, s);
return;
} else {
/* We're inside the Windows frontend here, so we know
ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB);
noise_ultralight(ret);
if (ret <= 0) {
- char *str = (ret == 0 ? "Internal networking trouble" :
+ const char *str = (ret == 0 ? "Internal networking trouble" :
winsock_error_string(p_WSAGetLastError()));
/* We're inside the Windows frontend here, so we know
* that the frontend handle is unnecessary. */
#endif
int addrlen = sizeof(isa);
SOCKET t; /* socket of connection */
+ accept_ctx_t actx;
memset(&isa, 0, sizeof(isa));
err = 0;
if (err == WSATRY_AGAIN)
break;
}
+
+ actx.p = (void *)t;
+
#ifndef NO_IPV6
if (isa.ss_family == AF_INET &&
s->localhost_only &&
#endif
{
p_closesocket(t); /* dodgy WinSock let nonlocal through */
- } else if (plug_accepting(s->plug, (void*)t)) {
+ } else if (plug_accepting(s->plug, sk_tcp_accept, actx)) {
p_closesocket(t); /* denied or error */
}
}
return 1;
}
-/*
- * Deal with socket errors detected in try_send().
- */
-void net_pending_errors(void)
-{
- int i;
- Actual_Socket s;
-
- /*
- * This might be a fiddly business, because it's just possible
- * that handling a pending error on one socket might cause
- * others to be closed. (I can't think of any reason this might
- * happen in current SSH implementation, but to maintain
- * generality of this network layer I'll assume the worst.)
- *
- * So what we'll do is search the socket list for _one_ socket
- * with a pending error, and then handle it, and then search
- * the list again _from the beginning_. Repeat until we make a
- * pass with no socket errors present. That way we are
- * protected against the socket list changing under our feet.
- */
-
- do {
- for (i = 0; (s = index234(sktree, i)) != NULL; i++) {
- if (s->pending_error) {
- /*
- * An error has occurred on this socket. Pass it to the
- * plug.
- */
- plug_closing(s->plug,
- winsock_error_string(s->pending_error),
- s->pending_error, 0);
- break;
- }
- }
- } while (s);
-}
-
-/*
- * Each socket abstraction contains a `void *' private field in
- * which the client can keep state.
- */
-static void sk_tcp_set_private_ptr(Socket sock, void *ptr)
-{
- Actual_Socket s = (Actual_Socket) sock;
- s->private_ptr = ptr;
-}
-
-static void *sk_tcp_get_private_ptr(Socket sock)
-{
- Actual_Socket s = (Actual_Socket) sock;
- return s->private_ptr;
-}
-
/*
* Special error values are returned from sk_namelookup and sk_new
* if there's a problem. These functions extract an error message,
return s->error;
}
+static char *sk_tcp_peer_info(Socket sock)
+{
+ Actual_Socket s = (Actual_Socket) sock;
+#ifdef NO_IPV6
+ struct sockaddr_in addr;
+#else
+ struct sockaddr_storage addr;
+#endif
+ int addrlen = sizeof(addr);
+ char buf[INET6_ADDRSTRLEN];
+
+ if (p_getpeername(s->s, (struct sockaddr *)&addr, &addrlen) < 0)
+ return NULL;
+
+ if (((struct sockaddr *)&addr)->sa_family == AF_INET) {
+ return dupprintf
+ ("%s:%d",
+ p_inet_ntoa(((struct sockaddr_in *)&addr)->sin_addr),
+ (int)p_ntohs(((struct sockaddr_in *)&addr)->sin_port));
+#ifndef NO_IPV6
+ } else if (((struct sockaddr *)&addr)->sa_family == AF_INET6) {
+ return dupprintf
+ ("[%s]:%d",
+ p_inet_ntop(AF_INET6, &((struct sockaddr_in6 *)&addr)->sin6_addr,
+ buf, sizeof(buf)),
+ (int)p_ntohs(((struct sockaddr_in6 *)&addr)->sin6_port));
+#endif
+ } else {
+ return NULL;
+ }
+}
+
static void sk_tcp_set_frozen(Socket sock, int is_frozen)
{
Actual_Socket s = (Actual_Socket) sock;
projects / PuTTY.git / blobdiff