struct Socket_tag {
struct socket_function_table *fn;
/* the above variable absolutely *must* be the first in this structure */
- char *error;
+ const char *error;
int s;
Plug plug;
void *private_ptr;
typedef struct Socket_tag *Actual_Socket;
struct SockAddr_tag {
- char *error;
+ const char *error;
/*
* Which address family this address belongs to. AF_INET for
* IPv4; AF_INET6 for IPv6; AF_UNSPEC indicates that name
* in this SockAddr structure.
*/
int family;
- unsigned long address; /* Address IPv4 style. */
#ifdef IPV6
struct addrinfo *ai; /* Address IPv6 style. */
+#else
+ unsigned long address; /* Address IPv4 style. */
#endif
char hostname[512]; /* Store an unresolved host name. */
};
static tree234 *sktree;
+static void uxsel_tell(Actual_Socket s);
+
static int cmpfortree(void *av, void *bv)
{
Actual_Socket a = (Actual_Socket) av, b = (Actual_Socket) bv;
}
}
-char *error_string(int error)
+const char *error_string(int error)
{
return strerror(error);
}
-SockAddr sk_namelookup(char *host, char **canonicalname)
+SockAddr sk_namelookup(const char *host, char **canonicalname)
{
- SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
+ SockAddr ret = snew(struct SockAddr_tag);
+#ifdef IPV6
+ struct addrinfo hints;
+ int err;
+#else
unsigned long a;
struct hostent *h = NULL;
+#endif
char realhost[8192];
/* Clear the structure and default to IPv4. */
*realhost = '\0';
ret->error = NULL;
- if ((a = inet_addr(host)) == (unsigned long) INADDR_NONE) {
#ifdef IPV6
- if (getaddrinfo(host, NULL, NULL, &ret->ai) == 0) {
- ret->family = ret->ai->ai_family;
- } else
-#endif
- {
- /*
- * Otherwise use the IPv4-only gethostbyname... (NOTE:
- * we don't use gethostbyname as a fallback!)
- */
- if (ret->family == 0) {
+ hints.ai_flags = AI_CANONNAME;
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = 0;
+ hints.ai_protocol = 0;
+ hints.ai_addrlen = 0;
+ hints.ai_addr = NULL;
+ hints.ai_canonname = NULL;
+ hints.ai_next = NULL;
+ err = getaddrinfo(host, NULL, NULL, &ret->ai);
+ if (err != 0) {
+ ret->error = gai_strerror(err);
+ return ret;
+ }
+ ret->family = ret->ai->ai_family;
+ *realhost = '\0';
+ if (ret->ai->ai_canonname != NULL)
+ strncat(realhost, ret->ai->ai_canonname, sizeof(realhost) - 1);
+ else
+ strncat(realhost, host, sizeof(realhost) - 1);
+#else
+ if ((a = inet_addr(host)) == (unsigned long) INADDR_NONE) {
+ /*
+ * Otherwise use the IPv4-only gethostbyname... (NOTE:
+ * we don't use gethostbyname as a fallback!)
+ */
+ if (ret->family == 0) {
/*debug(("Resolving \"%s\" with gethostbyname() (IPv4 only)...\n", host)); */
if ( (h = gethostbyname(host)) )
- ret->family = AF_INET;
- }
- if (ret->family == 0) {
+ ret->family = AF_INET;
+ }
+ if (ret->family == 0) {
ret->error = (h_errno == HOST_NOT_FOUND ||
- h_errno == NO_DATA ||
- h_errno == NO_ADDRESS ? "Host does not exist" :
- h_errno == TRY_AGAIN ?
- "Temporary name service failure" :
- "gethostbyname: unknown error");
+ h_errno == NO_DATA ||
+ h_errno == NO_ADDRESS ? "Host does not exist" :
+ h_errno == TRY_AGAIN ?
+ "Temporary name service failure" :
+ "gethostbyname: unknown error");
return ret;
- }
- }
-
-#ifdef IPV6
- /* If we got an address info use that... */
- if (ret->ai) {
-
- /* 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)
- memcpy(&a,
- (char *) &((struct sockaddr_in *) ret->ai->
- ai_addr)->sin_addr, sizeof(a));
-
- /* Now let's find that canonicalname... */
- if (getnameinfo((struct sockaddr *) ret->ai->ai_addr,
- ret->family ==
- AF_INET ? sizeof(struct sockaddr_in) :
- sizeof(struct sockaddr_in6), realhost,
- sizeof(realhost), NULL, 0, 0) != 0) {
- strncpy(realhost, host, sizeof(realhost));
- }
- }
- /* We used the IPv4-only gethostbyname()... */
- else
-#endif
- {
- 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));
}
+ 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));
} else {
/*
* This must be a numeric IPv4 address because it caused a
strncpy(realhost, host, sizeof(realhost));
}
ret->address = ntohl(a);
+#endif
realhost[lenof(realhost)-1] = '\0';
- *canonicalname = smalloc(1+strlen(realhost));
+ *canonicalname = snewn(1+strlen(realhost), char);
strcpy(*canonicalname, realhost);
return ret;
}
-SockAddr sk_nonamelookup(char *host)
+SockAddr sk_nonamelookup(const char *host)
{
- SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
+ SockAddr ret = snew(struct SockAddr_tag);
ret->error = NULL;
ret->family = AF_UNSPEC;
strncpy(ret->hostname, host, lenof(ret->hostname));
void sk_getaddr(SockAddr addr, char *buf, int buflen)
{
+
+ if (addr->family == AF_UNSPEC) {
+ strncpy(buf, addr->hostname, buflen);
+ buf[buflen-1] = '\0';
+ } else {
#ifdef IPV6
- if (addr->family == AF_INET6) {
- FIXME; /* I don't know how to get a text form of an IPv6 address. */
- } else
-#endif
- if (addr->family == AF_INET) {
+ if (getnameinfo(addr->ai->ai_addr, addr->ai->ai_addrlen, buf, buflen,
+ NULL, 0, NI_NUMERICHOST) != 0) {
+ buf[0] = '\0';
+ strncat(buf, "<unknown>", buflen - 1);
+ }
+#else
struct in_addr a;
+ assert(addr->family == AF_INET);
a.s_addr = htonl(addr->address);
strncpy(buf, inet_ntoa(a), buflen);
buf[buflen-1] = '\0';
- } else {
- assert(addr->family == AF_UNSPEC);
- strncpy(buf, addr->hostname, buflen);
- buf[buflen-1] = '\0';
+#endif
}
}
int sk_address_is_local(SockAddr addr)
{
+
+ if (addr->family == AF_UNSPEC)
+ return 0; /* we don't know; assume not */
+ else {
#ifdef IPV6
- if (addr->family == AF_INET6) {
- FIXME; /* someone who can compile for IPV6 had better do this bit */
- } else
-#endif
- if (addr->family == AF_INET) {
+ if (addr->family == AF_INET)
+ return ipv4_is_loopback(
+ ((struct sockaddr_in *)addr->ai->ai_addr)->sin_addr);
+ else if (addr->family == AF_INET6)
+ return IN6_IS_ADDR_LOOPBACK(
+ &((struct sockaddr_in6 *)addr->ai->ai_addr)->sin6_addr);
+ else
+ return 0;
+#else
struct in_addr a;
+ assert(addr->family == AF_INET);
a.s_addr = htonl(addr->address);
return ipv4_is_loopback(a);
- } else {
- assert(addr->family == AF_UNSPEC);
- return 0; /* we don't know; assume not */
+#endif
}
}
void sk_addrcopy(SockAddr addr, char *buf)
{
- assert(addr->family != AF_UNSPEC);
+
#ifdef IPV6
- if (addr->family == AF_INET6) {
- memcpy(buf, (char*) addr->ai, 16);
- } else
+ 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
+ struct in_addr a;
+
+ assert(addr->family == AF_INET);
+ a.s_addr = htonl(addr->address);
+ memcpy(buf, (char*) &a.s_addr, 4);
#endif
- if (addr->family == AF_INET) {
- struct in_addr a;
- a.s_addr = htonl(addr->address);
- memcpy(buf, (char*) &a.s_addr, 4);
- }
}
void sk_addr_free(SockAddr addr)
{
+
+#ifdef IPV6
+ if (addr->ai != NULL)
+ freeaddrinfo(addr->ai);
+#endif
sfree(addr);
}
}
static void sk_tcp_close(Socket s);
-static int sk_tcp_write(Socket s, char *data, int len);
-static int sk_tcp_write_oob(Socket s, char *data, int len);
+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_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 char *sk_tcp_socket_error(Socket s);
+static const char *sk_tcp_socket_error(Socket s);
+
+static struct socket_function_table tcp_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 sk_register(void *sock, Plug plug)
{
- static 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;
/*
* Create Socket structure.
*/
- ret = smalloc(sizeof(struct Socket_tag));
- ret->fn = &fn_table;
+ ret = snew(struct Socket_tag);
+ ret->fn = &tcp_fn_table;
ret->error = NULL;
ret->plug = plug;
bufchain_init(&ret->output_data);
ret->oobinline = 0;
+ uxsel_tell(ret);
add234(sktree, ret);
return (Socket) ret;
Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
int nodelay, Plug plug)
{
- static 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
- };
-
int s;
#ifdef IPV6
struct sockaddr_in6 a6;
int err;
Actual_Socket ret;
short localport;
+ int fl;
/*
* Create Socket structure.
*/
- ret = smalloc(sizeof(struct Socket_tag));
- ret->fn = &fn_table;
+ ret = snew(struct Socket_tag);
+ ret->fn = &tcp_fn_table;
ret->error = NULL;
ret->plug = plug;
bufchain_init(&ret->output_data);
#ifdef IPV6
if (addr->family == AF_INET6) {
- memset(&a6, 0, sizeof(a6));
+ /* XXX use getaddrinfo to get a local address? */
a6.sin6_family = AF_INET6;
-/*a6.sin6_addr = in6addr_any; *//* == 0 */
+ a6.sin6_addr = in6addr_any;
a6.sin6_port = htons(localport);
+ retcode = bind(s, (struct sockaddr *) &a6, sizeof(a6));
} else
#endif
{
+ assert(addr->family == AF_INET);
a.sin_family = AF_INET;
a.sin_addr.s_addr = htonl(INADDR_ANY);
a.sin_port = htons(localport);
+ retcode = bind(s, (struct sockaddr *) &a, sizeof(a));
}
-#ifdef IPV6
- retcode = bind(s, (addr->family == AF_INET6 ?
- (struct sockaddr *) &a6 :
- (struct sockaddr *) &a),
- (addr->family ==
- AF_INET6 ? sizeof(a6) : sizeof(a)));
-#else
- retcode = bind(s, (struct sockaddr *) &a, sizeof(a));
-#endif
if (retcode >= 0) {
err = 0;
break; /* done */
* Connect to remote address.
*/
#ifdef IPV6
- if (addr->family == AF_INET6) {
- memset(&a, 0, sizeof(a));
- a6.sin6_family = AF_INET6;
- a6.sin6_port = htons((short) port);
- a6.sin6_addr =
- ((struct sockaddr_in6 *) addr->ai->ai_addr)->sin6_addr;
- } else
-#endif
- {
- a.sin_family = AF_INET;
- a.sin_addr.s_addr = htonl(addr->address);
- a.sin_port = htons((short) port);
+ /* XXX would be better to have got getaddrinfo() to fill in the port. */
+ if (addr->family == AF_INET)
+ ((struct sockaddr_in *)addr->ai->ai_addr)->sin_port =
+ htons(port);
+ else {
+ assert(addr->family == AF_INET6);
+ ((struct sockaddr_in *)addr->ai->ai_addr)->sin_port =
+ htons(port);
}
+#else
+ a.sin_family = AF_INET;
+ a.sin_addr.s_addr = htonl(addr->address);
+ a.sin_port = htons((short) port);
+#endif
+
+ fl = fcntl(s, F_GETFL);
+ if (fl != -1)
+ fcntl(s, F_SETFL, fl | O_NONBLOCK);
if ((
#ifdef IPV6
- connect(s, ((addr->family == AF_INET6) ?
- (struct sockaddr *) &a6 : (struct sockaddr *) &a),
- (addr->family == AF_INET6) ? sizeof(a6) : sizeof(a))
+ connect(s, addr->ai->ai_addr, addr->ai->ai_addrlen)
#else
connect(s, (struct sockaddr *) &a, sizeof(a))
#endif
) < 0) {
- /*
- * FIXME: We are prepared to receive EWOULDBLOCK here,
- * because we might want the connection to be made
- * asynchronously; but how do we actually arrange this in
- * Unix? I forget.
- */
- if ( errno != EWOULDBLOCK ) {
+ if ( errno != EINPROGRESS ) {
ret->error = error_string(errno);
return (Socket) ret;
}
ret->writable = 1;
}
+ uxsel_tell(ret);
add234(sktree, ret);
return (Socket) ret;
Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only)
{
- static 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
- };
-
int s;
#ifdef IPV6
+#if 0
struct sockaddr_in6 a6;
#endif
+ struct addrinfo hints, *ai;
+ char portstr[6];
+#endif
struct sockaddr_in a;
int err;
Actual_Socket ret;
/*
* Create Socket structure.
*/
- ret = smalloc(sizeof(struct Socket_tag));
- ret->fn = &fn_table;
+ ret = snew(struct Socket_tag);
+ ret->fn = &tcp_fn_table;
ret->error = NULL;
ret->plug = plug;
bufchain_init(&ret->output_data);
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on));
#ifdef IPV6
- if (addr->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. :-) */
+ hints.ai_flags = AI_NUMERICHOST;
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = 0;
+ hints.ai_protocol = 0;
+ hints.ai_addrlen = 0;
+ hints.ai_addr = NULL;
+ hints.ai_canonname = NULL;
+ hints.ai_next = NULL;
+ sprintf(portstr, "%d", port);
+ if (srcaddr != NULL && getaddrinfo(srcaddr, portstr, &hints, &ai) == 0)
+ retcode = bind(s, ai->ai_addr, ai->ai_addrlen);
+ else
+#if 0
+ {
+ /*
+ * FIXME: Need two listening sockets, in principle, one for v4
+ * and one for v6
+ */
if (local_host_only)
a6.sin6_addr = in6addr_loopback;
else
a6.sin6_port = htons(port);
} else
#endif
+#endif
{
int got_addr = 0;
a.sin_family = AF_INET;
}
a.sin_port = htons((short)port);
+ retcode = bind(s, (struct sockaddr *) &a, sizeof(a));
}
-#ifdef IPV6
- retcode = bind(s, (addr->family == AF_INET6 ?
- (struct sockaddr *) &a6 :
- (struct sockaddr *) &a),
- (addr->family ==
- AF_INET6 ? sizeof(a6) : sizeof(a)));
-#else
- retcode = bind(s, (struct sockaddr *) &a, sizeof(a));
-#endif
+
if (retcode >= 0) {
err = 0;
} else {
return (Socket) ret;
}
+ uxsel_tell(ret);
add234(sktree, ret);
return (Socket) ret;
{
Actual_Socket s = (Actual_Socket) sock;
+ uxsel_del(s->s);
del234(sktree, s);
close(s->s);
sfree(s);
}
+int sk_getxdmdata(void *sock, unsigned long *ip, int *port)
+{
+ Actual_Socket s = (Actual_Socket) sock;
+ struct sockaddr_in addr;
+ socklen_t addrlen;
+
+ /*
+ * We must check that this socket really _is_ an Actual_Socket.
+ */
+ if (s->fn != &tcp_fn_table)
+ return 0; /* failure */
+
+ /*
+ * If we ever implement connecting to a local X server through
+ * a Unix socket, we return 0xFFFFFFFF for the IP address and
+ * our current pid for the port. Bizarre, but such is life.
+ */
+
+ addrlen = sizeof(addr);
+ if (getsockname(s->s, (struct sockaddr *)&addr, &addrlen) < 0 ||
+ addr.sin_family != AF_INET)
+ return 0;
+
+ *ip = ntohl(addr.sin_addr.s_addr);
+ *port = ntohs(addr.sin_port);
+
+ return 1;
+}
+
/*
* The function which tries to send on a socket once it's deemed
* writable.
}
}
}
+ uxsel_tell(s);
}
-static int sk_tcp_write(Socket sock, char *buf, int len)
+static int sk_tcp_write(Socket sock, const char *buf, int len)
{
Actual_Socket s = (Actual_Socket) sock;
if (s->writable)
try_send(s);
+ /*
+ * Update the select() status to correctly reflect whether or
+ * not we should be selecting for write.
+ */
+ uxsel_tell(s);
+
return bufchain_size(&s->output_data);
}
-static int sk_tcp_write_oob(Socket sock, char *buf, int len)
+static int sk_tcp_write_oob(Socket sock, const char *buf, int len)
{
Actual_Socket s = (Actual_Socket) sock;
if (s->writable)
try_send(s);
+ /*
+ * Update the select() status to correctly reflect whether or
+ * not we should be selecting for write.
+ */
+ uxsel_tell(s);
+
return s->sending_oob;
}
-int select_result(int fd, int event)
+static int net_select_result(int fd, int event)
{
int ret;
int err;
noise_ultralight(event);
switch (event) {
-#ifdef FIXME_NONBLOCKING_CONNECTIONS
- case FIXME: /* connected */
- s->connected = s->writable = 1;
- break;
-#endif
case 4: /* exceptional */
if (!s->oobinline) {
/*
ret = recv(s->s, buf, sizeof(buf), MSG_OOB);
noise_ultralight(ret);
if (ret <= 0) {
- char *str = (ret == 0 ? "Internal networking trouble" :
- error_string(errno));
+ const char *str = (ret == 0 ? "Internal networking trouble" :
+ error_string(errno));
/* We're inside the Unix frontend here, so we know
* that the frontend handle is unnecessary. */
logevent(NULL, str);
}
break;
case 2: /* writable */
- {
+ if (!s->connected) {
+ /*
+ * select() reports a socket as _writable_ when an
+ * asynchronous connection is completed.
+ */
+ s->connected = s->writable = 1;
+ uxsel_tell(s);
+ break;
+ } else {
int bufsize_before, bufsize_after;
s->writable = 1;
bufsize_before = s->sending_oob + bufchain_size(&s->output_data);
* if there's a problem. These functions extract an error message,
* or return NULL if there's no problem.
*/
-char *sk_addr_error(SockAddr addr)
+const char *sk_addr_error(SockAddr addr)
{
return addr->error;
}
-static char *sk_tcp_socket_error(Socket sock)
+static const char *sk_tcp_socket_error(Socket sock)
{
Actual_Socket s = (Actual_Socket) sock;
return s->error;
recv(s->s, &c, 1, MSG_PEEK);
}
s->frozen_readable = 0;
+ uxsel_tell(s);
}
-/*
- * For Unix select()-based frontends: enumerate all sockets
- * currently active, and state whether we currently wish to receive
- * select events on them for reading, writing and exceptional
- * status.
- */
-static void set_rwx(Actual_Socket s, int *rwx)
+static void uxsel_tell(Actual_Socket s)
{
- int val = 0;
+ int rwx = 0;
+ if (!s->connected)
+ rwx |= 2; /* write == connect */
if (s->connected && !s->frozen)
- val |= 1 | 4; /* read, except */
+ rwx |= 1 | 4; /* read, except */
if (bufchain_size(&s->output_data))
- val |= 2; /* write */
+ rwx |= 2; /* write */
if (s->listener)
- val |= 1; /* read == accept */
- *rwx = val;
-}
-
-int first_socket(int *state, int *rwx)
-{
- Actual_Socket s;
- *state = 0;
- s = index234(sktree, (*state)++);
- if (s)
- set_rwx(s, rwx);
- return s ? s->s : -1;
-}
-
-int next_socket(int *state, int *rwx)
-{
- Actual_Socket s = index234(sktree, (*state)++);
- if (s)
- set_rwx(s, rwx);
- return s ? s->s : -1;
+ rwx |= 1; /* read == accept */
+ uxsel_set(s->s, rwx, net_select_result);
}
int net_service_lookup(char *service)
projects / u / mdw / putty / blobdiff