#include "network.h"
#include "tree234.h"
+/* Solaris needs <sys/sockio.h> for SIOCATMARK. */
+#ifndef SIOCATMARK
+#include <sys/sockio.h>
+#endif
+
#ifndef X11_UNIX_PATH
# define X11_UNIX_PATH "/tmp/.X11-unix/X"
#endif
-#define ipv4_is_loopback(addr) (inet_netof(addr) == IN_LOOPBACKNET)
+/*
+ * Access to sockaddr types without breaking C strict aliasing rules.
+ */
+union sockaddr_union {
+#ifdef NO_IPV6
+ struct sockaddr_in storage;
+#else
+ struct sockaddr_storage storage;
+ struct sockaddr_in6 sin6;
+#endif
+ struct sockaddr sa;
+ struct sockaddr_in sin;
+ struct sockaddr_un su;
+};
+
+/*
+ * We used to typedef struct Socket_tag *Socket.
+ *
+ * Since we have made the networking abstraction slightly more
+ * abstract, Socket no longer means a tcp socket (it could mean
+ * an ssl socket). So now we must use Actual_Socket when we know
+ * we are talking about a tcp socket.
+ */
+typedef struct Socket_tag *Actual_Socket;
+
+/*
+ * Mutable state that goes with a SockAddr: stores information
+ * about where in the list of candidate IP(v*) addresses we've
+ * currently got to.
+ */
+typedef struct SockAddrStep_tag SockAddrStep;
+struct SockAddrStep_tag {
+#ifndef NO_IPV6
+ struct addrinfo *ai; /* steps along addr->ais */
+#endif
+ int curraddr;
+};
struct Socket_tag {
struct socket_function_table *fn;
Plug plug;
void *private_ptr;
bufchain output_data;
- int connected;
+ int connected; /* irrelevant for listening sockets */
int writable;
int frozen; /* this causes readability notifications to be ignored */
- int frozen_readable; /* this means we missed at least one readability
- * notification while we were frozen */
int localhost_only; /* for listening sockets */
char oobdata[1];
int sending_oob;
int oobpending; /* is there OOB data available to read? */
int oobinline;
+ enum { EOF_NO, EOF_PENDING, EOF_SENT } outgoingeof;
+ int incomingeof;
int pending_error; /* in case send() returns error */
int listener;
int nodelay, keepalive; /* for connect()-type sockets */
int privport, port; /* and again */
SockAddr addr;
+ SockAddrStep step;
+ /*
+ * We sometimes need pairs of Socket structures to be linked:
+ * if we are listening on the same IPv6 and v4 port, for
+ * example. So here we define `parent' and `child' pointers to
+ * track this link.
+ */
+ Actual_Socket parent, child;
};
-/*
- * We used to typedef struct Socket_tag *Socket.
- *
- * Since we have made the networking abstraction slightly more
- * abstract, Socket no longer means a tcp socket (it could mean
- * an ssl socket). So now we must use Actual_Socket when we know
- * we are talking about a tcp socket.
- */
-typedef struct Socket_tag *Actual_Socket;
-
struct SockAddr_tag {
+ int refcount;
const char *error;
- /*
- * Which address family this address belongs to. AF_INET for
- * IPv4; AF_INET6 for IPv6; AF_UNSPEC indicates that name
- * resolution has not been done and a simple host name is held
- * in this SockAddr structure.
- */
- int family;
+ enum { UNRESOLVED, UNIX, IP } superfamily;
#ifndef NO_IPV6
struct addrinfo *ais; /* Addresses IPv6 style. */
- struct addrinfo *ai; /* steps along the linked list */
#else
unsigned long *addresses; /* Addresses IPv4 style. */
- int naddresses, curraddr;
+ int naddresses;
#endif
char hostname[512]; /* Store an unresolved host name. */
};
+/*
+ * Which address family this address belongs to. AF_INET for IPv4;
+ * AF_INET6 for IPv6; AF_UNSPEC indicates that name resolution has
+ * not been done and a simple host name is held in this SockAddr
+ * structure.
+ */
+#ifndef NO_IPV6
+#define SOCKADDR_FAMILY(addr, step) \
+ ((addr)->superfamily == UNRESOLVED ? AF_UNSPEC : \
+ (addr)->superfamily == UNIX ? AF_UNIX : \
+ (step).ai ? (step).ai->ai_family : AF_INET)
+#else
+#define SOCKADDR_FAMILY(addr, step) \
+ ((addr)->superfamily == UNRESOLVED ? AF_UNSPEC : \
+ (addr)->superfamily == UNIX ? AF_UNIX : AF_INET)
+#endif
+
+/*
+ * Start a SockAddrStep structure to step through multiple
+ * addresses.
+ */
+#ifndef NO_IPV6
+#define START_STEP(addr, step) \
+ ((step).ai = (addr)->ais, (step).curraddr = 0)
+#else
+#define START_STEP(addr, step) \
+ ((step).curraddr = 0)
+#endif
+
static tree234 *sktree;
static void uxsel_tell(Actual_Socket s);
return -1;
if (as > bs)
return +1;
+ if (a < b)
+ return -1;
+ if (a > b)
+ return +1;
return 0;
}
/* Clear the structure and default to IPv4. */
memset(ret, 0, sizeof(struct SockAddr_tag));
- ret->family = 0; /* We set this one when we have resolved the host. */
+ ret->superfamily = UNRESOLVED;
*realhost = '\0';
ret->error = NULL;
+ ret->refcount = 1;
#ifndef NO_IPV6
hints.ai_flags = AI_CANONNAME;
hints.ai_canonname = NULL;
hints.ai_next = NULL;
err = getaddrinfo(host, NULL, &hints, &ret->ais);
- ret->ai = ret->ais;
if (err != 0) {
ret->error = gai_strerror(err);
return ret;
}
- ret->family = ret->ai->ai_family;
+ ret->superfamily = IP;
*realhost = '\0';
- if (ret->ai->ai_canonname != NULL)
- strncat(realhost, ret->ai->ai_canonname, sizeof(realhost) - 1);
+ if (ret->ais->ai_canonname != NULL)
+ strncat(realhost, ret->ais->ai_canonname, sizeof(realhost) - 1);
else
strncat(realhost, host, sizeof(realhost) - 1);
#else
* Otherwise use the IPv4-only gethostbyname... (NOTE:
* we don't use gethostbyname as a fallback!)
*/
- if (ret->family == 0) {
+ if (ret->superfamily == UNRESOLVED) {
/*debug(("Resolving \"%s\" with gethostbyname() (IPv4 only)...\n", host)); */
if ( (h = gethostbyname(host)) )
- ret->family = AF_INET;
+ ret->superfamily = IP;
}
- if (ret->family == 0) {
+ if (ret->superfamily == UNRESOLVED) {
ret->error = (h_errno == HOST_NOT_FOUND ||
h_errno == NO_DATA ||
h_errno == NO_ADDRESS ? "Host does not exist" :
* This must be a numeric IPv4 address because it caused a
* success return from inet_addr.
*/
- ret->family = AF_INET;
+ ret->superfamily = IP;
strncpy(realhost, host, sizeof(realhost));
ret->addresses = snew(unsigned long);
ret->naddresses = 1;
ret->addresses[0] = ntohl(a);
- ret->curraddr = 0;
}
#endif
realhost[lenof(realhost)-1] = '\0';
{
SockAddr ret = snew(struct SockAddr_tag);
ret->error = NULL;
- ret->family = AF_UNSPEC;
+ ret->superfamily = UNRESOLVED;
strncpy(ret->hostname, host, lenof(ret->hostname));
ret->hostname[lenof(ret->hostname)-1] = '\0';
#ifndef NO_IPV6
#else
ret->addresses = NULL;
#endif
+ ret->refcount = 1;
return ret;
}
-static int sk_nextaddr(SockAddr addr)
+static int sk_nextaddr(SockAddr addr, SockAddrStep *step)
{
#ifndef NO_IPV6
- if (addr->ai->ai_next) {
- addr->ai = addr->ai->ai_next;
- addr->family = addr->ai->ai_family;
+ if (step->ai && step->ai->ai_next) {
+ step->ai = step->ai->ai_next;
return TRUE;
} else
return FALSE;
#else
- if (addr->curraddr+1 < addr->naddresses) {
- addr->curraddr++;
+ if (step->curraddr+1 < addr->naddresses) {
+ step->curraddr++;
return TRUE;
} else {
return FALSE;
void sk_getaddr(SockAddr addr, char *buf, int buflen)
{
-
- if (addr->family == AF_UNSPEC) {
+ /* XXX not clear what we should return for Unix-domain sockets; let's
+ * hope the question never arises */
+ assert(addr->superfamily != UNIX);
+ if (addr->superfamily == UNRESOLVED) {
strncpy(buf, addr->hostname, buflen);
buf[buflen-1] = '\0';
} else {
#ifndef NO_IPV6
- if (getnameinfo(addr->ai->ai_addr, addr->ai->ai_addrlen, buf, buflen,
+ if (getnameinfo(addr->ais->ai_addr, addr->ais->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->addresses[addr->curraddr]);
+ SockAddrStep step;
+ START_STEP(addr, step);
+ assert(SOCKADDR_FAMILY(addr, step) == AF_INET);
+ a.s_addr = htonl(addr->addresses[0]);
strncpy(buf, inet_ntoa(a), buflen);
buf[buflen-1] = '\0';
#endif
int sk_hostname_is_local(char *name)
{
- return !strcmp(name, "localhost");
+ return !strcmp(name, "localhost") ||
+ !strcmp(name, "::1") ||
+ !strncmp(name, "127.", 4);
}
-int sk_address_is_local(SockAddr addr)
+#define ipv4_is_loopback(addr) \
+ (((addr).s_addr & htonl(0xff000000)) == htonl(0x7f000000))
+
+static int sockaddr_is_loopback(struct sockaddr *sa)
{
+ union sockaddr_union *u = (union sockaddr_union *)sa;
+ switch (u->sa.sa_family) {
+ case AF_INET:
+ return ipv4_is_loopback(u->sin.sin_addr);
+#ifndef NO_IPV6
+ case AF_INET6:
+ return IN6_IS_ADDR_LOOPBACK(&u->sin6.sin6_addr);
+#endif
+ case AF_UNIX:
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
- if (addr->family == AF_UNSPEC)
+int sk_address_is_local(SockAddr addr)
+{
+ if (addr->superfamily == UNRESOLVED)
return 0; /* we don't know; assume not */
+ else if (addr->superfamily == UNIX)
+ return 1;
else {
#ifndef NO_IPV6
- 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;
+ return sockaddr_is_loopback(addr->ais->ai_addr);
#else
struct in_addr a;
- assert(addr->family == AF_INET);
- a.s_addr = htonl(addr->addresses[addr->curraddr]);
+ SockAddrStep step;
+ START_STEP(addr, step);
+ assert(SOCKADDR_FAMILY(addr, step) == AF_INET);
+ a.s_addr = htonl(addr->addresses[0]);
return ipv4_is_loopback(a);
#endif
}
}
+int sk_address_is_special_local(SockAddr addr)
+{
+ return addr->superfamily == UNIX;
+}
+
int sk_addrtype(SockAddr addr)
{
- return (addr->family == AF_INET ? ADDRTYPE_IPV4 :
+ SockAddrStep step;
+ int family;
+ START_STEP(addr, step);
+ family = SOCKADDR_FAMILY(addr, step);
+
+ return (family == AF_INET ? ADDRTYPE_IPV4 :
#ifndef NO_IPV6
- addr->family == AF_INET6 ? ADDRTYPE_IPV6 :
+ family == AF_INET6 ? ADDRTYPE_IPV6 :
#endif
ADDRTYPE_NAME);
}
void sk_addrcopy(SockAddr addr, char *buf)
{
+ SockAddrStep step;
+ int family;
+ START_STEP(addr, step);
+ family = SOCKADDR_FAMILY(addr, step);
#ifndef NO_IPV6
- if (addr->family == AF_INET)
- memcpy(buf, &((struct sockaddr_in *)addr->ai->ai_addr)->sin_addr,
+ if (family == AF_INET)
+ memcpy(buf, &((struct sockaddr_in *)step.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,
+ else if (family == AF_INET6)
+ memcpy(buf, &((struct sockaddr_in6 *)step.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->addresses[addr->curraddr]);
+ assert(family == AF_INET);
+ a.s_addr = htonl(addr->addresses[step.curraddr]);
memcpy(buf, (char*) &a.s_addr, 4);
#endif
}
void sk_addr_free(SockAddr addr)
{
-
+ if (--addr->refcount > 0)
+ return;
#ifndef NO_IPV6
if (addr->ais != NULL)
freeaddrinfo(addr->ais);
sfree(addr);
}
+SockAddr sk_addr_dup(SockAddr addr)
+{
+ addr->refcount++;
+ return addr;
+}
+
static Plug sk_tcp_plug(Socket sock, Plug p)
{
Actual_Socket s = (Actual_Socket) sock;
static void sk_tcp_close(Socket s);
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);
sk_tcp_close,
sk_tcp_write,
sk_tcp_write_oob,
+ sk_tcp_write_eof,
sk_tcp_flush,
sk_tcp_set_private_ptr,
sk_tcp_get_private_ptr,
ret->writable = 1; /* to start with */
ret->sending_oob = 0;
ret->frozen = 1;
- ret->frozen_readable = 0;
ret->localhost_only = 0; /* unused, but best init anyway */
ret->pending_error = 0;
ret->oobpending = FALSE;
+ ret->outgoingeof = EOF_NO;
+ ret->incomingeof = FALSE;
ret->listener = 0;
+ ret->parent = ret->child = NULL;
ret->addr = NULL;
+ ret->connected = 1;
ret->s = sockfd;
static int try_connect(Actual_Socket sock)
{
int s;
-#ifndef NO_IPV6
- struct sockaddr_in6 a6;
-#endif
- struct sockaddr_in a;
- struct sockaddr_un au;
- const struct sockaddr *sa;
+ union sockaddr_union u;
+ const union sockaddr_union *sa;
int err = 0;
short localport;
- int fl, salen;
+ int salen, family;
+
+ /*
+ * Remove the socket from the tree before we overwrite its
+ * internal socket id, because that forms part of the tree's
+ * sorting criterion. We'll add it back before exiting this
+ * function, whether we changed anything or not.
+ */
+ del234(sktree, sock);
if (sock->s >= 0)
close(sock->s);
/*
* Open socket.
*/
- assert(sock->addr->family != AF_UNSPEC);
- s = socket(sock->addr->family, SOCK_STREAM, 0);
+ family = SOCKADDR_FAMILY(sock->addr, sock->step);
+ assert(family != AF_UNSPEC);
+ s = socket(family, SOCK_STREAM, 0);
sock->s = s;
if (s < 0) {
goto ret;
}
+ cloexec(s);
+
if (sock->oobinline) {
int b = TRUE;
- setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b));
+ if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
+ (void *) &b, sizeof(b)) < 0) {
+ err = errno;
+ close(s);
+ goto ret;
+ }
}
if (sock->nodelay) {
int b = TRUE;
- setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b));
+ if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY,
+ (void *) &b, sizeof(b)) < 0) {
+ err = errno;
+ close(s);
+ goto ret;
+ }
}
if (sock->keepalive) {
int b = TRUE;
- setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b));
+ if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
+ (void *) &b, sizeof(b)) < 0) {
+ err = errno;
+ close(s);
+ goto ret;
+ }
}
/*
localport = 0; /* just use port 0 (ie kernel picks) */
/* BSD IP stacks need sockaddr_in zeroed before filling in */
- memset(&a,'\0',sizeof(struct sockaddr_in));
-#ifndef NO_IPV6
- memset(&a6,'\0',sizeof(struct sockaddr_in6));
-#endif
+ memset(&u,'\0',sizeof(u));
/* We don't try to bind to a local address for UNIX domain sockets. (Why
* do we bother doing the bind when localport == 0 anyway?) */
- if(sock->addr->family != AF_UNIX) {
+ if (family != AF_UNIX) {
/* Loop round trying to bind */
while (1) {
int retcode;
#ifndef NO_IPV6
- if (sock->addr->family == AF_INET6) {
+ if (family == AF_INET6) {
/* XXX use getaddrinfo to get a local address? */
- a6.sin6_family = AF_INET6;
- a6.sin6_addr = in6addr_any;
- a6.sin6_port = htons(localport);
- retcode = bind(s, (struct sockaddr *) &a6, sizeof(a6));
+ u.sin6.sin6_family = AF_INET6;
+ u.sin6.sin6_addr = in6addr_any;
+ u.sin6.sin6_port = htons(localport);
+ retcode = bind(s, &u.sa, sizeof(u.sin6));
} else
#endif
{
- assert(sock->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));
+ assert(family == AF_INET);
+ u.sin.sin_family = AF_INET;
+ u.sin.sin_addr.s_addr = htonl(INADDR_ANY);
+ u.sin.sin_port = htons(localport);
+ retcode = bind(s, &u.sa, sizeof(u.sin));
}
if (retcode >= 0) {
err = 0;
/*
* Connect to remote address.
*/
- switch(sock->addr->family) {
+ switch(family) {
#ifndef NO_IPV6
case AF_INET:
/* XXX would be better to have got getaddrinfo() to fill in the port. */
- ((struct sockaddr_in *)sock->addr->ai->ai_addr)->sin_port =
+ ((struct sockaddr_in *)sock->step.ai->ai_addr)->sin_port =
htons(sock->port);
- sa = (const struct sockaddr *)sock->addr->ai->ai_addr;
- salen = sock->addr->ai->ai_addrlen;
+ sa = (const union sockaddr_union *)sock->step.ai->ai_addr;
+ salen = sock->step.ai->ai_addrlen;
break;
case AF_INET6:
- ((struct sockaddr_in *)sock->addr->ai->ai_addr)->sin_port =
+ ((struct sockaddr_in *)sock->step.ai->ai_addr)->sin_port =
htons(sock->port);
- sa = (const struct sockaddr *)sock->addr->ai->ai_addr;
- salen = sock->addr->ai->ai_addrlen;
+ sa = (const union sockaddr_union *)sock->step.ai->ai_addr;
+ salen = sock->step.ai->ai_addrlen;
break;
#else
case AF_INET:
- a.sin_family = AF_INET;
- a.sin_addr.s_addr = htonl(sock->addr->addresses[sock->addr->curraddr]);
- a.sin_port = htons((short) sock->port);
- sa = (const struct sockaddr *)&a;
- salen = sizeof a;
+ u.sin.sin_family = AF_INET;
+ u.sin.sin_addr.s_addr = htonl(sock->addr->addresses[sock->step.curraddr]);
+ u.sin.sin_port = htons((short) sock->port);
+ sa = &u;
+ salen = sizeof u.sin;
break;
#endif
case AF_UNIX:
assert(sock->port == 0); /* to catch confused people */
- assert(strlen(sock->addr->hostname) < sizeof au.sun_path);
- memset(&au, 0, sizeof au);
- au.sun_family = AF_UNIX;
- strcpy(au.sun_path, sock->addr->hostname);
- sa = (const struct sockaddr *)&au;
- salen = sizeof au;
+ assert(strlen(sock->addr->hostname) < sizeof u.su.sun_path);
+ u.su.sun_family = AF_UNIX;
+ strcpy(u.su.sun_path, sock->addr->hostname);
+ sa = &u;
+ salen = sizeof u.su;
break;
default:
assert(0 && "unknown address family");
+ exit(1); /* XXX: GCC doesn't understand assert() on some systems. */
}
- fl = fcntl(s, F_GETFL);
- if (fl != -1)
- fcntl(s, F_SETFL, fl | O_NONBLOCK);
+ nonblock(s);
- if ((connect(s, sa, salen)) < 0) {
+ if ((connect(s, &(sa->sa), salen)) < 0) {
if ( errno != EINPROGRESS ) {
err = errno;
goto ret;
}
uxsel_tell(sock);
- add234(sktree, sock);
ret:
+
+ /*
+ * No matter what happened, put the socket back in the tree.
+ */
+ add234(sktree, sock);
+
if (err)
plug_log(sock->plug, 1, sock->addr, sock->port, strerror(err), err);
return err;
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->oobpending = FALSE;
+ ret->outgoingeof = EOF_NO;
+ ret->incomingeof = FALSE;
ret->listener = 0;
ret->addr = addr;
+ START_STEP(ret->addr, ret->step);
ret->s = -1;
ret->oobinline = oobinline;
ret->nodelay = nodelay;
err = 0;
do {
err = try_connect(ret);
- } while (err && sk_nextaddr(ret->addr));
+ } while (err && sk_nextaddr(ret->addr, &ret->step));
if (err)
ret->error = strerror(err);
return (Socket) ret;
}
-Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, int address_family)
+Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, int orig_address_family)
{
int s;
#ifndef NO_IPV6
struct addrinfo hints, *ai;
char portstr[6];
- struct sockaddr_in6 a6;
#endif
- struct sockaddr *addr;
+ union sockaddr_union u;
+ union sockaddr_union *addr;
int addrlen;
- struct sockaddr_in a;
Actual_Socket ret;
int retcode;
+ int address_family;
int on = 1;
/*
ret->writable = 0; /* to start with */
ret->sending_oob = 0;
ret->frozen = 0;
- ret->frozen_readable = 0;
ret->localhost_only = local_host_only;
ret->pending_error = 0;
+ ret->parent = ret->child = NULL;
ret->oobpending = FALSE;
+ ret->outgoingeof = EOF_NO;
+ ret->incomingeof = FALSE;
ret->listener = 1;
ret->addr = NULL;
* Translate address_family from platform-independent constants
* into local reality.
*/
- address_family = (address_family == ADDRTYPE_IPV4 ? AF_INET :
- address_family == ADDRTYPE_IPV6 ? AF_INET6 : AF_UNSPEC);
+ address_family = (orig_address_family == ADDRTYPE_IPV4 ? AF_INET :
+#ifndef NO_IPV6
+ orig_address_family == ADDRTYPE_IPV6 ? AF_INET6 :
+#endif
+ AF_UNSPEC);
#ifndef NO_IPV6
/* Let's default to IPv6.
*/
s = socket(address_family, SOCK_STREAM, 0);
+#ifndef NO_IPV6
/* If the host doesn't support IPv6 try fallback to IPv4. */
if (s < 0 && address_family == AF_INET6) {
address_family = AF_INET;
s = socket(address_family, SOCK_STREAM, 0);
}
+#endif
if (s < 0) {
ret->error = strerror(errno);
return (Socket) ret;
}
+ cloexec(s);
+
ret->oobinline = 0;
- setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on));
+ if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
+ (const char *)&on, sizeof(on)) < 0) {
+ ret->error = strerror(errno);
+ close(s);
+ return (Socket) ret;
+ }
retcode = -1;
addr = NULL; addrlen = -1; /* placate optimiser */
#ifndef NO_IPV6
hints.ai_flags = AI_NUMERICHOST;
hints.ai_family = address_family;
- hints.ai_socktype = 0;
+ hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
hints.ai_addrlen = 0;
hints.ai_addr = NULL;
hints.ai_canonname = NULL;
hints.ai_next = NULL;
+ assert(port >= 0 && port <= 99999);
sprintf(portstr, "%d", port);
retcode = getaddrinfo(srcaddr, portstr, &hints, &ai);
if (retcode == 0) {
- addr = ai->ai_addr;
+ addr = (union sockaddr_union *)ai->ai_addr;
addrlen = ai->ai_addrlen;
}
#else
- memset(&a,'\0',sizeof(struct sockaddr_in));
- a.sin_family = AF_INET;
- a.sin_port = htons(port);
- a.sin_addr.s_addr = inet_addr(srcaddr);
- if (a.sin_addr.s_addr != (in_addr_t)(-1)) {
+ memset(&u,'\0',sizeof u);
+ u.sin.sin_family = AF_INET;
+ u.sin.sin_port = htons(port);
+ u.sin.sin_addr.s_addr = inet_addr(srcaddr);
+ if (u.sin.sin_addr.s_addr != (in_addr_t)(-1)) {
/* Override localhost_only with specified listen addr. */
- ret->localhost_only = ipv4_is_loopback(a.sin_addr);
- got_addr = 1;
+ ret->localhost_only = ipv4_is_loopback(u.sin.sin_addr);
}
- addr = (struct sockaddr *)a;
- addrlen = sizeof(a);
+ addr = &u;
+ addrlen = sizeof(u.sin);
retcode = 0;
#endif
}
if (retcode != 0) {
+ memset(&u,'\0',sizeof u);
#ifndef NO_IPV6
if (address_family == AF_INET6) {
- memset(&a6,'\0',sizeof(struct sockaddr_in6));
- a6.sin6_family = AF_INET6;
- a6.sin6_port = htons(port);
+ u.sin6.sin6_family = AF_INET6;
+ u.sin6.sin6_port = htons(port);
if (local_host_only)
- a6.sin6_addr = in6addr_loopback;
+ u.sin6.sin6_addr = in6addr_loopback;
else
- a6.sin6_addr = in6addr_any;
- addr = (struct sockaddr *)&a6;
- addrlen = sizeof(a6);
+ u.sin6.sin6_addr = in6addr_any;
+ addr = &u;
+ addrlen = sizeof(u.sin6);
} else
#endif
{
- memset(&a,'\0',sizeof(struct sockaddr_in));
- a.sin_family = AF_INET;
- a.sin_port = htons(port);
+ u.sin.sin_family = AF_INET;
+ u.sin.sin_port = htons(port);
if (local_host_only)
- a.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ u.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
else
- a.sin_addr.s_addr = htonl(INADDR_ANY);
- addr = (struct sockaddr *)&a;
- addrlen = sizeof(a);
+ u.sin.sin_addr.s_addr = htonl(INADDR_ANY);
+ addr = &u;
+ addrlen = sizeof(u.sin);
}
}
- retcode = bind(s, addr, addrlen);
+ retcode = bind(s, &addr->sa, addrlen);
if (retcode < 0) {
close(s);
ret->error = strerror(errno);
return (Socket) ret;
}
+#ifndef NO_IPV6
+ /*
+ * If we were given ADDRTYPE_UNSPEC, we must also create an
+ * IPv4 listening socket and link it to this one.
+ */
+ if (address_family == AF_INET6 && orig_address_family == ADDRTYPE_UNSPEC) {
+ Actual_Socket other;
+
+ other = (Actual_Socket) sk_newlistener(srcaddr, port, plug,
+ local_host_only, ADDRTYPE_IPV4);
+
+ if (other) {
+ if (!other->error) {
+ other->parent = ret;
+ ret->child = other;
+ } else {
+ /* If we couldn't create a listening socket on IPv4 as well
+ * as IPv6, we must return an error overall. */
+ close(s);
+ sfree(ret);
+ return (Socket) other;
+ }
+ }
+ }
+#endif
+
ret->s = s;
uxsel_tell(ret);
{
Actual_Socket s = (Actual_Socket) sock;
+ if (s->child)
+ sk_tcp_close((Socket)s->child);
+
uxsel_del(s->s);
del234(sktree, s);
close(s->s);
sfree(s);
}
-int sk_getxdmdata(void *sock, unsigned long *ip, int *port)
+void *sk_getxdmdata(void *sock, int *lenp)
{
Actual_Socket s = (Actual_Socket) sock;
- struct sockaddr_in addr;
+ union sockaddr_union u;
socklen_t addrlen;
+ char *buf;
+ static unsigned int unix_addr = 0xFFFFFFFF;
/*
* We must check that this socket really _is_ an Actual_Socket.
*/
if (s->fn != &tcp_fn_table)
- return 0; /* failure */
+ return NULL; /* failure */
- addrlen = sizeof(addr);
- if (getsockname(s->s, (struct sockaddr *)&addr, &addrlen) < 0)
- return 0;
- switch(addr.sin_family) {
+ addrlen = sizeof(u);
+ if (getsockname(s->s, &u.sa, &addrlen) < 0)
+ return NULL;
+ switch(u.sa.sa_family) {
case AF_INET:
- *ip = ntohl(addr.sin_addr.s_addr);
- *port = ntohs(addr.sin_port);
+ *lenp = 6;
+ buf = snewn(*lenp, char);
+ PUT_32BIT_MSB_FIRST(buf, ntohl(u.sin.sin_addr.s_addr));
+ PUT_16BIT_MSB_FIRST(buf+4, ntohs(u.sin.sin_port));
+ break;
+#ifndef NO_IPV6
+ case AF_INET6:
+ *lenp = 6;
+ buf = snewn(*lenp, char);
+ if (IN6_IS_ADDR_V4MAPPED(&u.sin6.sin6_addr)) {
+ memcpy(buf, u.sin6.sin6_addr.s6_addr + 12, 4);
+ PUT_16BIT_MSB_FIRST(buf+4, ntohs(u.sin6.sin6_port));
+ } else
+ /* This is stupid, but it's what XLib does. */
+ memset(buf, 0, 6);
break;
+#endif
case AF_UNIX:
- /*
- * For a Unix socket, we return 0xFFFFFFFF for the IP address and
- * our current pid for the port. Bizarre, but such is life.
- */
- *ip = ntohl(0xFFFFFFFF);
- *port = getpid();
+ *lenp = 6;
+ buf = snewn(*lenp, char);
+ PUT_32BIT_MSB_FIRST(buf, unix_addr--);
+ PUT_16BIT_MSB_FIRST(buf+4, getpid());
break;
/* XXX IPV6 */
default:
- return 0;
+ return NULL;
}
- return 1;
+ return buf;
}
/*
*/
s->writable = FALSE;
return;
- } else if (nsent == 0 ||
- err == ECONNABORTED || err == ECONNRESET) {
+ } else {
/*
- * If send() returns CONNABORTED or CONNRESET, we
- * unfortunately can't just call plug_closing(),
+ * We unfortunately can't just call plug_closing(),
* because it's quite likely that we're currently
* _in_ a call from the code we'd be calling back
* to, so we'd have to make half the SSH code
* plug_closing()) at some suitable future moment.
*/
s->pending_error = err;
+ /*
+ * Immediately cease selecting on this socket, so that
+ * we don't tight-loop repeatedly trying to do
+ * whatever it was that went wrong.
+ */
+ uxsel_tell(s);
+ /*
+ * Notify the front end that it might want to call us.
+ */
+ frontend_net_error_pending();
return;
- } else {
- /* We're inside the Unix frontend here, so we know
- * that the frontend handle is unnecessary. */
- logevent(NULL, strerror(err));
- fatalbox("%s", strerror(err));
}
} else {
if (s->sending_oob) {
}
}
}
+
+ /*
+ * If we reach here, we've finished sending everything we might
+ * have needed to send. Send EOF, if we need to.
+ */
+ if (s->outgoingeof == EOF_PENDING) {
+ shutdown(s->s, SHUT_WR);
+ s->outgoingeof = EOF_SENT;
+ }
+
+ /*
+ * Also update the select status, because we don't need to select
+ * for writing any more.
+ */
uxsel_tell(s);
}
{
Actual_Socket s = (Actual_Socket) sock;
+ assert(s->outgoingeof == EOF_NO);
+
/*
* Add the data to the buffer list on the socket.
*/
{
Actual_Socket s = (Actual_Socket) sock;
+ assert(s->outgoingeof == EOF_NO);
+
/*
* Replace the buffer list on the socket with the data.
*/
return s->sending_oob;
}
+static void sk_tcp_write_eof(Socket sock)
+{
+ Actual_Socket s = (Actual_Socket) sock;
+
+ assert(s->outgoingeof == EOF_NO);
+
+ /*
+ * Mark the socket as pending outgoing EOF.
+ */
+ s->outgoingeof = EOF_PENDING;
+
+ /*
+ * Now try sending from the start of the buffer list.
+ */
+ 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);
+}
+
static int net_select_result(int fd, int event)
{
int ret;
ret = recv(s->s, buf, sizeof(buf), MSG_OOB);
noise_ultralight(ret);
if (ret <= 0) {
- const char *str = (ret == 0 ? "Internal networking trouble" :
- strerror(errno));
- /* We're inside the Unix frontend here, so we know
- * that the frontend handle is unnecessary. */
- logevent(NULL, str);
- fatalbox("%s", str);
+ return plug_closing(s->plug,
+ ret == 0 ? "Internal networking trouble" :
+ strerror(errno), errno, 0);
} else {
/*
* Receiving actual data on a socket means we can
* On a listening socket, the readability event means a
* connection is ready to be accepted.
*/
- struct sockaddr_in isa;
- int addrlen = sizeof(struct sockaddr_in);
+ union sockaddr_union su;
+ socklen_t addrlen = sizeof(su);
int t; /* socket of connection */
- memset(&isa, 0, sizeof(struct sockaddr_in));
- t = accept(s->s,(struct sockaddr *)&isa,(socklen_t *) &addrlen);
+ memset(&su, 0, addrlen);
+ t = accept(s->s, &su.sa, &addrlen);
if (t < 0) {
break;
}
- if (s->localhost_only && !ipv4_is_loopback(isa.sin_addr)) {
+ nonblock(t);
+
+ if (s->localhost_only &&
+ !sockaddr_is_loopback(&su.sa)) {
close(t); /* someone let nonlocal through?! */
} else if (plug_accepting(s->plug, t)) {
close(t); /* denied or error */
*/
/* In the case the socket is still frozen, we don't even bother */
- if (s->frozen) {
- s->frozen_readable = 1;
+ if (s->frozen)
break;
- }
/*
* We have received data on the socket. For an oobinline
int err = errno;
if (s->addr) {
plug_log(s->plug, 1, s->addr, s->port, strerror(err), err);
- while (s->addr && sk_nextaddr(s->addr)) {
+ while (s->addr && sk_nextaddr(s->addr, &s->step)) {
err = try_connect(s);
}
}
if (err != 0)
return plug_closing(s->plug, strerror(err), err, 0);
} else if (0 == ret) {
+ s->incomingeof = TRUE; /* stop trying to read now */
+ uxsel_tell(s);
return plug_closing(s->plug, NULL, 0, 0);
} else {
/*
if (s->frozen == is_frozen)
return;
s->frozen = is_frozen;
- if (!is_frozen && s->frozen_readable) {
- char c;
- recv(s->s, &c, 1, MSG_PEEK);
- }
- s->frozen_readable = 0;
uxsel_tell(s);
}
static void uxsel_tell(Actual_Socket s)
{
int rwx = 0;
- if (!s->connected)
- rwx |= 2; /* write == connect */
- if (s->connected && !s->frozen)
- rwx |= 1 | 4; /* read, except */
- if (bufchain_size(&s->output_data))
- rwx |= 2; /* write */
- if (s->listener)
- rwx |= 1; /* read == accept */
+ if (!s->pending_error) {
+ if (s->listener) {
+ rwx |= 1; /* read == accept */
+ } else {
+ if (!s->connected)
+ rwx |= 2; /* write == connect */
+ if (s->connected && !s->frozen && !s->incomingeof)
+ rwx |= 1 | 4; /* read, except */
+ if (bufchain_size(&s->output_data))
+ rwx |= 2; /* write */
+ }
+ }
uxsel_set(s->s, rwx, net_select_result);
}
return 0;
}
-SockAddr platform_get_x11_unix_address(int displaynum, char **canonicalname)
+char *get_hostname(void)
+{
+ int len = 128;
+ char *hostname = NULL;
+ do {
+ len *= 2;
+ hostname = sresize(hostname, len, char);
+ if ((gethostname(hostname, len) < 0) &&
+ (errno != ENAMETOOLONG)) {
+ sfree(hostname);
+ hostname = NULL;
+ break;
+ }
+ } while (strlen(hostname) >= len-1);
+ return hostname;
+}
+
+SockAddr platform_get_x11_unix_address(const char *sockpath, int displaynum)
{
SockAddr ret = snew(struct SockAddr_tag);
int n;
memset(ret, 0, sizeof *ret);
- ret->family = AF_UNIX;
- n = snprintf(ret->hostname, sizeof ret->hostname,
- "%s%d", X11_UNIX_PATH, displaynum);
- if(n < 0)
+ ret->superfamily = UNIX;
+ /*
+ * In special circumstances (notably Mac OS X Leopard), we'll
+ * have been passed an explicit Unix socket path.
+ */
+ if (sockpath) {
+ n = snprintf(ret->hostname, sizeof ret->hostname,
+ "%s", sockpath);
+ } else {
+ n = snprintf(ret->hostname, sizeof ret->hostname,
+ "%s%d", X11_UNIX_PATH, displaynum);
+ }
+
+ if (n < 0)
ret->error = "snprintf failed";
- else if(n >= sizeof ret->hostname)
+ else if (n >= sizeof ret->hostname)
ret->error = "X11 UNIX name too long";
- else
- *canonicalname = dupstr(ret->hostname);
+
#ifndef NO_IPV6
ret->ais = NULL;
#else
ret->addresses = NULL;
+ ret->naddresses = 0;
#endif
+ ret->refcount = 1;
return ret;
}
projects / u / mdw / putty / blobdiff