* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
*/
#include <stdio.h>
#include <stdlib.h>
#include "qemu_socket.h"
#include "qemu-common.h" /* for qemu_isdigit */
+#include "main-loop.h"
#ifndef AI_ADDRCONFIG
# define AI_ADDRCONFIG 0
#endif
-static int sockets_debug = 0;
static const int on=1, off=0;
+/* used temporarely until all users are converted to QemuOpts */
+static QemuOptsList dummy_opts = {
+ .name = "dummy",
+ .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head),
+ .desc = {
+ {
+ .name = "path",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "host",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "port",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "to",
+ .type = QEMU_OPT_NUMBER,
+ },{
+ .name = "ipv4",
+ .type = QEMU_OPT_BOOL,
+ },{
+ .name = "ipv6",
+ .type = QEMU_OPT_BOOL,
+ },
+ { /* end if list */ }
+ },
+};
+
static int inet_getport(struct addrinfo *e)
{
struct sockaddr_in *i4;
}
}
-static const char *inet_strfamily(int family)
+const char *inet_strfamily(int family)
{
switch (family) {
case PF_INET6: return "ipv6";
case PF_INET: return "ipv4";
case PF_UNIX: return "unix";
}
- return "????";
+ return "unknown";
}
-static void inet_print_addrinfo(const char *tag, struct addrinfo *res)
-{
- struct addrinfo *e;
- char uaddr[INET6_ADDRSTRLEN+1];
- char uport[33];
-
- for (e = res; e != NULL; e = e->ai_next) {
- getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
- uaddr,INET6_ADDRSTRLEN,uport,32,
- NI_NUMERICHOST | NI_NUMERICSERV);
- fprintf(stderr,"%s: getaddrinfo: family %s, host %s, port %s\n",
- tag, inet_strfamily(e->ai_family), uaddr, uport);
- }
-}
-
-int inet_listen(const char *str, char *ostr, int olen,
- int socktype, int port_offset)
+int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
{
struct addrinfo ai,*res,*e;
- char addr[64];
+ const char *addr;
char port[33];
char uaddr[INET6_ADDRSTRLEN+1];
char uport[33];
- const char *opts, *h;
- int slisten,rc,pos,to,try_next;
+ int slisten, rc, to, port_min, port_max, p;
memset(&ai,0, sizeof(ai));
ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
ai.ai_family = PF_UNSPEC;
- ai.ai_socktype = socktype;
+ ai.ai_socktype = SOCK_STREAM;
- /* parse address */
- if (str[0] == ':') {
- /* no host given */
- addr[0] = '\0';
- if (1 != sscanf(str,":%32[^,]%n",port,&pos)) {
- fprintf(stderr, "%s: portonly parse error (%s)\n",
- __FUNCTION__, str);
- return -1;
- }
- } else if (str[0] == '[') {
- /* IPv6 addr */
- if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) {
- fprintf(stderr, "%s: ipv6 parse error (%s)\n",
- __FUNCTION__, str);
- return -1;
- }
- ai.ai_family = PF_INET6;
- } else if (qemu_isdigit(str[0])) {
- /* IPv4 addr */
- if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) {
- fprintf(stderr, "%s: ipv4 parse error (%s)\n",
- __FUNCTION__, str);
- return -1;
- }
- ai.ai_family = PF_INET;
- } else {
- /* hostname */
- if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) {
- fprintf(stderr, "%s: hostname parse error (%s)\n",
- __FUNCTION__, str);
- return -1;
- }
+ if ((qemu_opt_get(opts, "host") == NULL) ||
+ (qemu_opt_get(opts, "port") == NULL)) {
+ error_setg(errp, "host and/or port not specified");
+ return -1;
}
+ pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));
+ addr = qemu_opt_get(opts, "host");
- /* parse options */
- opts = str + pos;
- h = strstr(opts, ",to=");
- to = h ? atoi(h+4) : 0;
- if (strstr(opts, ",ipv4"))
+ to = qemu_opt_get_number(opts, "to", 0);
+ if (qemu_opt_get_bool(opts, "ipv4", 0))
ai.ai_family = PF_INET;
- if (strstr(opts, ",ipv6"))
+ if (qemu_opt_get_bool(opts, "ipv6", 0))
ai.ai_family = PF_INET6;
/* lookup */
snprintf(port, sizeof(port), "%d", atoi(port) + port_offset);
rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
if (rc != 0) {
- fprintf(stderr,"%s: getaddrinfo(%s,%s): %s\n", __FUNCTION__,
- addr, port, gai_strerror(rc));
+ error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
+ gai_strerror(rc));
return -1;
}
- if (sockets_debug)
- inet_print_addrinfo(__FUNCTION__, res);
/* create socket + bind */
for (e = res; e != NULL; e = e->ai_next) {
getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
uaddr,INET6_ADDRSTRLEN,uport,32,
NI_NUMERICHOST | NI_NUMERICSERV);
- slisten = socket(e->ai_family, e->ai_socktype, e->ai_protocol);
+ slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
if (slisten < 0) {
- fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
- inet_strfamily(e->ai_family), strerror(errno));
+ if (!e->ai_next) {
+ error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);
+ }
continue;
}
}
#endif
- for (;;) {
+ port_min = inet_getport(e);
+ port_max = to ? to + port_offset : port_min;
+ for (p = port_min; p <= port_max; p++) {
+ inet_setport(e, p);
if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {
- if (sockets_debug)
- fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
- inet_strfamily(e->ai_family), uaddr, inet_getport(e));
goto listen;
}
- try_next = to && (inet_getport(e) <= to + port_offset);
- if (!try_next || sockets_debug)
- fprintf(stderr,"%s: bind(%s,%s,%d): %s\n", __FUNCTION__,
- inet_strfamily(e->ai_family), uaddr, inet_getport(e),
- strerror(errno));
- if (try_next) {
- inet_setport(e, inet_getport(e) + 1);
- continue;
+ if (p == port_max) {
+ if (!e->ai_next) {
+ error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED);
+ }
}
- break;
}
closesocket(slisten);
}
- fprintf(stderr, "%s: FAILED\n", __FUNCTION__);
freeaddrinfo(res);
return -1;
listen:
if (listen(slisten,1) != 0) {
- perror("listen");
+ error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED);
closesocket(slisten);
freeaddrinfo(res);
return -1;
}
- if (ostr) {
- if (e->ai_family == PF_INET6) {
- snprintf(ostr, olen, "[%s]:%d%s", uaddr,
- inet_getport(e) - port_offset, opts);
- } else {
- snprintf(ostr, olen, "%s:%d%s", uaddr,
- inet_getport(e) - port_offset, opts);
+ snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset);
+ qemu_opt_set(opts, "host", uaddr);
+ qemu_opt_set(opts, "port", uport);
+ qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off");
+ qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off");
+ freeaddrinfo(res);
+ return slisten;
+}
+
+#ifdef _WIN32
+#define QEMU_SOCKET_RC_INPROGRESS(rc) \
+ ((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY)
+#else
+#define QEMU_SOCKET_RC_INPROGRESS(rc) \
+ ((rc) == -EINPROGRESS)
+#endif
+
+/* Struct to store connect state for non blocking connect */
+typedef struct ConnectState {
+ int fd;
+ struct addrinfo *addr_list;
+ struct addrinfo *current_addr;
+ NonBlockingConnectHandler *callback;
+ void *opaque;
+} ConnectState;
+
+static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,
+ ConnectState *connect_state, Error **errp);
+
+static void wait_for_connect(void *opaque)
+{
+ ConnectState *s = opaque;
+ int val = 0, rc = 0;
+ socklen_t valsize = sizeof(val);
+ bool in_progress;
+
+ qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
+
+ do {
+ rc = getsockopt(s->fd, SOL_SOCKET, SO_ERROR, (void *) &val, &valsize);
+ } while (rc == -1 && socket_error() == EINTR);
+
+ /* update rc to contain error */
+ if (!rc && val) {
+ rc = -1;
+ }
+
+ /* connect error */
+ if (rc < 0) {
+ closesocket(s->fd);
+ s->fd = rc;
+ }
+
+ /* try to connect to the next address on the list */
+ if (s->current_addr) {
+ while (s->current_addr->ai_next != NULL && s->fd < 0) {
+ s->current_addr = s->current_addr->ai_next;
+ s->fd = inet_connect_addr(s->current_addr, &in_progress, s, NULL);
+ /* connect in progress */
+ if (in_progress) {
+ return;
+ }
}
+
+ freeaddrinfo(s->addr_list);
+ }
+
+ if (s->callback) {
+ s->callback(s->fd, s->opaque);
+ }
+ g_free(s);
+}
+
+static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,
+ ConnectState *connect_state, Error **errp)
+{
+ int sock, rc;
+
+ *in_progress = false;
+
+ sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
+ if (sock < 0) {
+ error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);
+ return -1;
+ }
+ qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+ if (connect_state != NULL) {
+ socket_set_nonblock(sock);
+ }
+ /* connect to peer */
+ do {
+ rc = 0;
+ if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {
+ rc = -socket_error();
+ }
+ } while (rc == -EINTR);
+
+ if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {
+ connect_state->fd = sock;
+ qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect,
+ connect_state);
+ *in_progress = true;
+ } else if (rc < 0) {
+ error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED);
+ closesocket(sock);
+ return -1;
}
+ return sock;
+}
+
+static struct addrinfo *inet_parse_connect_opts(QemuOpts *opts, Error **errp)
+{
+ struct addrinfo ai, *res;
+ int rc;
+ const char *addr;
+ const char *port;
+
+ memset(&ai, 0, sizeof(ai));
+
+ ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
+ ai.ai_family = PF_UNSPEC;
+ ai.ai_socktype = SOCK_STREAM;
+
+ addr = qemu_opt_get(opts, "host");
+ port = qemu_opt_get(opts, "port");
+ if (addr == NULL || port == NULL) {
+ error_setg(errp, "host and/or port not specified");
+ return NULL;
+ }
+
+ if (qemu_opt_get_bool(opts, "ipv4", 0)) {
+ ai.ai_family = PF_INET;
+ }
+ if (qemu_opt_get_bool(opts, "ipv6", 0)) {
+ ai.ai_family = PF_INET6;
+ }
+
+ /* lookup */
+ rc = getaddrinfo(addr, port, &ai, &res);
+ if (rc != 0) {
+ error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
+ gai_strerror(rc));
+ return NULL;
+ }
+ return res;
+}
+
+/**
+ * Create a socket and connect it to an address.
+ *
+ * @opts: QEMU options, recognized parameters strings "host" and "port",
+ * bools "ipv4" and "ipv6".
+ * @errp: set on error
+ * @callback: callback function for non-blocking connect
+ * @opaque: opaque for callback function
+ *
+ * Returns: -1 on error, file descriptor on success.
+ *
+ * If @callback is non-null, the connect is non-blocking. If this
+ * function succeeds, callback will be called when the connection
+ * completes, with the file descriptor on success, or -1 on error.
+ */
+int inet_connect_opts(QemuOpts *opts, Error **errp,
+ NonBlockingConnectHandler *callback, void *opaque)
+{
+ struct addrinfo *res, *e;
+ int sock = -1;
+ bool in_progress;
+ ConnectState *connect_state = NULL;
+
+ res = inet_parse_connect_opts(opts, errp);
+ if (!res) {
+ return -1;
+ }
+
+ if (callback != NULL) {
+ connect_state = g_malloc0(sizeof(*connect_state));
+ connect_state->addr_list = res;
+ connect_state->callback = callback;
+ connect_state->opaque = opaque;
+ }
+
+ for (e = res; e != NULL; e = e->ai_next) {
+ if (connect_state != NULL) {
+ connect_state->current_addr = e;
+ }
+ sock = inet_connect_addr(e, &in_progress, connect_state, errp);
+ if (in_progress) {
+ return sock;
+ } else if (sock >= 0) {
+ /* non blocking socket immediate success, call callback */
+ if (callback != NULL) {
+ callback(sock, opaque);
+ }
+ break;
+ }
+ }
+ g_free(connect_state);
freeaddrinfo(res);
- return slisten;
+ return sock;
}
-int inet_connect(const char *str, int socktype)
+int inet_dgram_opts(QemuOpts *opts, Error **errp)
{
- struct addrinfo ai,*res,*e;
- char addr[64];
- char port[33];
- char uaddr[INET6_ADDRSTRLEN+1];
- char uport[33];
- int sock,rc;
+ struct addrinfo ai, *peer = NULL, *local = NULL;
+ const char *addr;
+ const char *port;
+ int sock = -1, rc;
+ /* lookup peer addr */
memset(&ai,0, sizeof(ai));
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
ai.ai_family = PF_UNSPEC;
- ai.ai_socktype = socktype;
+ ai.ai_socktype = SOCK_DGRAM;
+
+ addr = qemu_opt_get(opts, "host");
+ port = qemu_opt_get(opts, "port");
+ if (addr == NULL || strlen(addr) == 0) {
+ addr = "localhost";
+ }
+ if (port == NULL || strlen(port) == 0) {
+ error_setg(errp, "remote port not specified");
+ return -1;
+ }
+
+ if (qemu_opt_get_bool(opts, "ipv4", 0))
+ ai.ai_family = PF_INET;
+ if (qemu_opt_get_bool(opts, "ipv6", 0))
+ ai.ai_family = PF_INET6;
+
+ if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
+ error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
+ gai_strerror(rc));
+ return -1;
+ }
+
+ /* lookup local addr */
+ memset(&ai,0, sizeof(ai));
+ ai.ai_flags = AI_PASSIVE;
+ ai.ai_family = peer->ai_family;
+ ai.ai_socktype = SOCK_DGRAM;
+
+ addr = qemu_opt_get(opts, "localaddr");
+ port = qemu_opt_get(opts, "localport");
+ if (addr == NULL || strlen(addr) == 0) {
+ addr = NULL;
+ }
+ if (!port || strlen(port) == 0)
+ port = "0";
+
+ if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
+ error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
+ gai_strerror(rc));
+ goto err;
+ }
+
+ /* create socket */
+ sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
+ if (sock < 0) {
+ error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);
+ goto err;
+ }
+ setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
+
+ /* bind socket */
+ if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
+ error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED);
+ goto err;
+ }
+
+ /* connect to peer */
+ if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
+ error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED);
+ goto err;
+ }
+
+ freeaddrinfo(local);
+ freeaddrinfo(peer);
+ return sock;
+
+err:
+ if (-1 != sock)
+ closesocket(sock);
+ if (local)
+ freeaddrinfo(local);
+ if (peer)
+ freeaddrinfo(peer);
+ return -1;
+}
+
+/* compatibility wrapper */
+static int inet_parse(QemuOpts *opts, const char *str)
+{
+ const char *optstr, *h;
+ char addr[64];
+ char port[33];
+ int pos;
/* parse address */
- if (str[0] == '[') {
+ if (str[0] == ':') {
+ /* no host given */
+ addr[0] = '\0';
+ if (1 != sscanf(str,":%32[^,]%n",port,&pos)) {
+ fprintf(stderr, "%s: portonly parse error (%s)\n",
+ __FUNCTION__, str);
+ return -1;
+ }
+ } else if (str[0] == '[') {
/* IPv6 addr */
- if (2 != sscanf(str,"[%64[^]]]:%32[^,]",addr,port)) {
+ if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) {
fprintf(stderr, "%s: ipv6 parse error (%s)\n",
__FUNCTION__, str);
return -1;
}
- ai.ai_family = PF_INET6;
+ qemu_opt_set(opts, "ipv6", "on");
} else if (qemu_isdigit(str[0])) {
/* IPv4 addr */
- if (2 != sscanf(str,"%64[0-9.]:%32[^,]",addr,port)) {
+ if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) {
fprintf(stderr, "%s: ipv4 parse error (%s)\n",
__FUNCTION__, str);
return -1;
}
- ai.ai_family = PF_INET;
+ qemu_opt_set(opts, "ipv4", "on");
} else {
/* hostname */
- if (2 != sscanf(str,"%64[^:]:%32[^,]",addr,port)) {
+ if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) {
fprintf(stderr, "%s: hostname parse error (%s)\n",
__FUNCTION__, str);
return -1;
}
}
+ qemu_opt_set(opts, "host", addr);
+ qemu_opt_set(opts, "port", port);
/* parse options */
- if (strstr(str, ",ipv4"))
- ai.ai_family = PF_INET;
- if (strstr(str, ",ipv6"))
- ai.ai_family = PF_INET6;
+ optstr = str + pos;
+ h = strstr(optstr, ",to=");
+ if (h)
+ qemu_opt_set(opts, "to", h+4);
+ if (strstr(optstr, ",ipv4"))
+ qemu_opt_set(opts, "ipv4", "on");
+ if (strstr(optstr, ",ipv6"))
+ qemu_opt_set(opts, "ipv6", "on");
+ return 0;
+}
- /* lookup */
- if (0 != (rc = getaddrinfo(addr, port, &ai, &res))) {
- fprintf(stderr,"getaddrinfo(%s,%s): %s\n", gai_strerror(rc),
- addr, port);
- return -1;
+int inet_listen(const char *str, char *ostr, int olen,
+ int socktype, int port_offset, Error **errp)
+{
+ QemuOpts *opts;
+ char *optstr;
+ int sock = -1;
+
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
+ if (inet_parse(opts, str) == 0) {
+ sock = inet_listen_opts(opts, port_offset, errp);
+ if (sock != -1 && ostr) {
+ optstr = strchr(str, ',');
+ if (qemu_opt_get_bool(opts, "ipv6", 0)) {
+ snprintf(ostr, olen, "[%s]:%s%s",
+ qemu_opt_get(opts, "host"),
+ qemu_opt_get(opts, "port"),
+ optstr ? optstr : "");
+ } else {
+ snprintf(ostr, olen, "%s:%s%s",
+ qemu_opt_get(opts, "host"),
+ qemu_opt_get(opts, "port"),
+ optstr ? optstr : "");
+ }
+ }
+ } else {
+ error_set(errp, QERR_SOCKET_CREATE_FAILED);
}
- if (sockets_debug)
- inet_print_addrinfo(__FUNCTION__, res);
+ qemu_opts_del(opts);
+ return sock;
+}
- for (e = res; e != NULL; e = e->ai_next) {
- if (getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
- uaddr,INET6_ADDRSTRLEN,uport,32,
- NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
- fprintf(stderr,"%s: getnameinfo: oops\n", __FUNCTION__);
- continue;
- }
- sock = socket(e->ai_family, e->ai_socktype, e->ai_protocol);
- if (sock < 0) {
- fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
- inet_strfamily(e->ai_family), strerror(errno));
- continue;
- }
- setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
-
- /* connect to peer */
- if (connect(sock,e->ai_addr,e->ai_addrlen) < 0) {
- if (sockets_debug || NULL == e->ai_next)
- fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
- inet_strfamily(e->ai_family),
- e->ai_canonname, uaddr, uport, strerror(errno));
- closesocket(sock);
- continue;
- }
- if (sockets_debug)
- fprintf(stderr, "%s: connect(%s,%s,%s,%s): OK\n", __FUNCTION__,
- inet_strfamily(e->ai_family),
- e->ai_canonname, uaddr, uport);
- freeaddrinfo(res);
- return sock;
+/**
+ * Create a blocking socket and connect it to an address.
+ *
+ * @str: address string
+ * @errp: set in case of an error
+ *
+ * Returns -1 in case of error, file descriptor on success
+ **/
+int inet_connect(const char *str, Error **errp)
+{
+ QemuOpts *opts;
+ int sock = -1;
+
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
+ if (inet_parse(opts, str) == 0) {
+ sock = inet_connect_opts(opts, errp, NULL, NULL);
+ } else {
+ error_set(errp, QERR_SOCKET_CREATE_FAILED);
}
- freeaddrinfo(res);
- return -1;
+ qemu_opts_del(opts);
+ return sock;
+}
+
+/**
+ * Create a non-blocking socket and connect it to an address.
+ * Calls the callback function with fd in case of success or -1 in case of
+ * error.
+ *
+ * @str: address string
+ * @callback: callback function that is called when connect completes,
+ * cannot be NULL.
+ * @opaque: opaque for callback function
+ * @errp: set in case of an error
+ *
+ * Returns: -1 on immediate error, file descriptor on success.
+ **/
+int inet_nonblocking_connect(const char *str,
+ NonBlockingConnectHandler *callback,
+ void *opaque, Error **errp)
+{
+ QemuOpts *opts;
+ int sock = -1;
+
+ g_assert(callback != NULL);
+
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
+ if (inet_parse(opts, str) == 0) {
+ sock = inet_connect_opts(opts, errp, callback, opaque);
+ } else {
+ error_set(errp, QERR_SOCKET_CREATE_FAILED);
+ }
+ qemu_opts_del(opts);
+ return sock;
}
#ifndef _WIN32
-int unix_listen(const char *str, char *ostr, int olen)
+int unix_listen_opts(QemuOpts *opts, Error **errp)
{
struct sockaddr_un un;
- char *path, *opts;
- int sock, fd, len;
+ const char *path = qemu_opt_get(opts, "path");
+ int sock, fd;
- sock = socket(PF_UNIX, SOCK_STREAM, 0);
+ sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
if (sock < 0) {
perror("socket(unix)");
return -1;
}
- opts = strchr(str, ',');
- if (opts) {
- len = opts - str;
- path = qemu_malloc(len+1);
- snprintf(path, len+1, "%.*s", len, str);
- } else
- path = qemu_strdup(str);
-
memset(&un, 0, sizeof(un));
un.sun_family = AF_UNIX;
if (path && strlen(path)) {
* worst case possible is bind() failing, i.e. a DoS attack.
*/
fd = mkstemp(un.sun_path); close(fd);
+ qemu_opt_set(opts, "path", un.sun_path);
}
- snprintf(ostr, olen, "%s%s", un.sun_path, opts ? opts : "");
unlink(un.sun_path);
if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
goto err;
}
- if (sockets_debug)
- fprintf(stderr, "bind(unix:%s): OK\n", un.sun_path);
- qemu_free(path);
return sock;
err:
- qemu_free(path);
closesocket(sock);
return -1;
}
-int unix_connect(const char *path)
+int unix_connect_opts(QemuOpts *opts, Error **errp,
+ NonBlockingConnectHandler *callback, void *opaque)
{
struct sockaddr_un un;
- int sock;
+ const char *path = qemu_opt_get(opts, "path");
+ ConnectState *connect_state = NULL;
+ int sock, rc;
+
+ if (NULL == path) {
+ fprintf(stderr, "unix connect: no path specified\n");
+ return -1;
+ }
- sock = socket(PF_UNIX, SOCK_STREAM, 0);
+ sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
if (sock < 0) {
perror("socket(unix)");
return -1;
}
+ if (callback != NULL) {
+ connect_state = g_malloc0(sizeof(*connect_state));
+ connect_state->callback = callback;
+ connect_state->opaque = opaque;
+ socket_set_nonblock(sock);
+ }
memset(&un, 0, sizeof(un));
un.sun_family = AF_UNIX;
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
- if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
+
+ /* connect to peer */
+ do {
+ rc = 0;
+ if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) {
+ rc = -socket_error();
+ }
+ } while (rc == -EINTR);
+
+ if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {
+ connect_state->fd = sock;
+ qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect,
+ connect_state);
+ return sock;
+ } else if (rc >= 0) {
+ /* non blocking socket immediate success, call callback */
+ if (callback != NULL) {
+ callback(sock, opaque);
+ }
+ }
+
+ if (rc < 0) {
fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
- return -1;
+ close(sock);
+ sock = -1;
}
- if (sockets_debug)
- fprintf(stderr, "connect(unix:%s): OK\n", path);
+ g_free(connect_state);
return sock;
}
#else
-int unix_listen(const char *path, char *ostr, int olen)
+int unix_listen_opts(QemuOpts *opts, Error **errp)
{
fprintf(stderr, "unix sockets are not available on windows\n");
+ errno = ENOTSUP;
return -1;
}
-int unix_connect(const char *path)
+int unix_connect_opts(QemuOpts *opts, Error **errp,
+ NonBlockingConnectHandler *callback, void *opaque)
{
fprintf(stderr, "unix sockets are not available on windows\n");
+ errno = ENOTSUP;
return -1;
}
+#endif
+
+/* compatibility wrapper */
+int unix_listen(const char *str, char *ostr, int olen, Error **errp)
+{
+ QemuOpts *opts;
+ char *path, *optstr;
+ int sock, len;
+
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
+
+ optstr = strchr(str, ',');
+ if (optstr) {
+ len = optstr - str;
+ if (len) {
+ path = g_malloc(len+1);
+ snprintf(path, len+1, "%.*s", len, str);
+ qemu_opt_set(opts, "path", path);
+ g_free(path);
+ }
+ } else {
+ qemu_opt_set(opts, "path", str);
+ }
+
+ sock = unix_listen_opts(opts, errp);
+
+ if (sock != -1 && ostr)
+ snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
+ qemu_opts_del(opts);
+ return sock;
+}
+
+int unix_connect(const char *path, Error **errp)
+{
+ QemuOpts *opts;
+ int sock;
+
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
+ qemu_opt_set(opts, "path", path);
+ sock = unix_connect_opts(opts, errp, NULL, NULL);
+ qemu_opts_del(opts);
+ return sock;
+}
+
+
+int unix_nonblocking_connect(const char *path,
+ NonBlockingConnectHandler *callback,
+ void *opaque, Error **errp)
+{
+ QemuOpts *opts;
+ int sock = -1;
+
+ g_assert(callback != NULL);
+
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
+ qemu_opt_set(opts, "path", path);
+ sock = unix_connect_opts(opts, errp, callback, opaque);
+ qemu_opts_del(opts);
+ return sock;
+}
+#ifdef _WIN32
+static void socket_cleanup(void)
+{
+ WSACleanup();
+}
+#endif
+
+int socket_init(void)
+{
+#ifdef _WIN32
+ WSADATA Data;
+ int ret, err;
+
+ ret = WSAStartup(MAKEWORD(2,2), &Data);
+ if (ret != 0) {
+ err = WSAGetLastError();
+ fprintf(stderr, "WSAStartup: %d\n", err);
+ return -1;
+ }
+ atexit(socket_cleanup);
#endif
+ return 0;
+}
projects / mirror_qemu.git / blobdiff