* 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 */
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_opts(QemuOpts *opts, int port_offset)
+int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
{
struct addrinfo ai,*res,*e;
const char *addr;
char port[33];
char uaddr[INET6_ADDRSTRLEN+1];
char uport[33];
- int slisten,rc,to,try_next;
+ int slisten, rc, to, port_min, port_max, p;
memset(&ai,0, sizeof(ai));
ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
if ((qemu_opt_get(opts, "host") == NULL) ||
(qemu_opt_get(opts, "port") == NULL)) {
fprintf(stderr, "%s: host and/or port not specified\n", __FUNCTION__);
+ error_set(errp, QERR_SOCKET_CREATE_FAILED);
return -1;
}
pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));
if (rc != 0) {
fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
gai_strerror(rc));
+ error_set(errp, QERR_SOCKET_CREATE_FAILED);
return -1;
}
- if (sockets_debug)
- inet_print_addrinfo(__FUNCTION__, res);
/* create socket + bind */
for (e = res; e != NULL; e = e->ai_next) {
if (slisten < 0) {
fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
inet_strfamily(e->ai_family), strerror(errno));
+ if (!e->ai_next) {
+ error_set(errp, 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)
+ if (p == port_max) {
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 (!e->ai_next) {
+ error_set(errp, QERR_SOCKET_BIND_FAILED);
+ }
}
- break;
}
closesocket(slisten);
}
listen:
if (listen(slisten,1) != 0) {
+ error_set(errp, QERR_SOCKET_LISTEN_FAILED);
perror("listen");
closesocket(slisten);
freeaddrinfo(res);
return slisten;
}
-int inet_connect_opts(QemuOpts *opts)
+#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);
+
+static void wait_for_connect(void *opaque)
{
- struct addrinfo ai,*res,*e;
+ 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 */
+ 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);
+ /* 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)
+{
+ int sock, rc;
+
+ *in_progress = false;
+
+ sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
+ if (sock < 0) {
+ fprintf(stderr, "%s: socket(%s): %s\n", __func__,
+ inet_strfamily(addr->ai_family), strerror(errno));
+ 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) {
+ 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;
- char uaddr[INET6_ADDRSTRLEN+1];
- char uport[33];
- int sock,rc;
- memset(&ai,0, sizeof(ai));
+ 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) {
- fprintf(stderr, "inet_connect: host and/or port not specified\n");
- return -1;
+ fprintf(stderr,
+ "inet_parse_connect_opts: host and/or port not specified\n");
+ error_set(errp, QERR_SOCKET_CREATE_FAILED);
+ return NULL;
}
- if (qemu_opt_get_bool(opts, "ipv4", 0))
+ if (qemu_opt_get_bool(opts, "ipv4", 0)) {
ai.ai_family = PF_INET;
- if (qemu_opt_get_bool(opts, "ipv6", 0))
+ }
+ if (qemu_opt_get_bool(opts, "ipv6", 0)) {
ai.ai_family = PF_INET6;
+ }
/* lookup */
- if (0 != (rc = getaddrinfo(addr, port, &ai, &res))) {
- fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
+ rc = getaddrinfo(addr, port, &ai, &res);
+ if (rc != 0) {
+ fprintf(stderr, "getaddrinfo(%s,%s): %s\n", addr, port,
gai_strerror(rc));
- return -1;
+ error_set(errp, QERR_SOCKET_CREATE_FAILED);
+ 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;
}
- if (sockets_debug)
- inet_print_addrinfo(__FUNCTION__, res);
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 = qemu_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;
+ if (connect_state != NULL) {
+ connect_state->current_addr = e;
}
- 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;
+ sock = inet_connect_addr(e, &in_progress, connect_state);
+ if (in_progress) {
+ return sock;
+ } else if (sock >= 0) {
+ /* non blocking socket immediate success, call callback */
+ if (callback != NULL) {
+ callback(sock, opaque);
+ }
+ break;
}
- 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;
}
+ if (sock < 0) {
+ error_set(errp, QERR_SOCKET_CONNECT_FAILED);
+ }
+ g_free(connect_state);
freeaddrinfo(res);
- return -1;
+ return sock;
}
int inet_dgram_opts(QemuOpts *opts)
gai_strerror(rc));
return -1;
}
- if (sockets_debug) {
- fprintf(stderr, "%s: peer (%s:%s)\n", __FUNCTION__, addr, port);
- inet_print_addrinfo(__FUNCTION__, peer);
- }
/* lookup local addr */
memset(&ai,0, sizeof(ai));
if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
gai_strerror(rc));
- return -1;
- }
- if (sockets_debug) {
- fprintf(stderr, "%s: local (%s:%s)\n", __FUNCTION__, addr, port);
- inet_print_addrinfo(__FUNCTION__, local);
+ goto err;
}
/* create socket */
}
int inet_listen(const char *str, char *ostr, int olen,
- int socktype, int port_offset)
+ int socktype, int port_offset, Error **errp)
{
QemuOpts *opts;
char *optstr;
int sock = -1;
- opts = qemu_opts_create(&dummy_opts, NULL, 0);
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
if (inet_parse(opts, str) == 0) {
- sock = inet_listen_opts(opts, port_offset);
+ sock = inet_listen_opts(opts, port_offset, errp);
if (sock != -1 && ostr) {
optstr = strchr(str, ',');
if (qemu_opt_get_bool(opts, "ipv6", 0)) {
optstr ? optstr : "");
}
}
+ } else {
+ error_set(errp, QERR_SOCKET_CREATE_FAILED);
}
qemu_opts_del(opts);
return sock;
}
-int inet_connect(const char *str, int socktype)
+/**
+ * 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);
- if (inet_parse(opts, str) == 0)
- sock = inet_connect_opts(opts);
+ 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);
+ }
+ 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;
}
goto err;
}
- if (sockets_debug)
- fprintf(stderr, "bind(unix:%s): OK\n", un.sun_path);
return sock;
err:
return -1;
}
- if (sockets_debug)
- fprintf(stderr, "connect(unix:%s): OK\n", path);
return sock;
}
char *path, *optstr;
int sock, len;
- opts = qemu_opts_create(&dummy_opts, NULL, 0);
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
optstr = strchr(str, ',');
if (optstr) {
QemuOpts *opts;
int sock;
- opts = qemu_opts_create(&dummy_opts, NULL, 0);
+ opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
qemu_opt_set(opts, "path", path);
sock = unix_connect_opts(opts);
qemu_opts_del(opts);
projects / qemu.git / blobdiff