--- /dev/null
+/*
+ * inet and unix socket functions for qemu
+ *
+ * (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; under version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * 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 <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "monitor/monitor.h"
+#include "qemu/sockets.h"
+#include "qemu/main-loop.h"
+
+#ifndef AI_ADDRCONFIG
+# define AI_ADDRCONFIG 0
+#endif
+#ifndef AI_V4MAPPED
+# define AI_V4MAPPED 0
+#endif
+
+/* used temporarily until all users are converted to QemuOpts */
+QemuOptsList socket_optslist = {
+ .name = "socket",
+ .head = QTAILQ_HEAD_INITIALIZER(socket_optslist.head),
+ .desc = {
+ {
+ .name = "path",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "host",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "port",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "localaddr",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "localport",
+ .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;
+ struct sockaddr_in6 *i6;
+
+ switch (e->ai_family) {
+ case PF_INET6:
+ i6 = (void*)e->ai_addr;
+ return ntohs(i6->sin6_port);
+ case PF_INET:
+ i4 = (void*)e->ai_addr;
+ return ntohs(i4->sin_port);
+ default:
+ return 0;
+ }
+}
+
+static void inet_setport(struct addrinfo *e, int port)
+{
+ struct sockaddr_in *i4;
+ struct sockaddr_in6 *i6;
+
+ switch (e->ai_family) {
+ case PF_INET6:
+ i6 = (void*)e->ai_addr;
+ i6->sin6_port = htons(port);
+ break;
+ case PF_INET:
+ i4 = (void*)e->ai_addr;
+ i4->sin_port = htons(port);
+ break;
+ }
+}
+
+NetworkAddressFamily inet_netfamily(int family)
+{
+ switch (family) {
+ case PF_INET6: return NETWORK_ADDRESS_FAMILY_IPV6;
+ case PF_INET: return NETWORK_ADDRESS_FAMILY_IPV4;
+ case PF_UNIX: return NETWORK_ADDRESS_FAMILY_UNIX;
+ }
+ return NETWORK_ADDRESS_FAMILY_UNKNOWN;
+}
+
+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, port_min, port_max, p;
+
+ memset(&ai,0, sizeof(ai));
+ ai.ai_flags = AI_PASSIVE;
+ ai.ai_family = PF_UNSPEC;
+ ai.ai_socktype = SOCK_STREAM;
+
+ 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");
+
+ to = qemu_opt_get_number(opts, "to", 0);
+ 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 */
+ if (port_offset) {
+ unsigned long long baseport;
+ if (parse_uint_full(port, &baseport, 10) < 0) {
+ error_setg(errp, "can't convert to a number: %s", port);
+ return -1;
+ }
+ if (baseport > 65535 ||
+ baseport + port_offset > 65535) {
+ error_setg(errp, "port %s out of range", port);
+ return -1;
+ }
+ snprintf(port, sizeof(port), "%d", (int)baseport + port_offset);
+ }
+ rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
+ if (rc != 0) {
+ error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
+ gai_strerror(rc));
+ return -1;
+ }
+
+ /* 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 = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
+ if (slisten < 0) {
+ if (!e->ai_next) {
+ error_setg_errno(errp, errno, "Failed to create socket");
+ }
+ continue;
+ }
+
+ socket_set_fast_reuse(slisten);
+#ifdef IPV6_V6ONLY
+ if (e->ai_family == PF_INET6) {
+ /* listen on both ipv4 and ipv6 */
+ const int off = 0;
+ qemu_setsockopt(slisten, IPPROTO_IPV6, IPV6_V6ONLY, &off,
+ sizeof(off));
+ }
+#endif
+
+ 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) {
+ goto listen;
+ }
+ if (p == port_max) {
+ if (!e->ai_next) {
+ error_setg_errno(errp, errno, "Failed to bind socket");
+ }
+ }
+ }
+ closesocket(slisten);
+ }
+ freeaddrinfo(res);
+ return -1;
+
+listen:
+ if (listen(slisten,1) != 0) {
+ error_setg_errno(errp, errno, "Failed to listen on socket");
+ closesocket(slisten);
+ freeaddrinfo(res);
+ return -1;
+ }
+ qemu_opt_set(opts, "host", uaddr, &error_abort);
+ qemu_opt_set_number(opts, "port", inet_getport(e) - port_offset,
+ &error_abort);
+ qemu_opt_set_bool(opts, "ipv6", e->ai_family == PF_INET6,
+ &error_abort);
+ qemu_opt_set_bool(opts, "ipv4", e->ai_family != PF_INET6,
+ &error_abort);
+ 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;
+ Error *err = NULL;
+
+ qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
+
+ do {
+ rc = qemu_getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &val, &valsize);
+ } while (rc == -1 && socket_error() == EINTR);
+
+ /* update rc to contain error */
+ if (!rc && val) {
+ rc = -1;
+ errno = val;
+ }
+
+ /* connect error */
+ if (rc < 0) {
+ error_setg_errno(&err, errno, "Error connecting to socket");
+ 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);
+ if (s->fd < 0) {
+ error_free(err);
+ err = NULL;
+ error_setg_errno(&err, errno, "Unable to start socket connect");
+ }
+ /* connect in progress */
+ if (in_progress) {
+ goto out;
+ }
+ }
+
+ freeaddrinfo(s->addr_list);
+ }
+
+ if (s->callback) {
+ s->callback(s->fd, err, s->opaque);
+ }
+ g_free(s);
+out:
+ error_free(err);
+}
+
+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_setg_errno(errp, errno, "Failed to create socket");
+ return -1;
+ }
+ socket_set_fast_reuse(sock);
+ if (connect_state != NULL) {
+ qemu_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_handler(sock, NULL, wait_for_connect, connect_state);
+ *in_progress = true;
+ } else if (rc < 0) {
+ error_setg_errno(errp, errno, "Failed to connect socket");
+ 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_V4MAPPED | 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)
+{
+ Error *local_err = NULL;
+ 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) {
+ error_free(local_err);
+ local_err = NULL;
+ if (connect_state != NULL) {
+ connect_state->current_addr = e;
+ }
+ sock = inet_connect_addr(e, &in_progress, connect_state, &local_err);
+ if (sock >= 0) {
+ break;
+ }
+ }
+
+ if (sock < 0) {
+ error_propagate(errp, local_err);
+ } else if (in_progress) {
+ /* wait_for_connect() will do the rest */
+ return sock;
+ } else {
+ if (callback) {
+ callback(sock, NULL, opaque);
+ }
+ }
+ g_free(connect_state);
+ freeaddrinfo(res);
+ return sock;
+}
+
+int inet_dgram_opts(QemuOpts *opts, Error **errp)
+{
+ 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_V4MAPPED | AI_ADDRCONFIG;
+ ai.ai_family = PF_UNSPEC;
+ 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_setg_errno(errp, errno, "Failed to create socket");
+ goto err;
+ }
+ socket_set_fast_reuse(sock);
+
+ /* bind socket */
+ if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
+ error_setg_errno(errp, errno, "Failed to bind socket");
+ goto err;
+ }
+
+ /* connect to peer */
+ if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
+ error_setg_errno(errp, errno, "Failed to connect socket");
+ 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 */
+InetSocketAddress *inet_parse(const char *str, Error **errp)
+{
+ InetSocketAddress *addr;
+ const char *optstr, *h;
+ char host[65];
+ char port[33];
+ int to;
+ int pos;
+
+ addr = g_new0(InetSocketAddress, 1);
+
+ /* parse address */
+ if (str[0] == ':') {
+ /* no host given */
+ host[0] = '\0';
+ if (1 != sscanf(str, ":%32[^,]%n", port, &pos)) {
+ error_setg(errp, "error parsing port in address '%s'", str);
+ goto fail;
+ }
+ } else if (str[0] == '[') {
+ /* IPv6 addr */
+ if (2 != sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos)) {
+ error_setg(errp, "error parsing IPv6 address '%s'", str);
+ goto fail;
+ }
+ addr->ipv6 = addr->has_ipv6 = true;
+ } else {
+ /* hostname or IPv4 addr */
+ if (2 != sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos)) {
+ error_setg(errp, "error parsing address '%s'", str);
+ goto fail;
+ }
+ if (host[strspn(host, "0123456789.")] == '\0') {
+ addr->ipv4 = addr->has_ipv4 = true;
+ }
+ }
+
+ addr->host = g_strdup(host);
+ addr->port = g_strdup(port);
+
+ /* parse options */
+ optstr = str + pos;
+ h = strstr(optstr, ",to=");
+ if (h) {
+ h += 4;
+ if (sscanf(h, "%d%n", &to, &pos) != 1 ||
+ (h[pos] != '\0' && h[pos] != ',')) {
+ error_setg(errp, "error parsing to= argument");
+ goto fail;
+ }
+ addr->has_to = true;
+ addr->to = to;
+ }
+ if (strstr(optstr, ",ipv4")) {
+ addr->ipv4 = addr->has_ipv4 = true;
+ }
+ if (strstr(optstr, ",ipv6")) {
+ addr->ipv6 = addr->has_ipv6 = true;
+ }
+ return addr;
+
+fail:
+ qapi_free_InetSocketAddress(addr);
+ return NULL;
+}
+
+static void inet_addr_to_opts(QemuOpts *opts, const InetSocketAddress *addr)
+{
+ bool ipv4 = addr->ipv4 || !addr->has_ipv4;
+ bool ipv6 = addr->ipv6 || !addr->has_ipv6;
+
+ if (!ipv4 || !ipv6) {
+ qemu_opt_set_bool(opts, "ipv4", ipv4, &error_abort);
+ qemu_opt_set_bool(opts, "ipv6", ipv6, &error_abort);
+ }
+ if (addr->has_to) {
+ qemu_opt_set_number(opts, "to", addr->to, &error_abort);
+ }
+ qemu_opt_set(opts, "host", addr->host, &error_abort);
+ qemu_opt_set(opts, "port", addr->port, &error_abort);
+}
+
+int inet_listen(const char *str, char *ostr, int olen,
+ int socktype, int port_offset, Error **errp)
+{
+ QemuOpts *opts;
+ char *optstr;
+ int sock = -1;
+ InetSocketAddress *addr;
+
+ addr = inet_parse(str, errp);
+ if (addr != NULL) {
+ opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+ inet_addr_to_opts(opts, addr);
+ qapi_free_InetSocketAddress(addr);
+ 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 : "");
+ }
+ }
+ qemu_opts_del(opts);
+ }
+ 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;
+ InetSocketAddress *addr;
+
+ addr = inet_parse(str, errp);
+ if (addr != NULL) {
+ opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+ inet_addr_to_opts(opts, addr);
+ qapi_free_InetSocketAddress(addr);
+ sock = inet_connect_opts(opts, errp, NULL, NULL);
+ 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;
+ InetSocketAddress *addr;
+
+ g_assert(callback != NULL);
+
+ addr = inet_parse(str, errp);
+ if (addr != NULL) {
+ opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+ inet_addr_to_opts(opts, addr);
+ qapi_free_InetSocketAddress(addr);
+ sock = inet_connect_opts(opts, errp, callback, opaque);
+ qemu_opts_del(opts);
+ }
+ return sock;
+}
+
+#ifndef _WIN32
+
+int unix_listen_opts(QemuOpts *opts, Error **errp)
+{
+ struct sockaddr_un un;
+ const char *path = qemu_opt_get(opts, "path");
+ int sock, fd;
+
+ sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
+ if (sock < 0) {
+ error_setg_errno(errp, errno, "Failed to create Unix socket");
+ return -1;
+ }
+
+ memset(&un, 0, sizeof(un));
+ un.sun_family = AF_UNIX;
+ if (path && strlen(path)) {
+ snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
+ } else {
+ const char *tmpdir = getenv("TMPDIR");
+ tmpdir = tmpdir ? tmpdir : "/tmp";
+ if (snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",
+ tmpdir) >= sizeof(un.sun_path)) {
+ error_setg_errno(errp, errno,
+ "TMPDIR environment variable (%s) too large", tmpdir);
+ goto err;
+ }
+
+ /*
+ * This dummy fd usage silences the mktemp() unsecure warning.
+ * Using mkstemp() doesn't make things more secure here
+ * though. bind() complains about existing files, so we have
+ * to unlink first and thus re-open the race window. The
+ * worst case possible is bind() failing, i.e. a DoS attack.
+ */
+ fd = mkstemp(un.sun_path);
+ if (fd < 0) {
+ error_setg_errno(errp, errno,
+ "Failed to make a temporary socket name in %s", tmpdir);
+ goto err;
+ }
+ close(fd);
+ qemu_opt_set(opts, "path", un.sun_path, &error_abort);
+ }
+
+ if ((access(un.sun_path, F_OK) == 0) &&
+ unlink(un.sun_path) < 0) {
+ error_setg_errno(errp, errno,
+ "Failed to unlink socket %s", un.sun_path);
+ goto err;
+ }
+ if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
+ error_setg_errno(errp, errno, "Failed to bind socket to %s", un.sun_path);
+ goto err;
+ }
+ if (listen(sock, 1) < 0) {
+ error_setg_errno(errp, errno, "Failed to listen on socket");
+ goto err;
+ }
+
+ return sock;
+
+err:
+ closesocket(sock);
+ return -1;
+}
+
+int unix_connect_opts(QemuOpts *opts, Error **errp,
+ NonBlockingConnectHandler *callback, void *opaque)
+{
+ struct sockaddr_un un;
+ const char *path = qemu_opt_get(opts, "path");
+ ConnectState *connect_state = NULL;
+ int sock, rc;
+
+ if (path == NULL) {
+ error_setg(errp, "unix connect: no path specified");
+ return -1;
+ }
+
+ sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
+ if (sock < 0) {
+ error_setg_errno(errp, errno, "Failed to create socket");
+ return -1;
+ }
+ if (callback != NULL) {
+ connect_state = g_malloc0(sizeof(*connect_state));
+ connect_state->callback = callback;
+ connect_state->opaque = opaque;
+ qemu_set_nonblock(sock);
+ }
+
+ memset(&un, 0, sizeof(un));
+ un.sun_family = AF_UNIX;
+ snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
+
+ /* 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_handler(sock, NULL, wait_for_connect, connect_state);
+ return sock;
+ } else if (rc >= 0) {
+ /* non blocking socket immediate success, call callback */
+ if (callback != NULL) {
+ callback(sock, NULL, opaque);
+ }
+ }
+
+ if (rc < 0) {
+ error_setg_errno(errp, -rc, "Failed to connect socket");
+ close(sock);
+ sock = -1;
+ }
+
+ g_free(connect_state);
+ return sock;
+}
+
+#else
+
+int unix_listen_opts(QemuOpts *opts, Error **errp)
+{
+ error_setg(errp, "unix sockets are not available on windows");
+ errno = ENOTSUP;
+ return -1;
+}
+
+int unix_connect_opts(QemuOpts *opts, Error **errp,
+ NonBlockingConnectHandler *callback, void *opaque)
+{
+ error_setg(errp, "unix sockets are not available on windows");
+ 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(&socket_optslist, NULL, 0, &error_abort);
+
+ 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, &error_abort);
+ g_free(path);
+ }
+ } else {
+ qemu_opt_set(opts, "path", str, &error_abort);
+ }
+
+ 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(&socket_optslist, NULL, 0, &error_abort);
+ qemu_opt_set(opts, "path", path, &error_abort);
+ 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(&socket_optslist, NULL, 0, &error_abort);
+ qemu_opt_set(opts, "path", path, &error_abort);
+ sock = unix_connect_opts(opts, errp, callback, opaque);
+ qemu_opts_del(opts);
+ return sock;
+}
+
+SocketAddress *socket_parse(const char *str, Error **errp)
+{
+ SocketAddress *addr;
+
+ addr = g_new0(SocketAddress, 1);
+ if (strstart(str, "unix:", NULL)) {
+ if (str[5] == '\0') {
+ error_setg(errp, "invalid Unix socket address");
+ goto fail;
+ } else {
+ addr->kind = SOCKET_ADDRESS_KIND_UNIX;
+ addr->q_unix = g_new(UnixSocketAddress, 1);
+ addr->q_unix->path = g_strdup(str + 5);
+ }
+ } else if (strstart(str, "fd:", NULL)) {
+ if (str[3] == '\0') {
+ error_setg(errp, "invalid file descriptor address");
+ goto fail;
+ } else {
+ addr->kind = SOCKET_ADDRESS_KIND_FD;
+ addr->fd = g_new(String, 1);
+ addr->fd->str = g_strdup(str + 3);
+ }
+ } else {
+ addr->kind = SOCKET_ADDRESS_KIND_INET;
+ addr->inet = inet_parse(str, errp);
+ if (addr->inet == NULL) {
+ goto fail;
+ }
+ }
+ return addr;
+
+fail:
+ qapi_free_SocketAddress(addr);
+ return NULL;
+}
+
+int socket_connect(SocketAddress *addr, Error **errp,
+ NonBlockingConnectHandler *callback, void *opaque)
+{
+ QemuOpts *opts;
+ int fd;
+
+ opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+ switch (addr->kind) {
+ case SOCKET_ADDRESS_KIND_INET:
+ inet_addr_to_opts(opts, addr->inet);
+ fd = inet_connect_opts(opts, errp, callback, opaque);
+ break;
+
+ case SOCKET_ADDRESS_KIND_UNIX:
+ qemu_opt_set(opts, "path", addr->q_unix->path, &error_abort);
+ fd = unix_connect_opts(opts, errp, callback, opaque);
+ break;
+
+ case SOCKET_ADDRESS_KIND_FD:
+ fd = monitor_get_fd(cur_mon, addr->fd->str, errp);
+ if (fd >= 0 && callback) {
+ qemu_set_nonblock(fd);
+ callback(fd, NULL, opaque);
+ }
+ break;
+
+ default:
+ abort();
+ }
+ qemu_opts_del(opts);
+ return fd;
+}
+
+int socket_listen(SocketAddress *addr, Error **errp)
+{
+ QemuOpts *opts;
+ int fd;
+
+ opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+ switch (addr->kind) {
+ case SOCKET_ADDRESS_KIND_INET:
+ inet_addr_to_opts(opts, addr->inet);
+ fd = inet_listen_opts(opts, 0, errp);
+ break;
+
+ case SOCKET_ADDRESS_KIND_UNIX:
+ qemu_opt_set(opts, "path", addr->q_unix->path, &error_abort);
+ fd = unix_listen_opts(opts, errp);
+ break;
+
+ case SOCKET_ADDRESS_KIND_FD:
+ fd = monitor_get_fd(cur_mon, addr->fd->str, errp);
+ break;
+
+ default:
+ abort();
+ }
+ qemu_opts_del(opts);
+ return fd;
+}
+
+int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp)
+{
+ QemuOpts *opts;
+ int fd;
+
+ opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+ switch (remote->kind) {
+ case SOCKET_ADDRESS_KIND_INET:
+ inet_addr_to_opts(opts, remote->inet);
+ if (local) {
+ qemu_opt_set(opts, "localaddr", local->inet->host, &error_abort);
+ qemu_opt_set(opts, "localport", local->inet->port, &error_abort);
+ }
+ fd = inet_dgram_opts(opts, errp);
+ break;
+
+ default:
+ error_setg(errp, "socket type unsupported for datagram");
+ fd = -1;
+ }
+ qemu_opts_del(opts);
+ return fd;
+}
Code Review / kvmfornfv.git / blobdiff