/* * 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 static const int on=1, off=0; /* 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 = "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; } } const char *inet_strfamily(int family) { switch (family) { case PF_INET6: return "ipv6"; case PF_INET: return "ipv4"; case PF_UNIX: return "unix"; } return "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_ADDRCONFIG; 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) snprintf(port, sizeof(port), "%d", atoi(port) + 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_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); } continue; } qemu_setsockopt(slisten, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); #ifdef IPV6_V6ONLY if (e->ai_family == PF_INET6) { /* listen on both ipv4 and ipv6 */ 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_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); } } } closesocket(slisten); } freeaddrinfo(res); return -1; listen: if (listen(slisten,1) != 0) { error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED); closesocket(slisten); freeaddrinfo(res); return -1; } 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 = 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; } /* 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) { 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_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 (error_is_set(errp)) { error_free(*errp); *errp = NULL; } 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 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_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_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); goto err; } qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &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 */ InetSocketAddress *inet_parse(const char *str, Error **errp) { InetSocketAddress *addr; const char *optstr, *h; char host[64]; 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); qemu_opt_set_bool(opts, "ipv6", ipv6); } if (addr->has_to) { char to[20]; snprintf(to, sizeof(to), "%d", addr->to); qemu_opt_set(opts, "to", to); } qemu_opt_set(opts, "host", addr->host); qemu_opt_set(opts, "port", addr->port); } 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_nofail(&socket_optslist); 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_nofail(&socket_optslist); 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_nofail(&socket_optslist); 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_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); 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 { char *tmpdir = getenv("TMPDIR"); snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX", tmpdir ? tmpdir : "/tmp"); /* * 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); close(fd); qemu_opt_set(opts, "path", un.sun_path); } unlink(un.sun_path); if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) { error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); goto err; } if (listen(sock, 1) < 0) { error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED); 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 (NULL == path) { error_setg(errp, "unix connect: no path specified"); return -1; } sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0); if (sock < 0) { error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); 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_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) { error_set_errno(errp, -rc, QERR_SOCKET_CONNECT_FAILED); 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_nofail(&socket_optslist); 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_nofail(&socket_optslist); 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_nofail(&socket_optslist); qemu_opt_set(opts, "path", path); 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_nofail(&socket_optslist); 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); 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, 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_nofail(&socket_optslist); 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); 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_nofail(&socket_optslist); switch (remote->kind) { case SOCKET_ADDRESS_KIND_INET: qemu_opt_set(opts, "host", remote->inet->host); qemu_opt_set(opts, "port", remote->inet->port); if (local) { qemu_opt_set(opts, "localaddr", local->inet->host); qemu_opt_set(opts, "localport", local->inet->port); } fd = inet_dgram_opts(opts, errp); break; default: error_setg(errp, "socket type unsupported for datagram"); fd = -1; } qemu_opts_del(opts); return fd; }