diff options
Diffstat (limited to 'util/qemu-sockets.c')
| -rw-r--r-- | util/qemu-sockets.c | 970 |
1 files changed, 970 insertions, 0 deletions
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c new file mode 100644 index 0000000000..3537bf3d45 --- /dev/null +++ b/util/qemu-sockets.c @@ -0,0 +1,970 @@ +/* + * 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-common.h" /* for qemu_isdigit */ +#include "qemu/main-loop.h" + +#ifndef AI_ADDRCONFIG +# define AI_ADDRCONFIG 0 +#endif + +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; + 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; + } + + setsockopt(slisten,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on)); +#ifdef IPV6_V6ONLY + if (e->ai_family == PF_INET6) { + /* listen on both ipv4 and ipv6 */ + setsockopt(slisten,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&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 = 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 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; + } + 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 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 if (qemu_isdigit(str[0])) { + /* IPv4 addr */ + if (2 != sscanf(str, "%64[0-9.]:%32[^,]%n", host, port, &pos)) { + error_setg(errp, "error parsing IPv4 address '%s'", str); + goto fail; + } + addr->ipv4 = addr->has_ipv4 = true; + } else { + /* hostname */ + if (2 != sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos)) { + error_setg(errp, "error parsing address '%s'", str); + goto fail; + } + } + + 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, 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(&dummy_opts); + 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(&dummy_opts); + 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(&dummy_opts); + 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\n"); + 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; + socket_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(&dummy_opts); + + 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(&dummy_opts); + 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(&dummy_opts); + 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 = NULL; + + addr = g_new(SocketAddress, 1); + if (strstart(str, "unix:", NULL)) { + if (str[5] == '\0') { + error_setg(errp, "invalid Unix socket address\n"); + 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\n"); + 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 = g_new(InetSocketAddress, 1); + 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(&dummy_opts); + 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 (callback) { + 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(&dummy_opts); + 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; +} + +#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; +} |