diff options
| -rw-r--r-- | util/qemu-sockets.c | 154 |
1 files changed, 97 insertions, 57 deletions
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c index da549b6908..eda99be8be 100644 --- a/util/qemu-sockets.c +++ b/util/qemu-sockets.c @@ -114,36 +114,78 @@ NetworkAddressFamily inet_netfamily(int family) return NETWORK_ADDRESS_FAMILY_UNKNOWN; } -static int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp) +/* + * Matrix we're trying to apply + * + * ipv4 ipv6 family + * - - PF_UNSPEC + * - f PF_INET + * - t PF_INET6 + * f - PF_INET6 + * f f <error> + * f t PF_INET6 + * t - PF_INET + * t f PF_INET + * t t PF_INET6 + * + * NB, this matrix is only about getting the neccessary results + * from getaddrinfo(). Some of the cases require further work + * after reading results from getaddrinfo in order to fully + * apply the logic the end user wants. eg with the last case + * ipv4=t + ipv6=t + PF_INET6, getaddrinfo alone can only + * guarantee the ipv6=t part of the request - we need more + * checks to provide ipv4=t part of the guarantee. This is + * outside scope of this method and not currently handled by + * callers at all. + */ +static int inet_ai_family_from_address(InetSocketAddress *addr, + Error **errp) +{ + if (addr->has_ipv6 && addr->has_ipv4 && + !addr->ipv6 && !addr->ipv4) { + error_setg(errp, "Cannot disable IPv4 and IPv6 at same time"); + return PF_UNSPEC; + } + if ((addr->has_ipv6 && addr->ipv6) || (addr->has_ipv4 && !addr->ipv4)) { + return PF_INET6; + } + if ((addr->has_ipv4 && addr->ipv4) || (addr->has_ipv6 && !addr->ipv6)) { + return PF_INET; + } + return PF_UNSPEC; +} + +static int inet_listen_saddr(InetSocketAddress *saddr, + int port_offset, + bool update_addr, + 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; + int slisten, rc, port_min, port_max, p; + Error *err = NULL; memset(&ai,0, sizeof(ai)); ai.ai_flags = AI_PASSIVE; - ai.ai_family = PF_UNSPEC; + ai.ai_family = inet_ai_family_from_address(saddr, &err); ai.ai_socktype = SOCK_STREAM; - if ((qemu_opt_get(opts, "host") == NULL)) { + if (err) { + error_propagate(errp, err); + return -1; + } + + if (saddr->host == NULL) { error_setg(errp, "host not specified"); return -1; } - if (qemu_opt_get(opts, "port") != NULL) { - pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port")); + if (saddr->port != NULL) { + pstrcpy(port, sizeof(port), saddr->port); } else { port[0] = '\0'; } - 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) { @@ -163,11 +205,11 @@ static int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp) } snprintf(port, sizeof(port), "%d", (int)baseport + port_offset); } - rc = getaddrinfo(strlen(addr) ? addr : NULL, + rc = getaddrinfo(strlen(saddr->host) ? saddr->host : NULL, strlen(port) ? port : NULL, &ai, &res); if (rc != 0) { - error_setg(errp, "address resolution failed for %s:%s: %s", addr, port, - gai_strerror(rc)); + error_setg(errp, "address resolution failed for %s:%s: %s", + saddr->host, port, gai_strerror(rc)); return -1; } @@ -195,7 +237,7 @@ static int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp) #endif port_min = inet_getport(e); - port_max = to ? to + port_offset : port_min; + port_max = saddr->has_to ? saddr->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) { @@ -219,13 +261,15 @@ listen: 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); + if (update_addr) { + g_free(saddr->host); + saddr->host = g_strdup(uaddr); + g_free(saddr->port); + saddr->port = g_strdup_printf("%d", + inet_getport(e) - port_offset); + saddr->has_ipv6 = saddr->ipv6 = e->ai_family == PF_INET6; + saddr->has_ipv4 = saddr->ipv4 = e->ai_family != PF_INET6; + } freeaddrinfo(res); return slisten; } @@ -617,32 +661,28 @@ static void inet_addr_to_opts(QemuOpts *opts, const InetSocketAddress *addr) 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); + sock = inet_listen_saddr(addr, port_offset, true, errp); if (sock != -1 && ostr) { optstr = strchr(str, ','); - if (qemu_opt_get_bool(opts, "ipv6", 0)) { + if (addr->ipv6) { snprintf(ostr, olen, "[%s]:%s%s", - qemu_opt_get(opts, "host"), - qemu_opt_get(opts, "port"), + addr->host, + addr->port, optstr ? optstr : ""); } else { snprintf(ostr, olen, "%s:%s%s", - qemu_opt_get(opts, "host"), - qemu_opt_get(opts, "port"), + addr->host, + addr->port, optstr ? optstr : ""); } } - qemu_opts_del(opts); + qapi_free_InetSocketAddress(addr); } return sock; } @@ -708,10 +748,11 @@ int inet_nonblocking_connect(const char *str, #ifndef _WIN32 -static int unix_listen_opts(QemuOpts *opts, Error **errp) +static int unix_listen_saddr(UnixSocketAddress *saddr, + bool update_addr, + 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); @@ -722,8 +763,8 @@ static int unix_listen_opts(QemuOpts *opts, Error **errp) memset(&un, 0, sizeof(un)); un.sun_family = AF_UNIX; - if (path && strlen(path)) { - snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); + if (saddr->path && strlen(saddr->path)) { + snprintf(un.sun_path, sizeof(un.sun_path), "%s", saddr->path); } else { const char *tmpdir = getenv("TMPDIR"); tmpdir = tmpdir ? tmpdir : "/tmp"; @@ -748,7 +789,10 @@ static int unix_listen_opts(QemuOpts *opts, Error **errp) goto err; } close(fd); - qemu_opt_set(opts, "path", un.sun_path, &error_abort); + if (update_addr) { + g_free(saddr->path); + saddr->path = g_strdup(un.sun_path); + } } if (unlink(un.sun_path) < 0 && errno != ENOENT) { @@ -832,7 +876,9 @@ static int unix_connect_opts(QemuOpts *opts, Error **errp, #else -static int unix_listen_opts(QemuOpts *opts, Error **errp) +static int unix_listen_saddr(UnixSocketAddress *saddr, + bool update_addr, + Error **errp) { error_setg(errp, "unix sockets are not available on windows"); errno = ENOTSUP; @@ -851,11 +897,11 @@ static int unix_connect_opts(QemuOpts *opts, Error **errp, /* compatibility wrapper */ int unix_listen(const char *str, char *ostr, int olen, Error **errp) { - QemuOpts *opts; char *path, *optstr; int sock, len; + UnixSocketAddress *saddr; - opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort); + saddr = g_new0(UnixSocketAddress, 1); optstr = strchr(str, ','); if (optstr) { @@ -863,18 +909,17 @@ int unix_listen(const char *str, char *ostr, int olen, Error **errp) 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); + saddr->path = path; } } else { - qemu_opt_set(opts, "path", str, &error_abort); + saddr->path = g_strdup(str); } - sock = unix_listen_opts(opts, errp); + sock = unix_listen_saddr(saddr, true, errp); if (sock != -1 && ostr) - snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : ""); - qemu_opts_del(opts); + snprintf(ostr, olen, "%s%s", saddr->path, optstr ? optstr : ""); + qapi_free_UnixSocketAddress(saddr); return sock; } @@ -979,19 +1024,15 @@ int socket_connect(SocketAddress *addr, Error **errp, int socket_listen(SocketAddress *addr, Error **errp) { - QemuOpts *opts; int fd; - opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort); switch (addr->type) { case SOCKET_ADDRESS_KIND_INET: - inet_addr_to_opts(opts, addr->u.inet); - fd = inet_listen_opts(opts, 0, errp); + fd = inet_listen_saddr(addr->u.inet, 0, false, errp); break; case SOCKET_ADDRESS_KIND_UNIX: - qemu_opt_set(opts, "path", addr->u.q_unix->path, &error_abort); - fd = unix_listen_opts(opts, errp); + fd = unix_listen_saddr(addr->u.q_unix, false, errp); break; case SOCKET_ADDRESS_KIND_FD: @@ -1001,7 +1042,6 @@ int socket_listen(SocketAddress *addr, Error **errp) default: abort(); } - qemu_opts_del(opts); return fd; } |