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Mon, 20 Dec 2021 15:44:28 +0000 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org Cc: kraxel@redhat.com, armbru@redhat.com, eblake@redhat.com, pbonzini@redhat.com, marcandre.lureau@redhat.com, vsementsov@virtuozzo.com Subject: [PATCH 1/2] ui/vnc: refactor arrays of addresses to SocketAddressList Date: Mon, 20 Dec 2021 16:44:17 +0100 Message-Id: <20211220154418.1554279-2-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211220154418.1554279-1-vsementsov@virtuozzo.com> References: <20211220154418.1554279-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: AM6PR0202CA0055.eurprd02.prod.outlook.com (2603:10a6:20b:3a::32) To DB9PR08MB6748.eurprd08.prod.outlook.com (2603:10a6:10:2a7::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 8ad09b9e-9688-44cc-3203-08d9c3cf9b59 X-MS-TrafficTypeDiagnostic: DB9PR08MB6667:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:454; 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envelope-from=vsementsov@virtuozzo.com; helo=EUR05-VI1-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Let's use SocketAddressList instead of dynamic arrays. Benefits: - Automatic cleanup: don't need specific freeing function and drop some gotos. - Less indirection: no triple asterix anymore! - Prepare for the following commit, which will reuse new interface of vnc_display_listen(). Signed-off-by: Vladimir Sementsov-Ogievskiy --- ui/vnc.c | 129 ++++++++++++++++++++++--------------------------------- 1 file changed, 51 insertions(+), 78 deletions(-) diff --git a/ui/vnc.c b/ui/vnc.c index af02522e84..c9e26c70df 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -3812,30 +3812,19 @@ static int vnc_display_get_address(const char *addrstr, return ret; } -static void vnc_free_addresses(SocketAddress ***retsaddr, - size_t *retnsaddr) -{ - size_t i; - - for (i = 0; i < *retnsaddr; i++) { - qapi_free_SocketAddress((*retsaddr)[i]); - } - g_free(*retsaddr); - - *retsaddr = NULL; - *retnsaddr = 0; -} - static int vnc_display_get_addresses(QemuOpts *opts, bool reverse, - SocketAddress ***retsaddr, - size_t *retnsaddr, - SocketAddress ***retwsaddr, - size_t *retnwsaddr, + SocketAddressList **saddr_list_ret, + SocketAddressList **wsaddr_list_ret, Error **errp) { SocketAddress *saddr = NULL; SocketAddress *wsaddr = NULL; + g_autoptr(SocketAddressList) saddr_list = NULL; + SocketAddressList **saddr_tail = &saddr_list; + SocketAddress *single_saddr = NULL; + g_autoptr(SocketAddressList) wsaddr_list = NULL; + SocketAddressList **wsaddr_tail = &wsaddr_list; QemuOptsIter addriter; const char *addr; int to = qemu_opt_get_number(opts, "to", 0); @@ -3844,23 +3833,16 @@ static int vnc_display_get_addresses(QemuOpts *opts, bool ipv4 = qemu_opt_get_bool(opts, "ipv4", false); bool ipv6 = qemu_opt_get_bool(opts, "ipv6", false); int displaynum = -1; - int ret = -1; - - *retsaddr = NULL; - *retnsaddr = 0; - *retwsaddr = NULL; - *retnwsaddr = 0; addr = qemu_opt_get(opts, "vnc"); if (addr == NULL || g_str_equal(addr, "none")) { - ret = 0; - goto cleanup; + return 0; } if (qemu_opt_get(opts, "websocket") && !qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) { error_setg(errp, "SHA1 hash support is required for websockets"); - goto cleanup; + return -1; } qemu_opt_iter_init(&addriter, opts, "vnc"); @@ -3871,7 +3853,7 @@ static int vnc_display_get_addresses(QemuOpts *opts, ipv4, ipv6, &saddr, errp); if (rv < 0) { - goto cleanup; + return -1; } /* Historical compat - first listen address can be used * to set the default websocket port @@ -3879,13 +3861,16 @@ static int vnc_display_get_addresses(QemuOpts *opts, if (displaynum == -1) { displaynum = rv; } - *retsaddr = g_renew(SocketAddress *, *retsaddr, *retnsaddr + 1); - (*retsaddr)[(*retnsaddr)++] = saddr; + QAPI_LIST_APPEND(saddr_tail, saddr); } - /* If we had multiple primary displays, we don't do defaults - * for websocket, and require explicit config instead. */ - if (*retnsaddr > 1) { + if (saddr_list && !saddr_list->next) { + single_saddr = saddr_list->value; + } else { + /* + * If we had multiple primary displays, we don't do defaults + * for websocket, and require explicit config instead. + */ displaynum = -1; } @@ -3895,57 +3880,50 @@ static int vnc_display_get_addresses(QemuOpts *opts, has_ipv4, has_ipv6, ipv4, ipv6, &wsaddr, errp) < 0) { - goto cleanup; + return -1; } /* Historical compat - if only a single listen address was * provided, then this is used to set the default listen * address for websocket too */ - if (*retnsaddr == 1 && - (*retsaddr)[0]->type == SOCKET_ADDRESS_TYPE_INET && + if (single_saddr && + single_saddr->type == SOCKET_ADDRESS_TYPE_INET && wsaddr->type == SOCKET_ADDRESS_TYPE_INET && g_str_equal(wsaddr->u.inet.host, "") && - !g_str_equal((*retsaddr)[0]->u.inet.host, "")) { + !g_str_equal(single_saddr->u.inet.host, "")) { g_free(wsaddr->u.inet.host); - wsaddr->u.inet.host = g_strdup((*retsaddr)[0]->u.inet.host); + wsaddr->u.inet.host = g_strdup(single_saddr->u.inet.host); } - *retwsaddr = g_renew(SocketAddress *, *retwsaddr, *retnwsaddr + 1); - (*retwsaddr)[(*retnwsaddr)++] = wsaddr; + QAPI_LIST_APPEND(wsaddr_tail, wsaddr); } - ret = 0; - cleanup: - if (ret < 0) { - vnc_free_addresses(retsaddr, retnsaddr); - vnc_free_addresses(retwsaddr, retnwsaddr); - } - return ret; + *saddr_list_ret = g_steal_pointer(&saddr_list); + *wsaddr_list_ret = g_steal_pointer(&wsaddr_list); + return 0; } static int vnc_display_connect(VncDisplay *vd, - SocketAddress **saddr, - size_t nsaddr, - SocketAddress **wsaddr, - size_t nwsaddr, + SocketAddressList *saddr_list, + SocketAddressList *wsaddr_list, Error **errp) { /* connect to viewer */ QIOChannelSocket *sioc = NULL; - if (nwsaddr != 0) { + if (wsaddr_list) { error_setg(errp, "Cannot use websockets in reverse mode"); return -1; } - if (nsaddr != 1) { + if (!saddr_list || saddr_list->next) { error_setg(errp, "Expected a single address in reverse mode"); return -1; } /* TODO SOCKET_ADDRESS_TYPE_FD when fd has AF_UNIX */ - vd->is_unix = saddr[0]->type == SOCKET_ADDRESS_TYPE_UNIX; + vd->is_unix = saddr_list->value->type == SOCKET_ADDRESS_TYPE_UNIX; sioc = qio_channel_socket_new(); qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse"); - if (qio_channel_socket_connect_sync(sioc, saddr[0], errp) < 0) { + if (qio_channel_socket_connect_sync(sioc, saddr_list->value, errp) < 0) { object_unref(OBJECT(sioc)); return -1; } @@ -3956,20 +3934,18 @@ static int vnc_display_connect(VncDisplay *vd, static int vnc_display_listen(VncDisplay *vd, - SocketAddress **saddr, - size_t nsaddr, - SocketAddress **wsaddr, - size_t nwsaddr, + SocketAddressList *saddr_list, + SocketAddressList *wsaddr_list, Error **errp) { - size_t i; + SocketAddressList *el; - if (nsaddr) { + if (saddr_list) { vd->listener = qio_net_listener_new(); qio_net_listener_set_name(vd->listener, "vnc-listen"); - for (i = 0; i < nsaddr; i++) { + for (el = saddr_list; el; el = el->next) { if (qio_net_listener_open_sync(vd->listener, - saddr[i], 1, + el->value, 1, errp) < 0) { return -1; } @@ -3979,12 +3955,12 @@ static int vnc_display_listen(VncDisplay *vd, vnc_listen_io, vd, NULL); } - if (nwsaddr) { + if (wsaddr_list) { vd->wslistener = qio_net_listener_new(); qio_net_listener_set_name(vd->wslistener, "vnc-ws-listen"); - for (i = 0; i < nwsaddr; i++) { + for (el = wsaddr_list; el; el = el->next) { if (qio_net_listener_open_sync(vd->wslistener, - wsaddr[i], 1, + el->value, 1, errp) < 0) { return -1; } @@ -4002,8 +3978,8 @@ void vnc_display_open(const char *id, Error **errp) { VncDisplay *vd = vnc_display_find(id); QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id); - SocketAddress **saddr = NULL, **wsaddr = NULL; - size_t nsaddr, nwsaddr; + g_autoptr(SocketAddressList) saddr_list = NULL; + g_autoptr(SocketAddressList) wsaddr_list = NULL; const char *share, *device_id; QemuConsole *con; bool password = false; @@ -4028,8 +4004,8 @@ void vnc_display_open(const char *id, Error **errp) } reverse = qemu_opt_get_bool(opts, "reverse", false); - if (vnc_display_get_addresses(opts, reverse, &saddr, &nsaddr, - &wsaddr, &nwsaddr, errp) < 0) { + if (vnc_display_get_addresses(opts, reverse, &saddr_list, &wsaddr_list, + errp) < 0) { goto fail; } @@ -4211,16 +4187,16 @@ void vnc_display_open(const char *id, Error **errp) } qkbd_state_set_delay(vd->kbd, key_delay_ms); - if (saddr == NULL) { - goto cleanup; + if (saddr_list == NULL) { + return; } if (reverse) { - if (vnc_display_connect(vd, saddr, nsaddr, wsaddr, nwsaddr, errp) < 0) { + if (vnc_display_connect(vd, saddr_list, wsaddr_list, errp) < 0) { goto fail; } } else { - if (vnc_display_listen(vd, saddr, nsaddr, wsaddr, nwsaddr, errp) < 0) { + if (vnc_display_listen(vd, saddr_list, wsaddr_list, errp) < 0) { goto fail; } } @@ -4229,14 +4205,11 @@ void vnc_display_open(const char *id, Error **errp) vnc_display_print_local_addr(vd); } - cleanup: - vnc_free_addresses(&saddr, &nsaddr); - vnc_free_addresses(&wsaddr, &nwsaddr); + /* Success */ return; fail: vnc_display_close(vd); - goto cleanup; } void vnc_display_add_client(const char *id, int csock, bool skipauth) -- 2.31.1