--- /dev/null
+/*
+ * BabelTrace - LTTng live Output
+ *
+ * Copyright 2013 Julien Desfossez <jdesfossez@efficios.com>
+ * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <babeltrace/ctf-text/types.h>
+#include <babeltrace/format.h>
+#include <babeltrace/babeltrace-internal.h>
+#include <inttypes.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <glib.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "lttng-live.h"
+
+/*
+ * hostname parameter needs to hold NAME_MAX chars.
+ */
+static
+int parse_url(const char *path, struct lttng_live_ctx *ctx)
+{
+ char remain[3][NAME_MAX];
+ int ret = -1, proto, proto_offset = 0;
+ size_t path_len = strlen(path);
+
+ /*
+ * Since sscanf API does not allow easily checking string length
+ * against a size defined by a macro. Test it beforehand on the
+ * input. We know the output is always <= than the input length.
+ */
+ if (path_len > NAME_MAX) {
+ goto end;
+ }
+ ret = sscanf(path, "net%d://", &proto);
+ if (ret < 1) {
+ proto = 4;
+ /* net:// */
+ proto_offset = strlen("net://");
+ } else {
+ /* net4:// or net6:// */
+ proto_offset = strlen("netX://");
+ }
+ if (proto_offset > path_len) {
+ goto end;
+ }
+ /* TODO : parse for IPv6 as well */
+ /* Parse the hostname or IP */
+ ret = sscanf(&path[proto_offset], "%[a-zA-Z.0-9%-]%s",
+ ctx->relay_hostname, remain[0]);
+ if (ret == 2) {
+ /* Optional port number */
+ switch (remain[0][0]) {
+ case ':':
+ ret = sscanf(remain[0], ":%d%s", &ctx->port, remain[1]);
+ /* Optional session ID with port number */
+ if (ret == 2) {
+ ret = sscanf(remain[1], "/%s", remain[2]);
+ /* Accept 0 or 1 (optional) */
+ if (ret < 0) {
+ goto end;
+ }
+ }
+ break;
+ case '/':
+ /* Optional session ID */
+ ret = sscanf(remain[0], "/%s", remain[2]);
+ /* Accept 0 or 1 (optional) */
+ if (ret < 0) {
+ goto end;
+ }
+ break;
+ default:
+ fprintf(stderr, "[error] wrong delimitor : %c\n",
+ remain[0][0]);
+ ret = -1;
+ goto end;
+ }
+ }
+
+ if (ctx->port < 0)
+ ctx->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT;
+
+ if (strlen(remain[2]) == 0) {
+ printf_verbose("Connecting to hostname : %s, port : %d, "
+ "proto : IPv%d\n",
+ ctx->relay_hostname, ctx->port, proto);
+ ret = 0;
+ goto end;
+ }
+ ret = sscanf(remain[2], "host/%[a-zA-Z.0-9%-]/%s",
+ ctx->traced_hostname, ctx->session_name);
+ if (ret != 2) {
+ fprintf(stderr, "[error] Format : "
+ "net://<hostname>/host/<traced_hostname>/<session_name>\n");
+ goto end;
+ }
+
+ printf_verbose("Connecting to hostname : %s, port : %d, "
+ "traced hostname : %s, session name : %s, "
+ "proto : IPv%d\n",
+ ctx->relay_hostname, ctx->port, ctx->traced_hostname,
+ ctx->session_name, proto);
+ ret = 0;
+
+end:
+ return ret;
+}
+
+static int lttng_live_open_trace_read(const char *path)
+{
+ int ret = 0;
+ struct lttng_live_ctx *ctx;
+
+ ctx = g_new0(struct lttng_live_ctx, 1);
+ ctx->session = g_new0(struct lttng_live_session, 1);
+
+ /* We need a pointer to the context from the packet_seek function. */
+ ctx->session->ctx = ctx;
+
+ /* HT to store the CTF traces. */
+ ctx->session->ctf_traces = g_hash_table_new(g_direct_hash,
+ g_direct_equal);
+ ctx->port = -1;
+ ctx->session_ids = g_array_new(FALSE, TRUE, sizeof(uint64_t));
+
+ ret = parse_url(path, ctx);
+ if (ret < 0) {
+ goto end_free;
+ }
+
+ ret = lttng_live_connect_viewer(ctx);
+ if (ret < 0) {
+ fprintf(stderr, "[error] Connection failed\n");
+ goto end_free;
+ }
+ printf_verbose("LTTng-live connected to relayd\n");
+
+ ret = lttng_live_establish_connection(ctx);
+ if (ret < 0) {
+ goto end_free;
+ }
+
+ printf_verbose("Listing sessions\n");
+ ret = lttng_live_list_sessions(ctx, path);
+ if (ret < 0) {
+ fprintf(stderr, "[error] List error\n");
+ goto end_free;
+ }
+
+ if (ctx->session_ids->len > 0)
+ lttng_live_read(ctx);
+
+end_free:
+ g_hash_table_destroy(ctx->session->ctf_traces);
+ g_free(ctx->session);
+ g_free(ctx->session->streams);
+ g_free(ctx);
+ return ret;
+}
+
+static
+struct bt_trace_descriptor *lttng_live_open_trace(const char *path, int flags,
+ void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
+ int whence), FILE *metadata_fp)
+{
+ struct ctf_text_stream_pos *pos;
+
+ switch (flags & O_ACCMODE) {
+ case O_RDONLY:
+ /* OK */
+ break;
+ case O_RDWR:
+ fprintf(stderr, "[error] lttng live plugin cannot be used as output plugin.\n");
+ goto error;
+ default:
+ fprintf(stderr, "[error] Incorrect open flags.\n");
+ goto error;
+ }
+
+ pos = g_new0(struct ctf_text_stream_pos, 1);
+ pos->parent.rw_table = NULL;
+ pos->parent.event_cb = NULL;
+ pos->parent.trace = &pos->trace_descriptor;
+ lttng_live_open_trace_read(path);
+ return &pos->trace_descriptor;
+
+error:
+ return NULL;
+}
+
+static
+int lttng_live_close_trace(struct bt_trace_descriptor *td)
+{
+ struct ctf_text_stream_pos *pos =
+ container_of(td, struct ctf_text_stream_pos,
+ trace_descriptor);
+ free(pos);
+ return 0;
+}
+
+static
+struct bt_format lttng_live_format = {
+ .open_trace = lttng_live_open_trace,
+ .close_trace = lttng_live_close_trace,
+};
+
+static
+void __attribute__((constructor)) lttng_live_init(void)
+{
+ int ret;
+
+ lttng_live_format.name = g_quark_from_static_string("lttng-live");
+ ret = bt_register_format(<tng_live_format);
+ assert(!ret);
+}
+
+static
+void __attribute__((destructor)) lttng_live_exit(void)
+{
+ bt_unregister_format(<tng_live_format);
+}
projects / babeltrace.git / blobdiff