+static void
+cmd_help(char **tokens, uint32_t n_tokens, char *out, size_t out_size)
+{
+ tokens++;
+ n_tokens--;
+
+ if (n_tokens == 0) {
+ snprintf(out, out_size,
+ "Type 'help <command>' for details on each command.\n\n"
+ "List of commands:\n"
+ "\tmempool\n"
+ "\tlink\n"
+ "\tswq\n"
+ "\ttmgr subport profile\n"
+ "\ttmgr pipe profile\n"
+ "\ttmgr\n"
+ "\ttmgr subport\n"
+ "\ttmgr subport pipe\n"
+ "\ttap\n"
+ "\tkni\n"
+ "\tport in action profile\n"
+ "\ttable action profile\n"
+ "\tpipeline\n"
+ "\tpipeline port in\n"
+ "\tpipeline port out\n"
+ "\tpipeline table\n"
+ "\tpipeline port in table\n"
+ "\tpipeline port in stats\n"
+ "\tpipeline port in enable\n"
+ "\tpipeline port in disable\n"
+ "\tpipeline port out stats\n"
+ "\tpipeline table stats\n"
+ "\tpipeline table rule add\n"
+ "\tpipeline table rule add default\n"
+ "\tpipeline table rule add bulk\n"
+ "\tpipeline table rule delete\n"
+ "\tpipeline table rule delete default\n"
+ "\tpipeline table rule stats read\n"
+ "\tpipeline table meter profile add\n"
+ "\tpipeline table meter profile delete\n"
+ "\tpipeline table rule meter read\n"
+ "\tpipeline table dscp\n"
+ "\tpipeline table rule ttl read\n"
+ "\tthread pipeline enable\n"
+ "\tthread pipeline disable\n\n");
+ return;
+ }
+
+ if (strcmp(tokens[0], "mempool") == 0) {
+ snprintf(out, out_size, "\n%s\n", cmd_mempool_help);
+ return;
+ }
+
+ if (strcmp(tokens[0], "link") == 0) {
+ snprintf(out, out_size, "\n%s\n", cmd_link_help);
+ return;
+ }
+
+ if (strcmp(tokens[0], "swq") == 0) {
+ snprintf(out, out_size, "\n%s\n", cmd_swq_help);
+ return;
+ }
+
+ if (strcmp(tokens[0], "tmgr") == 0) {
+ if (n_tokens == 1) {
+ snprintf(out, out_size, "\n%s\n", cmd_tmgr_help);
+ return;
+ }
+
+ if ((n_tokens == 2) &&
+ (strcmp(tokens[1], "subport")) == 0) {
+ snprintf(out, out_size, "\n%s\n", cmd_tmgr_subport_help);
+ return;
+ }
+
+ if ((n_tokens == 3) &&
+ (strcmp(tokens[1], "subport") == 0) &&
+ (strcmp(tokens[2], "profile") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_tmgr_subport_profile_help);
+ return;
+ }
+
+ if ((n_tokens == 3) &&
+ (strcmp(tokens[1], "subport") == 0) &&
+ (strcmp(tokens[2], "pipe") == 0)) {
+ snprintf(out, out_size, "\n%s\n", cmd_tmgr_subport_pipe_help);
+ return;
+ }
+
+ if ((n_tokens == 3) &&
+ (strcmp(tokens[1], "pipe") == 0) &&
+ (strcmp(tokens[2], "profile") == 0)) {
+ snprintf(out, out_size, "\n%s\n", cmd_tmgr_pipe_profile_help);
+ return;
+ }
+ }
+
+ if (strcmp(tokens[0], "tap") == 0) {
+ snprintf(out, out_size, "\n%s\n", cmd_tap_help);
+ return;
+ }
+
+ if (strcmp(tokens[0], "kni") == 0) {
+ snprintf(out, out_size, "\n%s\n", cmd_kni_help);
+ return;
+ }
+
+ if ((n_tokens == 4) &&
+ (strcmp(tokens[0], "port") == 0) &&
+ (strcmp(tokens[1], "in") == 0) &&
+ (strcmp(tokens[2], "action") == 0) &&
+ (strcmp(tokens[3], "profile") == 0)) {
+ snprintf(out, out_size, "\n%s\n", cmd_port_in_action_profile_help);
+ return;
+ }
+
+ if ((n_tokens == 3) &&
+ (strcmp(tokens[0], "table") == 0) &&
+ (strcmp(tokens[1], "action") == 0) &&
+ (strcmp(tokens[2], "profile") == 0)) {
+ snprintf(out, out_size, "\n%s\n", cmd_table_action_profile_help);
+ return;
+ }
+
+ if ((strcmp(tokens[0], "pipeline") == 0) && (n_tokens == 1)) {
+ snprintf(out, out_size, "\n%s\n", cmd_pipeline_help);
+ return;
+ }
+
+ if ((strcmp(tokens[0], "pipeline") == 0) &&
+ (strcmp(tokens[1], "port") == 0)) {
+ if ((n_tokens == 3) && (strcmp(tokens[2], "in")) == 0) {
+ snprintf(out, out_size, "\n%s\n", cmd_pipeline_port_in_help);
+ return;
+ }
+
+ if ((n_tokens == 3) && (strcmp(tokens[2], "out")) == 0) {
+ snprintf(out, out_size, "\n%s\n", cmd_pipeline_port_out_help);
+ return;
+ }
+
+ if ((n_tokens == 4) &&
+ (strcmp(tokens[2], "in") == 0) &&
+ (strcmp(tokens[3], "table") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_port_in_table_help);
+ return;
+ }
+
+ if ((n_tokens == 4) &&
+ (strcmp(tokens[2], "in") == 0) &&
+ (strcmp(tokens[3], "stats") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_port_in_stats_help);
+ return;
+ }
+
+ if ((n_tokens == 4) &&
+ (strcmp(tokens[2], "in") == 0) &&
+ (strcmp(tokens[3], "enable") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_port_in_enable_help);
+ return;
+ }
+
+ if ((n_tokens == 4) &&
+ (strcmp(tokens[2], "in") == 0) &&
+ (strcmp(tokens[3], "disable") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_port_in_disable_help);
+ return;
+ }
+
+ if ((n_tokens == 4) &&
+ (strcmp(tokens[2], "out") == 0) &&
+ (strcmp(tokens[3], "stats") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_port_out_stats_help);
+ return;
+ }
+ }
+
+ if ((strcmp(tokens[0], "pipeline") == 0) &&
+ (strcmp(tokens[1], "table") == 0)) {
+ if (n_tokens == 2) {
+ snprintf(out, out_size, "\n%s\n", cmd_pipeline_table_help);
+ return;
+ }
+
+ if ((n_tokens == 3) && strcmp(tokens[2], "stats") == 0) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_stats_help);
+ return;
+ }
+
+ if ((n_tokens == 3) && strcmp(tokens[2], "dscp") == 0) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_dscp_help);
+ return;
+ }
+
+ if ((n_tokens == 4) &&
+ (strcmp(tokens[2], "rule") == 0) &&
+ (strcmp(tokens[3], "add") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_rule_add_help);
+ return;
+ }
+
+ if ((n_tokens == 5) &&
+ (strcmp(tokens[2], "rule") == 0) &&
+ (strcmp(tokens[3], "add") == 0) &&
+ (strcmp(tokens[4], "default") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_rule_add_default_help);
+ return;
+ }
+
+ if ((n_tokens == 5) &&
+ (strcmp(tokens[2], "rule") == 0) &&
+ (strcmp(tokens[3], "add") == 0) &&
+ (strcmp(tokens[4], "bulk") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_rule_add_bulk_help);
+ return;
+ }
+
+ if ((n_tokens == 4) &&
+ (strcmp(tokens[2], "rule") == 0) &&
+ (strcmp(tokens[3], "delete") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_rule_delete_help);
+ return;
+ }
+
+ if ((n_tokens == 5) &&
+ (strcmp(tokens[2], "rule") == 0) &&
+ (strcmp(tokens[3], "delete") == 0) &&
+ (strcmp(tokens[4], "default") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_rule_delete_default_help);
+ return;
+ }
+
+ if ((n_tokens == 5) &&
+ (strcmp(tokens[2], "rule") == 0) &&
+ (strcmp(tokens[3], "stats") == 0) &&
+ (strcmp(tokens[4], "read") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_rule_stats_read_help);
+ return;
+ }
+
+ if ((n_tokens == 5) &&
+ (strcmp(tokens[2], "meter") == 0) &&
+ (strcmp(tokens[3], "profile") == 0) &&
+ (strcmp(tokens[4], "add") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_meter_profile_add_help);
+ return;
+ }
+
+ if ((n_tokens == 5) &&
+ (strcmp(tokens[2], "meter") == 0) &&
+ (strcmp(tokens[3], "profile") == 0) &&
+ (strcmp(tokens[4], "delete") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_meter_profile_delete_help);
+ return;
+ }
+
+ if ((n_tokens == 5) &&
+ (strcmp(tokens[2], "rule") == 0) &&
+ (strcmp(tokens[3], "meter") == 0) &&
+ (strcmp(tokens[4], "read") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_rule_meter_read_help);
+ return;
+ }
+
+ if ((n_tokens == 5) &&
+ (strcmp(tokens[2], "rule") == 0) &&
+ (strcmp(tokens[3], "ttl") == 0) &&
+ (strcmp(tokens[4], "read") == 0)) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_pipeline_table_rule_ttl_read_help);
+ return;
+ }
+ }
+
+ if ((n_tokens == 3) &&
+ (strcmp(tokens[0], "thread") == 0) &&
+ (strcmp(tokens[1], "pipeline") == 0)) {
+ if (strcmp(tokens[2], "enable") == 0) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_thread_pipeline_enable_help);
+ return;
+ }
+
+ if (strcmp(tokens[2], "disable") == 0) {
+ snprintf(out, out_size, "\n%s\n",
+ cmd_thread_pipeline_disable_help);
+ return;
+ }
+ }
+
+ snprintf(out, out_size, "Invalid command\n");
+}
+