pjsip_cli.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2013, Fairview 5 Engineering, LLC
 *
 * George Joseph <[email protected]>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

#include "asterisk.h"

#include <pjsip.h>
#include <pjsip_ua.h>

#include "asterisk/res_pjsip.h"
#include "include/res_pjsip_private.h"
#include "asterisk/res_pjsip_cli.h"
#include "asterisk/acl.h"
#include "asterisk/cli.h"
#include "asterisk/astobj2.h"
#include "asterisk/hashtab.h"
#include "asterisk/utils.h"
#include "asterisk/sorcery.h"

static struct ao2_container *formatter_registry;

int ast_sip_cli_print_sorcery_objectset(void *obj, void *arg, int flags)
{
   struct ast_sip_cli_context *context = arg;
   struct ast_variable *i;
   int max_name_width = 13;
   int max_value_width = 14;
   int width;
   char *separator;
   struct ast_variable *objset;

   if (!context->output_buffer) {
      return -1;
   }

   objset = ast_sorcery_objectset_create(ast_sip_get_sorcery(),obj);
   if (!objset) {
      return -1;
   }

   for (i = objset; i; i = i->next) {
      if (i->name) {
         width = strlen(i->name);
         max_name_width = width > max_name_width ? width : max_name_width;
      }
      if (i->value) {
         width = strlen(i->value);
         max_value_width = width > max_value_width ? width : max_value_width;
      }
   }

   separator = ast_alloca(max_name_width + max_value_width + 8);

   memset(separator, '=', max_name_width + max_value_width + 3);
   separator[max_name_width + max_value_width + 3] = 0;

   ast_str_append(&context->output_buffer, 0, " %-*s : %s\n", max_name_width, "ParameterName", "ParameterValue");
   ast_str_append(&context->output_buffer, 0, " %s\n", separator);

   objset = ast_variable_list_sort(objset);

   for (i = objset; i; i = i->next) {
      ast_str_append(&context->output_buffer, 0, " %-*s : %s\n", max_name_width, i->name, i->value);
   }

   ast_variables_destroy(objset);

   return 0;
}

static void complete_show_sorcery_object(struct ao2_container *container,
   struct ast_sip_cli_formatter_entry *formatter_entry,
   const char *word)
{
   size_t wordlen = strlen(word);
   void *object;
   struct ao2_iterator i = ao2_iterator_init(container, 0);

   while ((object = ao2_t_iterator_next(&i, "iterate thru endpoints table"))) {
      const char *id = formatter_entry->get_id(object);
      if (!strncasecmp(word, id, wordlen)) {
         ast_cli_completion_add(ast_strdup(id));
      }
      ao2_t_ref(object, -1, "toss iterator endpoint ptr before break");
   }
   ao2_iterator_destroy(&i);
}

static void dump_str_and_free(int fd, struct ast_str *buf)
{
   ast_cli(fd, "%s", ast_str_buffer(buf));
   ast_free(buf);
}

char *ast_sip_cli_traverse_objects(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   RAII_VAR(struct ao2_container *, container, NULL, ao2_cleanup);
   RAII_VAR(struct ast_sip_cli_formatter_entry *, formatter_entry, NULL, ao2_cleanup);
   RAII_VAR(void *, object, NULL, ao2_cleanup);
   int is_container = 0;
   const char *cmd1;
   const char *cmd2;
   const char *object_id;
   char formatter_type[64];
   const char *regex;

   struct ast_sip_cli_context context = {
      .indent_level = 0,
      .show_details = 0,
      .show_details_only_level_0 = 0,
      .recurse = 0,
   };

   if (cmd == CLI_INIT) {
      return NULL;
   }

   cmd1 = e->cmda[1];
   cmd2 = e->cmda[2];
   object_id = a->argv[3];

   if (!ast_ends_with(cmd2, "s")) {
      ast_copy_string(formatter_type, cmd2, sizeof(formatter_type));
      is_container = 0;
   } else if (ast_ends_with(cmd2, "ies")) {
      /* Take the plural "ies" off of the object name and re[place with "y". */
      int l = strlen(cmd2);
      snprintf(formatter_type, 64, "%*.*sy", l - 3, l - 3, cmd2);
      is_container = 1;
   } else {
      /* Take the plural "s" off of the object name. */
      ast_copy_string(formatter_type, cmd2, strlen(cmd2));
      is_container = 1;
   }

   if (!strcmp(cmd1, "show")) {
      context.show_details_only_level_0 = !is_container;
      context.recurse = 1;
   } else {
      is_container = 1;
   }

   if (cmd != CLI_GENERATE
      && is_container
      && a->argc >= 4
      && strcmp(object_id, "like") == 0) {
      if (ast_strlen_zero(a->argv[4])) {
         return CLI_SHOWUSAGE;
      }
      regex = a->argv[4];
   } else {
      regex = "";
   }

   if (cmd == CLI_GENERATE
      && (is_container
         || a->argc > 4
         || (a->argc == 4 && ast_strlen_zero(a->word)))) {
      return CLI_SUCCESS;
   }

   context.output_buffer = ast_str_create(256);
   if (!context.output_buffer) {
      return CLI_FAILURE;
   }

   formatter_entry = ast_sip_lookup_cli_formatter(formatter_type);
   if (!formatter_entry) {
      ast_log(LOG_ERROR, "No formatter registered for object type %s.\n",
         formatter_type);
      ast_free(context.output_buffer);
      return CLI_FAILURE;
   }
   ast_str_append(&context.output_buffer, 0, "\n");
   formatter_entry->print_header(NULL, &context, 0);
   ast_str_append(&context.output_buffer, 0,
      "==========================================================================================\n\n");

   if (is_container || cmd == CLI_GENERATE) {
      container = formatter_entry->get_container(regex);
      if (!container) {
         ast_cli(a->fd, "No container returned for object type %s.\n",
            formatter_type);
         ast_free(context.output_buffer);
         return CLI_FAILURE;
      }
   }

   if (cmd == CLI_GENERATE) {
      ast_free(context.output_buffer);
      complete_show_sorcery_object(container, formatter_entry, a->word);
      return NULL;
   }

   if (is_container) {
      if (!ao2_container_count(container)) {
         ast_free(context.output_buffer);
         ast_cli(a->fd, "No objects found.\n\n");
         return CLI_SUCCESS;
      }
      ao2_callback(container, OBJ_NODATA, formatter_entry->print_body, &context);
      ast_str_append(&context.output_buffer, 0, "\nObjects found: %d\n", ao2_container_count(container));

   } else {
      if (ast_strlen_zero(object_id)) {
         ast_free(context.output_buffer);
         ast_cli(a->fd, "No object specified.\n");
         return CLI_FAILURE;
      }

      object = formatter_entry->retrieve_by_id(object_id);
      if (!object) {
         ast_free(context.output_buffer);
         ast_cli(a->fd, "Unable to find object %s.\n\n", object_id);
         return CLI_SUCCESS;
      }
      formatter_entry->print_body(object, &context, 0);
   }

   ast_str_append(&context.output_buffer, 0, "\n");
   dump_str_and_free(a->fd, context.output_buffer);
   return CLI_SUCCESS;
}

static int formatter_sort(const void *obj, const void *arg, int flags)
{
   const struct ast_sip_cli_formatter_entry *left_obj = obj;
   const struct ast_sip_cli_formatter_entry *right_obj = arg;
   const char *right_key = arg;
   int cmp = 0;

   switch (flags & OBJ_SEARCH_MASK) {
   case OBJ_SEARCH_OBJECT:
      right_key = right_obj->name;
      /* Fall through */
   case OBJ_SEARCH_KEY:
      cmp = strcmp(left_obj->name, right_key);
      break;
   case OBJ_SEARCH_PARTIAL_KEY:
      cmp = strncmp(left_obj->name, right_key, strlen(right_key));
      break;
   default:
      cmp = 0;
      break;
   }

   return cmp;
}

static int formatter_compare(void *obj, void *arg, int flags)
{
   const struct ast_sip_cli_formatter_entry *left_obj = obj;
   const struct ast_sip_cli_formatter_entry *right_obj = arg;
   const char *right_key = arg;
   int cmp = 0;

   switch (flags & OBJ_SEARCH_MASK) {
   case OBJ_SEARCH_OBJECT:
      right_key = right_obj->name;
      /* Fall through */
   case OBJ_SEARCH_KEY:
      if (strcmp(left_obj->name, right_key) == 0) {;
         cmp = CMP_MATCH | CMP_STOP;
      }
      break;
   case OBJ_SEARCH_PARTIAL_KEY:
      if (strncmp(left_obj->name, right_key, strlen(right_key)) == 0) {
         cmp = CMP_MATCH;
      }
      break;
   default:
      cmp = 0;
      break;
   }

   return cmp;
}

static int formatter_hash(const void *obj, int flags)
{
   const struct ast_sip_cli_formatter_entry *left_obj = obj;
   if (flags & OBJ_SEARCH_OBJECT) {
      return ast_str_hash(left_obj->name);
   } else if (flags & OBJ_SEARCH_KEY) {
      return ast_str_hash(obj);
   }

   return -1;
}

struct ast_sip_cli_formatter_entry *ast_sip_lookup_cli_formatter(const char *name)
{
   return ao2_find(formatter_registry, name, OBJ_SEARCH_KEY | OBJ_NOLOCK);
}

int ast_sip_register_cli_formatter(struct ast_sip_cli_formatter_entry *formatter)
{
   ast_assert(formatter != NULL);
   ast_assert(formatter->name != NULL);
   ast_assert(formatter->print_body != NULL);
   ast_assert(formatter->print_header != NULL);
   ast_assert(formatter->get_container != NULL);
   ast_assert(formatter->iterate != NULL);
   ast_assert(formatter->get_id != NULL);
   ast_assert(formatter->retrieve_by_id != NULL);

   ao2_link(formatter_registry, formatter);

   return 0;
}

int ast_sip_unregister_cli_formatter(struct ast_sip_cli_formatter_entry *formatter)
{
   if (formatter) {
      ao2_wrlock(formatter_registry);
      if (ao2_ref(formatter, -1) == 2) {
         ao2_unlink_flags(formatter_registry, formatter, OBJ_NOLOCK);
      }
      ao2_unlock(formatter_registry);
   }
   return 0;
}

static char *handle_pjsip_show_version(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch(cmd) {
   case CLI_INIT:
      e->command = "pjsip show version";
      e->usage =
         "Usage: pjsip show version\n"
         "       Show the version of pjproject that res_pjsip is running against\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }

   ast_cli(a->fd, "PJPROJECT version currently running against: %s\n", pj_get_version());

   return CLI_SUCCESS;
}

static struct ast_cli_entry pjsip_cli[] = {
   AST_CLI_DEFINE(handle_pjsip_show_version, "Show the version of pjproject in use"),
};

int ast_sip_initialize_cli(void)
{
   formatter_registry = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_NOLOCK, 0, 17,
      formatter_hash, formatter_sort, formatter_compare);

   if (!formatter_registry) {
      ast_log(LOG_ERROR, "Unable to create formatter_registry.\n");
      return -1;
   }

   ast_cli_register_multiple(pjsip_cli, ARRAY_LEN(pjsip_cli));

   return 0;
}

void ast_sip_destroy_cli(void)
{
   ast_cli_unregister_multiple(pjsip_cli, ARRAY_LEN(pjsip_cli));
   ao2_ref(formatter_registry, -1);
}