- Fix: avoid infinite loop on mulitcast read thread if no data to read
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
This commit is contained in:
Cedric Roux
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/*******************************************************************************
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Eurecom OpenAirInterface
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Copyright(c) 1999 - 2011 Eurecom
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Contact Information
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Openair Admin: openair_admin@eurecom.fr
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Openair Tech : openair_tech@eurecom.fr
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Forums : http://forums.eurecom.fsr/openairinterface
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Address : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France
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*******************************************************************************/
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/*! \file cli.c
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* \brief oai main cli core
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* \author Navid Nikaein
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* \date 2011
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* \version 0.1
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* \warning This component can be runned only in user-space
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* @ingroup util
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*/
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#include <unistd.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include "cli.h"
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extern cli_config *cli_cfg;
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command commands[] = {
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{0, "help",NULL,com_help, NULL,"Display this text" },
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{0, "?",NULL,com_help, NULL, "help at any point" },
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{2, "prompt",NULL,prompt, prompt_usage,"Set/get cli prompt" },
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{2, "info",NULL,info, NULL,"get software information" },
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{1, "start",NULL,start, start_usage,"Start eNB/UE instance" },
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{1, "set",NULL,set, set_usage,"set log for a give component" },
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{0, "exit",NULL,com_exit, NULL,"Exit using OpenAir CLI Interface" },
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{0, (char *)NULL,NULL, NULL,NULL, (char *)NULL }
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};
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static uid_t real_uid;
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void priv_init(void) {
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real_uid = getuid();
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}
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void priv_up(void) {
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if (seteuid(0) != 0) {
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printf("[CLI] Error setting uid to %d\n", real_uid);
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}
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}
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void priv_down(void) {
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if (seteuid(real_uid) != 0) {
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printf("[CLI] Error setting uid to %d\n", 0);
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}
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}
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int cli_start(void) {
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priv_init();
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priv_down();
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putenv("REMADDR=");
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// get username
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if ((username = getlogin()) == NULL) {
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username = getenv("USER");
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}
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set_permissions_map();
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// set login info
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cli_login(username, CLI_MAX_NODES, CLI_MAX_CMDS);
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// send welcome msg to the client
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sprintf(buffer, "%s", WELCOME_MSG);
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send(cli_cfg->cfd, buffer, strlen(buffer), 0);
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printf(WELCOME_MSG);
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printf("[CLI] started...\n");
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sprintf(cli_cfg->prompt,"%s%c ", cli_prompt(), cli_cfg->promptchar);
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send(cli_cfg->cfd,cli_cfg->prompt, strlen(cli_cfg->prompt), 0);
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return 1;
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}
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int cli_loop(char * msg) {
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char *s;
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/* Remove leading and trailing whitespace from the line.
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Then, if there is anything left, add it to the history list
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and execute it. */
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s = stripwhite(msg);
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if (*s) {
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//add_history(s);
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execute_line(s);
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}
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send(cli_cfg->cfd, cli_cfg->prompt, strlen(cli_cfg->prompt), 0);
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return 0;
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}
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/**
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* The permissions map is a bit map which defines which modes are available
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* to a user. The permissions groups map to linux groups in the following
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* way: subtract 1000. The remainder is the bit number.
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* Thus unix groups 1000, 1001, 1002 etc represent the permissions groups
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* default, config and admin respectively.
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*
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*/
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int set_permissions_map(void) {
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gid_t group[10];
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int n, i;
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int perm_num;
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// get the number of supplementary group IDs
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n = getgroups(10, group);
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// give show permissions even if user has none
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map_permissions = ADMIN_PERMISSION;
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for (i=0; i<n; i++) {
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perm_num = group[i] - 1000;
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if (perm_num < 0 || perm_num > 31) {
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continue;
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}
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//map_permissions |= (1 << perm_num);
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map_permissions |= ((1 << (perm_num+1)) - 1);
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}
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printf("[CLI] Permissions %04x for this session\n", map_permissions);
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return 0;
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}
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int cli_login(const char *username, int maxnodes, int maxcmds) {
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cli_set_prompt_char();
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printf("[CLI] Client initialised\n");
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// log the connection
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// telnets use REMADDR
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host = getenv("REMADDR");
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if (host) {
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snprintf(g_sid, MAX_SID, "%s#%s", username, host);
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printf("[CLI] login via telnet by user %s from address %s\n", username, host);
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} else {
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host = getenv("SSH_CLIENT");
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if (host) {
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char *cp;
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// format is <rem_addr> <rem_port> <local_port>
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// replace first space with ':', second terminates the string
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cp = strchr(host, ' ');
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if (cp) {
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*cp = ':';
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}
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cp = strchr(host, ' ');
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if (cp) {
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*cp = '\0';
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}
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snprintf(g_sid, MAX_SID, "%s$%s", username, host);
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printf("[CLI] login via SSH by user %s from address %s", username, host);
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} else {
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host = getenv("HOST");
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if (host) {
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snprintf(g_sid, MAX_SID, "%s$%s", username, host);
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printf("[CLI] by user %s from host %s", username, host);
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} else {
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printf("[CLI]Login by user %s from unknown destination\n", username);
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}
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}
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}
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//register an exit function
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atexit(cli_finish);
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return 0;
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}
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char *cli_prompt(void) {
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static char promptstr[200];
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promptstr[0]='\0';
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snprintf(promptstr, 200,"%s@%s",username, cli_cfg->prompt);
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return promptstr;
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}
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int cli_set_prompt_char(void) {
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if (map_permissions & ADMIN_PERMISSION) {
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cli_cfg->promptchar = '#';
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} else if (map_permissions & CONFIG_PERMISSION) {
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cli_cfg->promptchar = '%';
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} else if (map_permissions & SHOW_PERMISSION) {
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cli_cfg->promptchar = '$';
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}
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return 0;
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}
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void cli_finish(void) {
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char *cp;
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if ((cp = strchr(g_sid, '#'))) {
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*cp = '\0';
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printf("[CLI] logout via telnet by user %s from address %s\n", g_sid, cp+1);
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} else if ((cp = strchr(g_sid, '$'))) {
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*cp = '\0';
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printf("[CLI] logout via SSH by user %s from address %s\n", g_sid, cp+1);
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} else {
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printf("[CLI] logout from %s\n", g_sid);
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}
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return;
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}
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/* Execute a command line. */
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int execute_line (char *line) {
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register int i;
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command *command;
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char *word;
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/* Isolate the command word. */
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i = 0;
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while (line[i] && whitespace (line[i]))
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i++;
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word = line + i;
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while (line[i] && !whitespace (line[i]))
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i++;
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if (line[i])
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line[i++] = '\0';
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command = find_command(word);
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if (!command) {
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sprintf(buffer, "%s: %s \n", word, NOCOMMAND_MSG);
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send(cli_cfg->cfd, buffer, strlen(buffer), 0);
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printf("[CLI] commnad %s does not exist !\n", word);
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return (-1);
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}
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/* Get argument to command, if any. */
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while (whitespace (line[i]))
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i++;
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word = line + i;
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/* Call the function. */
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return ((*(command->func)) (word));
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}
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/* Look up NAME as the name of a command, and return a pointer to that
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command. Return a NULL pointer if NAME isn't a command name. */
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command * find_command (char *name) {
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register int i;
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for (i = 0; commands[i].name; i++){
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if (strcmp (name, commands[i].name) == 0)
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return (&commands[i]);
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}
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return ((command *)NULL);
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}
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/* Strip whitespace from the start and end of STRING. Return a pointer
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into STRING. */
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char * stripwhite (char *string) {
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register char *s, *t;
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for (s = string; whitespace (*s); s++)
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;
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if (*s == 0)
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return (s);
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t = s + strlen (s) - 1;
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while (t > s && whitespace (*t))
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t--;
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*++t = '\0';
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return s;
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}
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/* Generator function for command completion. STATE lets us know whether
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to start from scratch; without any state (i.e. STATE == 0), then we
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start at the top of the list. */
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/* Print out help for ARG, or for all of the commands if ARG is
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not present. */
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int com_help (char *arg) {
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register int i;
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int printed = 0;
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for (i = 0; commands[i].name != NULL; i++){
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// if (!*arg || (strcmp (arg, commands[i].name) == 0)){
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sprintf (buffer,"%s\t\t<%s>\n", commands[i].name, commands[i].doc);
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send(cli_cfg->cfd, buffer, strlen(buffer), 0);
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printed++;
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// }
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}
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if (!printed) {
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printf("No commands match `%s'. Possibilties are:\n", arg);
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for (i = 0; commands[i].name; i++){
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/* Print in six columns. */
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if (printed == 6) {
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printed = 0;
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printf("\n");
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}
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printf("%s\t", commands[i].name);
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printed++;
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}
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if (printed)
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printf("\n");
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}
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return (0);
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}
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int whitespace (char c) {
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return (isspace((int)c));
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}
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