/* * Copyright (C) 2020 VyOS maintainers and contributors * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 or later as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * */ #include <stdlib.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include <string.h> #include <sys/time.h> #include <time.h> #include <stdint.h> #include <sys/types.h> #include <sys/wait.h> #include <zmq.h> #include "mkjson.h" /* * * */ #if DEBUG #define DEBUG_ON 1 #else #define DEBUG_ON 0 #endif #define debug_print(fmt, ...) \ do { if (DEBUG_ON) fprintf(stderr, fmt, ##__VA_ARGS__); } while (0) #define debug_call(f) \ do { if (DEBUG_ON) f; } while (0) #define SOCKET_PATH "ipc:///run/vyos-configd.sock" #define GET_ACTIVE "cli-shell-api --show-active-only --show-show-defaults --show-ignore-edit showConfig" #define GET_SESSION "cli-shell-api --show-working-only --show-show-defaults --show-ignore-edit showConfig" #define COMMIT_MARKER "/var/tmp/initial_in_commit" enum { SUCCESS = 1 << 0, ERROR_COMMIT = 1 << 1, ERROR_DAEMON = 1 << 2, PASS = 1 << 3 }; volatile int init_alarm = 0; volatile int timeout = 0; int initialization(void *); int pass_through(char **, int); void timer_handler(int); double get_posix_clock_time(void); int main(int argc, char* argv[]) { // string for node data: conf_mode script and tagnode, if applicable char string_node_data[256]; string_node_data[0] = '\0'; void *context = zmq_ctx_new(); void *requester = zmq_socket(context, ZMQ_REQ); int init_timeout = 0; debug_print("Connecting to vyos-configd ...\n"); zmq_connect(requester, SOCKET_PATH); if (access(COMMIT_MARKER, F_OK) != -1) { init_timeout = initialization(requester); if (!init_timeout) remove(COMMIT_MARKER); } int end = argc > 3 ? 2 : argc - 1; // if initial communication failed, pass through execution of script if (init_timeout) { int ret = pass_through(argv, end); return ret; } for (int i = end; i > 0 ; i--) { strncat(&string_node_data[0], argv[i], 127); } char error_code[1]; debug_print("Sending node data ...\n"); char *string_node_data_msg = mkjson(MKJSON_OBJ, 2, MKJSON_STRING, "type", "node", MKJSON_STRING, "data", &string_node_data[0]); zmq_send(requester, string_node_data_msg, strlen(string_node_data_msg), 0); zmq_recv(requester, error_code, 1, 0); debug_print("Received node data receipt\n"); int err = (int)error_code[0]; free(string_node_data_msg); zmq_close(requester); zmq_ctx_destroy(context); if (err & PASS) { debug_print("Received PASS\n"); int ret = pass_through(argv, end); return ret; } if (err & ERROR_DAEMON) { debug_print("Received ERROR_DAEMON\n"); int ret = pass_through(argv, end); return ret; } if (err & ERROR_COMMIT) { debug_print("Received ERROR_COMMIT\n"); return -1; } return 0; } int initialization(void* Requester) { char *active_str = NULL; size_t active_len = 0; char *session_str = NULL; size_t session_len = 0; char *empty_string = "\n"; char buffer[16]; struct sigaction sa; struct itimerval timer, none_timer; memset(&sa, 0, sizeof(sa)); sa.sa_handler = &timer_handler; sigaction(SIGALRM, &sa, NULL); timer.it_value.tv_sec = 0; timer.it_value.tv_usec = 10000; timer.it_interval.tv_sec = timer.it_interval.tv_usec = 0; none_timer.it_value.tv_sec = none_timer.it_value.tv_usec = 0; none_timer.it_interval.tv_sec = none_timer.it_interval.tv_usec = 0; double prev_time_value, time_value; double time_diff; char *pid_val = getenv("VYATTA_CONFIG_TMP"); strsep(&pid_val, "_"); debug_print("config session pid: %s\n", pid_val); debug_print("Sending init announcement\n"); char *init_announce = mkjson(MKJSON_OBJ, 1, MKJSON_STRING, "type", "init"); // check for timeout on initial contact while (!init_alarm) { debug_call(prev_time_value = get_posix_clock_time()); setitimer(ITIMER_REAL, &timer, NULL); zmq_send(Requester, init_announce, strlen(init_announce), 0); zmq_recv(Requester, buffer, 16, 0); setitimer(ITIMER_REAL, &none_timer, &timer); debug_call(time_value = get_posix_clock_time()); debug_print("Received init receipt\n"); debug_call(time_diff = time_value - prev_time_value); debug_print("time elapse %f\n", time_diff); break; } free(init_announce); if (timeout) return -1; FILE *fp_a = popen(GET_ACTIVE, "r"); getdelim(&active_str, &active_len, '\0', fp_a); int ret = pclose(fp_a); if (!ret) { debug_print("Sending active config\n"); zmq_send(Requester, active_str, active_len - 1, 0); zmq_recv(Requester, buffer, 16, 0); debug_print("Received active receipt\n"); } else { debug_print("Sending empty active config\n"); zmq_send(Requester, empty_string, 0, 0); zmq_recv(Requester, buffer, 16, 0); debug_print("Received active receipt\n"); } free(active_str); FILE *fp_s = popen(GET_SESSION, "r"); getdelim(&session_str, &session_len, '\0', fp_s); pclose(fp_s); debug_print("Sending session config\n"); zmq_send(Requester, session_str, session_len - 1, 0); zmq_recv(Requester, buffer, 16, 0); debug_print("Received session receipt\n"); free(session_str); debug_print("Sending config session pid\n"); zmq_send(Requester, pid_val, strlen(pid_val), 0); zmq_recv(Requester, buffer, 16, 0); debug_print("Received pid receipt\n"); return 0; } int pass_through(char **argv, int end) { char *newargv[] = { NULL, NULL }; pid_t child_pid; newargv[0] = argv[end]; if (end > 1) { putenv(argv[end - 1]); } debug_print("pass-through invoked\n"); if ((child_pid=fork()) < 0) { debug_print("fork() failed\n"); return -1; } else if (child_pid == 0) { if (-1 == execv(argv[end], newargv)) { debug_print("pass_through execve failed %s: %s\n", argv[end], strerror(errno)); return -1; } } else if (child_pid > 0) { int status; pid_t wait_pid = waitpid(child_pid, &status, 0); if (wait_pid < 0) { debug_print("waitpid() failed\n"); return -1; } else if (wait_pid == child_pid) { if (WIFEXITED(status)) { debug_print("child exited with code %d\n", WEXITSTATUS(status)); return WEXITSTATUS(status); } } } return 0; } void timer_handler(int signum) { debug_print("timer_handler invoked\n"); timeout = 1; init_alarm = 1; return; } #ifdef _POSIX_MONOTONIC_CLOCK double get_posix_clock_time(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) { return (double) (ts.tv_sec + ts.tv_nsec / 1000000000.0); } else { return 0; } } #else double get_posix_clock_time(void) {return (double)0;} #endif