/* * Ouroboros - Copyright (C) 2016 * * The API to instruct IPCPs * * Sander Vrijders <sander.vrijders@intec.ugent.be> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define OUROBOROS_PREFIX "lib-ipcp" #include <ouroboros/config.h> #include <ouroboros/errno.h> #include <ouroboros/ipcp.h> #include <ouroboros/common.h> #include <ouroboros/logs.h> #include <ouroboros/utils.h> #include <ouroboros/sockets.h> #include <stdlib.h> #include <string.h> #include <signal.h> #include <stdbool.h> #include <pthread.h> #include <sys/types.h> #include <sys/wait.h> static void close_ptr(void * o) { close(*((int *) o)); } static ipcp_msg_t * send_recv_ipcp_msg(pid_t api, ipcp_msg_t * msg) { int sockfd = 0; buffer_t buf; char * sock_path = NULL; ssize_t count = 0; ipcp_msg_t * recv_msg = NULL; sock_path = ipcp_sock_path(api); if (sock_path == NULL) return NULL; sockfd = client_socket_open(sock_path); if (sockfd < 0) { free(sock_path); return NULL; } free(sock_path); buf.len = ipcp_msg__get_packed_size(msg); if (buf.len == 0) { close(sockfd); return NULL; } buf.data = malloc(IPCP_MSG_BUF_SIZE); if (buf.data == NULL) { close(sockfd); return NULL; } pthread_cleanup_push(close_ptr, (void *) &sockfd); pthread_cleanup_push((void (*)(void *)) free, (void *) buf.data); ipcp_msg__pack(msg, buf.data); if (write(sockfd, buf.data, buf.len) != -1) count = read(sockfd, buf.data, IPCP_MSG_BUF_SIZE); if (count > 0) recv_msg = ipcp_msg__unpack(NULL, count, buf.data); pthread_cleanup_pop(true); pthread_cleanup_pop(true); return recv_msg; } pid_t ipcp_create(enum ipcp_type ipcp_type) { pid_t api = -1; char irmd_api[10]; size_t len = 0; char * ipcp_dir = "/sbin/"; char * full_name = NULL; char * exec_name = NULL; char * log_file = NULL; sprintf(irmd_api, "%u", getpid()); api = fork(); if (api == -1) { LOG_ERR("Failed to fork"); return api; } if (api != 0) { return api; } if (ipcp_type == IPCP_NORMAL) exec_name = IPCP_NORMAL_EXEC; else if (ipcp_type == IPCP_SHIM_UDP) exec_name = IPCP_SHIM_UDP_EXEC; else if (ipcp_type == IPCP_SHIM_ETH_LLC) exec_name = IPCP_SHIM_ETH_LLC_EXEC; else if (ipcp_type == IPCP_LOCAL) exec_name = IPCP_LOCAL_EXEC; else exit(EXIT_FAILURE); len += strlen(INSTALL_PREFIX); len += strlen(ipcp_dir); len += strlen(exec_name); len += 1; full_name = malloc(len + 1); if (full_name == NULL) { LOG_ERR("Failed to malloc"); exit(EXIT_FAILURE); } strcpy(full_name, INSTALL_PREFIX); strcat(full_name, ipcp_dir); strcat(full_name, exec_name); full_name[len] = '\0'; if (logfile != NULL) { log_file = malloc(20); if (log_file == NULL) { LOG_ERR("Failed to malloc."); exit(EXIT_FAILURE); } sprintf(log_file, "ipcpd-%u.log", getpid()); } /* log_file to be placed at the end */ char * argv[] = {full_name, irmd_api, log_file, 0}; char * envp[] = {0}; execve(argv[0], &argv[0], envp); LOG_DBG("%s", strerror(errno)); LOG_ERR("Failed to load IPCP daemon"); LOG_ERR("Make sure to run the installed version"); free(full_name); exit(EXIT_FAILURE); } int ipcp_destroy(pid_t api) { int status; if (kill(api, SIGTERM)) { LOG_ERR("Failed to destroy IPCP"); return -1; } if (waitpid(api, &status, 0) < 0) { LOG_ERR("Failed to destroy IPCP"); return -1; } return 0; } int ipcp_bootstrap(pid_t api, dif_config_msg_t * conf) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; if (conf == NULL) return -EINVAL; msg.code = IPCP_MSG_CODE__IPCP_BOOTSTRAP; msg.conf = conf; recv_msg = send_recv_ipcp_msg(api, &msg); if (recv_msg == NULL) return -1; if (recv_msg->has_result == false) { ipcp_msg__free_unpacked(recv_msg, NULL); return -1; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_enroll(pid_t api, char * dif_name) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; if (dif_name == NULL) return -EINVAL; msg.code = IPCP_MSG_CODE__IPCP_ENROLL; msg.dif_name = dif_name; recv_msg = send_recv_ipcp_msg(api, &msg); if (recv_msg == NULL) { return -1; } if (recv_msg->has_result == false) { ipcp_msg__free_unpacked(recv_msg, NULL); return -1; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_name_reg(pid_t api, char * name) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; if (name == NULL) return -1; msg.code = IPCP_MSG_CODE__IPCP_NAME_REG; msg.name = name; recv_msg = send_recv_ipcp_msg(api, &msg); if (recv_msg == NULL) return -1; if (recv_msg->has_result == false) { ipcp_msg__free_unpacked(recv_msg, NULL); return -1; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_name_unreg(pid_t api, char * name) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; msg.code = IPCP_MSG_CODE__IPCP_NAME_UNREG; msg.name = name; recv_msg = send_recv_ipcp_msg(api, &msg); if (recv_msg == NULL) return -1; if (recv_msg->has_result == false) { ipcp_msg__free_unpacked(recv_msg, NULL); return -1; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_flow_alloc(pid_t api, int port_id, pid_t n_api, char * dst_name, char * src_ae_name, enum qos_cube qos) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; if (dst_name == NULL || src_ae_name == NULL) return -EINVAL; msg.code = IPCP_MSG_CODE__IPCP_FLOW_ALLOC; msg.has_port_id = true; msg.port_id = port_id; msg.has_api = true; msg.api = n_api; msg.src_ae_name = src_ae_name; msg.dst_name = dst_name; msg.has_qos_cube = true; msg.qos_cube = qos; recv_msg = send_recv_ipcp_msg(api, &msg); if (recv_msg == NULL) return -1; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -1; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_flow_alloc_resp(pid_t api, int port_id, pid_t n_api, int response) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; msg.code = IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP; msg.has_port_id = true; msg.port_id = port_id; msg.has_api = true; msg.api = n_api; msg.has_response = true; msg.response = response; recv_msg = send_recv_ipcp_msg(api, &msg); if (recv_msg == NULL) return -1; if (recv_msg->has_result == false) { ipcp_msg__free_unpacked(recv_msg, NULL); return -1; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_flow_req_arr(pid_t api, char * dst_name, char * src_ae_name) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int port_id = -1; if (dst_name == NULL || src_ae_name == NULL) return -EINVAL; msg.code = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR; msg.has_api = true; msg.api = api; msg.dst_name = dst_name; msg.ae_name = src_ae_name; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -1; if (!recv_msg->has_port_id) { irm_msg__free_unpacked(recv_msg, NULL); return -1; } port_id = recv_msg->port_id; irm_msg__free_unpacked(recv_msg, NULL); return port_id; } int ipcp_flow_alloc_reply(pid_t api, int port_id, int response) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; msg.code = IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY; msg.port_id = port_id; msg.has_port_id = true; msg.response = response; msg.has_response = true; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -1; if (recv_msg->has_result == false) { irm_msg__free_unpacked(recv_msg, NULL); return -1; } ret = recv_msg->result; irm_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_flow_dealloc(pid_t api, int port_id) { if (api != 0) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; msg.code = IPCP_MSG_CODE__IPCP_FLOW_DEALLOC; msg.has_port_id = true; msg.port_id = port_id; recv_msg = send_recv_ipcp_msg(api, &msg); if (recv_msg == NULL) return 0; if (recv_msg->has_result == false) { ipcp_msg__free_unpacked(recv_msg, NULL); return 0; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } else { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; msg.code = IRM_MSG_CODE__IPCP_FLOW_DEALLOC; msg.has_port_id = true; msg.port_id = port_id; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return 0; if (recv_msg->has_result == false) { irm_msg__free_unpacked(recv_msg, NULL); return 0; } ret = recv_msg->result; irm_msg__free_unpacked(recv_msg, NULL); return ret; } }