/* * Ouroboros - Copyright (C) 2016 - 2018 * * The API to instruct IPCPs * * Dimitri Staessens <dimitri.staessens@ugent.be> * Sander Vrijders <sander.vrijders@ugent.be> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 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, write to the Free Software * Foundation, Inc., http://www.fsf.org/about/contact/. */ #define _POSIX_C_SOURCE 199309L #include "config.h" #define OUROBOROS_PREFIX "irmd/ipcp" #include <ouroboros/logs.h> #include <ouroboros/errno.h> #include <ouroboros/utils.h> #include <ouroboros/sockets.h> #include "ipcp.h" #include <stdlib.h> #include <string.h> #include <signal.h> #include <stdbool.h> #include <pthread.h> #include <sys/types.h> #include <sys/wait.h> #include <sys/socket.h> #include <sys/time.h> #include <spawn.h> static void close_ptr(void * o) { close(*(int *) o); } ipcp_msg_t * send_recv_ipcp_msg(pid_t pid, ipcp_msg_t * msg) { int sockfd = 0; uint8_t buf[SOCK_BUF_SIZE]; char * sock_path = NULL; ssize_t len; ipcp_msg_t * recv_msg = NULL; struct timeval tv; if (kill(pid, 0) < 0) return NULL; sock_path = ipcp_sock_path(pid); if (sock_path == NULL) return NULL; sockfd = client_socket_open(sock_path); if (sockfd < 0) { free(sock_path); return NULL; } free(sock_path); len = ipcp_msg__get_packed_size(msg); if (len == 0) { close(sockfd); return NULL; } switch (msg->code) { case IPCP_MSG_CODE__IPCP_BOOTSTRAP: tv.tv_sec = BOOTSTRAP_TIMEOUT / 1000; tv.tv_usec = (BOOTSTRAP_TIMEOUT % 1000) * 1000; break; case IPCP_MSG_CODE__IPCP_ENROLL: tv.tv_sec = ENROLL_TIMEOUT / 1000; tv.tv_usec = (ENROLL_TIMEOUT % 1000) * 1000; break; case IPCP_MSG_CODE__IPCP_REG: tv.tv_sec = REG_TIMEOUT / 1000; tv.tv_usec = (REG_TIMEOUT % 1000) * 1000; break; case IPCP_MSG_CODE__IPCP_QUERY: tv.tv_sec = QUERY_TIMEOUT / 1000; tv.tv_usec = (QUERY_TIMEOUT % 1000) * 1000; break; case IPCP_MSG_CODE__IPCP_CONNECT: tv.tv_sec = CONNECT_TIMEOUT / 1000; tv.tv_usec = (CONNECT_TIMEOUT % 1000) * 1000; break; default: tv.tv_sec = SOCKET_TIMEOUT / 1000; tv.tv_usec = (SOCKET_TIMEOUT % 1000) * 1000; break; } if (setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, (void *) &tv, sizeof(tv))) log_warn("Failed to set timeout on socket."); pthread_cleanup_push(close_ptr, (void *) &sockfd); ipcp_msg__pack(msg, buf); if (write(sockfd, buf, len) != -1) len = read(sockfd, buf, SOCK_BUF_SIZE); if (len > 0) recv_msg = ipcp_msg__unpack(NULL, len, buf); pthread_cleanup_pop(true); return recv_msg; } pid_t ipcp_create(const char * name, enum ipcp_type ipcp_type) { pid_t pid = -1; char * ipcp_dir = "/sbin/"; char * exec_name = NULL; char irmd_pid[10]; char full_name[256]; char * argv[5]; switch(ipcp_type) { case IPCP_NORMAL: exec_name = IPCP_NORMAL_EXEC; break; case IPCP_UDP: exec_name = IPCP_UDP_EXEC; break; case IPCP_ETH_LLC: exec_name = IPCP_ETH_LLC_EXEC; break; case IPCP_ETH_DIX: exec_name = IPCP_ETH_DIX_EXEC; break; case IPCP_LOCAL: exec_name = IPCP_LOCAL_EXEC; break; case IPCP_RAPTOR: exec_name = IPCP_RAPTOR_EXEC; break; default: return -1; } if (strlen(exec_name) == 0) { log_err("IPCP type not installed."); return -1; } sprintf(irmd_pid, "%u", getpid()); strcpy(full_name, INSTALL_PREFIX); strcat(full_name, ipcp_dir); strcat(full_name, exec_name); /* log_file to be placed at the end */ argv[0] = full_name; argv[1] = irmd_pid; argv[2] = (char *) name; if (log_syslog) argv[3] = "1"; else argv[3] = NULL; argv[4] = NULL; if (posix_spawn(&pid, argv[0], NULL, NULL, argv, NULL)) { log_err("Failed to spawn new process"); return -1; } return pid; } int ipcp_destroy(pid_t pid) { if (kill(pid, SIGTERM)) { log_err("Failed to destroy IPCP"); return -1; } return 0; } int ipcp_bootstrap(pid_t pid, ipcp_config_msg_t * conf, struct layer_info * info) { 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(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; if (ret != 0) { ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } if (recv_msg->layer_info == NULL) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } info->dir_hash_algo = recv_msg->layer_info->dir_hash_algo; strcpy(info->layer_name, recv_msg->layer_info->layer_name); ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_enroll(pid_t pid, const char * dst, struct layer_info * info) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; if (dst == NULL) return -EINVAL; msg.code = IPCP_MSG_CODE__IPCP_ENROLL; msg.dst = (char *) dst; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; if (ret != 0) { ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } if (recv_msg->layer_info == NULL) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } info->dir_hash_algo = recv_msg->layer_info->dir_hash_algo; strcpy(info->layer_name, recv_msg->layer_info->layer_name); ipcp_msg__free_unpacked(recv_msg, NULL); return 0; } int ipcp_connect(pid_t pid, const char * dst, const char * component) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; msg.code = IPCP_MSG_CODE__IPCP_CONNECT; msg.dst = (char *) dst; msg.comp = (char *) component; msg.has_pid = true; msg.pid = pid; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_disconnect(pid_t pid, const char * dst, const char * component) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; msg.code = IPCP_MSG_CODE__IPCP_DISCONNECT; msg.dst = (char *) dst; msg.comp = (char *) component; msg.has_pid = true; msg.pid = pid; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_reg(pid_t pid, const uint8_t * hash, size_t len) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; assert(hash); msg.code = IPCP_MSG_CODE__IPCP_REG; msg.has_hash = true; msg.hash.len = len; msg.hash.data = (uint8_t *)hash; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_unreg(pid_t pid, const uint8_t * hash, size_t len) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; msg.code = IPCP_MSG_CODE__IPCP_UNREG; msg.has_hash = true; msg.hash.len = len; msg.hash.data = (uint8_t *) hash; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_query(pid_t pid, const uint8_t * hash, size_t len) { ipcp_msg_t msg = IPCP_MSG__INIT; ipcp_msg_t * recv_msg = NULL; int ret = -1; msg.code = IPCP_MSG_CODE__IPCP_QUERY; msg.has_hash = true; msg.hash.len = len; msg.hash.data = (uint8_t *) hash; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_flow_alloc(pid_t pid, int flow_id, pid_t n_pid, const uint8_t * dst, size_t len, qosspec_t qs) { ipcp_msg_t msg = IPCP_MSG__INIT; qosspec_msg_t qs_msg; ipcp_msg_t * recv_msg = NULL; int ret = -1; assert(dst); msg.code = IPCP_MSG_CODE__IPCP_FLOW_ALLOC; msg.has_flow_id = true; msg.flow_id = flow_id; msg.has_pid = true; msg.pid = n_pid; msg.has_hash = true; msg.hash.len = len; msg.hash.data = (uint8_t *) dst; qs_msg = spec_to_msg(&qs); msg.qosspec = &qs_msg; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_flow_alloc_resp(pid_t pid, int flow_id, pid_t n_pid, 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_flow_id = true; msg.flow_id = flow_id; msg.has_pid = true; msg.pid = n_pid; msg.has_response = true; msg.response = response; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return -EIPCP; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return -EIPCP; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; } int ipcp_flow_dealloc(pid_t pid, int flow_id) { 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_flow_id = true; msg.flow_id = flow_id; recv_msg = send_recv_ipcp_msg(pid, &msg); if (recv_msg == NULL) return 0; if (!recv_msg->has_result) { ipcp_msg__free_unpacked(recv_msg, NULL); return 0; } ret = recv_msg->result; ipcp_msg__free_unpacked(recv_msg, NULL); return ret; }