/* * Ouroboros - Copyright (C) 2016 - 2017 * * The API to instruct the IRM * * Dimitri Staessens <dimitri.staessens@ugent.be> * Sander Vrijders <sander.vrijders@ugent.be> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * version 2.1 as published by the Free Software Foundation. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301 USA */ #include <ouroboros/config.h> #include <ouroboros/errno.h> #include <ouroboros/irm.h> #include <ouroboros/utils.h> #include <ouroboros/sockets.h> #include <stdbool.h> #include <string.h> #include <stdlib.h> #include <sys/stat.h> pid_t irm_create_ipcp(const char * name, enum ipcp_type ipcp_type) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; msg.code = IRM_MSG_CODE__IRM_CREATE_IPCP; msg.dst_name = (char *) name; msg.has_ipcp_type = true; msg.ipcp_type = ipcp_type; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -EIRMD; 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 irm_destroy_ipcp(pid_t api) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; if (api == -1) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_DESTROY_IPCP; msg.has_api = true; msg.api = api; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -EIRMD; 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 irm_bootstrap_ipcp(pid_t api, const struct dif_config * conf) { irm_msg_t msg = IRM_MSG__INIT; dif_config_msg_t config = DIF_CONFIG_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; if (api == -1 || conf == NULL) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_BOOTSTRAP_IPCP; msg.has_api = true; msg.api = api; msg.conf = &config; config.dif_name = conf->dif_name; config.ipcp_type = conf->type; switch (conf->type) { case IPCP_NORMAL: config.has_addr_size = true; config.has_cep_id_size = true; config.has_pdu_length_size = true; config.has_seqno_size = true; config.has_has_ttl = true; config.has_has_chk = true; config.has_min_pdu_size = true; config.has_max_pdu_size = true; config.has_addr_auth_type = true; config.has_dt_gam_type = true; config.has_rm_gam_type = true; config.addr_size = conf->addr_size; config.cep_id_size = conf->cep_id_size; config.pdu_length_size = conf->pdu_length_size; config.seqno_size = conf->seqno_size; config.has_ttl = conf->has_ttl; config.has_chk = conf->has_chk; config.min_pdu_size = conf->min_pdu_size; config.max_pdu_size = conf->max_pdu_size; config.addr_auth_type = conf->addr_auth_type; config.dt_gam_type = conf->dt_gam_type; config.rm_gam_type = conf->rm_gam_type; break; case IPCP_SHIM_UDP: config.has_ip_addr = true; config.ip_addr = conf->ip_addr; config.has_dns_addr = true; config.dns_addr = conf->dns_addr; break; case IPCP_LOCAL: break; case IPCP_SHIM_ETH_LLC: config.if_name = conf->if_name; break; default: return -EIPCPTYPE; } recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -EIRMD; 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; } ssize_t irm_list_ipcps(const char * name, pid_t ** apis) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; size_t nr = 0; size_t i; if (apis == NULL) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_LIST_IPCPS; msg.dst_name = (char *) name; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) { free(msg.dif_name); return -EIRMD; } if (recv_msg->apis == NULL) { irm_msg__free_unpacked(recv_msg, NULL); return -1; } nr = recv_msg->n_apis; *apis = malloc(nr * sizeof(pid_t)); if (*apis == NULL) { irm_msg__free_unpacked(recv_msg, NULL); return -ENOMEM; } for (i = 0; i < nr; i++) { (*apis)[i] = recv_msg->apis[i]; } irm_msg__free_unpacked(recv_msg, NULL); return nr; } int irm_enroll_ipcp(pid_t api, const char * dif_name) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; if (api == -1 || dif_name == NULL) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_ENROLL_IPCP; msg.has_api = true; msg.api = api; msg.n_dif_name = 1; msg.dif_name = malloc(sizeof(*(msg.dif_name))); if (msg.dif_name == NULL) return -ENOMEM; msg.dif_name[0] = (char *) dif_name; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) { free(msg.dif_name); return -EIRMD; } 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); free(msg.dif_name); return ret; } static int check_ap(const char * ap_name) { struct stat s; if (stat(ap_name, &s) != 0) return -ENOENT; if (!(s.st_mode & S_IXUSR)) return -EPERM; return 0; } static int check_ap_path(char ** ap_name) { char * path = getenv("PATH"); char * path_end = path + strlen(path) + 1; char * pstart; char * pstop = path; char * tmp; char * tstop; char * tstart; bool perm = true; int ret = 0; assert(ap_name); if (*ap_name == NULL || path == NULL) return -EINVAL; if (!strlen(path) || strchr(*ap_name, '/') != NULL) { if ((ret = check_ap(*ap_name)) < 0) return ret; return 0; } tmp = malloc(strlen(path) + strlen(*ap_name) + 2); if (tmp == NULL) return -ENOMEM; tstop = tmp + strlen(path) + 1; strcpy(tstop--, *ap_name); while (pstop < path_end) { ret = 0; pstart = pstop; if (*pstart != '/') { free(tmp); return -EINVAL; } while (*pstop != '\0' && *pstop != ':') pstop++; *pstop = '\0'; tstart = tstop - (pstop++ - pstart); strcpy(tstart, pstart); *tstop = '/'; if ((ret = check_ap(tstart)) < 0) { if (ret == -EPERM) perm = false; continue; } free(*ap_name); *ap_name = strdup(tstart); free(tmp); if (*ap_name == NULL) return -ENOMEM; return 0; } free(tmp); if (!perm) return -EPERM; return -ENOENT; } int irm_bind_ap(const char * ap, const char * name, uint16_t opts, int argc, char ** argv) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; char * full_ap_name; if (ap == NULL || name == NULL) return -EINVAL; full_ap_name = strdup(ap); if (full_ap_name == NULL) return -ENOMEM; if ((ret = check_ap_path(&full_ap_name)) < 0) { free(full_ap_name); return ret; } msg.code = IRM_MSG_CODE__IRM_BIND_AP; msg.dst_name = (char *) name; msg.ap_name = full_ap_name; if (argv != NULL) { msg.n_args = argc; msg.args = (char **) argv; } msg.has_opts = true; msg.opts = opts; recv_msg = send_recv_irm_msg(&msg); free(full_ap_name); if (recv_msg == NULL) return -EIRMD; 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 irm_bind_api(pid_t api, const char * name) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; if (name == NULL) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_BIND_API; msg.has_api = true; msg.api = api; msg.dst_name = (char *) name; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -EIRMD; 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 irm_unbind_ap(const char * ap, const char * name) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; if (name == NULL) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_UNBIND_AP; msg.ap_name = (char *) ap; msg.dst_name = (char *) name; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -EIRMD; 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 irm_unbind_api(pid_t api, const char * name) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; if (name == NULL) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_UNBIND_API; msg.has_api = true; msg.api = api; msg.dst_name = (char *) name; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -EIRMD; 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 irm_reg(const char * name, char ** difs, size_t len) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; if (name == NULL || difs == NULL || len == 0) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_REG; msg.dst_name = (char *) name; msg.dif_name = difs; msg.n_dif_name = len; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -EIRMD; 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 irm_unreg(const char * name, char ** difs, size_t len) { irm_msg_t msg = IRM_MSG__INIT; irm_msg_t * recv_msg = NULL; int ret = -1; if (name == NULL || difs == NULL || len == 0) return -EINVAL; msg.code = IRM_MSG_CODE__IRM_UNREG; msg.dst_name = (char *) name; msg.dif_name = (char **) difs; msg.n_dif_name = len; recv_msg = send_recv_irm_msg(&msg); if (recv_msg == NULL) return -EIRMD; 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; }