diff options
Diffstat (limited to 'ctrl/facemgr/src/cfg_file.c')
| -rw-r--r-- | ctrl/facemgr/src/cfg_file.c | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/ctrl/facemgr/src/cfg_file.c b/ctrl/facemgr/src/cfg_file.c new file mode 100644 index 000000000..5c187e0a2 --- /dev/null +++ b/ctrl/facemgr/src/cfg_file.c @@ -0,0 +1,548 @@ +/* + * Copyright (c) 2017-2019 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/** + * \file cfg_file.c + * \brief Implementation of configuration file parsing + */ + +#include <unistd.h> // access +#include <libconfig.h> +#include "cfg_file.h" + +#define ARRAYSIZE(x) (sizeof(x)/sizeof(*x)) + +static const char * DEFAULT_CFGFILES[] = { + "/etc/facemgr.conf", + "~/facemgr.conf", +}; + +int +probe_cfgfile(char * f) +{ + for (unsigned i = 0; i < ARRAYSIZE(DEFAULT_CFGFILES); i++) { + if (access(DEFAULT_CFGFILES[i], F_OK ) != -1) { + if (!realpath(DEFAULT_CFGFILES[i], f)) + continue; + return 0; + } + } + return -1; +} + +int +parse_config_global(facemgr_cfg_t * cfg, config_setting_t * setting) +{ + /* - face_type */ + + const char *face_type_str; + facemgr_face_type_t face_type; + if (config_setting_lookup_string(setting, "face_type", &face_type_str)) { + if (strcasecmp(face_type_str, "auto") == 0) { + face_type = FACEMGR_FACE_TYPE_DEFAULT; + } else + if (strcasecmp(face_type_str, "native-udp") == 0) { + face_type = FACEMGR_FACE_TYPE_NATIVE_UDP; + } else + if (strcasecmp(face_type_str, "native-tcp") == 0) { + face_type = FACEMGR_FACE_TYPE_NATIVE_TCP; + } else + if (strcasecmp(face_type_str, "overlay-udp") == 0) { + face_type = FACEMGR_FACE_TYPE_OVERLAY_UDP; + } else + if (strcasecmp(face_type_str, "overlay-tcp") == 0) { + face_type = FACEMGR_FACE_TYPE_OVERLAY_TCP; + } else { + ERROR("Invalid face type in section 'global'"); + return -1; + } + + int rc = facemgr_cfg_set_face_type(cfg, &face_type); + if (rc < 0) + goto ERR; + } + + /* - disable_discovery */ + + int disable_discovery; + if (config_setting_lookup_bool(setting, "disable_discovery", + &disable_discovery)) { + int rc = facemgr_cfg_set_discovery(cfg, !disable_discovery); + if (rc < 0) + goto ERR; + } + + /* - disable_ipv4 */ + + int disable_ipv4; + if (config_setting_lookup_bool(setting, "disable_ipv4", + &disable_ipv4)) { + int rc = facemgr_cfg_set_ipv4(cfg, !disable_ipv4); + if (rc < 0) + goto ERR; + } + + /* - disable ipv6 */ + + int disable_ipv6; + if (config_setting_lookup_bool(setting, "disable_ipv6", + &disable_ipv6)) { + int rc = facemgr_cfg_set_ipv6(cfg, !disable_ipv6); + if (rc < 0) + goto ERR; + } + + /* - overlay */ + config_setting_t *overlay = config_setting_get_member(setting, "overlay"); + if (overlay) { + + /* ipv4 */ + config_setting_t *overlay_v4 = config_setting_get_member(overlay, "ipv4"); + if (overlay_v4) { + const char * local_addr_str, * remote_addr_str; + ip_address_t local_addr = IP_ADDRESS_EMPTY; + ip_address_t remote_addr = IP_ADDRESS_EMPTY; + ip_address_t * local_addr_p = NULL; + ip_address_t * remote_addr_p = NULL; + int local_port = 0; + int remote_port = 0; + + if (config_setting_lookup_string(overlay_v4, "local_addr", &local_addr_str)) { + if (ip_address_pton(local_addr_str, &local_addr) < 0) { + ERROR("Error parsing v4 local addr"); + goto ERR; + } + local_addr_p = &local_addr; + } + + if (config_setting_lookup_int(overlay_v4, "local_port", &local_port)) { + if (!IS_VALID_PORT(local_port)) + goto ERR; + } + + if (config_setting_lookup_string(overlay_v4, "remote_addr", &remote_addr_str)) { + if (ip_address_pton(remote_addr_str, &remote_addr) < 0) { + ERROR("Error parsing v4 remote addr"); + goto ERR; + } + remote_addr_p = &remote_addr; + } + + if (config_setting_lookup_int(overlay_v4, "remote_port", &remote_port)) { + if (!IS_VALID_PORT(remote_port)) + goto ERR; + } + int rc = facemgr_cfg_set_overlay(cfg, AF_INET, + local_addr_p, local_port, + remote_addr_p, remote_port); + if (rc < 0) + goto ERR; + } + + /* ipv6 */ + config_setting_t *overlay_v6 = config_setting_get_member(overlay, "ipv6"); + if (overlay_v6) { + const char * local_addr_str, * remote_addr_str; + ip_address_t local_addr = IP_ADDRESS_EMPTY; + ip_address_t remote_addr = IP_ADDRESS_EMPTY; + ip_address_t * local_addr_p = NULL; + ip_address_t * remote_addr_p = NULL; + int local_port = 0; + int remote_port = 0; + + if (config_setting_lookup_string(overlay_v6, "local_addr", &local_addr_str)) { + if (ip_address_pton(local_addr_str, &local_addr) < 0) { + ERROR("Error parsing v6 local addr"); + goto ERR; + } + local_addr_p = &local_addr; + } + + if (config_setting_lookup_int(overlay_v6, "local_port", &local_port)) { + if (!IS_VALID_PORT(local_port)) + goto ERR; + } + + if (config_setting_lookup_string(overlay_v6, "remote_addr", &remote_addr_str)) { + if (ip_address_pton(remote_addr_str, &remote_addr) < 0) { + ERROR("Error parsing v6 remote addr"); + goto ERR; + } + remote_addr_p = &remote_addr; + } + + if (config_setting_lookup_int(overlay_v6, "remote_port", &remote_port)) { + if (!IS_VALID_PORT(remote_port)) + goto ERR; + } + int rc = facemgr_cfg_set_overlay(cfg, AF_INET6, + local_addr_p, local_port, + remote_addr_p, remote_port); + if (rc < 0) + goto ERR; + } + + } /* overlay */ + + return 0; + +ERR: + return -1; +} + +int +parse_config_rules(facemgr_cfg_t * cfg, config_setting_t * setting) +{ + /* List of match-override tuples */ + facemgr_cfg_rule_t * rule; + + int count = config_setting_length(setting); + for (unsigned i = 0; i < count; ++i) { + config_setting_t * rule_setting = config_setting_get_elem(setting, i); + + /* Sanity check */ + + config_setting_t * match_setting = config_setting_get_member(rule_setting, "match"); + if (!match_setting) { + ERROR("Missing match section in rule #%d", i); + goto ERR_CHECK; + } + + config_setting_t * override_setting = config_setting_get_member(rule_setting, "override"); + if (!override_setting) { + ERROR("Missing override section in rule #%d", i); + goto ERR_CHECK; + } + + rule = facemgr_cfg_rule_create(); + if (!rule) + goto ERR_RULE; + + /* Parse match */ + + const char * interface_name = NULL; + config_setting_lookup_string(match_setting, "interface_name", &interface_name); + + const char * interface_type_str; + netdevice_type_t interface_type = NETDEVICE_TYPE_UNDEFINED; + if (config_setting_lookup_string(match_setting, "interface_type", &interface_type_str)) { + if (strcasecmp(interface_type_str, "wired") == 0) { + interface_type = NETDEVICE_TYPE_WIRED; + } else + if (strcasecmp(interface_type_str, "wifi") == 0) { + interface_type = NETDEVICE_TYPE_WIFI; + } else + if (strcasecmp(interface_type_str, "cellular") == 0) { + interface_type = NETDEVICE_TYPE_CELLULAR; + } else { + ERROR("Unknown interface type in rule #%d", i); + goto ERR; + } + } + + if ((!interface_name) && (interface_type == NETDEVICE_TYPE_UNDEFINED)) { + ERROR("Empty match section in rule #%d", i); + goto ERR; + } + + /* Associate match to rule */ + + int rc = facemgr_cfg_rule_set_match(rule, interface_name, interface_type); + if (rc < 0) + goto ERR; + + /* Parse override */ + + /* - face_type */ + + const char *face_type_str; + facemgr_face_type_t face_type; + if (config_setting_lookup_string(override_setting, "face_type", &face_type_str)) { + if (strcasecmp(face_type_str, "auto")) { + /* We currently hardcode different behaviours based on the OS */ +#ifdef __ANDROID__ + face_type = FACEMGR_FACE_TYPE_OVERLAY_UDP; +#else + face_type = FACEMGR_FACE_TYPE_NATIVE_TCP; +#endif + } else + if (strcasecmp(face_type_str, "native-udp") == 0) { + face_type = FACEMGR_FACE_TYPE_NATIVE_UDP; + } else + if (strcasecmp(face_type_str, "native-tcp") == 0) { + face_type = FACEMGR_FACE_TYPE_NATIVE_TCP; + } else + if (strcasecmp(face_type_str, "overlay-udp") == 0) { + face_type = FACEMGR_FACE_TYPE_OVERLAY_UDP; + } else + if (strcasecmp(face_type_str, "overlay-tcp") == 0) { + face_type = FACEMGR_FACE_TYPE_OVERLAY_TCP; + } else { + ERROR("Invalid face type in section 'global'"); + return -1; + } + + int rc = facemgr_cfg_rule_set_face_type(rule, &face_type); + if (rc < 0) + goto ERR; + } + + /* - disable_discovery */ + + int disable_discovery; + if (config_setting_lookup_bool(override_setting, "disable_discovery", + &disable_discovery)) { + int rc = facemgr_cfg_rule_set_discovery(rule, !disable_discovery); + if (rc < 0) + goto ERR; + } + + /* - disable_ipv4 */ + + int disable_ipv4; + if (config_setting_lookup_bool(override_setting, "disable_ipv4", + &disable_ipv4)) { + INFO("Ignored setting 'disable_ipv4' in rule #%d (not implemented).", i); +#if 0 + int rc = facemgr_cfg_rule_set_ipv4(rule, !disable_ipv4); + if (rc < 0) + goto ERR; +#endif + } + + /* - disable ipv6 */ + + int disable_ipv6; + if (config_setting_lookup_bool(override_setting, "disable_ipv6", + &disable_ipv6)) { + INFO("Ignored setting 'disable_ipv6' in rule #%d (not implemented).", i); +#if 0 + int rc = facemgr_cfg_rule_set_ipv6(rule, !disable_ipv6); + if (rc < 0) + goto ERR; +#endif + } + + /* - ignore */ + int ignore; + if (config_setting_lookup_bool(override_setting, "ignore", &ignore)) { + int rc = facemgr_cfg_rule_set_ignore(rule, !!ignore); + if (rc < 0) + goto ERR; + } + + /* - tags */ + config_setting_t *tag_settings = config_setting_get_member(override_setting, "tags"); + if (tag_settings) { + INFO("Ignored setting 'tags' in rule #%d (not implemented).", i); +#if 0 + policy_tags_t tags = POLICY_TAGS_EMPTY; + for (unsigned j = 0; j < config_setting_length(tag_settings); j++) { + const char * tag_str = config_setting_get_string_elem(tag_settings, j); + policy_tag_t tag = policy_tag_from_str(tag_str); + if (tag == POLICY_TAG_N) + goto ERR; + policy_tags_add(&tags, tag); + } + + int rc = facemgr_cfg_rule_set_tags(rule, tags); + if (rc < 0) + goto ERR; + +#if 0 + char tags_str[MAXSZ_POLICY_TAGS]; + policy_tags_snprintf(tags_str, MAXSZ_POLICY_TAGS, tags); + DEBUG("Added tags tags=%s", tags_str); +#endif +#endif + } + + /* - overlay */ + config_setting_t *overlay = config_setting_get_member(override_setting, "overlay"); + if (overlay) { + + /* ipv4 */ + config_setting_t *overlay_v4 = config_setting_get_member(overlay, "ipv4"); + if (overlay_v4) { + const char * local_addr_str, * remote_addr_str; + ip_address_t local_addr = IP_ADDRESS_EMPTY; + ip_address_t remote_addr = IP_ADDRESS_EMPTY; + ip_address_t * local_addr_p = NULL; + ip_address_t * remote_addr_p = NULL; + int local_port = 0; + int remote_port = 0; + + if (config_setting_lookup_string(overlay_v4, "local_addr", &local_addr_str)) { + ip_address_pton(local_addr_str, &local_addr); + local_addr_p = &local_addr; + } + + if (config_setting_lookup_int(overlay_v4, "local_port", &local_port)) { + if (!IS_VALID_PORT(local_port)) + goto ERR; + } + + if (config_setting_lookup_string(overlay_v4, "remote_addr", &remote_addr_str)) { + ip_address_pton(remote_addr_str, &remote_addr); + remote_addr_p = &remote_addr; + } + + if (config_setting_lookup_int(overlay_v4, "remote_port", &remote_port)) { + if (!IS_VALID_PORT(remote_port)) + goto ERR; + } + int rc = facemgr_cfg_rule_set_overlay(rule, AF_INET, + local_addr_p, local_port, + remote_addr_p, remote_port); + if (rc < 0) + goto ERR; + } + + /* ipv6 */ + config_setting_t *overlay_v6 = config_setting_get_member(overlay, "ipv6"); + if (overlay_v6) { + const char * local_addr_str, * remote_addr_str; + ip_address_t local_addr = IP_ADDRESS_EMPTY; + ip_address_t remote_addr = IP_ADDRESS_EMPTY; + ip_address_t * local_addr_p = NULL; + ip_address_t * remote_addr_p = NULL; + int local_port = 0; + int remote_port = 0; + + if (config_setting_lookup_string(overlay_v6, "local_addr", &local_addr_str)) { + ip_address_pton(local_addr_str, &local_addr); + local_addr_p = &local_addr; + } + + if (config_setting_lookup_int(overlay_v6, "local_port", &local_port)) { + if (!IS_VALID_PORT(local_port)) + goto ERR; + } + + if (config_setting_lookup_string(overlay_v6, "remote_addr", &remote_addr_str)) { + ip_address_pton(remote_addr_str, &remote_addr); + remote_addr_p = &remote_addr; + } + + if (config_setting_lookup_int(overlay_v6, "remote_port", &remote_port)) { + if (!IS_VALID_PORT(remote_port)) + goto ERR; + } + int rc = facemgr_cfg_rule_set_overlay(rule, AF_INET6, + local_addr_p, local_port, + remote_addr_p, remote_port); + if (rc < 0) + goto ERR; + } + + } /* overlay */ + + /* Add newly created rule */ + + rc = facemgr_cfg_add_rule(cfg, rule); + if (rc < 0) + goto ERR; + } + return 0; + +ERR: + facemgr_cfg_rule_free(rule); +ERR_RULE: +ERR_CHECK: + return -1; +} + +/* Currently not using facemgr_cfg_t */ +int +parse_config_log(facemgr_cfg_t * cfg, config_setting_t * setting) +{ + const char *log_level_str; + if (config_setting_lookup_string(setting, "log_level", &log_level_str)) { + if (strcasecmp(log_level_str, "FATAL") == 0) { + log_conf.log_level = LOG_FATAL; + } else + if (strcasecmp(log_level_str, "ERROR") == 0) { + log_conf.log_level = LOG_ERROR; + } else + if (strcasecmp(log_level_str, "WARN") == 0) { + log_conf.log_level = LOG_WARN; + } else + if (strcasecmp(log_level_str, "INFO") == 0) { + log_conf.log_level = LOG_INFO; + } else + if (strcasecmp(log_level_str, "DEBUG") == 0) { + log_conf.log_level = LOG_DEBUG; + } else + if (strcasecmp(log_level_str, "TRACE") == 0) { + log_conf.log_level = LOG_TRACE; + } else { + ERROR("Invalid log level in section 'log'"); + return -1; + } + } + return 0; +} + +int +parse_config_file(const char * cfgpath, facemgr_cfg_t * cfg) +{ + /* Reading configuration file */ + config_t cfgfile; + config_setting_t *setting; + + config_init(&cfgfile); + + /* Read the file. If there is an error, report it and exit. */ + if(!config_read_file(&cfgfile, cfgpath)) + goto ERR_FILE; + + setting = config_lookup(&cfgfile, "global"); + if (setting) { + int rc = parse_config_global(cfg, setting); + if (rc < 0) + goto ERR_PARSE; + } + + setting = config_lookup(&cfgfile, "rules"); + if (setting) { + int rc = parse_config_rules(cfg, setting); + if (rc < 0) + goto ERR_PARSE; + } + + setting = config_lookup(&cfgfile, "log"); + if (setting) { + int rc = parse_config_log(cfg, setting); + if (rc < 0) + goto ERR_PARSE; + } + + config_destroy(&cfgfile); + return 0; + +ERR_FILE: + ERROR("Could not read configuration file %s", cfgpath); + fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfgfile), + config_error_line(&cfgfile), config_error_text(&cfgfile)); + config_destroy(&cfgfile); + exit(EXIT_FAILURE); + return -1; +ERR_PARSE: + fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfgfile), + config_error_line(&cfgfile), config_error_text(&cfgfile)); + config_destroy(&cfgfile); + return -1; +} + |