diff options
Diffstat (limited to 'src/options.c')
| -rw-r--r-- | src/options.c | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/src/options.c b/src/options.c new file mode 100644 index 0000000..aba6bd6 --- /dev/null +++ b/src/options.c @@ -0,0 +1,347 @@ +/* + Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net> + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + + +#include "fastd.h" +#include "peer.h" + +#include <arpa/inet.h> + + +static int parse_log_level(fastd_context_t *ctx, const char *arg) { + if (!strcmp(arg, "fatal")) + return LOG_CRIT; + else if (!strcmp(arg, "error")) + return LOG_ERR; + else if (!strcmp(arg, "warn")) + return LOG_WARNING; + else if (!strcmp(arg, "info")) + return LOG_NOTICE; + else if (!strcmp(arg, "verbose")) + return LOG_INFO; + else if (!strcmp(arg, "debug")) + return LOG_DEBUG; + else + exit_error(ctx, "invalid log level `%s'", arg); +} + + +static void print_usage(const char *options, const char *message) { + /* 28 spaces */ + static const char spaces[] = " "; + + int len = strlen(options); + + printf("%s", options); + + if (len < 28) + printf("%s", spaces+len); + else + printf("\n%s", spaces); + + puts(message); +} + +static void usage(fastd_context_t *ctx, fastd_config_t *conf) { + puts("fastd (Fast and Secure Tunnelling Daemon) " FASTD_VERSION " usage:\n"); + +#define OR ", " +#define OPTION(func, options, message) print_usage(" " options, message) +#define OPTION_ARG(func, options, arg, message) print_usage(" " options " " arg, message) +#include "options.def.h" +#undef OR +#undef OPTION +#undef OPTION_ARG + + exit(0); +} + +static void version(fastd_context_t *ctx, fastd_config_t *conf) { + puts("fastd " FASTD_VERSION); + exit(0); +} + +static void option_user(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->user); + conf->user = strdup(arg); +} + +static void option_group(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->group); + conf->group = strdup(arg); +} + +static void option_log_level(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + conf->log_stderr_level = parse_log_level(ctx, arg); +} + +static void option_syslog_level(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + conf->log_syslog_level = parse_log_level(ctx, arg); +} + +static void option_syslog_ident(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->log_syslog_ident); + conf->log_syslog_ident = strdup(arg); +} + +static void option_hide_ip_addresses(fastd_context_t *ctx, fastd_config_t *conf) { + conf->hide_ip_addresses = true; +} + +static void option_hide_mac_addresses(fastd_context_t *ctx, fastd_config_t *conf) { + conf->hide_mac_addresses = true; +} + +static void option_config(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + if (!strcmp(arg, "-")) + arg = NULL; + + if (!fastd_read_config(ctx, conf, arg, false, 0)) + exit(1); +} + +static void option_config_peer(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + fastd_peer_config_new(ctx, conf); + + if(!fastd_read_config(ctx, conf, arg, true, 0)) + exit(1); +} + +static void option_config_peer_dir(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + fastd_add_peer_dir(ctx, conf, arg); +} + +static void option_mode(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + if (!strcmp(arg, "tap")) + conf->mode = MODE_TAP; + else if (!strcmp(arg, "tun")) + conf->mode = MODE_TUN; + else + exit_error(ctx, "invalid mode `%s'", arg); +} + +static void option_interface(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->ifname); + conf->ifname = strdup(arg); +} + +static void option_mtu(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + char *endptr; + + conf->mtu = strtol(arg, &endptr, 10); + if (*endptr || conf->mtu < 576) + exit_error(ctx, "invalid mtu `%s'", arg); +} + +static void option_bind(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + long l; + char *charptr; + char *endptr; + char *addrstr; + + if (arg[0] == '[') { + charptr = strchr(arg, ']'); + if (!charptr || (charptr[1] != ':' && charptr[1] != '\0')) + exit_error(ctx, "invalid bind address `%s'", arg); + + addrstr = strndup(arg+1, charptr-arg-1); + + if (charptr[1] == ':') + charptr++; + else + charptr = NULL; + } + else { + charptr = strchr(arg, ':'); + if (charptr) { + addrstr = strndup(arg, charptr-arg); + } + else { + addrstr = strdup(arg); + } + } + + if (charptr) { + l = strtol(charptr+1, &endptr, 10); + if (*endptr || l < 0 || l > 65535) + exit_error(ctx, "invalid bind port `%s'", charptr+1); + } + else { + l = 0; + } + + fastd_peer_address_t addr = {}; + + if (strcmp(addrstr, "any") == 0) { + /* nothing to do */ + } + else if (arg[0] == '[') { + addr.in6.sin6_family = AF_INET6; + addr.in6.sin6_port = htons(l); + + if (inet_pton(AF_INET6, addrstr, &addr.in6.sin6_addr) != 1) + exit_error(ctx, "invalid bind address `%s'", addrstr); + } + else { + addr.in.sin_family = AF_INET; + addr.in.sin_port = htons(l); + + if (inet_pton(AF_INET, addrstr, &addr.in.sin_addr) != 1) + exit_error(ctx, "invalid bind address `%s'", addrstr); + } + + free(addrstr); + + fastd_config_bind_address(ctx, conf, &addr, NULL, false, false); +} + +static void option_protocol(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + if (!fastd_config_protocol(ctx, conf, arg)) + exit_error(ctx, "invalid protocol `%s'", arg); +} + +static void option_method(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + if (!fastd_config_method(ctx, conf, arg)) + exit_error(ctx, "invalid method `%s'", arg); +} + +static void option_forward(fastd_context_t *ctx, fastd_config_t *conf) { + conf->forward = true; +} + +static void option_on_up(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->on_up); + free(conf->on_up_dir); + + conf->on_up = strdup(arg); + conf->on_up_dir = get_current_dir_name(); +} + +static void option_on_down(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->on_down); + free(conf->on_down_dir); + + conf->on_down = strdup(arg); + conf->on_down_dir = get_current_dir_name(); +} + +static void option_on_establish(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->on_establish); + free(conf->on_establish_dir); + + conf->on_establish = strdup(arg); + conf->on_establish_dir = get_current_dir_name(); +} + +static void option_on_disestablish(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->on_disestablish); + free(conf->on_disestablish_dir); + + conf->on_disestablish = strdup(arg); + conf->on_disestablish_dir = get_current_dir_name(); +} + +static void option_on_verify(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->on_verify); + free(conf->on_verify_dir); + + conf->on_verify = strdup(arg); + conf->on_verify_dir = get_current_dir_name(); +} + +static void option_daemon(fastd_context_t *ctx, fastd_config_t *conf) { + conf->daemon = true; +} + +static void option_pid_file(fastd_context_t *ctx, fastd_config_t *conf, const char *arg) { + free(conf->pid_file); + conf->pid_file = strdup(arg); +} + +static void option_generate_key(fastd_context_t *ctx, fastd_config_t *conf) { + conf->generate_key = true; + conf->show_key = false; +} + +static void option_show_key(fastd_context_t *ctx, fastd_config_t *conf) { + conf->generate_key = false; + conf->show_key = true; +} + +static void option_machine_readable(fastd_context_t *ctx, fastd_config_t *conf) { + conf->machine_readable = true; +} + + +static bool config_match(const char *opt, ...) { + va_list ap; + bool match = false; + const char *str; + + va_start(ap, opt); + + while((str = va_arg(ap, const char*)) != NULL) { + if (strcmp(opt, str) == 0) { + match = true; + break; + } + } + + va_end(ap); + + return match; +} + +void fastd_config_handle_options(fastd_context_t *ctx, fastd_config_t *conf, int argc, char *const argv[]) { + int i = 1; + + while (i < argc) { +#define OR , +#define OPTION(func, options, message) \ + ({ \ + if(config_match(argv[i], options, NULL)) { \ + i++; \ + func(ctx, conf); \ + continue; \ + } \ + }) +#define OPTION_ARG(func, options, arg, message) \ + ({ \ + if(config_match(argv[i], options, NULL)) { \ + i+=2; \ + if (i > argc) \ + exit_error(ctx, "config error: option `%s' needs an argument; see --help for usage", argv[i-2]); \ + func(ctx, conf, argv[i-1]); \ + continue; \ + } \ + }) +#include "options.def.h" +#undef OR +#undef OPTION +#undef OPTION_ARG + + exit_error(ctx, "config error: unknown option `%s'; see --help for usage", argv[i]); + } +} |