diff options
Diffstat (limited to 'src/main/radmin.c')
| -rw-r--r-- | src/main/radmin.c | 774 |
1 files changed, 774 insertions, 0 deletions
diff --git a/src/main/radmin.c b/src/main/radmin.c new file mode 100644 index 0000000..d71a2dd --- /dev/null +++ b/src/main/radmin.c @@ -0,0 +1,774 @@ +/* + * radmin.c RADIUS Administration tool. + * + * Version: $Id$ + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA + * + * Copyright 2012 The FreeRADIUS server project + * Copyright 2012 Alan DeKok <aland@deployingradius.com> + */ + +RCSID("$Id$") + +#include <freeradius-devel/radiusd.h> +#include <freeradius-devel/md5.h> +#include <freeradius-devel/channel.h> + +#include <pwd.h> +#include <grp.h> + +#ifdef HAVE_GETOPT_H +# include <getopt.h> +#endif + +#ifdef HAVE_SYS_STAT_H +# include <sys/stat.h> +#endif + +#ifndef READLINE_MAX_HISTORY_LINES +# define READLINE_MAX_HISTORY_LINES 1000 +#endif + +#ifdef HAVE_LIBREADLINE + +# include <stdio.h> +#if defined(HAVE_READLINE_READLINE_H) +# include <readline/readline.h> +# define USE_READLINE (1) +#elif defined(HAVE_READLINE_H) +# include <readline.h> +# define USE_READLINE (1) +#endif /* !defined(HAVE_READLINE_H) */ + +#ifdef HAVE_READLINE_HISTORY +# if defined(HAVE_READLINE_HISTORY_H) +# include <readline/history.h> +# define USE_READLINE_HISTORY (1) +# elif defined(HAVE_HISTORY_H) +# include <history.h> +# define USE_READLINE_HISTORY (1) +#endif /* defined(HAVE_READLINE_HISTORY_H) */ + +#endif /* HAVE_READLINE_HISTORY */ + +#endif /* HAVE_LIBREADLINE */ + +/* + * For configuration file stuff. + */ +static char const *progname = "radmin"; +static char const *radmin_version = "radmin version " RADIUSD_VERSION_STRING +#ifdef RADIUSD_VERSION_COMMIT +" (git #" STRINGIFY(RADIUSD_VERSION_COMMIT) ")" +#endif +#ifndef ENABLE_REPRODUCIBLE_BUILDS +", built on " __DATE__ " at " __TIME__ +#endif +; + + +/* + * The rest of this is because the conffile.c, etc. assume + * they're running inside of the server. And we don't (yet) + * have a "libfreeradius-server", or "libfreeradius-util". + */ +main_config_t main_config; + +static bool echo = false; +static char const *secret = "testing123"; + +#include <sys/wait.h> + +#ifdef HAVE_PTHREAD_H +pid_t rad_fork(void) +{ + return fork(); +} +pid_t rad_waitpid(pid_t pid, int *status) +{ + return waitpid(pid, status, 0); +} +#endif + +static void NEVER_RETURNS usage(int status) +{ + FILE *output = status ? stderr : stdout; + fprintf(output, "Usage: %s [ args ]\n", progname); + fprintf(output, " -d raddb_dir Configuration files are in \"raddbdir/*\".\n"); + fprintf(output, " -D <dictdir> Set main dictionary directory (defaults to " DICTDIR ").\n"); + fprintf(output, " -e command Execute 'command' and then exit.\n"); + fprintf(output, " -E Echo commands as they are being executed.\n"); + fprintf(output, " -f socket_file Open socket_file directly, without reading radius.conf\n"); + fprintf(output, " -h Print usage help information.\n"); + fprintf(output, " -i input_file Read commands from 'input_file'.\n"); + fprintf(output, " -n name Read raddb/name.conf instead of raddb/radiusd.conf\n"); + fprintf(output, " -q Quiet mode.\n"); + fprintf(output, " -v Show program version information.\n"); + + exit(status); +} + +static int client_socket(char const *server) +{ + int sockfd; + uint16_t port; + fr_ipaddr_t ipaddr; + char *p, buffer[1024]; + + strlcpy(buffer, server, sizeof(buffer)); + + p = strchr(buffer, ':'); + if (!p) { + port = PW_RADMIN_PORT; + } else { + port = atoi(p + 1); + *p = '\0'; + } + + if (ip_hton(&ipaddr, AF_INET, buffer, false) < 0) { + fprintf(stderr, "%s: Failed looking up host %s: %s\n", + progname, buffer, fr_syserror(errno)); + exit(1); + } + + sockfd = fr_socket_client_tcp(NULL, &ipaddr, port, false); + if (sockfd < 0) { + fprintf(stderr, "%s: Failed opening socket %s: %s\n", + progname, server, fr_syserror(errno)); + exit(1); + } + + return sockfd; +} + +static ssize_t do_challenge(int sockfd) +{ + ssize_t r; + fr_channel_type_t channel; + uint8_t challenge[16]; + + challenge[0] = 0; + + /* + * When connecting over a socket, the server challenges us. + */ + r = fr_channel_read(sockfd, &channel, challenge, sizeof(challenge)); + if (r <= 0) return r; + + if ((r != 16) || (channel != FR_CHANNEL_AUTH_CHALLENGE)) { + fprintf(stderr, "%s: Failed to read challenge.\n", + progname); + exit(1); + } + + fr_hmac_md5(challenge, (uint8_t const *) secret, strlen(secret), + challenge, sizeof(challenge)); + + r = fr_channel_write(sockfd, FR_CHANNEL_AUTH_RESPONSE, challenge, sizeof(challenge)); + if (r <= 0) return r; + + /* + * If the server doesn't like us, he just closes the + * socket. So we don't look for an ACK. + */ + + return r; +} + + +/* + * Returns -1 on error. 0 on connection failed. +1 on OK. + */ +static ssize_t run_command(int sockfd, char const *command, + char *buffer, size_t bufsize) +{ + ssize_t r; + uint32_t status; + fr_channel_type_t channel; + + if (echo) { + fprintf(stdout, "%s\n", command); + } + + /* + * Write the text to the socket. + */ + r = fr_channel_write(sockfd, FR_CHANNEL_STDIN, command, strlen(command)); + if (r <= 0) return r; + + while (true) { + r = fr_channel_read(sockfd, &channel, buffer, bufsize - 1); + if (r <= 0) return r; + + buffer[r] = '\0'; /* for C strings */ + + switch (channel) { + case FR_CHANNEL_STDOUT: + fprintf(stdout, "%s", buffer); + break; + + case FR_CHANNEL_STDERR: + fprintf(stderr, "ERROR: %s", buffer); + break; + + case FR_CHANNEL_CMD_STATUS: + if (r < 4) return 1; + + memcpy(&status, buffer, sizeof(status)); + status = ntohl(status); + return status; + + default: + fprintf(stderr, "Unexpected response\n"); + return -1; + } + } + + /* never gets here */ +} + +static int do_connect(int *out, char const *file, char const *server) +{ + int sockfd; + ssize_t r; + fr_channel_type_t channel; + char buffer[65536]; + + uint32_t magic; + + /* + * Close stale file descriptors + */ + if (*out != -1) { + close(*out); + *out = -1; + } + + if (file) { + /* + * FIXME: Get destination from command line, if possible? + */ + sockfd = fr_socket_client_unix(file, false); + if (sockfd < 0) { + fr_perror("radmin"); + if (errno == ENOENT) { + fprintf(stderr, "Perhaps you need to run the commands:"); + fprintf(stderr, "\tcd /etc/raddb\n"); + fprintf(stderr, "\tln -s sites-available/control-socket " + "sites-enabled/control-socket\n"); + fprintf(stderr, "and then re-start the server?\n"); + } + return -1; + } + } else { + sockfd = client_socket(server); + } + + /* + * Only works for BSD, but Linux allows us + * to mask SIGPIPE, so that's fine. + */ +#ifdef SO_NOSIGPIPE + { + int set = 1; + + setsockopt(sockfd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&set, sizeof(int)); + } +#endif + + /* + * Set up the initial header data. + */ + magic = 0xf7eead16; + magic = htonl(magic); + memcpy(buffer, &magic, sizeof(magic)); + memset(buffer + sizeof(magic), 0, sizeof(magic)); + + r = fr_channel_write(sockfd, FR_CHANNEL_INIT_ACK, buffer, 8); + if (r <= 0) { + do_close: + fprintf(stderr, "%s: Error in socket: %s\n", + progname, fr_syserror(errno)); + close(sockfd); + return -1; + } + + r = fr_channel_read(sockfd, &channel, buffer + 8, 8); + if (r <= 0) goto do_close; + + if ((r != 8) || (channel != FR_CHANNEL_INIT_ACK) || + (memcmp(buffer, buffer + 8, 8) != 0)) { + fprintf(stderr, "%s: Incompatible versions\n", progname); + close(sockfd); + return -1; + } + + if (server && secret) { + r = do_challenge(sockfd); + if (r <= 0) goto do_close; + } + + *out = sockfd; + + return 0; +} + +#define MAX_COMMANDS (4) + +int main(int argc, char **argv) +{ + int argval; + bool quiet = false; + int sockfd = -1; + char *line = NULL; + ssize_t len; + char const *file = NULL; + char const *name = "radiusd"; + char *p, buffer[65536]; + char const *input_file = NULL; + FILE *inputfp = stdin; + char const *server = NULL; + + char const *radius_dir = RADIUS_DIR; + char const *dict_dir = DICTDIR; +#ifdef USE_READLINE_HISTORY + char history_file[PATH_MAX]; +#endif + + char *commands[MAX_COMMANDS]; + int num_commands = -1; + + int exit_status = EXIT_SUCCESS; + +#ifndef NDEBUG + if (fr_fault_setup(getenv("PANIC_ACTION"), argv[0]) < 0) { + fr_perror("radmin"); + exit(EXIT_FAILURE); + } +#endif + + talloc_set_log_stderr(); + + if ((progname = strrchr(argv[0], FR_DIR_SEP)) == NULL) { + progname = argv[0]; + } else { + progname++; + } + + while ((argval = getopt(argc, argv, "d:D:hi:e:Ef:n:qs:vS")) != EOF) { + switch (argval) { + case 'd': + if (file) { + fprintf(stderr, "%s: -d and -f cannot be used together.\n", progname); + exit(1); + } + if (server) { + fprintf(stderr, "%s: -d and -s cannot be used together.\n", progname); + exit(1); + } + radius_dir = optarg; + break; + + case 'D': + dict_dir = optarg; + break; + + case 'e': + num_commands++; /* starts at -1 */ + if (num_commands >= MAX_COMMANDS) { + fprintf(stderr, "%s: Too many '-e'\n", + progname); + exit(1); + } + + commands[num_commands] = optarg; + break; + + case 'E': + echo = true; + break; + + case 'f': + radius_dir = NULL; + file = optarg; + break; + + default: + case 'h': + usage(0); /* never returns */ + + case 'i': +#ifdef __clang_analyzer__ + if (!optarg) exit(1); +#endif + + if (strcmp(optarg, "-") != 0) { + input_file = optarg; + } + quiet = true; + break; + + case 'n': + name = optarg; + break; + + case 'q': + quiet = true; + break; + + case 's': + if (file) { + fprintf(stderr, "%s: -s and -f cannot be used together.\n", progname); + usage(1); + } + radius_dir = NULL; + server = optarg; + break; + + case 'S': + secret = NULL; + break; + + case 'v': + printf("%s\n", radmin_version); + exit(EXIT_SUCCESS); + break; + } + } + + /* + * Mismatch between the binary and the libraries it depends on + */ + if (fr_check_lib_magic(RADIUSD_MAGIC_NUMBER) < 0) { + fr_perror("radmin"); + exit(1); + } + + if (radius_dir) { + int rcode; + CONF_SECTION *cs, *subcs; + uid_t uid; + gid_t gid; + char const *uid_name = NULL; + char const *gid_name = NULL; + struct passwd *pwd; + struct group *grp; + + file = NULL; /* MUST read it from the conffile now */ + + snprintf(buffer, sizeof(buffer), "%s/%s.conf", radius_dir, name); + + /* + * Need to read in the dictionaries, else we may get + * validation errors when we try and parse the config. + */ + if (dict_init(dict_dir, RADIUS_DICTIONARY) < 0) { + fr_perror("radmin"); + exit(64); + } + + if (dict_read(radius_dir, RADIUS_DICTIONARY) == -1) { + fr_perror("radmin"); + exit(64); + } + + cs = cf_section_alloc(NULL, "main", NULL); + if (!cs) exit(1); + + if (cf_file_read(cs, buffer) < 0) { + fprintf(stderr, "%s: Errors reading or parsing %s\n", progname, buffer); + talloc_free(cs); + usage(1); + } + + uid = getuid(); + gid = getgid(); + + subcs = NULL; + while ((subcs = cf_subsection_find_next(cs, subcs, "listen")) != NULL) { + char const *value; + CONF_PAIR *cp = cf_pair_find(subcs, "type"); + + if (!cp) continue; + + value = cf_pair_value(cp); + if (!value) continue; + + if (strcmp(value, "control") != 0) continue; + + /* + * Now find the socket name (sigh) + */ + rcode = cf_item_parse(subcs, "socket", FR_ITEM_POINTER(PW_TYPE_STRING, &file), NULL); + if (rcode < 0) { + fprintf(stderr, "%s: Failed parsing listen section 'socket'\n", progname); + exit(1); + } + + if (!file) { + fprintf(stderr, "%s: No path given for socket\n", progname); + usage(1); + } + + /* + * If we're root, just use the first one we find + */ + if (uid == 0) break; + + /* + * Check UID and GID. + */ + rcode = cf_item_parse(subcs, "uid", FR_ITEM_POINTER(PW_TYPE_STRING, &uid_name), NULL); + if (rcode < 0) { + fprintf(stderr, "%s: Failed parsing listen section 'uid'\n", progname); + exit(1); + } + + if (!uid_name) break; + + pwd = getpwnam(uid_name); + if (!pwd) { + fprintf(stderr, "%s: Failed getting UID for user %s: %s\n", progname, uid_name, strerror(errno)); + exit(1); + } + + if (uid != pwd->pw_uid) continue; + + rcode = cf_item_parse(subcs, "gid", FR_ITEM_POINTER(PW_TYPE_STRING, &gid_name), NULL); + if (rcode < 0) { + fprintf(stderr, "%s: Failed parsing listen section 'gid'\n", progname); + exit(1); + } + + if (!gid_name) break; + + grp = getgrnam(gid_name); + if (!grp) { + fprintf(stderr, "%s: Failed getting GID for group %s: %s\n", progname, gid_name, strerror(errno)); + exit(1); + } + + if (gid != grp->gr_gid) continue; + + break; + } + + if (!file) { + fprintf(stderr, "%s: Could not find control socket in %s\n", progname, buffer); + exit(1); + } + } + + if (input_file) { + inputfp = fopen(input_file, "r"); + if (!inputfp) { + fprintf(stderr, "%s: Failed opening %s: %s\n", progname, input_file, fr_syserror(errno)); + exit(1); + } + } + + if (!file && !server) { + fprintf(stderr, "%s: Must use one of '-d' or '-f' or '-s'\n", + progname); + exit(1); + } + + /* + * Check if stdin is a TTY only if input is from stdin + */ + if (input_file && !quiet && !isatty(STDIN_FILENO)) quiet = true; + +#ifdef USE_READLINE + if (!quiet) { +#ifdef USE_READLINE_HISTORY + using_history(); + stifle_history(READLINE_MAX_HISTORY_LINES); + + snprintf(history_file, sizeof(history_file), "%s/%s", getenv("HOME"), ".radmin_history"); + read_history(history_file); +#endif + rl_bind_key('\t', rl_insert); + } +#endif + + /* + * Prevent SIGPIPEs from terminating the process + */ + signal(SIGPIPE, SIG_IGN); + + if (do_connect(&sockfd, file, server) < 0) exit(1); + + /* + * Run one command. + */ + if (num_commands >= 0) { + int i; + + for (i = 0; i <= num_commands; i++) { + len = run_command(sockfd, commands[i], buffer, sizeof(buffer)); + if (len < 0) exit(1); + + if (len == FR_CHANNEL_FAIL) exit_status = EXIT_FAILURE; + } + exit(exit_status); + } + + if (!quiet) { + printf("%s - FreeRADIUS Server administration tool.\n", radmin_version); + printf("Copyright (C) 2008-2019 The FreeRADIUS server project and contributors.\n"); + printf("There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n"); + printf("PARTICULAR PURPOSE.\n"); + printf("You may redistribute copies of FreeRADIUS under the terms of the\n"); + printf("GNU General Public License v2.\n"); + } + + /* + * FIXME: Do login? + */ + + while (1) { + int retries; + +#ifndef USE_READLINE + if (!quiet) { + printf("radmin> "); + fflush(stdout); + } +#else + if (!quiet) { + line = readline("radmin> "); + + if (!line) break; + + if (!*line) { + free(line); + continue; + } + +#ifdef USE_READLINE_HISTORY + add_history(line); + write_history(history_file); +#endif + } else /* quiet, or no readline */ +#endif + { + line = fgets(buffer, sizeof(buffer), inputfp); + if (!line) break; + + p = strchr(buffer, '\n'); + if (!p) { + fprintf(stderr, "%s: Input line too long\n", + progname); + exit(1); + } + + *p = '\0'; + + /* + * Strip off leading spaces. + */ + for (p = line; *p != '\0'; p++) { + if ((p[0] == ' ') || + (p[0] == '\t')) { + line = p + 1; + continue; + } + + if (p[0] == '#') { + line = NULL; + break; + } + + break; + } + + /* + * Comments: keep going. + */ + if (!line) continue; + + /* + * Strip off CR / LF + */ + for (p = line; *p != '\0'; p++) { + if ((p[0] == '\r') || + (p[0] == '\n')) { + p[0] = '\0'; + break; + } + } + } + + if (strcmp(line, "reconnect") == 0) { + if (do_connect(&sockfd, file, server) < 0) exit(1); + line = NULL; + continue; + } + + if (strncmp(line, "secret ", 7) == 0) { + if (!secret) { + secret = line + 7; + do_challenge(sockfd); + } + line = NULL; + continue; + } + + /* + * Exit, done, etc. + */ + if ((strcmp(line, "exit") == 0) || + (strcmp(line, "quit") == 0)) { + break; + } + + if (server && !secret) { + fprintf(stderr, "ERROR: You must enter 'secret <SECRET>' before running any commands\n"); + line = NULL; + continue; + } + + retries = 0; + retry: + len = run_command(sockfd, line, buffer, sizeof(buffer)); + if (len < 0) { + if (!quiet) fprintf(stderr, "... reconnecting ...\n"); + + if (do_connect(&sockfd, file, server) < 0) { + exit(1); + } + + retries++; + if (retries < 2) goto retry; + + fprintf(stderr, "Failed to connect to server\n"); + exit(1); + + } else if (len == FR_CHANNEL_SUCCESS) { + break; + + } else if (len == FR_CHANNEL_FAIL) { + exit_status = EXIT_FAILURE; + } + } + + fprintf(stdout, "\n"); + + if (inputfp != stdin) fclose(inputfp); + + return exit_status; +} + |