/
radmin.c
823 lines (680 loc) · 17 KB
/
radmin.c
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/*
* 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>
#ifdef HAVE_SYS_UN_H
# include <sys/un.h>
# ifndef SUN_LEN
# define SUN_LEN(su) (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
# endif
#endif
#ifdef HAVE_GETOPT_H
# include <getopt.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_LIBREADLINE
#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.
*/
char const *progname = "radmin";
static char const *radmin_version = "radmin version " RADIUSD_VERSION_STRING
#ifdef RADIUSD_VERSION_COMMIT
" (git #" STRINGIFY(RADIUSD_VERSION_COMMIT) ")"
#endif
", built on " __DATE__ " at " __TIME__;
/*
* 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".
*/
log_lvl_t debug_flag = 0;
struct main_config_t main_config;
bool check_config = false;
static FILE *outputfp = NULL;
static bool echo = false;
static char const *secret = "testing123";
#include <sys/wait.h>
pid_t rad_fork(void)
{
return fork();
}
#ifdef HAVE_PTHREAD_H
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(stderr, " -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, " -o output_file Write commands to 'output_file'.\n");
fprintf(output, " -q Quiet mode.\n");
exit(status);
}
static int fr_domain_socket(char const *path)
{
int sockfd = -1;
#ifdef HAVE_SYS_UN_H
size_t len;
socklen_t socklen;
struct sockaddr_un saremote;
len = strlen(path);
if (len >= sizeof(saremote.sun_path)) {
fprintf(stderr, "%s: Path too long in filename\n", progname);
return -1;
}
if ((sockfd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
fprintf(stderr, "%s: Failed creating socket: %s\n",
progname, fr_syserror(errno));
return -1;
}
saremote.sun_family = AF_UNIX;
memcpy(saremote.sun_path, path, len + 1); /* SUN_LEN does strlen */
socklen = SUN_LEN(&saremote);
if (connect(sockfd, (struct sockaddr *)&saremote, socklen) < 0) {
struct stat buf;
close(sockfd);
fprintf(stderr, "%s: Failed connecting to %s: %s\n",
progname, path, fr_syserror(errno));
/*
* The file doesn't exist. Tell the user how to
* fix it.
*/
if ((stat(path, &buf) < 0) &&
(errno == ENOENT)) {
fprintf(stderr, " Perhaps you need to run the commands:\n\tcd /etc/raddb\n\tln -s sites-available/control-socket sites-enabled/control-socket\n and then re-start the server?\n");
}
return -1;
}
#ifdef O_NONBLOCK
{
int flags;
if ((flags = fcntl(sockfd, F_GETFL, NULL)) < 0) {
fprintf(stderr, "%s: Failure getting socket flags: %s",
progname, fr_syserror(errno));
close(sockfd);
return -1;
}
flags |= O_NONBLOCK;
if( fcntl(sockfd, F_SETFL, flags) < 0) {
fprintf(stderr, "%s: Failure setting socket flags: %s",
progname, fr_syserror(errno));
close(sockfd);
return -1;
}
}
#endif
#endif
return sockfd;
}
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_tcp_client_socket(NULL, &ipaddr, port);
if (sockfd < 0) {
fprintf(stderr, "%s: Failed opening socket %s: %s\n",
progname, server, fr_syserror(errno));
exit(1);
}
return sockfd;
}
static void do_challenge(int sockfd)
{
size_t total;
ssize_t r;
uint8_t challenge[16];
for (total = 0; total < sizeof(challenge); ) {
r = read(sockfd, challenge + total, sizeof(challenge) - total);
if (r == 0) exit(1);
if (r < 0) {
#ifdef ECONNRESET
if (errno == ECONNRESET) {
fprintf(stderr, "%s: Connection reset",
progname);
exit(1);
}
#endif
if (errno == EINTR) continue;
fprintf(stderr, "%s: Failed reading data: %s\n",
progname, fr_syserror(errno));
exit(1);
}
total += r;
fflush(stdout);
}
fr_hmac_md5(challenge, (uint8_t const *) secret, strlen(secret),
challenge, sizeof(challenge));
if (write(sockfd, challenge, sizeof(challenge)) < 0) {
fprintf(stderr, "%s: Failed writing challenge data: %s\n",
progname, fr_syserror(errno));
}
}
static ssize_t run_command(int sockfd, char const *command,
char *buffer, size_t bufsize)
{
char *p;
ssize_t size, len;
if (echo) {
fprintf(outputfp, "%s\n", command);
}
/*
* Write the text to the socket.
*/
if (write(sockfd, command, strlen(command)) < 0) return -1;
if (write(sockfd, "\r\n", 2) < 0) return -1;
/*
* Read the response
*/
size = 0;
buffer[0] = '\0';
memset(buffer, 0, bufsize);
while (1) {
int rcode;
fd_set readfds;
FD_ZERO(&readfds);
FD_SET(sockfd, &readfds);
rcode = select(sockfd + 1, &readfds, NULL, NULL, NULL);
if (rcode < 0) {
if (errno == EINTR) continue;
fprintf(stderr, "%s: Failed selecting: %s\n",
progname, fr_syserror(errno));
return -1;
}
if (rcode == 0) {
fprintf(stderr, "%s: Server closed the connection.\n",
progname);
return -1;
}
#ifdef MSG_DONTWAIT
len = recv(sockfd, buffer + size,
bufsize - size - 1, MSG_DONTWAIT);
#else
/*
* Read one byte at a time (ugh)
*/
len = recv(sockfd, buffer + size, 1, 0);
#endif
if (len < 0) {
/*
* No data: keep looping
*/
if ((errno == EAGAIN) || (errno == EINTR)) {
continue;
}
fprintf(stderr, "%s: Error reading socket: %s\n",
progname, fr_syserror(errno));
return -1;
}
if (len == 0) return 0; /* clean exit */
size += len;
buffer[size] = '\0';
/*
* There really is a better way of doing this.
*/
p = strstr(buffer, "radmin> ");
if (p &&
((p == buffer) ||
(p[-1] == '\n') ||
(p[-1] == '\r'))) {
*p = '\0';
if (p[-1] == '\n') p[-1] = '\0';
break;
}
}
/*
* Blank prompt. Go get another command.
*/
if (!buffer[0]) return 1;
buffer[size] = '\0'; /* this is at least right */
return 2;
}
static int do_connect(int *out, char const *file, char const *server)
{
char buffer[65536];
ssize_t len, size;
int sockfd;
uint32_t magic, needed;
/*
* Close stale file descriptors
*/
if (*out != -1) {
close(*out);
*out = -1;
}
if (file) {
/*
* FIXME: Get destination from command line, if possible?
*/
sockfd = fr_domain_socket(file);
if (sockfd < 0) 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
/*
* Read initial magic && version information.
*/
for (size = 0; size < 8; size += len) {
len = read(sockfd, buffer + size, 8 - size);
if (len < 0) {
fprintf(stderr, "%s: Error reading initial data from socket: %s\n",
progname, fr_syserror(errno));
close(sockfd);
return -1;
}
}
memcpy(&magic, buffer, 4);
magic = ntohl(magic);
if (magic != 0xf7eead15) {
fprintf(stderr, "%s: Socket %s is not FreeRADIUS administration socket\n", progname, file);
close(sockfd);
return -1;
}
memcpy(&magic, buffer + 4, 4);
magic = ntohl(magic);
if (!server) {
needed = 1;
} else {
needed = 2;
}
if (magic != needed) {
fprintf(stderr, "%s: Socket version mismatch: Need %d, got %d\n",
progname, needed, magic);
close(sockfd);
return -1;
}
if (server && secret) do_challenge(sockfd);
*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 *output_file = NULL;
char const *server = NULL;
char const *radius_dir = RADIUS_DIR;
char const *dict_dir = DICTDIR;
char *commands[MAX_COMMANDS];
int num_commands = -1;
#ifndef NDEBUG
if (fr_fault_setup(getenv("PANIC_ACTION"), argv[0]) < 0) {
fr_perror("radmin");
exit(EXIT_FAILURE);
}
#endif
talloc_set_log_stderr();
outputfp = stdout; /* stdout is not a constant value... */
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:o:qs:S")) != 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':
if (strcmp(optarg, "-") != 0) {
input_file = optarg;
}
quiet = true;
break;
case 'n':
name = optarg;
break;
case 'o':
if (strcmp(optarg, "-") != 0) {
output_file = optarg;
}
quiet = true;
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;
}
}
/*
* 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;
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);
usage(1);
}
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\n", progname);
exit(1);
}
if (!file) {
fprintf(stderr, "%s: No path given for socket\n", progname);
usage(1);
}
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 (output_file) {
outputfp = fopen(output_file, "w");
if (!outputfp) {
fprintf(stderr, "%s: Failed creating %s: %s\n", progname, output_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();
#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 (buffer[0]) {
fputs(buffer, outputfp);
fprintf(outputfp, "\n");
fflush(outputfp);
}
}
exit(0);
}
if (!quiet) {
printf("%s - FreeRADIUS Server administration tool.\n", radmin_version);
printf("Copyright (C) 2008-2015 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) {
#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);
#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 (memcmp(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;
}
len = run_command(sockfd, line, buffer, sizeof(buffer));
if ((len < 0) && (do_connect(&sockfd, file, server) < 0)) {
fprintf(stderr, "Reconnecting...");
exit(1);
} else if (len == 0) break;
else if (len == 1) continue; /* no output. */
fputs(buffer, outputfp);
fflush(outputfp);
fprintf(outputfp, "\n");
}
fprintf(outputfp, "\n");
if (inputfp != stdin) fclose(inputfp);
if (outputfp != stdout) fclose(outputfp);
return 0;
}