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mod_erlang_event: Support for reading erlang cookie from a file 

mod_erlang_event will now try to read $HOME/.erlang.cookie if no cookie
is specified in the config file. You can specify an arbitary cookie file
via the 'cookie-file' parameter in the config file. The cookie file MUST
be readable by the user freeswitch is running as (either the owner or
root) and the file MUST NOT be readable/writeable/executable by any
other user (eg 0400 permissions). Thanks to James Aimonetti for the idea
and the original patch.
This commit is contained in:
Andrew Thompson 2010-10-15 23:27:24 -04:00
parent f6f1230259
commit 094ffe37cc
1 changed files with 66 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
src/mod/event_handlers/mod_erlang_event/mod_erlang_event.c
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@ -1015,6 +1015,53 @@ static void launch_listener_thread(listener_t *listener)
}
static int read_cookie_from_file(char *filename) {
int fd;
char cookie[MAXATOMLEN+1];
char *end;
struct stat buf;
ssize_t res;
if (!stat(filename, &buf)) {
if ((buf.st_mode & S_IRWXG) || (buf.st_mode & S_IRWXO)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "%s must only be accessible by owner only.\n", filename);
return 2;
}
if (buf.st_size > MAXATOMLEN) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "%s contains a cookie larger than the maximum atom size of %d.\n", filename, MAXATOMLEN);
return 2;
}
fd = open(filename, O_RDONLY);
if (fd < 1) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Unable to open cookie file %s : %d.\n", filename, errno);
return 2;
}
if ((res = read(fd, cookie, MAXATOMLEN)) < 1) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Unable to read cookie file %s : %d.\n", filename, errno);
}
cookie[MAXATOMLEN+1] = '\0';
/* replace any end of line characters with a null */
if ((end = strchr(cookie, '\n'))) {
*end = '\0';
}
if ((end = strchr(cookie, '\r'))) {
*end = '\0';
}
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Read %d bytes from cookie file %s.\n", (int)res, filename);
set_pref_cookie(cookie);
return 0;
} else {
/* don't error here, because we might be blindly trying to read $HOME/.erlang.cookie, and that can fail silently */
return 1;
}
}
static int config(void)
{
@ -1041,6 +1088,10 @@ static int config(void)
prefs.port = (uint16_t) atoi(val);
} else if (!strcmp(var, "cookie")) {
set_pref_cookie(val);
} else if (!strcmp(var, "cookie-file")) {
if (read_cookie_from_file(val) == 1) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Unable to read cookie from %s\n", val);
}
} else if (!strcmp(var, "nodename")) {
set_pref_nodename(val);
} else if (!strcmp(var, "compat-rel")) {
@ -1075,7 +1126,21 @@ static int config(void)
}
if (zstr(prefs.cookie)) {
set_pref_cookie("ClueCon");
int res;
char* home_dir = getenv("HOME");
char path_buf[1024];
if (!zstr(home_dir)) {
/* $HOME/.erlang.cookie */
switch_snprintf(path_buf, sizeof(path_buf), "%s%s%s", home_dir, SWITCH_PATH_SEPARATOR, ".erlang.cookie");
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Checking for cookie at path: %s\n", path_buf);
res = read_cookie_from_file(path_buf);
if (res) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No cookie or valid cookie file specified, using default cookie\n");
set_pref_cookie("ClueCon");
}
}
}
if (!prefs.port) {