#include "system.h"
#include "conf.h"
#include "control.h"
+#include "control_common.h"
#include "logger.h"
#include "xalloc.h"
extern char *controlsocketname;
static void handle_control_data(struct bufferevent *event, void *data) {
- char *line = evbuffer_readline(event->input);
- if(!line)
+ tinc_ctl_request_t req;
+ size_t size;
+ tinc_ctl_request_t res;
+ struct evbuffer *res_data = NULL;
+
+ if(EVBUFFER_LENGTH(event->input) < sizeof(tinc_ctl_request_t))
return;
-
- if(!strcasecmp(line, "stop")) {
+
+ /* Copy the structure to ensure alignment */
+ memcpy(&req, EVBUFFER_DATA(event->input), sizeof(tinc_ctl_request_t));
+
+ if(EVBUFFER_LENGTH(event->input) < req.length)
+ return;
+
+ if(req.length < sizeof(tinc_ctl_request_t))
+ goto failure;
+
+ memset(&res, 0, sizeof res);
+ res.type = req.type;
+ res.id = req.id;
+
+ res_data = evbuffer_new();
+ if (res_data == NULL) {
+ res.res_errno = ENOMEM;
+ goto respond;
+ }
+
+ if(req.type == REQ_STOP) {
logger(LOG_NOTICE, _("Got stop command"));
event_loopexit(NULL);
- return;
+ goto respond;
}
logger(LOG_DEBUG, _("Malformed control command received"));
+ res.res_errno = EINVAL;
+
+respond:
+ res.length = (sizeof res)
+ + ((res_data == NULL) ? 0 : EVBUFFER_LENGTH(res_data));
+ evbuffer_drain(event->input, req.length);
+ if(bufferevent_write(event, &res, sizeof res) == -1)
+ goto failure;
+ if(res_data != NULL) {
+ if(bufferevent_write_buffer(event, res_data) == -1)
+ goto failure;
+ evbuffer_free(res_data);
+ }
+ return;
+
+failure:
+ logger(LOG_INFO, _("Closing control socket on error"));
+ evbuffer_free(res_data);
close(event->ev_read.ev_fd);
splay_delete(control_socket_tree, event);
}
static void handle_new_control_socket(int fd, short events, void *data) {
int newfd;
struct bufferevent *ev;
+ tinc_ctl_greeting_t greeting;
newfd = accept(fd, NULL, NULL);
return;
}
+ memset(&greeting, 0, sizeof greeting);
+ greeting.version = TINC_CTL_VERSION_CURRENT;
+ if(bufferevent_write(ev, &greeting, sizeof greeting) == -1) {
+ logger(LOG_ERR,
+ _("Cannot send greeting for new control connection: %s"),
+ strerror(errno));
+ bufferevent_free(ev);
+ close(newfd);
+ return;
+ }
+
bufferevent_enable(ev, EV_READ);
splay_insert(control_socket_tree, ev);
--- /dev/null
+/*
+ control_protocol.h -- control socket protocol.
+ Copyright (C) 2007 Scott Lamb <slamb@slamb.org>
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id$
+*/
+
+#ifndef __TINC_CONTROL_PROTOCOL_H__
+#define __TINC_CONTROL_PROTOCOL_H__
+
+enum request_type {
+ REQ_STOP,
+ REQ_RELOAD,
+ REQ_RESTART,
+};
+
+#define TINC_CTL_VERSION_CURRENT 0
+
+/* This greeting is sent by the server on socket open. */
+typedef struct tinc_ctl_greeting_t {
+ int version;
+} tinc_ctl_greeting_t;
+
+/* A single request or response header. */
+typedef struct tinc_ctl_request_t {
+ size_t length; /* total length, including the header */
+ enum request_type type;
+ int id;
+ int res_errno; /* used only for responses */
+} tinc_ctl_request_t;
+
+#endif
#include <getopt.h>
-#include "protocol.h"
#include "xalloc.h"
+#include "protocol.h"
+#include "control_common.h"
/* The name this program was run with. */
char *program_name = NULL;
}
}
+static int fullread(int fd, void *data, size_t datalen) {
+ int rv, len = 0;
+
+ while (len < datalen) {
+ rv = read(fd, data + len, datalen - len);
+ if(rv == -1 && errno == EINTR)
+ continue;
+ else if (rv == -1)
+ return rv;
+ else if (rv == 0) {
+ errno = ENODATA;
+ return -1;
+ }
+ len += rv;
+ }
+ return 0;
+}
+
+/*
+ Send a request (raw)
+*/
+static int send_ctl_request(int fd, enum request_type type,
+ void const *outdata, size_t outdatalen,
+ int *res_errno_p, void **indata_p,
+ size_t *indatalen_p) {
+ tinc_ctl_request_t req;
+ int rv;
+ struct iovec vector[2] = {
+ {&req, sizeof(req)},
+ {(void*) outdata, outdatalen}
+ };
+ void *indata;
+
+ if(res_errno_p == NULL)
+ return -1;
+
+ memset(&req, 0, sizeof req);
+ req.length = sizeof req + outdatalen;
+ req.type = type;
+ req.res_errno = 0;
+
+ while((rv = writev(fd, vector, 2)) == -1 && errno == EINTR) ;
+ if(rv != req.length)
+ return -1;
+
+ if(fullread(fd, &req, sizeof req) == -1)
+ return -1;
+
+ if(req.length < sizeof req) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if(req.length > sizeof req) {
+ if (indata_p == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ indata = xmalloc(req.length - sizeof req);
+
+ if(fullread(fd, indata, req.length - sizeof req) == -1) {
+ free(indata);
+ return -1;
+ }
+
+ *indata_p = indata;
+ if(indatalen_p != NULL)
+ *indatalen_p = req.length - sizeof req;
+ }
+
+ *res_errno_p = req.res_errno;
+
+ return 0;
+}
+
+/*
+ Send a request (with printfs)
+*/
+static int send_ctl_request_cooked(int fd, enum request_type type,
+ void const *outdata, size_t outdatalen)
+{
+ int res_errno = -1;
+ char *buf = NULL;
+ size_t buflen = 0;
+
+ if(send_ctl_request(fd, type, outdata, outdatalen, &res_errno,
+ (void**) &buf, &buflen)) {
+ fprintf(stderr, _("Error sending request: %s\n"), strerror(errno));
+ return -1;
+ }
+
+ if(buf != NULL) {
+ printf("%*s", buflen, buf);
+ free(buf);
+ }
+
+ if(res_errno != 0) {
+ fprintf(stderr, _("Server reported error: %s\n"), strerror(res_errno));
+ return -1;
+ }
+
+ return 0;
+}
+
int main(int argc, char *argv[], char *envp[]) {
- int fd;
struct sockaddr_un addr;
+ int fd;
+ int len;
+ tinc_ctl_greeting_t greeting;
+ tinc_ctl_request_t req;
+
program_name = argv[0];
setlocale(LC_ALL, "");
return 1;
}
+ if(fullread(fd, &greeting, sizeof greeting) == -1) {
+ fprintf(stderr, _("Cannot read greeting from control socket: %s\n"),
+ strerror(errno));
+ return 1;
+ }
+
+ if(greeting.version != TINC_CTL_VERSION_CURRENT) {
+ fprintf(stderr, _("Version mismatch: server %d, client %d\n"),
+ greeting.version, TINC_CTL_VERSION_CURRENT);
+ return 1;
+ }
+
struct ucred cred;
socklen_t credlen = sizeof cred;
}
if(!strcasecmp(argv[optind], "stop")) {
- write(fd, "stop\n", 5);
- return 0;
+ return send_ctl_request_cooked(fd, REQ_STOP, NULL, 0) != -1;
}
if(!strcasecmp(argv[optind], "reload")) {
- write(fd, "reload\n", 7);
- return 0;
+ return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
}
if(!strcasecmp(argv[optind], "restart")) {
- write(fd, "restart\n", 8);
- return 0;
+ return send_ctl_request_cooked(fd, REQ_RESTART, NULL, 0) != -1;
}
fprintf(stderr, _("Unknown command `%s'.\n"), argv[optind]);
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