/*
device.c -- UML network socket
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2011 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2012 Guus Sliepen <guus@tinc-vpn.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
static int data_fd = -1;
static int write_fd = -1;
static int state = 0;
-static char *device_info;
+static const char *device_info = "UML network socket";
extern char *identname;
extern volatile bool running;
enum request_type { REQ_NEW_CONTROL };
static struct request {
- uint32_t magic;
- uint32_t version;
- enum request_type type;
- struct sockaddr_un sock;
+ uint32_t magic;
+ uint32_t version;
+ enum request_type type;
+ struct sockaddr_un sock;
} request;
static struct sockaddr_un data_sun;
} name;
struct timeval tv;
- if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- xasprintf(&device, LOCALSTATEDIR "/run/%s.umlsocket", identname);
+ if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
+ xasprintf(&device, RUNSTATEDIR "/%s.umlsocket", identname);
+ }
get_config_string(lookup_config(config_tree, "Interface"), &iface);
- device_info = "UML network socket";
-
if((write_fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) {
logger(LOG_ERR, "Could not open write %s: %s", device_info, strerror(errno));
running = false;
return false;
}
- setsockopt(write_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
+#ifdef FD_CLOEXEC
+ fcntl(write_fd, F_SETFD, FD_CLOEXEC);
+#endif
+
+ setsockopt(write_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
if(fcntl(write_fd, F_SETFL, O_NONBLOCK) < 0) {
logger(LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno));
return false;
}
- setsockopt(data_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
+#ifdef FD_CLOEXEC
+ fcntl(data_fd, F_SETFD, FD_CLOEXEC);
+#endif
+
+ setsockopt(data_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
if(fcntl(data_fd, F_SETFL, O_NONBLOCK) < 0) {
logger(LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno));
gettimeofday(&tv, NULL);
name.usecs = tv.tv_usec;
data_sun.sun_family = AF_UNIX;
- memcpy(&data_sun.sun_path, &name, sizeof name);
-
- if(bind(data_fd, (struct sockaddr *)&data_sun, sizeof data_sun) < 0) {
+ memcpy(&data_sun.sun_path, &name, sizeof(name));
+
+ if(bind(data_fd, (struct sockaddr *)&data_sun, sizeof(data_sun)) < 0) {
logger(LOG_ERR, "Could not bind data %s: %s", device_info, strerror(errno));
running = false;
return false;
if((listen_fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
logger(LOG_ERR, "Could not open %s: %s", device_info,
- strerror(errno));
+ strerror(errno));
return false;
}
- setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
+#ifdef FD_CLOEXEC
+ fcntl(device_fd, F_SETFD, FD_CLOEXEC);
+#endif
+
+ setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) {
logger(LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno));
}
listen_sun.sun_family = AF_UNIX;
- strncpy(listen_sun.sun_path, device, sizeof listen_sun.sun_path);
- if(bind(listen_fd, (struct sockaddr *)&listen_sun, sizeof listen_sun) < 0) {
+ strncpy(listen_sun.sun_path, device, sizeof(listen_sun.sun_path));
+
+ if(bind(listen_fd, (struct sockaddr *)&listen_sun, sizeof(listen_sun)) < 0) {
logger(LOG_ERR, "Could not bind %s to %s: %s", device_info, device, strerror(errno));
return false;
}
logger(LOG_INFO, "%s is a %s", device, device_info);
- if(routing_mode == RMODE_ROUTER)
+ if(routing_mode == RMODE_ROUTER) {
overwrite_mac = true;
+ }
return true;
}
void close_device(void) {
- if(listen_fd >= 0)
+ if(listen_fd >= 0) {
close(listen_fd);
+ }
- if(request_fd >= 0)
+ if(request_fd >= 0) {
close(request_fd);
+ }
- if(data_fd >= 0)
+ if(data_fd >= 0) {
close(data_fd);
+ }
- if(write_fd >= 0)
+ if(write_fd >= 0) {
close(write_fd);
+ }
unlink(device);
free(device);
- if(iface) free(iface);
+
+ if(iface) {
+ free(iface);
+ }
}
static bool read_packet(vpn_packet_t *packet) {
int lenin;
switch(state) {
- case 0: {
- struct sockaddr sa;
- socklen_t salen = sizeof sa;
-
- request_fd = accept(listen_fd, &sa, &salen);
- if(request_fd < 0) {
- logger(LOG_ERR, "Could not accept connection to %s %s: %s", device_info, device, strerror(errno));
- return false;
- }
-
- if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) {
- logger(LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno));
- running = false;
- return false;
- }
-
- close(listen_fd);
- listen_fd = -1;
- device_fd = request_fd;
- state = 1;
+ case 0: {
+ struct sockaddr sa;
+ socklen_t salen = sizeof(sa);
+
+ request_fd = accept(listen_fd, &sa, &salen);
+
+ if(request_fd < 0) {
+ logger(LOG_ERR, "Could not accept connection to %s %s: %s", device_info, device, strerror(errno));
+ return false;
+ }
+
+#ifdef FD_CLOEXEC
+ fcntl(request_fd, F_SETFD, FD_CLOEXEC);
+#endif
+
+ if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) {
+ logger(LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno));
+ running = false;
+ return false;
+ }
+
+ close(listen_fd);
+ listen_fd = -1;
+ device_fd = request_fd;
+ state = 1;
+ return false;
+ }
+
+ case 1: {
+ if((lenin = read(request_fd, &request, sizeof(request))) != sizeof request) {
+ logger(LOG_ERR, "Error while reading request from %s %s: %s", device_info,
+ device, strerror(errno));
+ running = false;
return false;
}
- case 1: {
- if((lenin = read(request_fd, &request, sizeof request)) != sizeof request) {
- logger(LOG_ERR, "Error while reading request from %s %s: %s", device_info,
- device, strerror(errno));
- running = false;
- return false;
- }
-
- if(request.magic != 0xfeedface || request.version != 3 || request.type != REQ_NEW_CONTROL) {
- logger(LOG_ERR, "Unknown magic %x, version %d, request type %d from %s %s",
- request.magic, request.version, request.type, device_info, device);
- running = false;
- return false;
- }
-
- if(connect(write_fd, &request.sock, sizeof request.sock) < 0) {
- logger(LOG_ERR, "Could not bind write %s: %s", device_info, strerror(errno));
- running = false;
- return false;
- }
-
- write(request_fd, &data_sun, sizeof data_sun);
- device_fd = data_fd;
-
- logger(LOG_INFO, "Connection with UML established");
-
- state = 2;
+ if(request.magic != 0xfeedface || request.version != 3 || request.type != REQ_NEW_CONTROL) {
+ logger(LOG_ERR, "Unknown magic %x, version %d, request type %d from %s %s",
+ request.magic, request.version, request.type, device_info, device);
+ running = false;
return false;
}
- case 2: {
- if((lenin = read(data_fd, packet->data, MTU)) <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
- running = false;
- return false;
- }
+ if(connect(write_fd, (struct sockaddr *)&request.sock, sizeof(request.sock)) < 0) {
+ logger(LOG_ERR, "Could not bind write %s: %s", device_info, strerror(errno));
+ running = false;
+ return false;
+ }
- packet->len = lenin;
+ write(request_fd, &data_sun, sizeof(data_sun));
+ device_fd = data_fd;
- device_total_in += packet->len;
+ logger(LOG_INFO, "Connection with UML established");
- ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
- device_info);
+ state = 2;
+ return false;
+ }
- return true;
+ case 2: {
+ if((lenin = read(data_fd, packet->data, MTU)) <= 0) {
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ device, strerror(errno));
+ running = false;
+ return false;
}
- default:
- logger(LOG_ERR, "Invalid value for state variable in " __FILE__);
- abort();
+ packet->len = lenin;
+
+ device_total_in += packet->len;
+
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
+ device_info);
+
+ return true;
+ }
+
+ default:
+ logger(LOG_ERR, "Invalid value for state variable in " __FILE__);
+ abort();
}
}
static bool write_packet(vpn_packet_t *packet) {
if(state != 2) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Dropping packet of %d bytes to %s: not connected to UML yet",
- packet->len, device_info);
+ packet->len, device_info);
return false;
}
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
- packet->len, device_info);
+ packet->len, device_info);
if(write(write_fd, packet->data, packet->len) < 0) {
if(errno != EINTR && errno != EAGAIN) {
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