Use thread for tun device.

diff --git a/src/linux/device.c b/src/linux/device.c
index 0cfc546..c1ca0a2 100644 (file)
--- a/src/linux/device.c
+++ b/src/linux/device.c
@@ -28,9 +28,11 @@
 #endif
 
 #include "conf.h"
+#include "device.h"
 #include "logger.h"
 #include "net.h"
 #include "route.h"
+#include "threads.h"
 #include "utils.h"
 #include "xalloc.h"
 
@@ -41,6 +43,7 @@ typedef enum device_type_t {
 } device_type_t;
 
 int device_fd = -1;
+int fd = -1;
 static device_type_t device_type;
 char *device = NULL;
 char *iface = NULL;
@@ -50,6 +53,26 @@ static char *device_info;
 static uint64_t device_total_in = 0;
 static uint64_t device_total_out = 0;
 
+thread_t thread;
+
+static void read_thread(void *arg) {
+       static vpn_packet_t packet;
+       errno = 0;
+
+       while(true) {
+               if(read_packet(&packet)) {
+                       route(myself, &packet);
+               } else {
+                       if(errno == EAGAIN || errno == EINTR) {
+                               errno = 0;
+                               continue;
+                       }
+
+                       return;
+               }
+       }       
+}
+
 bool setup_device(void) {
        struct ifreq ifr;
        bool t1q = false;
@@ -64,9 +87,9 @@ bool setup_device(void) {
 #else
                iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device);
 #endif
-       device_fd = open(device, O_RDWR | O_NONBLOCK);
+       fd = open(device, O_RDWR);
 
-       if(device_fd < 0) {
+       if(fd < 0) {
                logger(LOG_ERR, "Could not open %s: %s", device, strerror(errno));
                return false;
        }
@@ -94,11 +117,11 @@ bool setup_device(void) {
        if(iface)
                strncpy(ifr.ifr_name, iface, IFNAMSIZ);
 
-       if(!ioctl(device_fd, TUNSETIFF, &ifr)) {
+       if(!ioctl(fd, TUNSETIFF, &ifr)) {
                strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
                if(iface) free(iface);
                iface = xstrdup(ifrname);
-       } else if(!ioctl(device_fd, (('T' << 8) | 202), &ifr)) {
+       } else if(!ioctl(fd, (('T' << 8) | 202), &ifr)) {
                logger(LOG_WARNING, "Old ioctl() request was needed for %s", device);
                strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
                if(iface) free(iface);
@@ -117,11 +140,12 @@ bool setup_device(void) {
 
        logger(LOG_INFO, "%s is a %s", device, device_info);
 
-       return true;
+       return thread_create(&thread, read_thread, NULL);
 }
 
 void close_device(void) {
-       close(device_fd);
+       close(fd);
+       thread_destroy(&thread);
 
        free(device);
        free(iface);
@@ -132,7 +156,7 @@ bool read_packet(vpn_packet_t *packet) {
        
        switch(device_type) {
                case DEVICE_TYPE_TUN:
-                       inlen = read(device_fd, packet->data + 10, MTU - 10);
+                       inlen = read(fd, packet->data + 10, MTU - 10);
 
                        if(inlen <= 0) {
                                logger(LOG_ERR, "Error while reading from %s %s: %s",
@@ -143,7 +167,7 @@ bool read_packet(vpn_packet_t *packet) {
                        packet->len = inlen + 10;
                        break;
                case DEVICE_TYPE_TAP:
-                       inlen = read(device_fd, packet->data, MTU);
+                       inlen = read(fd, packet->data, MTU);
 
                        if(inlen <= 0) {
                                logger(LOG_ERR, "Error while reading from %s %s: %s",
@@ -154,7 +178,7 @@ bool read_packet(vpn_packet_t *packet) {
                        packet->len = inlen;
                        break;
                case DEVICE_TYPE_ETHERTAP:
-                       inlen = read(device_fd, packet->data - 2, MTU + 2);
+                       inlen = read(fd, packet->data - 2, MTU + 2);
 
                        if(inlen <= 0) {
                                logger(LOG_ERR, "Error while reading from %s %s: %s",
@@ -181,14 +205,14 @@ bool write_packet(vpn_packet_t *packet) {
        switch(device_type) {
                case DEVICE_TYPE_TUN:
                        packet->data[10] = packet->data[11] = 0;
-                       if(write(device_fd, packet->data + 10, packet->len - 10) < 0) {
+                       if(write(fd, packet->data + 10, packet->len - 10) < 0) {
                                logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
                                           strerror(errno));
                                return false;
                        }
                        break;
                case DEVICE_TYPE_TAP:
-                       if(write(device_fd, packet->data, packet->len) < 0) {
+                       if(write(fd, packet->data, packet->len) < 0) {
                                logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
                                           strerror(errno));
                                return false;
@@ -197,7 +221,7 @@ bool write_packet(vpn_packet_t *packet) {
                case DEVICE_TYPE_ETHERTAP:
                        *(short int *)(packet->data - 2) = packet->len;
 
-                       if(write(device_fd, packet->data - 2, packet->len + 2) < 0) {
+                       if(write(fd, packet->data - 2, packet->len + 2) < 0) {
                                logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
                                           strerror(errno));
                                return false;