/*
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include <stdio.h>
-#include <stddef.h>
-#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
-#include <sys/wait.h>
+#include <string.h>
+#include <linux/if_tun.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
#include <sys/socket.h>
-#include <sys/un.h>
+#include <sys/wait.h>
#include <sys/uio.h>
-#include <sys/ioctl.h>
-#include <net/if.h>
-#include <linux/if_tun.h>
-#include "net_user.h"
-#include "tuntap.h"
+#include "kern_constants.h"
#include "kern_util.h"
-#include "user_util.h"
-#include "user.h"
#include "os.h"
+#include "tuntap.h"
+#include "user.h"
-#define MAX_PACKET ETH_MAX_PACKET
-
-void tuntap_user_init(void *data, void *dev)
+static int tuntap_user_init(void *data, void *dev)
{
struct tuntap_data *pri = data;
pri->dev = dev;
+ return 0;
}
static void tuntap_add_addr(unsigned char *addr, unsigned char *netmask,
struct tuntap_data *pri = data;
tap_check_ips(pri->gate_addr, addr);
- if((pri->fd == -1) || pri->fixed_config) return;
+ if ((pri->fd == -1) || pri->fixed_config)
+ return;
open_addr(addr, netmask, pri->dev_name);
}
{
struct tuntap_data *pri = data;
- if((pri->fd == -1) || pri->fixed_config) return;
+ if ((pri->fd == -1) || pri->fixed_config)
+ return;
close_addr(addr, netmask, pri->dev_name);
}
static void tuntap_pre_exec(void *arg)
{
struct tuntap_pre_exec_data *data = arg;
-
+
dup2(data->stdout, 1);
- os_close_file(data->close_me);
+ close(data->close_me);
}
static int tuntap_open_tramp(char *gate, int *fd_out, int me, int remote,
data.stdout = remote;
data.close_me = me;
- pid = run_helper(tuntap_pre_exec, &data, argv, NULL);
+ pid = run_helper(tuntap_pre_exec, &data, argv);
- if(pid < 0) return(-pid);
+ if (pid < 0)
+ return -pid;
- os_close_file(remote);
+ close(remote);
msg.msg_name = NULL;
msg.msg_namelen = 0;
- if(buffer != NULL){
+ if (buffer != NULL) {
iov = ((struct iovec) { buffer, buffer_len });
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
n = recvmsg(me, &msg, 0);
*used_out = n;
- if(n < 0){
+ if (n < 0) {
err = -errno;
- printk("tuntap_open_tramp : recvmsg failed - errno = %d\n",
- errno);
+ printk(UM_KERN_ERR "tuntap_open_tramp : recvmsg failed - "
+ "errno = %d\n", errno);
return err;
}
- CATCH_EINTR(waitpid(pid, NULL, 0));
+ helper_wait(pid);
cmsg = CMSG_FIRSTHDR(&msg);
- if(cmsg == NULL){
- printk("tuntap_open_tramp : didn't receive a message\n");
- return(-EINVAL);
+ if (cmsg == NULL) {
+ printk(UM_KERN_ERR "tuntap_open_tramp : didn't receive a "
+ "message\n");
+ return -EINVAL;
}
- if((cmsg->cmsg_level != SOL_SOCKET) ||
- (cmsg->cmsg_type != SCM_RIGHTS)){
- printk("tuntap_open_tramp : didn't receive a descriptor\n");
- return(-EINVAL);
+ if ((cmsg->cmsg_level != SOL_SOCKET) ||
+ (cmsg->cmsg_type != SCM_RIGHTS)) {
+ printk(UM_KERN_ERR "tuntap_open_tramp : didn't receive a "
+ "descriptor\n");
+ return -EINVAL;
}
*fd_out = ((int *) CMSG_DATA(cmsg))[0];
- os_set_exec_close(*fd_out, 1);
- return(0);
+ os_set_exec_close(*fd_out);
+ return 0;
}
static int tuntap_open(void *data)
int err, fds[2], len, used;
err = tap_open_common(pri->dev, pri->gate_addr);
- if(err < 0)
- return(err);
+ if (err < 0)
+ return err;
- if(pri->fixed_config){
+ if (pri->fixed_config) {
pri->fd = os_open_file("/dev/net/tun",
of_cloexec(of_rdwr(OPENFLAGS())), 0);
- if(pri->fd < 0){
- printk("Failed to open /dev/net/tun, err = %d\n",
- -pri->fd);
- return(pri->fd);
+ if (pri->fd < 0) {
+ printk(UM_KERN_ERR "Failed to open /dev/net/tun, "
+ "err = %d\n", -pri->fd);
+ return pri->fd;
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
strlcpy(ifr.ifr_name, pri->dev_name, sizeof(ifr.ifr_name));
- if(ioctl(pri->fd, TUNSETIFF, (void *) &ifr) < 0){
+ if (ioctl(pri->fd, TUNSETIFF, &ifr) < 0) {
err = -errno;
- printk("TUNSETIFF failed, errno = %d\n", errno);
- os_close_file(pri->fd);
+ printk(UM_KERN_ERR "TUNSETIFF failed, errno = %d\n",
+ errno);
+ close(pri->fd);
return err;
}
}
else {
- err = os_pipe(fds, 0, 0);
- if(err < 0){
- printk("tuntap_open : os_pipe failed - err = %d\n",
- -err);
- return(err);
+ err = socketpair(AF_UNIX, SOCK_DGRAM, 0, fds);
+ if (err) {
+ err = -errno;
+ printk(UM_KERN_ERR "tuntap_open : socketpair failed - "
+ "errno = %d\n", errno);
+ return err;
}
buffer = get_output_buffer(&len);
- if(buffer != NULL) len--;
+ if (buffer != NULL)
+ len--;
used = 0;
err = tuntap_open_tramp(pri->gate_addr, &pri->fd, fds[0],
fds[1], buffer, len, &used);
output = buffer;
- if(err < 0) {
+ if (err < 0) {
printk("%s", output);
free_output_buffer(buffer);
- printk("tuntap_open_tramp failed - err = %d\n", -err);
- return(err);
+ printk(UM_KERN_ERR "tuntap_open_tramp failed - "
+ "err = %d\n", -err);
+ return err;
}
pri->dev_name = uml_strdup(buffer);
printk("%s", output);
free_output_buffer(buffer);
- os_close_file(fds[0]);
+ close(fds[0]);
iter_addresses(pri->dev, open_addr, pri->dev_name);
}
- return(pri->fd);
+ return pri->fd;
}
static void tuntap_close(int fd, void *data)
{
struct tuntap_data *pri = data;
- if(!pri->fixed_config)
+ if (!pri->fixed_config)
iter_addresses(pri->dev, close_addr, pri->dev_name);
- os_close_file(fd);
+ close(fd);
pri->fd = -1;
}
-static int tuntap_set_mtu(int mtu, void *data)
-{
- return(mtu);
-}
-
const struct net_user_info tuntap_user_info = {
.init = tuntap_user_init,
.open = tuntap_open,
.close = tuntap_close,
.remove = NULL,
- .set_mtu = tuntap_set_mtu,
.add_address = tuntap_add_addr,
.delete_address = tuntap_del_addr,
- .max_packet = MAX_PACKET
+ .mtu = ETH_MAX_PACKET,
+ .max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
};
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff