mirror of
https://github.com/yarrick/iodine.git
synced 2024-12-22 13:23:32 +02:00
Misc cleanup of tun.c
- Make variables static - open_tun(): First Linux code, then Windows, then BSDs - write_tun()/read_tun(): Split Windows and normal code
This commit is contained in:
Erik Ekman
parent
3ebcd29b13
commit
bf658b0c59
1 changed files with 91 additions and 76 deletions
167
src/tun.c
167
src/tun.c
|
|
@ -33,8 +33,8 @@
|
|||
#include "windows.h"
|
||||
#include <winioctl.h>
|
||||
|
||||
HANDLE dev_handle;
|
||||
struct tun_data data;
|
||||
static HANDLE dev_handle;
|
||||
static struct tun_data data;
|
||||
|
||||
static void get_name(char *ifname, int namelen, char *dev_name);
|
||||
|
||||
|
|
@ -60,9 +60,8 @@ static void get_name(char *ifname, int namelen, char *dev_name);
|
|||
#include "tun.h"
|
||||
#include "common.h"
|
||||
|
||||
char if_name[250];
|
||||
static char if_name[250];
|
||||
|
||||
#ifndef WINDOWS32
|
||||
#ifdef LINUX
|
||||
|
||||
#include <sys/ioctl.h>
|
||||
|
|
@ -129,51 +128,8 @@ open_tun(const char *tun_device)
|
|||
return -1;
|
||||
}
|
||||
|
||||
#else /* BSD */
|
||||
#elif WINDOWS32
|
||||
|
||||
int
|
||||
open_tun(const char *tun_device)
|
||||
{
|
||||
int i;
|
||||
int tun_fd;
|
||||
char tun_name[50];
|
||||
|
||||
if (tun_device != NULL) {
|
||||
snprintf(tun_name, sizeof(tun_name), "/dev/%s", tun_device);
|
||||
strncpy(if_name, tun_device, sizeof(if_name));
|
||||
if_name[sizeof(if_name)-1] = '\0';
|
||||
|
||||
if ((tun_fd = open(tun_name, O_RDWR)) < 0) {
|
||||
warn("open_tun: %s: %s", tun_name, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
fprintf(stderr, "Opened %s\n", tun_name);
|
||||
fd_set_close_on_exec(tun_fd);
|
||||
return tun_fd;
|
||||
} else {
|
||||
for (i = 0; i < TUN_MAX_TRY; i++) {
|
||||
snprintf(tun_name, sizeof(tun_name), "/dev/tun%d", i);
|
||||
|
||||
if ((tun_fd = open(tun_name, O_RDWR)) >= 0) {
|
||||
fprintf(stderr, "Opened %s\n", tun_name);
|
||||
snprintf(if_name, sizeof(if_name), "tun%d", i);
|
||||
fd_set_close_on_exec(tun_fd);
|
||||
return tun_fd;
|
||||
}
|
||||
|
||||
if (errno == ENOENT)
|
||||
break;
|
||||
}
|
||||
|
||||
warn("open_tun: Failed to open tunneling device");
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
#endif /* !LINUX */
|
||||
#else /* WINDOWS32 */
|
||||
static void
|
||||
get_device(char *device, int device_len, const char *wanted_dev)
|
||||
{
|
||||
|
|
@ -356,6 +312,50 @@ open_tun(const char *tun_device)
|
|||
|
||||
return tunfd;
|
||||
}
|
||||
|
||||
#else /* BSD and friends */
|
||||
|
||||
int
|
||||
open_tun(const char *tun_device)
|
||||
{
|
||||
int i;
|
||||
int tun_fd;
|
||||
char tun_name[50];
|
||||
|
||||
if (tun_device != NULL) {
|
||||
snprintf(tun_name, sizeof(tun_name), "/dev/%s", tun_device);
|
||||
strncpy(if_name, tun_device, sizeof(if_name));
|
||||
if_name[sizeof(if_name)-1] = '\0';
|
||||
|
||||
if ((tun_fd = open(tun_name, O_RDWR)) < 0) {
|
||||
warn("open_tun: %s: %s", tun_name, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
fprintf(stderr, "Opened %s\n", tun_name);
|
||||
fd_set_close_on_exec(tun_fd);
|
||||
return tun_fd;
|
||||
} else {
|
||||
for (i = 0; i < TUN_MAX_TRY; i++) {
|
||||
snprintf(tun_name, sizeof(tun_name), "/dev/tun%d", i);
|
||||
|
||||
if ((tun_fd = open(tun_name, O_RDWR)) >= 0) {
|
||||
fprintf(stderr, "Opened %s\n", tun_name);
|
||||
snprintf(if_name, sizeof(if_name), "tun%d", i);
|
||||
fd_set_close_on_exec(tun_fd);
|
||||
return tun_fd;
|
||||
}
|
||||
|
||||
if (errno == ENOENT)
|
||||
break;
|
||||
}
|
||||
|
||||
warn("open_tun: Failed to open tunneling device");
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
void
|
||||
|
|
@ -365,10 +365,49 @@ close_tun(int tun_fd)
|
|||
close(tun_fd);
|
||||
}
|
||||
|
||||
#ifdef WINDOWS32
|
||||
int
|
||||
write_tun(int tun_fd, char *data, size_t len)
|
||||
{
|
||||
#if defined (FREEBSD) || defined (DARWIN) || defined(NETBSD) || defined(WINDOWS32)
|
||||
DWORD written;
|
||||
DWORD res;
|
||||
OVERLAPPED olpd;
|
||||
|
||||
data += 4;
|
||||
len -= 4;
|
||||
|
||||
olpd.Offset = 0;
|
||||
olpd.OffsetHigh = 0;
|
||||
olpd.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
|
||||
res = WriteFile(dev_handle, data, len, &written, &olpd);
|
||||
if (!res && GetLastError() == ERROR_IO_PENDING) {
|
||||
WaitForSingleObject(olpd.hEvent, INFINITE);
|
||||
res = GetOverlappedResult(dev_handle, &olpd, &written, FALSE);
|
||||
if (written != len) {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
ssize_t
|
||||
read_tun(int tun_fd, char *buf, size_t len)
|
||||
{
|
||||
int bytes;
|
||||
memset(buf, 0, 4);
|
||||
|
||||
bytes = recv(tun_fd, buf + 4, len - 4, 0);
|
||||
if (bytes < 0) {
|
||||
return bytes;
|
||||
} else {
|
||||
return bytes + 4;
|
||||
}
|
||||
}
|
||||
#else
|
||||
int
|
||||
write_tun(int tun_fd, char *data, size_t len)
|
||||
{
|
||||
#if defined (FREEBSD) || defined (DARWIN) || defined(NETBSD)
|
||||
data += 4;
|
||||
len -= 4;
|
||||
#else /* !FREEBSD/DARWIN */
|
||||
|
|
@ -385,47 +424,22 @@ write_tun(int tun_fd, char *data, size_t len)
|
|||
#endif /* !LINUX */
|
||||
#endif /* FREEBSD */
|
||||
|
||||
#ifndef WINDOWS32
|
||||
if (write(tun_fd, data, len) != len) {
|
||||
warn("write_tun");
|
||||
return 1;
|
||||
}
|
||||
#else /* WINDOWS32 */
|
||||
{
|
||||
DWORD written;
|
||||
DWORD res;
|
||||
OVERLAPPED olpd;
|
||||
|
||||
olpd.Offset = 0;
|
||||
olpd.OffsetHigh = 0;
|
||||
olpd.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
|
||||
res = WriteFile(dev_handle, data, len, &written, &olpd);
|
||||
if (!res && GetLastError() == ERROR_IO_PENDING) {
|
||||
WaitForSingleObject(olpd.hEvent, INFINITE);
|
||||
res = GetOverlappedResult(dev_handle, &olpd, &written, FALSE);
|
||||
if (written != len) {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
ssize_t
|
||||
read_tun(int tun_fd, char *buf, size_t len)
|
||||
{
|
||||
#if defined (FREEBSD) || defined (DARWIN) || defined(NETBSD) || defined(WINDOWS32)
|
||||
#if defined (FREEBSD) || defined (DARWIN) || defined(NETBSD)
|
||||
/* FreeBSD/Darwin/NetBSD has no header */
|
||||
int bytes;
|
||||
memset(buf, 0, 4);
|
||||
#ifdef WINDOWS32
|
||||
/* Windows needs recv() since it is local UDP socket */
|
||||
bytes = recv(tun_fd, buf + 4, len - 4, 0);
|
||||
#else
|
||||
/* The other need read() because fd is not a socket */
|
||||
|
||||
bytes = read(tun_fd, buf + 4, len - 4);
|
||||
#endif /*WINDOWS32*/
|
||||
if (bytes < 0) {
|
||||
return bytes;
|
||||
} else {
|
||||
|
|
@ -435,6 +449,7 @@ read_tun(int tun_fd, char *buf, size_t len)
|
|||
return read(tun_fd, buf, len);
|
||||
#endif /* !FREEBSD */
|
||||
}
|
||||
#endif
|
||||
|
||||
int
|
||||
tun_setip(const char *ip, const char *other_ip, int netbits)
|
||||
|
|
|
|||
Loading…
Reference in a new issue