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Removed libtun.c

This commit is contained in:
Tristan B. Velloza Kildaire 2021-12-29 11:18:54 +02:00
parent dd1022e9c3
commit 98e56dbed9
1 changed files with 21 additions and 22 deletions
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43
libtun.c
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@ -1,10 +1,18 @@
/**
* I have borrowed this code from the `libtun`
* project of mine whicn you can view in the
* link below
*
* https://github.com/deavmi/libtun
*/
* This module is used just to interface between the Linux
* kernel (via GLIBC) such that the tun adpater can be setup
* and destroyed
*
* `int createTun(char* interfaceName)`
* - This creates a tun interface with the provided name
* - and returns the fd
* `int destroyTun(int fd)`
* - This destroys the tun interface given
*
* Once we have the fd everything else can be done in D
* as we just read()/write() on the returned fd we got
* using `createTun`
*/
#include<linux/if.h>
#include<linux/if_tun.h>
@ -12,19 +20,11 @@
#include<string.h>
#include<sys/ioctl.h>
#include<unistd.h>
#include<stdint.h>
/* TODO: Update types here using stdint */
uint32_t createTun(char* interfaceName, int32_t iffFlags)
int createTun(char* interfaceName, int iffFlags)
{
/* TODO: Add all required error checking */
int32_t tunFD = open("/dev/net/tun", O_RDWR);
/* If error */
if(tunFD < 0)
{
return tunFD;
}
int tunFD = open("/dev/net/tun", O_RDWR);
/* TUN properties */
struct ifreq interfaceReqData;
@ -38,22 +38,22 @@ uint32_t createTun(char* interfaceName, int32_t iffFlags)
strcpy(interfaceReqData.ifr_name, interfaceName);
/* Attempt to bring up the tun device node */
int32_t tunStatus = ioctl(tunFD, TUNSETIFF, &interfaceReqData);
int tunStatus = ioctl(tunFD, TUNSETIFF, &interfaceReqData);
if(tunStatus < 0)
{
tunFD = tunStatus;
tunFD = tunStatus;
}
return tunFD;
}
uint32_t destroyTun(uint32_t fd)
int destroyTun(int fd)
{
return close(fd);
}
uint32_t tunWrite(uint32_t fd, char* data, int length)
int tunWrite(int fd, char* data, int length)
{
write(fd, data, length);
}
@ -64,8 +64,7 @@ uint32_t tunWrite(uint32_t fd, char* data, int length)
*
* (FIXME: For now we just read 20 bytes)
*/
uint32_t tunRead(uint32_t fd, char* data, int amount)
int tunRead(int fd, char* data, int amount)
{
return read(fd, data, amount);
}