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add some ugly code

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tTh 2022-09-12 01:18:07 +02:00
parent 3794eb2608
commit 9e882d49cb
1 changed files with 100 additions and 0 deletions
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code/hardware/if_eth.c Normal file
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/*
* code extrait des bas-fonds de l'internet obscur !
*
* DON'T TRUST IT !
*
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <net/if.h>
/* ------------------------------------------------------------- */
int get_if_flags(char *ifname, short *p_flags)
{
int fd;
int retcode;
struct ifreq req;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s \"%s\" to %p\n", __func__, ifname, p_flags);
#endif
/* Sanity check */
if ( strlen(ifname) > (IFNAMSIZ-1) )
{
fprintf(stderr, "name %s to long\n", ifname);
abort();
}
fd = socket(PF_INET, SOCK_DGRAM, 0);
if (fd < 0)
{
perror("socket bla...");
return -2;
}
#if DEBUG_LEVEL
fprintf(stderr, "fd socket bla... = %d\n", fd);
#endif
/* populate the struct for the request */
memset(&req, 0, sizeof(req));
strcpy(req.ifr_name, ifname);
/* do the call */
retcode = ioctl(fd, SIOCGIFFLAGS, &req);
if (retcode < 0)
{
perror("ioctl SIOCGIFFLAGS");
close(fd);
return -1;
}
#if DEBUG_LEVEL
fprintf(stderr, "ioctl -> %d\n", retcode);
#endif
#if DEBUG_LEVEL
/* display the result */
fprintf(stderr, "flags = 0x%04x\n", req.ifr_flags);
#endif
close(fd);
*p_flags = req.ifr_flags;
return 0;
}
/* ------------------------------------------------------------- */
int get_if_up_or_down(char *ifname)
{
int foo;
short flags;
foo = get_if_flags(ifname, &flags);
#if DEBUG_LEVEL
fprintf(stderr, "get flags -> %d\n", foo);
#endif
if (foo < 0) /* got an error ? */
return -1;
return (flags & IFF_UP) ? 1 : 0;
}
/* ------------------------------------------------------------- */
int get_if_running(char *ifname)
{
int foo;
short flags;
foo = get_if_flags(ifname, &flags);
#if DEBUG_LEVEL
fprintf(stderr, "get flags -> %d\n", foo);
#endif
if (foo < 0) /* got an error ? */
return -1;
return (flags & IFF_RUNNING) ? 1 : 0;
}
/* ------------------------------------------------------------- */