Re: linux subagent - Net.InterfaceList

...before adding to the agent's source tree.

Alex Kirhenshtein wrote:
> Hello.
>
> As were discovered earlier, function if_nameindex() do not show aliases,
> so now i use alternative way. test application attached, and it would be
> nice to get a responce from users with different kernels before adding.
>
> build: gcc iflist.c -o iflist -Wall
>
> tested on:
> Linux kenny 2.6.9-gentoo-r6 #1 Wed Nov 24 22:11:27 EEST 2005
> Linux cartman 2.6.12-gentoo-r1 #3 SMP Mon Jun 27 23:56:19 EEST 2005
>
> wbr, alex.
>
>
>
> ------------------------------------------------------------------------
>
> /* $Id$ */
>
> // vim: ts=3 sw=3
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <net/if.h>
> #include <sys/ioctl.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
> #include <string.h>
>
> #ifdef USE_NAMETOINDEX
> // if_nameindex()
> int main(void)
> {
> struct if_nameindex *pIndex;
> int i;
>
> pIndex = if_nameindex();
> if (pIndex != NULL)
> {
> for (i = 0; pIndex[i].if_index != 0 && pIndex[i].if_name != NULL; i++)
> {
> printf("[%2d] %-8s\n",
> pIndex[i].if_index,
> pIndex[i].if_name);
> }
> if_freenameindex(pIndex);
> }
>
> return 0;
> }
>
> #else
>
> // SIOCGIFCONF
> int main(void)
> {
> int s;
> char *buff;
> struct ifconf ifc;
> int i;
>
> s = socket(PF_INET, SOCK_DGRAM, 0);
> if (s > 0)
> {
> ifc.ifc_len = 0;
> ifc.ifc_buf = NULL;
> if (ioctl(s, SIOCGIFCONF, (caddr_t)&ifc) == 0)
> {
> buff = malloc(ifc.ifc_len);
> if (buff != NULL)
> {
> ifc.ifc_buf = buff;
>
> if (ioctl(s, SIOCGIFCONF, (caddr_t)&ifc) == 0)
> {
> for (i = 0; i < ifc.ifc_len / sizeof(struct ifreq); i++)
> {
> if( ifc.ifc_req[i].ifr_addr.sa_family == AF_INET )
> {
> struct sockaddr_in *addr;
> struct ifreq irq;
> int mask = 0;
> int index = if_nametoindex(ifc.ifc_req[i].ifr_name);
>
> strcpy(irq.ifr_name, ifc.ifc_req[i].ifr_name);
>
> if (ioctl(s, SIOCGIFNETMASK, &irq) == 0)
> {
> mask = 33 - ffs(htonl(((struct sockaddr_in *)
> &irq.ifr_addr)->sin_addr.s_addr));
> }
>
> addr = (struct sockaddr_in *)&(ifc.ifc_req[i].ifr_addr);
> printf("[%2d] %-8s %s/%d\n",
> index,
> ifc.ifc_req[i].ifr_name,
> inet_ntoa(addr->sin_addr),
> mask);
> }
> }
> }
> else
> {
> perror("sysctl-2()");
> }
>
> free(buff);
> }
> else
> {
> perror("malloc()");
> }
> }
> else
> {
> perror("sysctl-1()");
> return 0;
> }
> }
> else
> {
> perror("socket()");
> }
>
> return 0;
> }
>
> #endif
>
> ///////////////////////////////////////////////////////////////////////////////
> /*
>
> $Log$
>
> */

-- 
Alex Kirhenshtein
C.T.Co
Cellular: +371-9145688