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/* source: hostan.c */
/* Copyright Gerhard Rieger 2006-2008 */
/* Published under the GNU General Public License V.2, see file COPYING */
/* the subroutine hostan makes a "HOST ANalysis". It gathers information
about the host environment it is running in without modifying its state
(almost).
*/
#include "xiosysincludes.h"
#include "mytypes.h"
#include "compat.h"
#include "error.h"
#include "sycls.h"
#include "sysutils.h"
#include "filan.h"
#include "hostan.h"
static int iffan(FILE *outfile);
int hostan(FILE *outfile) {
#if _WITH_SOCKET
fprintf(outfile, "\nIP INTERFACES\n");
iffan(outfile);
#endif
return 0;
}
#if _WITH_SOCKET
static int iffan(FILE *outfile) {
/* Linux: man 7 netdevice */
/* FreeBSD, NetBSD: man 4 networking */
/* Solaris: man 7 if_tcp */
/* currently we support Linux and a little FreeBSD */
#ifdef SIOCGIFCONF /* not Solaris */
#define IFBUFSIZ 32*sizeof(struct ifreq) /*1024*/
int s;
unsigned char buff[IFBUFSIZ];
struct ifconf ic;
int i;
if ((s = Socket(PF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0) {
Error1("socket(PF_INET, SOCK_DGRAM, IPPROTO_IP): %s", strerror(errno));
return -1;
}
for (i=0; i < IFBUFSIZ; ++i) {
buff[i] = 255;
}
ic.ifc_len = sizeof(buff);
ic.ifc_ifcu.ifcu_buf = (caddr_t)buff;
if (Ioctl(s, SIOCGIFCONF, &ic) < 0) {
Error3("ioctl(%d, SIOCGIFCONF, %p): %s", s, &ic, strerror(errno));
return -1;
}
for (i = 0; i < ic.ifc_len; i += sizeof(struct ifreq)) {
struct ifreq *ifp = (struct ifreq *)((caddr_t)ic.ifc_req + i);
struct ifreq ifr;
#if 0 || defined(SIOCGIFINDEX) /* not NetBSD, OpenBSD */
strcpy(ifr.ifr_name, ifp->ifr_name);
if (Ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
Error3("ioctl(%d, SIOCGIFINDEX, {\"%s\"}): %s",
s, &ifr.ifr_name, strerror(errno));
return 1;
}
#if HAVE_STRUCT_IFREQ_IFR_INDEX
fprintf(outfile, "%2d: %s\n", ifr.ifr_index, ifp->ifr_name);
#elif HAVE_STRUCT_IFREQ_IFR_IFINDEX
fprintf(outfile, "%2d: %s\n", ifr.ifr_ifindex, ifp->ifr_name);
#endif /* HAVE_STRUCT_IFREQ_IFR_INDEX */
#else /* !defined(SIOCGIFINDEX) */
fprintf(outfile, "%2d: %s\n", i/sizeof(struct ifreq), ifp->ifr_name);
#endif /* defined(SIOCGIFINDEX) */
}
Close(s);
#endif /* defined(SIOCGIFCONF) */
return 0;
}
#endif /* _WITH_SOCKET */
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