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86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* source: hostan.c */
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/* Copyright Gerhard Rieger 2006-2012 */
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/* Published under the GNU General Public License V.2, see file COPYING */
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/* the subroutine hostan makes a "HOST ANalysis". It gathers information
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about the host environment it is running in without modifying its state
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(almost).
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*/
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#include "xiosysincludes.h"
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#include "mytypes.h"
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#include "compat.h"
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#include "error.h"
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#include "sycls.h"
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#include "sysutils.h"
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#include "filan.h"
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#include "hostan.h"
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static int iffan(FILE *outfile);
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int hostan(FILE *outfile) {
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#if _WITH_SOCKET
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fprintf(outfile, "\nIP INTERFACES\n");
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iffan(outfile);
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#endif
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return 0;
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}
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#if _WITH_SOCKET
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static int iffan(FILE *outfile) {
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/* Linux: man 7 netdevice */
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/* FreeBSD, NetBSD: man 4 networking */
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/* Solaris: man 7 if_tcp */
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/* currently we support Linux and a little FreeBSD */
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#ifdef SIOCGIFCONF /* not Solaris */
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#define IFBUFSIZ 32*sizeof(struct ifreq) /*1024*/
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int s;
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unsigned char buff[IFBUFSIZ];
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struct ifconf ic;
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int i;
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if ((s = Socket(PF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0) {
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Error1("socket(PF_INET, SOCK_DGRAM, IPPROTO_IP): %s", strerror(errno));
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return -1;
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}
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for (i=0; i < IFBUFSIZ; ++i) {
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buff[i] = 255;
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}
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ic.ifc_len = sizeof(buff);
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ic.ifc_ifcu.ifcu_buf = (caddr_t)buff;
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if (Ioctl(s, SIOCGIFCONF, &ic) < 0) {
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Error3("ioctl(%d, SIOCGIFCONF, %p): %s", s, &ic, strerror(errno));
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return -1;
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}
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for (i = 0; i < ic.ifc_len; i += sizeof(struct ifreq)) {
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struct ifreq *ifp = (struct ifreq *)((caddr_t)ic.ifc_req + i);
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#if 0 || defined(SIOCGIFINDEX) /* not NetBSD, OpenBSD */
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struct ifreq ifr;
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#endif
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#if 0 || defined(SIOCGIFINDEX) /* not NetBSD, OpenBSD */
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strcpy(ifr.ifr_name, ifp->ifr_name);
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if (Ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
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Error3("ioctl(%d, SIOCGIFINDEX, {\"%s\"}): %s",
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s, ifr.ifr_name, strerror(errno));
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return 1;
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}
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#if HAVE_STRUCT_IFREQ_IFR_INDEX
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fprintf(outfile, "%2d: %s\n", ifr.ifr_index, ifp->ifr_name);
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#elif HAVE_STRUCT_IFREQ_IFR_IFINDEX
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fprintf(outfile, "%2d: %s\n", ifr.ifr_ifindex, ifp->ifr_name);
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#endif /* HAVE_STRUCT_IFREQ_IFR_INDEX */
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#else /* !defined(SIOCGIFINDEX) */
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fprintf(outfile, "%2d: %s\n", i/(int)sizeof(struct ifreq), ifp->ifr_name);
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#endif /* defined(SIOCGIFINDEX) */
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}
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Close(s);
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#endif /* defined(SIOCGIFCONF) */
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return 0;
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}
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#endif /* _WITH_SOCKET */
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