/************************************************************************* * (C) 2010 AITNET - Sofia/Bulgaria - * by Michael Pounov * * $Author: misho $ * $Id: get1steth.c,v 1.5 2014/02/05 15:44:06 misho Exp $ * ************************************************************************* The ELWIX and AITNET software is distributed under the following terms: All of the documentation and software included in the ELWIX and AITNET Releases is copyrighted by ELWIX - Sofia/Bulgaria Copyright 2004 - 2014 by Michael Pounov . All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. All advertising materials mentioning features or use of this software must display the following acknowledgement: This product includes software developed by Michael Pounov ELWIX - Embedded LightWeight unIX and its contributors. 4. Neither the name of AITNET nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "global.h" #include "get1steth.h" char szIface[STRSIZ]; int Verbose; extern char compiled[], compiledby[], compilehost[]; static void Usage() { printf("-= GET_FIRST_ETHERNET =- Get First Ethernet Interface tool\n" "=== %s === %s@%s ===\n\n" "Syntax: get1steth [option] [custom_first_interface]\n\n" "\t-v\t\tVerbose (more -v more verbosity)\n" "\t-g\t\tOnly get first interface, print and exit ...\n" "\n", compiled, compiledby, compilehost); } #ifdef HAVE_KLDNEXT static int kldLoad() { struct module_stat mstat; register int i, j; u_char flg = 0; memset(&mstat, 0, sizeof mstat); mstat.version = sizeof mstat; for (i = kldnext(0); i > 0; i = kldnext(i)) for (j = kldfirstmod(i); j > 0; j = modfnext(j)) { if (modstat(j, &mstat) == -1) continue; if (!strncmp(MODVLAN, mstat.name, sizeof MODVLAN)) { flg = 1; break; } } if (flg) return 0; if (kldload(MODVLAN) == -1) return -1; return 1; } #endif // ------------------------------- int main(int argc, char **argv) { char ch, GetOnly = 0; struct ifaddrs *ifa, *ifp; struct sockaddr_dl *sdl; struct sockaddr_in *sin; struct ifreq ifr; struct vlanreq vlr; struct ifaliasreq ifra; struct ifmediareq ifmr; int s; while ((ch = getopt(argc, argv, "hvg")) != -1) switch (ch) { case 'g': GetOnly = 1; break; case 'v': Verbose++; break; case 'h': default: Usage(); return 1; } argc -= optind; argv += optind; openlog("get1steth", LOG_CONS | LOG_PERROR, LOG_USER); if (argc) { strlcpy(szIface, *argv, sizeof szIface); VERB(1) syslog(LOG_NOTICE, "Info:: Get CUSTOM first interface %s\n", szIface); } else { s = socket(PF_INET, SOCK_DGRAM, 0); if (-1 == s) { syslog(LOG_ERR, "Error:: socket(INET) #%d - %s\n", errno, strerror(errno)); closelog(); return 1; } getifaddrs(&ifa); for (ifp = ifa; ifp; ifp = ifp->ifa_next) { if (PF_LINK == ifp->ifa_addr->sa_family && IFT_ETHER == ((struct sockaddr_dl*) ifp->ifa_addr)->sdl_type) { memset(&ifmr, 0, sizeof ifmr); strlcpy(ifmr.ifm_name, ifp->ifa_name, IFNAMSIZ); if (ioctl(s, SIOCGIFMEDIA, &ifmr) == -1) { syslog(LOG_ERR, "Error:: media interface=%s ioctl(SIOCGIFMEDIA) #%d - %s\n", ifmr.ifm_name, errno, strerror(errno)); close(s); closelog(); return 1; } if (IFM_ETHER == IFM_TYPE(ifmr.ifm_current)) { strlcpy(szIface, ifp->ifa_name, sizeof szIface); sdl = (struct sockaddr_dl*) ifp->ifa_addr; VERB(2) syslog(LOG_NOTICE, "Info:: Get first interface=%s MAC=%s\n", szIface, ether_ntoa((struct ether_addr*) LLADDR(sdl))); break; } } } freeifaddrs(ifa); close(s); } if (!*szIface) { syslog(LOG_NOTICE, "Info:: Ethernet interface not found!!!\n"); closelog(); return 1; } if (GetOnly) { printf("%s\n", szIface); closelog(); return 0; } #ifdef HAVE_KLDNEXT s = kldLoad(); if (s == -1) { syslog(LOG_ERR, "Error:: kldload(if_vlan) Can`t operate with vlans ...\n"); return 1; } else VERB(3) syslog(LOG_NOTICE, "VLAN module ... %s\n", s ? "Loaded" : "Already loaded"); #endif s = socket(PF_INET, SOCK_DGRAM, 0); if (-1 == s) { syslog(LOG_ERR, "Error:: socket(INET) #%d - %s\n", errno, strerror(errno)); closelog(); return 2; } /* up parent interface */ memset(&ifr, 0, sizeof ifr); strlcpy(ifr.ifr_name, szIface, IFNAMSIZ); ifr.ifr_flags |= IFF_UP; if (ioctl(s, SIOCSIFFLAGS, &ifr) == -1 && errno != EEXIST) { syslog(LOG_ERR, "Error:: UP interface=%s ioctl(SIOCSIFFLAGS) #%d - %s\n", szIface, errno, strerror(errno)); close(s); return 2; } /* create vlan */ memset(&ifr, 0, sizeof ifr); strlcpy(vlr.vlr_parent, szIface, IFNAMSIZ); vlr.vlr_tag = MGMT_VTAG; strlcpy(ifr.ifr_name, MGMT_IFACE, IFNAMSIZ); ifr.ifr_data = (void *) &vlr; #ifdef SIOCIFCREATE2 if (ioctl(s, SIOCIFCREATE2, &ifr) == -1 && errno != EEXIST) { #else if (ioctl(s, SIOCIFCREATE, &ifr) == -1 && errno != EEXIST) { #endif syslog(LOG_ERR, "Error:: Create interface=%s ioctl(SIOCIFCREATE2) #%d - %s\n", MGMT_IFACE, errno, strerror(errno)); close(s); return 2; } memset(&ifra, 0, sizeof ifra); #if defined(__FreeBSD__) /* rename iface */ VERB(2) syslog(LOG_NOTICE, "Info:: Created interface=%s\n", MGMT_IFACE); ifr.ifr_data = MGMT_NAME; if (errno != EEXIST && ioctl(s, SIOCSIFNAME, &ifr) == -1) { syslog(LOG_ERR, "Error:: Managment interface=%s ioctl(SIOCSIFNAME) #%d - %s\n", MGMT_NAME, errno, strerror(errno)); close(s); return 2; } else VERB(2) syslog(LOG_NOTICE, "Info:: Managment interface=%s\n", MGMT_NAME); strlcpy(ifra.ifra_name, MGMT_NAME, IFNAMSIZ); #else strlcpy(ifra.ifra_name, MGMT_IFACE, IFNAMSIZ); #endif /* assign address & up */ sin = (struct sockaddr_in*) &ifra.ifra_addr; sin->sin_len = sizeof ifra.ifra_addr; sin->sin_family = AF_INET; sin->sin_addr.s_addr = inet_addr(MGMT_ADDR); sin = (struct sockaddr_in*) &ifra.ifra_mask; sin->sin_len = sizeof ifra.ifra_mask; sin->sin_family = AF_INET; sin->sin_addr.s_addr = inet_addr(MGMT_MASK); if (ioctl(s, SIOCAIFADDR, &ifra) == -1) { syslog(LOG_ERR, "Error:: IP %s ioctl(SIOCAIFADDR) #%d - %s\n", MGMT_ADDR, errno, strerror(errno)); close(s); return 2; } else VERB(2) syslog(LOG_NOTICE, "Info:: IP %s\n", MGMT_ADDR); close(s); closelog(); return 0; }