1: /*************************************************************************
2: * (C) 2010 AITNET - Sofia/Bulgaria - <office@aitbg.com>
3: * by Michael Pounov <misho@aitbg.com>
4: *
5: * $Author: misho $
6: * $Id: get1steth.c,v 1.4 2013/01/18 12:58:14 misho Exp $
7: *
8: *************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #include "global.h"
47: #include "get1steth.h"
48:
49:
50: char szIface[STRSIZ];
51: int Verbose;
52: extern char compiled[], compiledby[], compilehost[];
53:
54:
55: static void Usage()
56: {
57: printf("-= GET_FIRST_ETHERNET =- Get First Ethernet Interface tool\n"
58: "=== %s === %s@%s ===\n\n"
59: "Syntax: get1steth [option] [custom_first_interface]\n\n"
60: "\t-v\t\tVerbose (more -v more verbosity)\n"
61: "\t-g\t\tOnly get first interface, print and exit ...\n"
62: "\n", compiled, compiledby, compilehost);
63: }
64:
65: #ifdef HAVE_KLDNEXT
66: static int kldLoad()
67: {
68: struct module_stat mstat;
69: register int i, j;
70: u_char flg = 0;
71:
72: memset(&mstat, 0, sizeof mstat);
73: mstat.version = sizeof mstat;
74: for (i = kldnext(0); i > 0; i = kldnext(i))
75: for (j = kldfirstmod(i); j > 0; j = modfnext(j)) {
76: if (modstat(j, &mstat) == -1)
77: continue;
78:
79: if (!strncmp(MODVLAN, mstat.name, sizeof MODVLAN)) {
80: flg = 1;
81: break;
82: }
83: }
84: if (flg)
85: return 0;
86:
87: if (kldload(MODVLAN) == -1)
88: return -1;
89:
90: return 1;
91: }
92: #endif
93:
94: // -------------------------------
95:
96: int main(int argc, char **argv)
97: {
98: char ch, GetOnly = 0;
99: struct ifaddrs *ifa, *ifp;
100: struct sockaddr_dl *sdl;
101: struct sockaddr_in *sin;
102: struct ifreq ifr;
103: struct vlanreq vlr;
104: struct ifaliasreq ifra;
105: struct ifmediareq ifmr;
106: int s;
107:
108: while ((ch = getopt(argc, argv, "hvg")) != -1)
109: switch (ch) {
110: case 'g':
111: GetOnly = 1;
112: break;
113: case 'v':
114: Verbose++;
115: break;
116: case 'h':
117: default:
118: Usage();
119: return 1;
120: }
121: argc -= optind;
122: argv += optind;
123:
124: openlog("get1steth", LOG_CONS | LOG_PERROR, LOG_USER);
125:
126: if (argc) {
127: strlcpy(szIface, *argv, sizeof szIface);
128: VERB(1) syslog(LOG_NOTICE, "Info:: Get CUSTOM first interface %s\n", szIface);
129: } else {
130: s = socket(PF_INET, SOCK_DGRAM, 0);
131: if (-1 == s) {
132: syslog(LOG_ERR, "Error:: socket(INET) #%d - %s\n", errno, strerror(errno));
133: closelog();
134: return 1;
135: }
136:
137: getifaddrs(&ifa);
138: for (ifp = ifa; ifp; ifp = ifp->ifa_next) {
139: if (PF_LINK == ifp->ifa_addr->sa_family &&
140: IFT_ETHER == ((struct sockaddr_dl*) ifp->ifa_addr)->sdl_type) {
141: memset(&ifmr, 0, sizeof ifmr);
142: strlcpy(ifmr.ifm_name, ifp->ifa_name, IFNAMSIZ);
143: if (ioctl(s, SIOCGIFMEDIA, &ifmr) == -1) {
144: syslog(LOG_ERR, "Error:: media interface=%s ioctl(SIOCGIFMEDIA) #%d - %s\n",
145: ifmr.ifm_name, errno, strerror(errno));
146: close(s);
147: closelog();
148: return 1;
149: }
150:
151: if (IFM_ETHER == IFM_TYPE(ifmr.ifm_current)) {
152: strlcpy(szIface, ifp->ifa_name, sizeof szIface);
153: sdl = (struct sockaddr_dl*) ifp->ifa_addr;
154: VERB(2) syslog(LOG_NOTICE, "Info:: Get first interface=%s MAC=%s\n", szIface,
155: ether_ntoa((struct ether_addr*) LLADDR(sdl)));
156: break;
157: }
158: }
159: }
160: freeifaddrs(ifa);
161:
162: close(s);
163: }
164: if (!*szIface) {
165: syslog(LOG_NOTICE, "Info:: Ethernet interface not found!!!\n");
166:
167: closelog();
168: return 1;
169: }
170:
171: if (GetOnly) {
172: printf("%s\n", szIface);
173:
174: closelog();
175: return 0;
176: }
177:
178: #ifdef HAVE_KLDNEXT
179: s = kldLoad();
180: if (s == -1) {
181: syslog(LOG_ERR, "Error:: kldload(if_vlan) Can`t operate with vlans ...\n");
182: return 1;
183: } else
184: VERB(3) syslog(LOG_NOTICE, "VLAN module ... %s\n", s ? "Loaded" : "Already loaded");
185: #endif
186:
187: // create vlan
188: memset(&ifr, 0, sizeof ifr);
189: strlcpy(vlr.vlr_parent, szIface, IFNAMSIZ);
190: vlr.vlr_tag = MGMT_VTAG;
191:
192: strlcpy(ifr.ifr_name, MGMT_IFACE, IFNAMSIZ);
193: ifr.ifr_data = (void *) &vlr;
194:
195: s = socket(PF_INET, SOCK_DGRAM, 0);
196: if (-1 == s) {
197: syslog(LOG_ERR, "Error:: socket(INET) #%d - %s\n", errno, strerror(errno));
198: closelog();
199: return 2;
200: }
201: #ifdef SIOCIFCREATE2
202: if (ioctl(s, SIOCIFCREATE2, &ifr) == -1 && errno != EEXIST) {
203: #else
204: if (ioctl(s, SIOCIFCREATE, &ifr) == -1 && errno != EEXIST) {
205: #endif
206: syslog(LOG_ERR, "Error:: Create interface=%s ioctl(SIOCIFCREATE2) #%d - %s\n",
207: MGMT_IFACE, errno, strerror(errno));
208: close(s);
209: return 2;
210: }
211:
212: memset(&ifra, 0, sizeof ifra);
213: #if defined(__FreeBSD__)
214: // rename iface
215: VERB(2) syslog(LOG_NOTICE, "Info:: Created interface=%s\n", MGMT_IFACE);
216: ifr.ifr_data = MGMT_NAME;
217: if (errno != EEXIST && ioctl(s, SIOCSIFNAME, &ifr) == -1) {
218: syslog(LOG_ERR, "Error:: Managment interface=%s ioctl(SIOCSIFNAME) #%d - %s\n",
219: MGMT_NAME, errno, strerror(errno));
220: close(s);
221: return 2;
222: } else
223: VERB(2) syslog(LOG_NOTICE, "Info:: Managment interface=%s\n", MGMT_NAME);
224: strlcpy(ifra.ifra_name, MGMT_NAME, IFNAMSIZ);
225: #else
226: strlcpy(ifra.ifra_name, MGMT_IFACE, IFNAMSIZ);
227: #endif
228:
229: // assign address & up
230: sin = (struct sockaddr_in*) &ifra.ifra_addr;
231: sin->sin_len = sizeof ifra.ifra_addr;
232: sin->sin_family = AF_INET;
233: sin->sin_addr.s_addr = inet_addr(MGMT_ADDR);
234: sin = (struct sockaddr_in*) &ifra.ifra_mask;
235: sin->sin_len = sizeof ifra.ifra_mask;
236: sin->sin_family = AF_INET;
237: sin->sin_addr.s_addr = inet_addr(MGMT_MASK);
238: if (ioctl(s, SIOCAIFADDR, &ifra) == -1) {
239: syslog(LOG_ERR, "Error:: IP %s ioctl(SIOCAIFADDR) #%d - %s\n",
240: MGMT_ADDR, errno, strerror(errno));
241: close(s);
242: return 2;
243: } else
244: VERB(2) syslog(LOG_NOTICE, "Info:: IP %s\n", MGMT_ADDR);
245:
246: close(s);
247: closelog();
248: return 0;
249: }
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