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 1.2 2011/06/08 12:45:41 misho Exp $
7: *
8: *************************************************************************/
9: #include "global.h"
10: #include "get1steth.h"
11:
12:
13: char szIface[MAX_STR];
14: int Verbose;
15: extern char compiled[], compiledby[], compilehost[];
16:
17:
18: static void Usage()
19: {
20: printf("-= GET_FIRST_ETHERNET =- Get First Ethernet Interface tool\n"
21: "=== %s === %s@%s ===\n\n"
22: "Syntax: get1steth [option] [custom_first_interface]\n\n"
23: "\t-v\t\tVerbose (more -v more verbosity)\n"
24: "\t-g\t\tOnly get first interface, print and exit ...\n"
25: "\n", compiled, compiledby, compilehost);
26: }
27:
28: #ifdef HAVE_KLDNEXT
29: static int kldLoad()
30: {
31: struct module_stat mstat;
32: register int i, j;
33: u_char flg = 0;
34:
35: memset(&mstat, 0, sizeof mstat);
36: mstat.version = sizeof mstat;
37: for (i = kldnext(0); i > 0; i = kldnext(i))
38: for (j = kldfirstmod(i); j > 0; j = modfnext(j)) {
39: if (modstat(j, &mstat) == -1)
40: continue;
41:
42: if (!strncmp(MODVLAN, mstat.name, sizeof MODVLAN)) {
43: flg = 1;
44: break;
45: }
46: }
47: if (flg)
48: return 0;
49:
50: if (kldload(MODVLAN) == -1)
51: return -1;
52:
53: return 1;
54: }
55: #endif
56:
57: // -------------------------------
58:
59: int main(int argc, char **argv)
60: {
61: char ch, GetOnly = 0;
62: struct ifaddrs *ifa, *ifp;
63: struct sockaddr_dl *sdl;
64: struct sockaddr_in *sin;
65: struct ifreq ifr;
66: struct vlanreq vlr;
67: struct ifaliasreq ifra;
68: struct ifmediareq ifmr;
69: int s;
70:
71: while ((ch = getopt(argc, argv, "hvg")) != -1)
72: switch (ch) {
73: case 'g':
74: GetOnly = 1;
75: break;
76: case 'v':
77: Verbose++;
78: break;
79: case 'h':
80: default:
81: Usage();
82: return 1;
83: }
84: argc -= optind;
85: argv += optind;
86:
87: openlog("get1steth", LOG_CONS | LOG_PERROR, LOG_USER);
88:
89: if (argc) {
90: strlcpy(szIface, *argv, MAX_STR);
91: VERB(1) syslog(LOG_NOTICE, "Info:: Get CUSTOM first interface %s\n", szIface);
92: } else {
93: s = socket(PF_INET, SOCK_DGRAM, 0);
94: if (-1 == s) {
95: syslog(LOG_ERR, "Error:: socket(INET) #%d - %s\n", errno, strerror(errno));
96: closelog();
97: return 1;
98: }
99:
100: getifaddrs(&ifa);
101: for (ifp = ifa; ifp; ifp = ifp->ifa_next) {
102: if (PF_LINK == ifp->ifa_addr->sa_family &&
103: IFT_ETHER == ((struct sockaddr_dl*) ifp->ifa_addr)->sdl_type) {
104: memset(&ifmr, 0, sizeof ifmr);
105: strlcpy(ifmr.ifm_name, ifp->ifa_name, IFNAMSIZ);
106: if (ioctl(s, SIOCGIFMEDIA, &ifmr) == -1) {
107: syslog(LOG_ERR, "Error:: media interface=%s ioctl(SIOCGIFMEDIA) #%d - %s\n",
108: ifmr.ifm_name, errno, strerror(errno));
109: close(s);
110: closelog();
111: return 1;
112: }
113:
114: if (IFM_ETHER == IFM_TYPE(ifmr.ifm_current)) {
115: strlcpy(szIface, ifp->ifa_name, MAX_STR);
116: sdl = (struct sockaddr_dl*) ifp->ifa_addr;
117: VERB(2) syslog(LOG_NOTICE, "Info:: Get first interface=%s MAC=%s\n", szIface,
118: ether_ntoa((struct ether_addr*) LLADDR(sdl)));
119: break;
120: }
121: }
122: }
123: freeifaddrs(ifa);
124:
125: close(s);
126: }
127: if (!*szIface) {
128: syslog(LOG_NOTICE, "Info:: Ethernet interface not found!!!\n");
129:
130: closelog();
131: return 1;
132: }
133:
134: if (GetOnly) {
135: printf("%s\n", szIface);
136:
137: closelog();
138: return 0;
139: }
140:
141: #ifdef HAVE_KLDNEXT
142: s = kldLoad();
143: if (s == -1) {
144: syslog(LOG_ERR, "Error:: kldload(if_vlan) Can`t operate with vlans ...\n");
145: return 1;
146: } else
147: VERB(3) syslog(LOG_NOTICE, "VLAN module ... %s\n", s ? "Loaded" : "Already loaded");
148: #endif
149:
150: // create vlan
151: memset(&ifr, 0, sizeof ifr);
152: strlcpy(vlr.vlr_parent, szIface, IFNAMSIZ);
153: vlr.vlr_tag = MGMT_VTAG;
154:
155: strlcpy(ifr.ifr_name, MGMT_IFACE, IFNAMSIZ);
156: ifr.ifr_data = (void *) &vlr;
157:
158: s = socket(PF_INET, SOCK_DGRAM, 0);
159: if (-1 == s) {
160: syslog(LOG_ERR, "Error:: socket(INET) #%d - %s\n", errno, strerror(errno));
161: closelog();
162: return 2;
163: }
164: #ifdef SIOCIFCREATE2
165: if (ioctl(s, SIOCIFCREATE2, &ifr) == -1 && errno != EEXIST) {
166: #else
167: if (ioctl(s, SIOCIFCREATE, &ifr) == -1 && errno != EEXIST) {
168: #endif
169: syslog(LOG_ERR, "Error:: Create interface=%s ioctl(SIOCIFCREATE2) #%d - %s\n",
170: MGMT_IFACE, errno, strerror(errno));
171: close(s);
172: return 2;
173: } else
174: VERB(2) syslog(LOG_NOTICE, "Info:: Created interface=%s\n", MGMT_IFACE);
175: // rename iface
176: ifr.ifr_data = MGMT_NAME;
177: #ifdef SIOCSIFNAME
178: if (errno != EEXIST && ioctl(s, SIOCSIFNAME, &ifr) == -1) {
179: #else
180: if (errno != EEXIST && ioctl(s, SIOCGIFDESCR, &ifr) == -1) {
181: #endif
182: syslog(LOG_ERR, "Error:: Managment interface=%s ioctl(SIOCSIFNAME) #%d - %s\n",
183: MGMT_NAME, errno, strerror(errno));
184: close(s);
185: return 2;
186: } else
187: VERB(2) syslog(LOG_NOTICE, "Info:: Managment interface=%s\n", MGMT_NAME);
188:
189: // assign address & up
190: memset(&ifra, 0, sizeof ifra);
191: strlcpy(ifra.ifra_name, MGMT_NAME, IFNAMSIZ);
192: sin = (struct sockaddr_in*) &ifra.ifra_addr;
193: sin->sin_len = sizeof ifra.ifra_addr;
194: sin->sin_family = AF_INET;
195: sin->sin_addr.s_addr = inet_addr(MGMT_ADDR);
196: sin = (struct sockaddr_in*) &ifra.ifra_mask;
197: sin->sin_len = sizeof ifra.ifra_mask;
198: sin->sin_family = AF_INET;
199: sin->sin_addr.s_addr = inet_addr(MGMT_MASK);
200: if (ioctl(s, SIOCAIFADDR, &ifra) == -1) {
201: syslog(LOG_ERR, "Error:: IP %s ioctl(SIOCAIFADDR) #%d - %s\n",
202: MGMT_ADDR, errno, strerror(errno));
203: close(s);
204: return 2;
205: } else
206: VERB(2) syslog(LOG_NOTICE, "Info:: IP %s\n", MGMT_ADDR);
207:
208: close(s);
209: closelog();
210: return 0;
211: }
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