1/* system/bin/netcfg/netcfg.c
2**
3** Copyright 2006, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#include <stdio.h>
19#include <stdlib.h>
20#include <errno.h>
21#include <dirent.h>
22#include <netinet/ether.h>
23#include <netinet/if_ether.h>
24
25#include <netutils/ifc.h>
26#include <netutils/dhcp.h>
27
28static int verbose = 0;
29
30
31void die(const char *reason)
32{
33    perror(reason);
34    exit(1);
35}
36
37const char *ipaddr(in_addr_t addr)
38{
39    struct in_addr in_addr;
40
41    in_addr.s_addr = addr;
42    return inet_ntoa(in_addr);
43}
44
45void usage(void)
46{
47    fprintf(stderr,"usage: netcfg [<interface> {dhcp|up|down}]\n");
48    exit(1);
49}
50
51int dump_interface(const char *name)
52{
53    unsigned addr, flags;
54    unsigned char hwbuf[ETH_ALEN];
55    int prefixLength;
56
57    if(ifc_get_info(name, &addr, &prefixLength, &flags)) {
58        return 0;
59    }
60
61    printf("%-8s %s  ", name, flags & 1 ? "UP  " : "DOWN");
62    printf("%40s", ipaddr(addr));
63    printf("/%-4d", prefixLength);
64    printf("0x%08x ", flags);
65    if (!ifc_get_hwaddr(name, hwbuf)) {
66        int i;
67        for(i=0; i < (ETH_ALEN-1); i++)
68            printf("%02x:", hwbuf[i]);
69        printf("%02x\n", hwbuf[i]);
70    } else {
71        printf("\n");
72    }
73    return 0;
74}
75
76int dump_interfaces(void)
77{
78    DIR *d;
79    struct dirent *de;
80
81    d = opendir("/sys/class/net");
82    if(d == 0) return -1;
83
84    while((de = readdir(d))) {
85        if(de->d_name[0] == '.') continue;
86        dump_interface(de->d_name);
87    }
88    closedir(d);
89    return 0;
90}
91
92int set_hwaddr(const char *name, const char *asc) {
93    struct ether_addr *addr = ether_aton(asc);
94    if (!addr) {
95        printf("Failed to parse '%s'\n", asc);
96        return -1;
97    }
98    return ifc_set_hwaddr(name, addr->ether_addr_octet);
99}
100
101struct
102{
103    const char *name;
104    int nargs;
105    void *func;
106} CMDS[] = {
107    { "dhcp",   1, do_dhcp },
108    { "up",     1, ifc_up },
109    { "down",   1, ifc_down },
110    { "flhosts",  1, ifc_remove_host_routes },
111    { "deldefault", 1, ifc_remove_default_route },
112    { "hwaddr", 2, set_hwaddr },
113    { 0, 0, 0 },
114};
115
116static int call_func(void *_func, unsigned nargs, char **args)
117{
118    switch(nargs){
119    case 1: {
120        int (*func)(char *a0) = _func;
121        return func(args[0]);
122    }
123    case 2: {
124        int (*func)(char *a0, char *a1) = _func;
125        return func(args[0], args[1]);
126    }
127    case 3: {
128        int (*func)(char *a0, char *a1, char *a2) = _func;
129        return func(args[0], args[1], args[2]);
130    }
131    default:
132        return -1;
133    }
134}
135
136int main(int argc, char **argv)
137{
138    char *iname;
139    int n;
140
141    if(ifc_init()) {
142        die("Cannot perform requested operation");
143    }
144
145    if(argc == 1) {
146        int result = dump_interfaces();
147        ifc_close();
148        return result;
149    }
150
151    if(argc < 3) usage();
152
153    iname = argv[1];
154    if(strlen(iname) > 16) usage();
155
156    argc -= 2;
157    argv += 2;
158    while(argc > 0) {
159        for(n = 0; CMDS[n].name; n++){
160            if(!strcmp(argv[0], CMDS[n].name)) {
161                char *cmdname = argv[0];
162                int nargs = CMDS[n].nargs;
163
164                argv[0] = iname;
165                if(argc < nargs) {
166                    fprintf(stderr, "not enough arguments for '%s'\n", cmdname);
167                    ifc_close();
168                    exit(1);
169                }
170                if(call_func(CMDS[n].func, nargs, argv)) {
171                    fprintf(stderr, "action '%s' failed (%s)\n", cmdname, strerror(errno));
172                    ifc_close();
173                    exit(1);
174                }
175                argc -= nargs;
176                argv += nargs;
177                goto done;
178            }
179        }
180        fprintf(stderr,"no such action '%s'\n", argv[0]);
181        usage();
182    done:
183        ;
184    }
185    ifc_close();
186
187    return 0;
188}
189