175 lines
4 KiB
C
175 lines
4 KiB
C
/* system/bin/netcfg/netcfg.c
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**
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** Copyright 2006, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <dirent.h>
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static int verbose = 0;
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int ifc_init();
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void ifc_close();
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int ifc_up(char *iname);
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int ifc_down(char *iname);
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int ifc_remove_host_routes(char *iname);
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int ifc_remove_default_route(char *iname);
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int ifc_get_info(const char *name, unsigned *addr, unsigned *mask, unsigned *flags);
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int do_dhcp(char *iname);
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void die(const char *reason)
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{
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perror(reason);
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exit(1);
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}
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const char *ipaddr(unsigned addr)
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{
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static char buf[32];
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sprintf(buf,"%d.%d.%d.%d",
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addr & 255,
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((addr >> 8) & 255),
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((addr >> 16) & 255),
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(addr >> 24));
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return buf;
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}
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void usage(void)
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{
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fprintf(stderr,"usage: netcfg [<interface> {dhcp|up|down}]\n");
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exit(1);
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}
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int dump_interface(const char *name)
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{
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unsigned addr, mask, flags;
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if(ifc_get_info(name, &addr, &mask, &flags)) {
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return 0;
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}
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printf("%-8s %s ", name, flags & 1 ? "UP " : "DOWN");
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printf("%-16s", ipaddr(addr));
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printf("%-16s", ipaddr(mask));
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printf("0x%08x\n", flags);
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return 0;
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}
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int dump_interfaces(void)
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{
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DIR *d;
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struct dirent *de;
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d = opendir("/sys/class/net");
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if(d == 0) return -1;
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while((de = readdir(d))) {
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if(de->d_name[0] == '.') continue;
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dump_interface(de->d_name);
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}
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closedir(d);
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return 0;
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}
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struct
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{
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const char *name;
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int nargs;
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void *func;
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} CMDS[] = {
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{ "dhcp", 1, do_dhcp },
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{ "up", 1, ifc_up },
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{ "down", 1, ifc_down },
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{ "flhosts", 1, ifc_remove_host_routes },
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{ "deldefault", 1, ifc_remove_default_route },
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{ 0, 0, 0 },
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};
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static int call_func(void *_func, unsigned nargs, char **args)
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{
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switch(nargs){
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case 1: {
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int (*func)(char *a0) = _func;
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return func(args[0]);
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}
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case 2: {
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int (*func)(char *a0, char *a1) = _func;
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return func(args[0], args[1]);
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}
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case 3: {
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int (*func)(char *a0, char *a1, char *a2) = _func;
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return func(args[0], args[1], args[2]);
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}
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default:
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return -1;
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}
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}
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int main(int argc, char **argv)
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{
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char *iname;
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int n;
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if(ifc_init()) {
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die("Cannot perform requested operation");
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}
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if(argc == 1) {
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int result = dump_interfaces();
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ifc_close();
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return result;
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}
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if(argc < 3) usage();
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iname = argv[1];
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if(strlen(iname) > 16) usage();
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argc -= 2;
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argv += 2;
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while(argc > 0) {
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for(n = 0; CMDS[n].name; n++){
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if(!strcmp(argv[0], CMDS[n].name)) {
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char *cmdname = argv[0];
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int nargs = CMDS[n].nargs;
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argv[0] = iname;
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if(argc < nargs) {
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fprintf(stderr, "not enough arguments for '%s'\n", cmdname);
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ifc_close();
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exit(1);
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}
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if(call_func(CMDS[n].func, nargs, argv)) {
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fprintf(stderr, "action '%s' failed (%s)\n", cmdname, strerror(errno));
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ifc_close();
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exit(1);
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}
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argc -= nargs;
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argv += nargs;
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goto done;
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}
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}
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fprintf(stderr,"no such action '%s'\n", argv[0]);
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usage();
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done:
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;
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}
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ifc_close();
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return 0;
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}
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