net_user.c revision da00d9a5466558ccd9e7b7d04b13d7cb9160c876
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Licensed under the GPL 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <stddef.h> 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <stdarg.h> 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <unistd.h> 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <stdio.h> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <errno.h> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <stdlib.h> 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <string.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <sys/socket.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <sys/wait.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "user.h" 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "user_util.h" 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "kern_util.h" 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "net_user.h" 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "helper.h" 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "os.h" 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint tap_open_common(void *dev, char *gate_addr) 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tap_addr[4]; 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(gate_addr == NULL) return(0); 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(sscanf(gate_addr, "%d.%d.%d.%d", &tap_addr[0], 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &tap_addr[1], &tap_addr[2], &tap_addr[3]) != 4){ 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("Invalid tap IP address - '%s'\n", gate_addr); 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(-EINVAL); 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(0); 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35da00d9a5466558ccd9e7b7d04b13d7cb9160c876Jeff Dikevoid tap_check_ips(char *gate_addr, unsigned char *eth_addr) 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tap_addr[4]; 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if((gate_addr != NULL) && 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (sscanf(gate_addr, "%d.%d.%d.%d", &tap_addr[0], 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &tap_addr[1], &tap_addr[2], &tap_addr[3]) == 4) && 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (eth_addr[0] == tap_addr[0]) && 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (eth_addr[1] == tap_addr[1]) && 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (eth_addr[2] == tap_addr[2]) && 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (eth_addr[3] == tap_addr[3])){ 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("The tap IP address and the UML eth IP address" 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds " must be different\n"); 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid read_output(int fd, char *output, int len) 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int remain, n, actual; 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char c; 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(output == NULL){ 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds output = &c; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof(c); 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *output = '\0'; 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = os_read_file(fd, &remain, sizeof(remain)); 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(n != sizeof(remain)){ 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("read_output - read of length failed, err = %d\n", -n); 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(remain != 0){ 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = (remain < len) ? remain : len; 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds actual = os_read_file(fd, output, n); 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(actual != n){ 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("read_output - read of data failed, " 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "err = %d\n", -actual); 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remain -= actual; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint net_read(int fd, void *buf, int len) 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = os_read_file(fd, buf, len); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(n == -EAGAIN) 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(0); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if(n == 0) 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(-ENOTCONN); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(n); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint net_recvfrom(int fd, void *buf, int len) 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(((n = recvfrom(fd, buf, len, 0, NULL, NULL)) < 0) && 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (errno == EINTR)) ; 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(n < 0){ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(errno == EAGAIN) return(0); 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(-errno); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if(n == 0) return(-ENOTCONN); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(n); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint net_write(int fd, void *buf, int len) 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = os_write_file(fd, buf, len); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(n == -EAGAIN) 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(0); 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if(n == 0) 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(-ENOTCONN); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(n); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint net_send(int fd, void *buf, int len) 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(((n = send(fd, buf, len, 0)) < 0) && (errno == EINTR)) ; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(n < 0){ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(errno == EAGAIN) return(0); 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(-errno); 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if(n == 0) return(-ENOTCONN); 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(n); 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint net_sendto(int fd, void *buf, int len, void *to, int sock_len) 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(((n = sendto(fd, buf, len, 0, (struct sockaddr *) to, 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sock_len)) < 0) && (errno == EINTR)) ; 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(n < 0){ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(errno == EAGAIN) return(0); 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(-errno); 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if(n == 0) return(-ENOTCONN); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(n); 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct change_pre_exec_data { 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int close_me; 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int stdout; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void change_pre_exec(void *arg) 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct change_pre_exec_data *data = arg; 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds os_close_file(data->close_me); 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dup2(data->stdout, 1); 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int change_tramp(char **argv, char *output, int output_len) 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int pid, fds[2], err; 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct change_pre_exec_data pe_data; 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = os_pipe(fds, 1, 0); 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(err < 0){ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("change_tramp - pipe failed, err = %d\n", -err); 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(err); 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pe_data.close_me = fds[0]; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pe_data.stdout = fds[1]; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pid = run_helper(change_pre_exec, &pe_data, argv, NULL); 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_output(fds[0], output, output_len); 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds os_close_file(fds[0]); 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds os_close_file(fds[1]); 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pid > 0) 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CATCH_EINTR(err = waitpid(pid, NULL, 0)); 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(pid); 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void change(char *dev, char *what, unsigned char *addr, 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *netmask) 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char addr_buf[sizeof("255.255.255.255\0")]; 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char netmask_buf[sizeof("255.255.255.255\0")]; 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char version[sizeof("nnnnn\0")]; 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *argv[] = { "uml_net", version, what, dev, addr_buf, 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netmask_buf, NULL }; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *output; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int output_len, pid; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(version, "%d", UML_NET_VERSION); 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(addr_buf, "%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]); 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(netmask_buf, "%d.%d.%d.%d", netmask[0], netmask[1], 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netmask[2], netmask[3]); 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds output_len = page_size(); 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds output = um_kmalloc(output_len); 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(output == NULL) 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("change : failed to allocate output buffer\n"); 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pid = change_tramp(argv, output, output_len); 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(pid < 0) return; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(output != NULL){ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s", output); 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(output); 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid open_addr(unsigned char *addr, unsigned char *netmask, void *arg) 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds change(arg, "add", addr, netmask); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid close_addr(unsigned char *addr, unsigned char *netmask, void *arg) 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds change(arg, "del", addr, netmask); 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldschar *split_if_spec(char *str, ...) 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char **arg, *end; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds va_list ap; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds va_start(ap, str); 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while((arg = va_arg(ap, char **)) != NULL){ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(*str == '\0') 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(NULL); 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds end = strchr(str, ','); 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(end != str) 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *arg = str; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(end == NULL) 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(NULL); 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *end++ = '\0'; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds str = end; 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds va_end(ap); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(str); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Overrides for Emacs so that we follow Linus's tabbing style. 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Emacs will notice this stuff at the end of the file and automatically 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * adjust the settings for this buffer only. This must remain at the end 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of the file. 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * --------------------------------------------------------------------------- 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Local variables: 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * c-file-style: "linux" 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * End: 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 256