107 lines
2.1 KiB
C
107 lines
2.1 KiB
C
#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <stdio.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <netdb.h>
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#include "rpc.h"
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/* call ioctl system call */
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ret_code if_ioctl(unsigned long request, caddr_t ifreq, int *ret)
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{
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int sock;
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int err = 0;
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if(ret)
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{
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*ret = 0;
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}
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sock = socket(AF_INET, SOCK_DGRAM, 0);
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if (sock < 0)
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{
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rpc_log_error("Cannot create UDP socket");
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return RET_SOCKERR;
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}
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if ((err = ioctl(sock, request, ifreq)) < 0)
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{
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rpc_log_error("Ioctl error: %s\n", strerror(errno));
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}
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close(sock);
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if (err < 0)
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{
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if(ret)
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{
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*ret = err;
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}
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return RET_SYSERR;
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}
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return RET_OK;
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}
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/* Set a certain interface flag. */
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static int if_set_flag(char *ifname, short flag, int *code)
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{
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struct ifreq ifr = {0};
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ret_code ret = RET_OK;
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strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
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ret = if_ioctl(SIOCGIFFLAGS, (caddr_t)&ifr, code);
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ASSERT_RET(ret);
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strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
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ifr.ifr_flags |= flag;
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ret = if_ioctl(SIOCSIFFLAGS, (caddr_t)&ifr, code);
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ASSERT_RET(ret);
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return ret;
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}
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/* Clear a certain interface flag. */
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static int if_clear_flag(char *ifname, short flag, int *code)
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{
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struct ifreq ifr = {0};
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ret_code ret;
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strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
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ret = if_ioctl(SIOCGIFFLAGS, (caddr_t)&ifr, code);
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ASSERT_RET(ret);
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strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
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ifr.ifr_flags &= ~flag;
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ret = if_ioctl(SIOCSIFFLAGS, (caddr_t)&ifr, code);
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ASSERT_RET(ret);
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return ret;
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}
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ret_code if_set_up(char *ifname, int *code)
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{
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return if_set_flag(ifname, (IFF_UP | IFF_RUNNING), code);
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}
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ret_code if_set_down(char *ifname, int *code)
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{
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return if_clear_flag(ifname, IFF_UP, code);
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}
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