+/* vi: set sw=4 ts=4: */
/*
* arpping.c
*
* by Yoichi Hariguchi <yoichi@fore.com>
*/
-#include <sys/time.h>
#include <time.h>
#include <sys/socket.h>
#include <netinet/if_ether.h>
* ip - our ip
* mac - our arp address
* interface - interface to use
- * retn: 1 addr free
+ * retn: 1 addr free
* 0 addr used
- * -1 error
- */
+ * -1 error
+ */
/* FIXME: match response against chaddr */
-int arpping(u_int32_t yiaddr, u_int32_t ip, unsigned char *mac, char *interface)
+int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
{
int timeout = 2;
- int optval = 1;
+ int optval = 1;
int s; /* socket */
int rv = 1; /* return value */
struct sockaddr addr; /* for interface name */
time_t prevTime;
- if ((s = socket (PF_PACKET, SOCK_PACKET, htons(ETH_P_ARP))) == -1) {
- LOG(LOG_ERR, bb_msg_can_not_create_raw_socket);
+ if ((s = socket(PF_PACKET, SOCK_PACKET, htons(ETH_P_ARP))) == -1) {
+ bb_perror_msg(bb_msg_can_not_create_raw_socket);
return -1;
}
-
+
if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &optval, sizeof(optval)) == -1) {
- LOG(LOG_ERR, "Could not setsocketopt on raw socket");
+ bb_perror_msg("Could not setsocketopt on raw socket");
close(s);
return -1;
}
/* send arp request */
memset(&arp, 0, sizeof(arp));
- memcpy(arp.ethhdr.h_dest, MAC_BCAST_ADDR, 6); /* MAC DA */
- memcpy(arp.ethhdr.h_source, mac, 6); /* MAC SA */
- arp.ethhdr.h_proto = htons(ETH_P_ARP); /* protocol type (Ethernet) */
+ memcpy(arp.h_dest, MAC_BCAST_ADDR, 6); /* MAC DA */
+ memcpy(arp.h_source, mac, 6); /* MAC SA */
+ arp.h_proto = htons(ETH_P_ARP); /* protocol type (Ethernet) */
arp.htype = htons(ARPHRD_ETHER); /* hardware type */
arp.ptype = htons(ETH_P_IP); /* protocol type (ARP message) */
arp.hlen = 6; /* hardware address length */
memcpy(arp.sInaddr, &ip, sizeof(ip)); /* source IP address */
memcpy(arp.sHaddr, mac, 6); /* source hardware address */
memcpy(arp.tInaddr, &yiaddr, sizeof(yiaddr)); /* target IP address */
-
+
memset(&addr, 0, sizeof(addr));
strcpy(addr.sa_data, interface);
if (sendto(s, &arp, sizeof(arp), 0, &addr, sizeof(addr)) < 0)
rv = 0;
-
+
/* wait arp reply, and check it */
tm.tv_usec = 0;
- time(&prevTime);
+ prevTime = uptime();
while (timeout > 0) {
FD_ZERO(&fdset);
FD_SET(s, &fdset);
tm.tv_sec = timeout;
if (select(s + 1, &fdset, (fd_set *) NULL, (fd_set *) NULL, &tm) < 0) {
- DEBUG(LOG_ERR, "Error on ARPING request: %m");
+ bb_perror_msg("Error on ARPING request");
if (errno != EINTR) rv = 0;
} else if (FD_ISSET(s, &fdset)) {
if (recv(s, &arp, sizeof(arp), 0) < 0 ) rv = 0;
- if (arp.operation == htons(ARPOP_REPLY) &&
- bcmp(arp.tHaddr, mac, 6) == 0 &&
- *((u_int *) arp.sInaddr) == yiaddr) {
- DEBUG(LOG_INFO, "Valid arp reply receved for this address");
+ if (arp.operation == htons(ARPOP_REPLY) &&
+ memcmp(arp.tHaddr, mac, 6) == 0 &&
+ *((uint32_t *) arp.sInaddr) == yiaddr) {
+ DEBUG("Valid arp reply received for this address");
rv = 0;
break;
}
}
- timeout -= time(NULL) - prevTime;
- time(&prevTime);
+ timeout -= uptime() - prevTime;
+ prevTime = uptime();
}
close(s);
- DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");
+ DEBUG("%salid arp replies for this address", rv ? "No v" : "V");
return rv;
}