diff options
Diffstat (limited to 'networking/arping.c')
| -rw-r--r-- | networking/arping.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/networking/arping.c b/networking/arping.c index dbfd75e..8be1aac 100644 --- a/networking/arping.c +++ b/networking/arping.c @@ -13,11 +13,11 @@ //usage: "\n -f Quit on first ARP reply" //usage: "\n -q Quiet" //usage: "\n -b Keep broadcasting, don't go unicast" -//usage: "\n -D Duplicated address detection mode" +//usage: "\n -D Exit with 1 if DST_IP replies" //usage: "\n -U Unsolicited ARP mode, update your neighbors" //usage: "\n -A ARP answer mode, update your neighbors" //usage: "\n -c N Stop after sending N ARP requests" -//usage: "\n -w TIMEOUT Time to wait for ARP reply, seconds" +//usage: "\n -w TIMEOUT Seconds to wait for ARP reply" //usage: "\n -I IFACE Interface to use (default eth0)" //usage: "\n -s SRC_IP Sender IP address" //usage: "\n DST_IP Target IP address" @@ -162,7 +162,7 @@ static void catcher(void) alarm(1); } -static bool recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM) +static void recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM) { struct arphdr *ah = (struct arphdr *) buf; unsigned char *p = (unsigned char *) (ah + 1); @@ -181,33 +181,33 @@ static bool recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM) if (FROM->sll_pkttype != PACKET_HOST && FROM->sll_pkttype != PACKET_BROADCAST && FROM->sll_pkttype != PACKET_MULTICAST) - return false; + return; /* Only these types are recognized */ if (ah->ar_op != htons(ARPOP_REQUEST) && ah->ar_op != htons(ARPOP_REPLY)) - return false; + return; /* ARPHRD check and this darned FDDI hack here :-( */ if (ah->ar_hrd != htons(FROM->sll_hatype) && (FROM->sll_hatype != ARPHRD_FDDI || ah->ar_hrd != htons(ARPHRD_ETHER))) - return false; + return; /* Protocol must be IP. */ if (ah->ar_pro != htons(ETH_P_IP) || (ah->ar_pln != 4) || (ah->ar_hln != me.sll_halen) || (len < (int)(sizeof(*ah) + 2 * (4 + ah->ar_hln)))) - return false; + return; move_from_unaligned32(src_ip.s_addr, p + ah->ar_hln); move_from_unaligned32(dst_ip.s_addr, p + ah->ar_hln + 4 + ah->ar_hln); if (dst.s_addr != src_ip.s_addr) - return false; + return; if (!(option_mask32 & DAD)) { if ((src.s_addr != dst_ip.s_addr) - || (memcmp(p + ah->ar_hln + 4, &me.sll_addr, ah->ar_hln))) - return false; + || (memcmp(p + ah->ar_hln + 4, &me.sll_addr, ah->ar_hln))) + return; } else { /* DAD packet was: src_ip = 0 (or some src) @@ -224,7 +224,7 @@ static bool recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM) */ if ((memcmp(p, &me.sll_addr, me.sll_halen) == 0) || (src.s_addr && src.s_addr != dst_ip.s_addr)) - return false; + return; } if (!(option_mask32 & QUIET)) { int s_printed = 0; @@ -264,7 +264,6 @@ static bool recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM) memcpy(he.sll_addr, p, me.sll_halen); option_mask32 |= UNICASTING; } - return true; } int arping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |