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detect_wan: fix recvfrom result

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This commit is contained in:
andy.padavan
2012-06-03 00:43:46 +08:00
parent b974980ab0
commit 623b617d78
1 changed files with 6 additions and 2 deletions
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8
trunk/user/rc/detect_wan.c
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@@ -96,7 +96,7 @@ int arpping_gateway(void)
char wanmac[18];
char tmp[3];
char *ifname;
int s, i, rv;
int s, i, rv, rcv_bytes;
struct sockaddr addr;
struct ifreq ifr;
struct arpMsg arp;
@@ -189,7 +189,11 @@ int arpping_gateway(void)
timeStart = uptime();
for(;;)
{
if (recvfrom(s, &arp, sizeof(arp), 0, NULL, NULL) >= 42 &&
rcv_bytes = recvfrom(s, &arp, sizeof(arp), 0, NULL, NULL);
if (rcv_bytes < 0 && errno != EINTR)
break;
if (rcv_bytes >= 42 &&
arp.h_proto == htons(ETH_P_ARP) &&
arp.operation == htons(ARPOP_REPLY) &&
memcmp(arp.tHaddr, mac, 6) == 0 &&