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net: tftpput: Move ICMP code into its own function

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NetReceive() is a very long function with a lot of indent. Before adding
code to the ICMP bit, split it out.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2011-10-24 18:00:00 +00:00 • committed by Wolfgang Denk
parent d67f10ce0f
commit 8f79bb17a4
1 changed files with 58 additions and 43 deletions
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101
net/net.c
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@ -1331,6 +1331,62 @@ static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
}
#endif
/**
* Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
* drop others.
*
* @parma ip IP packet containing the ICMP
*/
static void receive_icmp(IP_t *ip, int len, IPaddr_t src_ip, Ethernet_t *et)
{
ICMP_t *icmph = (ICMP_t *)&ip->udp_src;
switch (icmph->type) {
case ICMP_REDIRECT:
if (icmph->code != ICMP_REDIR_HOST)
return;
printf(" ICMP Host Redirect to %pI4 ",
&icmph->un.gateway);
break;
#if defined(CONFIG_CMD_PING)
case ICMP_ECHO_REPLY:
/*
* IP header OK. Pass the packet to the
* current handler.
*/
/*
* XXX point to ip packet - should this use
* packet_icmp_handler?
*/
(*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
break;
case ICMP_ECHO_REQUEST:
debug("Got ICMP ECHO REQUEST, return %d bytes\n",
ETHER_HDR_SIZE + len);
memcpy(&et->et_dest[0], &et->et_src[0], 6);
memcpy(&et->et_src[0], NetOurEther, 6);
ip->ip_sum = 0;
ip->ip_off = 0;
NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
NetCopyIP((void *)&ip->ip_src, &NetOurIP);
ip->ip_sum = ~NetCksum((uchar *)ip,
IP_HDR_SIZE_NO_UDP >> 1);
icmph->type = ICMP_ECHO_REPLY;
icmph->checksum = 0;
icmph->checksum = ~NetCksum((uchar *)icmph,
(len - IP_HDR_SIZE_NO_UDP) >> 1);
(void) eth_send((uchar *)et,
ETHER_HDR_SIZE + len);
break;
#endif
default:
break;
}
}
void
NetReceive(volatile uchar *inpkt, int len)
{
@ -1617,49 +1673,8 @@ NetReceive(volatile uchar *inpkt, int len)
* sure if there aren't any other situations.
*/
if (ip->ip_p == IPPROTO_ICMP) {
ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
switch (icmph->type) {
case ICMP_REDIRECT:
if (icmph->code != ICMP_REDIR_HOST)
return;
printf(" ICMP Host Redirect to %pI4 ",
&icmph->un.gateway);
return;
#if defined(CONFIG_CMD_PING)
case ICMP_ECHO_REPLY:
/*
* IP header OK. Pass the packet to the
* current handler.
*/
/* XXX point to ip packet */
(*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
return;
case ICMP_ECHO_REQUEST:
debug("Got ICMP ECHO REQUEST, return %d bytes\n",
ETHER_HDR_SIZE + len);
memcpy(&et->et_dest[0], &et->et_src[0], 6);
memcpy(&et->et_src[0], NetOurEther, 6);
ip->ip_sum = 0;
ip->ip_off = 0;
NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
NetCopyIP((void *)&ip->ip_src, &NetOurIP);
ip->ip_sum = ~NetCksum((uchar *)ip,
IP_HDR_SIZE_NO_UDP >> 1);
icmph->type = ICMP_ECHO_REPLY;
icmph->checksum = 0;
icmph->checksum = ~NetCksum((uchar *)icmph,
(len - IP_HDR_SIZE_NO_UDP) >> 1);
(void) eth_send((uchar *)et,
ETHER_HDR_SIZE + len);
return;
#endif
default:
return;
}
receive_icmp(ip, len, src_ip, et);
return;
} else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
return;
}