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Checked in patch #6760 (ping calculates incorrect checksum) - slightly modified

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This commit is contained in:
goldsimon 2009-03-01 17:20:53 +00:00
parent 03534b658a
commit 15d75600bb
1 changed files with 7 additions and 5 deletions
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12
apps/ping/ping.c
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@ -105,19 +105,21 @@ u32_t sys_now();
static void
ping_prepare_echo( struct icmp_echo_hdr *iecho, u16_t len)
{
int i;
size_t i;
size_t data_len = len - sizeof(struct icmp_echo_hdr);
ICMPH_TYPE_SET(iecho,ICMP_ECHO);
ICMPH_TYPE_SET(iecho, ICMP_ECHO);
ICMPH_CODE_SET(iecho, 0);
iecho->chksum = 0;
iecho->id = PING_ID;
iecho->seqno = htons(++ping_seq_num);
iecho->chksum = inet_chksum(iecho, len);
/* fill the additional data buffer with some data */
for(i = 0; i < PING_DATA_SIZE; i++) {
((char*)iecho)[sizeof(struct icmp_echo_hdr) + i] = i;
for(i = 0; i < data_len; i++) {
((char*)iecho)[sizeof(struct icmp_echo_hdr) + i] = (char)i;
}
iecho->chksum = inet_chksum(iecho, len);
}
#if LWIP_SOCKET