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Coding style: use named constants instead of numbers only

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This commit is contained in:
goldsimon 2008-01-27 11:22:14 +00:00
parent 7b11fb75d9
commit c54777d957
1 changed files with 13 additions and 8 deletions
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21
src/core/ipv4/icmp.c
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@ -53,6 +53,9 @@
#include <string.h>
/* The amount of data from the original packet to return in a dest-unreachable */
#define ICMP_DEST_UNREACH_DATASIZE 8
/**
* Processes ICMP input packets, called from ip_input().
*
@ -225,15 +228,15 @@ icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
struct ip_hdr *iphdr;
struct icmp_dur_hdr *idur;
/* @todo: can this be PBUF_LINK instead of PBUF_IP? */
q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM);
/* ICMP header + IP header + 8 bytes of data */
q = pbuf_alloc(PBUF_IP, sizeof(struct icmp_dur_hdr) + IP_HLEN + ICMP_DEST_UNREACH_DATASIZE,
PBUF_RAM);
if (q == NULL) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_dest_unreach: failed to allocate pbuf for ICMP packet.\n"));
return;
}
LWIP_ASSERT("check that first pbuf can hold icmp message",
(q->len >= (8 + IP_HLEN + 8)));
(q->len >= (sizeof(struct icmp_dur_hdr) + IP_HLEN + ICMP_DEST_UNREACH_DATASIZE)));
iphdr = p->payload;
@ -241,7 +244,8 @@ icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
ICMPH_TYPE_SET(idur, ICMP_DUR);
ICMPH_CODE_SET(idur, t);
SMEMCPY((u8_t *)q->payload + 8, p->payload, IP_HLEN + 8);
SMEMCPY((u8_t *)q->payload + sizeof(struct icmp_dur_hdr), p->payload,
IP_HLEN + ICMP_DEST_UNREACH_DATASIZE);
/* calculate checksum */
idur->chksum = 0;
@ -271,15 +275,15 @@ icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
struct ip_hdr *iphdr;
struct icmp_te_hdr *tehdr;
/* @todo: can this be PBUF_LINK instead of PBUF_IP? */
q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM);
/* ICMP header + IP header + 8 bytes of data */
q = pbuf_alloc(PBUF_IP, sizeof(struct icmp_dur_hdr) + IP_HLEN + ICMP_DEST_UNREACH_DATASIZE,
PBUF_RAM);
if (q == NULL) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded: failed to allocate pbuf for ICMP packet.\n"));
return;
}
LWIP_ASSERT("check that first pbuf can hold icmp message",
(q->len >= (8 + IP_HLEN + 8)));
(q->len >= (sizeof(struct icmp_dur_hdr) + IP_HLEN + ICMP_DEST_UNREACH_DATASIZE)));
iphdr = p->payload;
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded from "));
@ -293,7 +297,8 @@ icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
ICMPH_CODE_SET(tehdr, t);
/* copy fields from original packet */
SMEMCPY((u8_t *)q->payload + 8, (u8_t *)p->payload, IP_HLEN + 8);
SMEMCPY((u8_t *)q->payload + sizeof(struct icmp_dur_hdr), (u8_t *)p->payload,
IP_HLEN + ICMP_DEST_UNREACH_DATASIZE);
/* calculate checksum */
tehdr->chksum = 0;