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Added ip_frag_init() and some LWIP_DEBUGFs.

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This commit is contained in:
christiaans 2006-07-04 08:24:17 +00:00
parent dd060ceed3
commit a5cab96ff3
1 changed files with 30 additions and 15 deletions
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45
src/core/ipv4/ip_frag.c
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@ -40,12 +40,24 @@
#include <string.h>
#include "lwip/opt.h"
/* #include "lwip/sys.h" */
#include "lwip/ip.h"
#include "lwip/ip_frag.h"
#include "lwip/netif.h"
#include "lwip/stats.h"
#define IP_REASS_BUFSIZE 5760
#define IP_REASS_MAXAGE 3
static u8_t ip_reassbuf[IP_HLEN + IP_REASS_BUFSIZE];
static u8_t ip_reassbitmap[IP_REASS_BUFSIZE / (8 * 8) + 1];
static const u8_t bitmap_bits[8] = { 0xff, 0x7f, 0x3f, 0x1f,
0x0f, 0x07, 0x03, 0x01
};
static u16_t ip_reasslen;
static u8_t ip_reassflags;
#define IP_REASS_FLAG_LASTFRAG 0x01
static u8_t ip_reasstmr;
/*
* Copy len bytes from offset in pbuf to buffer
@ -73,20 +85,18 @@ copy_from_pbuf(struct pbuf *p, u16_t * offset,
return p;
}
#define IP_REASS_BUFSIZE 5760
#define IP_REASS_MAXAGE 30
#define IP_REASS_TMO 1000
static u8_t ip_reassbuf[IP_HLEN + IP_REASS_BUFSIZE];
static u8_t ip_reassbitmap[IP_REASS_BUFSIZE / (8 * 8) + 1];
static const u8_t bitmap_bits[8] = { 0xff, 0x7f, 0x3f, 0x1f,
0x0f, 0x07, 0x03, 0x01
};
static u16_t ip_reasslen;
static u8_t ip_reassflags;
#define IP_REASS_FLAG_LASTFRAG 0x01
static u8_t ip_reasstmr;
/**
* Initializes IP reassembly and fragmentation states.
*/
void
ip_frag_init(void)
{
ip_reasstmr = 0;
ip_reassflags = 0;
ip_reasslen = 0;
memset(ip_reassbitmap, 0, sizeof(ip_reassbitmap));
}
/**
* Reassembly timer base function
@ -99,6 +109,7 @@ ip_reass_tmr(void)
{
if (ip_reasstmr > 0) {
ip_reasstmr--;
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer dec %"U16_F"\n",(u16_t)ip_reasstmr));
}
}
@ -148,7 +159,7 @@ ip_reass(struct pbuf *p)
/* If the offset or the offset + fragment length overflows the
reassembly buffer, we discard the entire packet. */
if (offset > IP_REASS_BUFSIZE || offset + len > IP_REASS_BUFSIZE) {
if ((offset > IP_REASS_BUFSIZE) || ((offset + len) > IP_REASS_BUFSIZE)) {
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: fragment outside of buffer (%"S16_F":%"S16_F"/%"S16_F").\n", offset,
offset + len, IP_REASS_BUFSIZE));
@ -266,6 +277,8 @@ ip_reass(struct pbuf *p)
}
IPFRAG_STATS_INC(ip_frag.fw);
} else {
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: pbuf_alloc(PBUF_LINK, ip_reasslen=%"U16_F", PBUF_POOL) failed\n", ip_reasslen));
IPFRAG_STATS_INC(ip_frag.memerr);
}
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass: p %p\n", (void*)p));
@ -305,6 +318,7 @@ ip_frag(struct pbuf *p, struct netif *netif, struct ip_addr *dest)
/* Get a RAM based MTU sized pbuf */
rambuf = pbuf_alloc(PBUF_LINK, 0, PBUF_REF);
if (rambuf == NULL) {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_frag: pbuf_alloc(PBUF_LINK, 0, PBUF_REF) failed\n"));
return ERR_MEM;
}
rambuf->tot_len = rambuf->len = mtu;
@ -356,6 +370,7 @@ ip_frag(struct pbuf *p, struct netif *netif, struct ip_addr *dest)
IPFRAG_STATS_INC(ip_frag.xmit);
pbuf_free(header);
} else {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_frag: pbuf_alloc() for header failed\n"));
pbuf_free(rambuf);
return ERR_MEM;
}