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Added the option PBUF_LINK_ENCAPSULATION_HLEN to allocate additional header space for TX on netifs requiring additional headers

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This commit is contained in:
sg 2015-02-13 21:42:04 +01:00
parent e3e3200f95
commit 6ef7563f53
5 changed files with 23 additions and 5 deletions
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4
CHANGELOG
View File

@ -6,6 +6,10 @@ HISTORY
++ New features:
2015-02-13: Simon Goldschmidt
* opt.h, pbuf.h/.c, etharp.c: Added the option PBUF_LINK_ENCAPSULATION_HLEN to
allocate additional header space for TX on netifs requiring additional headers
2015-02-12: chrysn
* timers.h/.c: introduce sys_timeouts_sleeptime (returns the time left before
the next timeout is due, for NO_SYS==1)

11
src/core/pbuf.c
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@ -214,17 +214,22 @@ pbuf_alloc(pbuf_layer layer, u16_t length, pbuf_type type)
switch (layer) {
case PBUF_TRANSPORT:
/* add room for transport (often TCP) layer header */
offset = PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN;
offset = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN;
break;
case PBUF_IP:
/* add room for IP layer header */
offset = PBUF_LINK_HLEN + PBUF_IP_HLEN;
offset = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN;
break;
case PBUF_LINK:
/* add room for link layer header */
offset = PBUF_LINK_HLEN;
offset = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN;
break;
case PBUF_RAW_TX:
/* add room for encapsulating link layer headers (e.g. 802.11) */
offset = PBUF_LINK_ENCAPSULATION_HLEN;
break;
case PBUF_RAW:
/* no offset (e.g. RX buffers or chain successors) */
offset = 0;
break;
default:

8
src/include/lwip/opt.h
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@ -1189,6 +1189,14 @@
#endif /* LWIP_HOOK_VLAN_SET */
#endif
/**
* PBUF_LINK_ENCAPSULATION_HLEN: the number of bytes that should be allocated
* for an additional encapsulation header before ethernet headers (e.g. 802.11)
*/
#ifndef PBUF_LINK_ENCAPSULATION_HLEN
#define PBUF_LINK_ENCAPSULATION_HLEN 0
#endif
/**
* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. The default is
* designed to accommodate single full size TCP frame in one pbuf, including

1
src/include/lwip/pbuf.h
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@ -60,6 +60,7 @@ typedef enum {
PBUF_TRANSPORT,
PBUF_IP,
PBUF_LINK,
PBUF_RAW_TX,
PBUF_RAW
} pbuf_layer;

4
src/netif/etharp.c
View File

@ -1128,7 +1128,7 @@ etharp_query(struct netif *netif, ip_addr_t *ipaddr, struct pbuf *q)
}
if(copy_needed) {
/* copy the whole packet into new pbufs */
p = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
p = pbuf_alloc(PBUF_RAW_TX, p->tot_len, PBUF_RAM);
if(p != NULL) {
if (pbuf_copy(p, q) != ERR_OK) {
pbuf_free(p);
@ -1240,7 +1240,7 @@ etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr,
LWIP_ASSERT("netif != NULL", netif != NULL);
/* allocate a pbuf for the outgoing ARP request packet */
p = pbuf_alloc(PBUF_RAW, SIZEOF_ETHARP_PACKET_TX, PBUF_RAM);
p = pbuf_alloc(PBUF_RAW_TX, SIZEOF_ETHARP_PACKET_TX, PBUF_RAM);
/* could allocate a pbuf for an ARP request? */
if (p == NULL) {
LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS,