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lwip: revise ooseq handling.

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Modified for lwip backwards compatibility based on upstream feedback.
This commit is contained in:
Our Air Quality 2017-09-08 10:48:44 +10:00
parent 893f715852
commit 0a1fd09459
4 changed files with 59 additions and 16 deletions
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23
lwip/esp_interface.c
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@ -47,6 +47,7 @@
#include <lwip/snmp.h>
#include "lwip/ip.h"
#include "lwip/ethip6.h"
#include "lwip/priv/tcp_priv.h"
#include "netif/etharp.h"
#include "sysparam.h"
#include "netif/ppp/pppoe.h"
@ -143,7 +144,7 @@ low_level_output(struct netif *netif, struct pbuf *p)
* Keep account of the number the PP RX pool buffers being used in lwip,
* to help make decision about the number of OOSEQ buffers to maintain etc.
*/
uint32_t pp_rx_pool_usage;
volatile uint32_t pp_rx_pool_usage;
/* Support for recycling a pbuf from the sdk rx pool, and accounting for the
* number of these used in lwip. */
@ -165,11 +166,17 @@ void pp_recycle_rx_pbuf(struct pbuf *p)
/* Return the number of ooseq bytes that can be retained given the current
* size 'n'. */
size_t ooseq_max_bytes(size_t n)
size_t ooseq_bytes_limit(struct tcp_seg *ooseq)
{
#if COPY_PP_RX_PBUFS
size_t ooseq_blen = 0;
for (; ooseq != NULL; ooseq = ooseq->next) {
struct pbuf *p = ooseq->p;
ooseq_blen += p->tot_len;
}
size_t free = xPortGetFreeHeapSize();
ssize_t target = ((ssize_t)free - 8000) + n;
ssize_t target = ((ssize_t)free - 8000) + ooseq_blen;
if (target < 0) {
target = 0;
@ -185,8 +192,14 @@ size_t ooseq_max_bytes(size_t n)
/* Return the number of ooseq pbufs that can be retained given the current
* size 'n'. */
size_t ooseq_max_pbufs(size_t n)
size_t ooseq_pbufs_limit(struct tcp_seg *ooseq)
{
size_t ooseq_qlen = 0;
for (; ooseq != NULL; ooseq = ooseq->next) {
struct pbuf *p = ooseq->p;
ooseq_qlen += pbuf_clen(p);
}
#if COPY_PP_RX_PBUFS
/* More likely memory limited, but set some limit. */
ssize_t limit = 10;
@ -196,7 +209,7 @@ size_t ooseq_max_pbufs(size_t n)
#endif
size_t usage = pp_rx_pool_usage;
ssize_t target = limit - ((ssize_t)usage - n);
ssize_t target = limit - ((ssize_t)usage - ooseq_qlen);
if (target < 0) {
target = 0;