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PPP, PPPoS: use PBUF_RAM in transmit pathway

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Allocate Tx chunk in PBUF_RAM, using PBUF_POOL_BUFSIZE as a great
chosen value for chunk size.
This commit is contained in:
Sylvain Rochet 2020-10-18 01:44:09 +02:00
parent 3779cf7856
commit 7c0c3879b2
1 changed files with 10 additions and 8 deletions
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18
src/netif/ppp/pppos.c
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@ -207,10 +207,9 @@ pppos_write(ppp_pcb *ppp, void *ctx, struct pbuf *p)
err_t err; err_t err;
LWIP_UNUSED_ARG(ppp); LWIP_UNUSED_ARG(ppp);
/* Grab an output buffer. Using PBUF_POOL here for tx is ok since the pbuf /* Grab an output buffer. Assume PBUF_POOL_BUFSIZE is an acceptable
gets freed by 'pppos_output_last' before this function returns and thus * chunk size for Tx as well. */
cannot starve rx. */ nb = pbuf_alloc(PBUF_RAW, PBUF_POOL_BUFSIZE, PBUF_RAM);
nb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (nb == NULL) { if (nb == NULL) {
PPPDEBUG(LOG_WARNING, ("pppos_write[%d]: alloc fail\n", ppp->netif->num)); PPPDEBUG(LOG_WARNING, ("pppos_write[%d]: alloc fail\n", ppp->netif->num));
LINK_STATS_INC(link.memerr); LINK_STATS_INC(link.memerr);
@ -220,6 +219,8 @@ pppos_write(ppp_pcb *ppp, void *ctx, struct pbuf *p)
return ERR_MEM; return ERR_MEM;
} }
/* Empty the buffer */
nb->len = 0;
/* Set nb->tot_len to actual payload length */ /* Set nb->tot_len to actual payload length */
nb->tot_len = p->len; nb->tot_len = p->len;
@ -258,10 +259,9 @@ pppos_netif_output(ppp_pcb *ppp, void *ctx, struct pbuf *pb, u16_t protocol)
err_t err; err_t err;
LWIP_UNUSED_ARG(ppp); LWIP_UNUSED_ARG(ppp);
/* Grab an output buffer. Using PBUF_POOL here for tx is ok since the pbuf /* Grab an output buffer. Assume PBUF_POOL_BUFSIZE is an acceptable
gets freed by 'pppos_output_last' before this function returns and thus * chunk size for Tx as well. */
cannot starve rx. */ nb = pbuf_alloc(PBUF_RAW, PBUF_POOL_BUFSIZE, PBUF_RAM);
nb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (nb == NULL) { if (nb == NULL) {
PPPDEBUG(LOG_WARNING, ("pppos_netif_output[%d]: alloc fail\n", ppp->netif->num)); PPPDEBUG(LOG_WARNING, ("pppos_netif_output[%d]: alloc fail\n", ppp->netif->num));
LINK_STATS_INC(link.memerr); LINK_STATS_INC(link.memerr);
@ -270,6 +270,8 @@ pppos_netif_output(ppp_pcb *ppp, void *ctx, struct pbuf *pb, u16_t protocol)
return ERR_MEM; return ERR_MEM;
} }
/* Empty the buffer */
nb->len = 0;
/* Set nb->tot_len to actual payload length */ /* Set nb->tot_len to actual payload length */
nb->tot_len = pb->tot_len; nb->tot_len = pb->tot_len;