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PPP, PPPoS: only reserve header space for IPv4 and IPv6 packets if IP forwarding is enabled

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We only have to reserve header space for forwarding for IPv4 and IPv6
packets, all other packets are PPP control packets. Doing so reduce
the need of having to coalesce the PBUF chain before PPP processes
control packets.
This commit is contained in:
Sylvain Rochet 2020-10-20 03:17:53 +02:00
parent e801307738
commit 6584002826
1 changed files with 18 additions and 2 deletions
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20
src/netif/ppp/pppos.c
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@ -561,7 +561,16 @@ pppos_input(ppp_pcb *ppp, u8_t *s, int l)
pppos->in_tail = NULL;
#if IP_FORWARD || LWIP_IPV6_FORWARD
/* hide the room for Ethernet forwarding header */
pbuf_remove_header(inp, PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN);
if (0
#if PPP_IPV4_SUPPORT
|| pppos->in_protocol == PPP_IP
#endif /* PPP_IPV4_SUPPORT */
#if PPP_IPV6_SUPPORT
|| pppos->in_protocol == PPP_IPV6
#endif /* PPP_IPV6_SUPPORT */
) {
pbuf_remove_header(inp, PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN);
}
#endif /* IP_FORWARD || LWIP_IPV6_FORWARD */
#if PPP_INPROC_IRQ_SAFE
if(tcpip_try_callback(pppos_input_callback, inp) != ERR_OK) {
@ -670,7 +679,14 @@ pppos_input(ppp_pcb *ppp, u8_t *s, int l)
* + PBUF_LINK_HLEN bytes so the packet is being allocated with enough header
* space to be forwarded (to Ethernet for example).
*/
if (pppos->in_head == NULL) {
if (pppos->in_head == NULL && (0
#if PPP_IPV4_SUPPORT
|| pppos->in_protocol == PPP_IP
#endif /* PPP_IPV4_SUPPORT */
#if PPP_IPV6_SUPPORT
|| pppos->in_protocol == PPP_IPV6
#endif /* PPP_IPV6_SUPPORT */
)) {
pbuf_alloc_len = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN;
}
#endif /* IP_FORWARD || LWIP_IPV6_FORWARD */