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Fix bug #48963: ip6_frag does not support LWIP_NETIF_TX_SINGLE_PBUF

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Implemented.
This commit is contained in:
Dirk Ziegelmeier 2016-12-09 21:26:21 +01:00
parent 8347d3b623
commit 26e02e84a6
1 changed files with 27 additions and 2 deletions
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29
src/core/ipv6/ip6_frag.c
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@ -610,6 +610,7 @@ nullreturn:
#if LWIP_IPV6 && LWIP_IPV6_FRAG
#if !LWIP_NETIF_TX_SINGLE_PBUF
/** Allocate a new struct pbuf_custom_ref */
static struct pbuf_custom_ref*
ip6_frag_alloc_pbuf_custom_ref(void)
@ -638,6 +639,7 @@ ip6_frag_free_pbuf_custom(struct pbuf *p)
}
ip6_frag_free_pbuf_custom_ref(pcr);
}
#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */
/**
* Fragment an IPv6 datagram if too large for the netif or path MTU.
@ -658,7 +660,11 @@ ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest)
struct ip6_hdr *ip6hdr;
struct ip6_frag_hdr *frag_hdr;
struct pbuf *rambuf;
#if !LWIP_NETIF_TX_SINGLE_PBUF
struct pbuf *newpbuf;
u16_t newpbuflen = 0;
u16_t left_to_copy;
#endif
static u32_t identification;
u16_t nfb;
u16_t left, cop;
@ -666,8 +672,6 @@ ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest)
u16_t fragment_offset = 0;
u16_t last;
u16_t poff = IP6_HLEN;
u16_t newpbuflen = 0;
u16_t left_to_copy;
identification++;
@ -686,6 +690,26 @@ ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest)
/* Fill this fragment */
cop = last ? left : nfb;
#if LWIP_NETIF_TX_SINGLE_PBUF
rambuf = pbuf_alloc(PBUF_IP, cop + IP6_FRAG_HLEN, PBUF_RAM);
if (rambuf == NULL) {
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(rambuf->len == rambuf->tot_len) && (rambuf->next == NULL));
poff += pbuf_copy_partial(p, (u8_t*)rambuf->payload + IP6_FRAG_HLEN, cop, poff);
/* make room for the IP header */
if (pbuf_header(rambuf, IP6_HLEN)) {
pbuf_free(rambuf);
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
/* fill in the IP header */
SMEMCPY(rambuf->payload, original_ip6hdr, IP6_HLEN);
ip6hdr = (struct ip6_hdr *)rambuf->payload;
frag_hdr = (struct ip6_frag_hdr *)((u8_t*)rambuf->payload + IP6_HLEN);
#else
/* When not using a static buffer, create a chain of pbufs.
* The first will be a PBUF_RAM holding the link, IPv6, and Fragment header.
* The rest will be PBUF_REFs mirroring the pbuf chain to be fragged,
@ -744,6 +768,7 @@ ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest)
}
}
poff = newpbuflen;
#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
/* Set headers */
frag_hdr->_nexth = original_ip6hdr->_nexth;