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Simplify pbuf allocation for TCP packets in two places by replacing pbuf_alloc + pbuf_header

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with an equivalent pbuf_alloc.When we know we'll have to adjust the payload for the TCP header
just alloc it like that from the start.
This commit is contained in:
jani 2002-12-19 09:50:53 +00:00
parent 156d2c866f
commit f946abd86b
1 changed files with 2 additions and 21 deletions
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23
src/core/tcp_out.c
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@ -344,21 +344,12 @@ tcp_output(struct tcp_pcb *pcb)
(seg == NULL ||
ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len > wnd)) {
pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW);
p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_RAM);
p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM);
if(p == NULL) {
DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: (ACK) could not allocate pbuf\n"));
return ERR_BUF;
}
DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: sending ACK for %lu\n", pcb->rcv_nxt));
if(pbuf_header(p, TCP_HLEN)) {
DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: (ACK) no room for TCP header in pbuf.\n"));
#ifdef TCP_STATS
++lwip_stats.tcp.err;
#endif /* TCP_STATS */
pbuf_free(p);
return ERR_BUF;
}
tcphdr = p->payload;
tcphdr->src = htons(pcb->local_port);
@ -509,20 +500,10 @@ tcp_rst(u32_t seqno, u32_t ackno,
{
struct pbuf *p;
struct tcp_hdr *tcphdr;
p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_RAM);
p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM);
if(p == NULL) {
if(p == NULL) {
DEBUGF(TCP_DEBUG, ("tcp_rst: could not allocate memory for pbuf\n"));
return;
}
}
if(pbuf_header(p, TCP_HLEN)) {
DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_rst: no room for TCP header in pbuf.\n"));
#ifdef TCP_STATS
++lwip_stats.tcp.err;
#endif /* TCP_STATS */
return;
}
tcphdr = p->payload;