/*-----------------------------------------------------------------------------------*/
void *
mem_malloc2(mem_size_t size)
{
void *mem;
mem = mem_malloc(size);
#if MEM_RECLAIM
if(mem == NULL) {
mem_reclaim(size);
mem = mem_malloc(size);
}
#endif /* MEM_RECLAIM */
return mem;
}
/*-----------------------------------------------------------------------------------*/
void
tcp_rst(u32_t seqno, u32_t ackno,
struct ip_addr *local_ip, struct ip_addr *remote_ip,
u16_t local_port, u16_t remote_port)
{
struct pbuf *p;
struct tcp_hdr *tcphdr;
p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_RAM);
if(p == NULL) {
#if MEM_RECLAIM
mem_reclaim(sizeof(struct pbuf));
p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_RAM);
#endif /* MEM_RECLAIM */
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_send_data: no room for TCP header in pbuf.\n"));
#ifdef TCP_STATS
++stats.tcp.err;
#endif /* TCP_STATS */
return;
}
tcphdr = p->payload;
tcphdr->src = htons(local_port);
tcphdr->dest = htons(remote_port);
tcphdr->seqno = htonl(seqno);
tcphdr->ackno = htonl(ackno);
TCPH_FLAGS_SET(tcphdr, TCP_RST | TCP_ACK);
tcphdr->wnd = 0;
tcphdr->urgp = 0;
TCPH_OFFSET_SET(tcphdr, 5 << 4);
tcphdr->chksum = 0;
#if CHECKSUM_GEN_TCP
tcphdr->chksum = inet_chksum_pseudo(p, local_ip, remote_ip,
IP_PROTO_TCP, p->tot_len);
#endif
#ifdef TCP_STATS
++stats.tcp.xmit;
#endif /* TCP_STATS */
ip_output(p, local_ip, remote_ip, TCP_TTL, IP_PROTO_TCP);
pbuf_free(p);
DEBUGF(TCP_RST_DEBUG, ("tcp_rst: seqno %lu ackno %lu.\n", seqno, ackno));
}
