/*----------------------------------------------------------------------------*/
int
mtcp_init_rss(mctx_t mctx, in_addr_t saddr_base, int num_addr,
in_addr_t daddr, in_addr_t dport)
{
mtcp_manager_t mtcp;
addr_pool_t ap;
mtcp = GetMTCPManager(mctx);
if (!mtcp) {
return -1;
}
if (saddr_base == INADDR_ANY) {
int nif_out;
/* for the INADDR_ANY, find the output interface for the destination
and set the saddr_base as the ip address of the output interface */
nif_out = GetOutputInterface(daddr);
saddr_base = CONFIG.eths[nif_out].ip_addr;
}
ap = CreateAddressPoolPerCore(mctx->cpu, num_cpus,
saddr_base, num_addr, daddr, dport);
if (!ap) {
errno = ENOMEM;
return -1;
}
mtcp->ap = ap;
return 0;
}
/*----------------------------------------------------------------------------*/
uint8_t *
IPOutput(struct mtcp_manager *mtcp, tcp_stream *stream, uint16_t tcplen)
{
struct iphdr *iph;
int nif;
unsigned char *haddr;
if (stream->sndvar->nif_out >= 0) {
nif = stream->sndvar->nif_out;
} else {
nif = GetOutputInterface(stream->daddr);
stream->sndvar->nif_out = nif;
}
haddr = GetDestinationHWaddr(stream->daddr);
if (!haddr) {
#if 0
uint8_t *da = (uint8_t *)&stream->daddr;
TRACE_INFO("[WARNING] The destination IP %u.%u.%u.%u "
"is not in ARP table!\n",
da[0], da[1], da[2], da[3]);
#endif
/* if not found in the arp table, send arp request and return NULL */
/* tcp will retry sending the packet later */
RequestARP(mtcp, stream->daddr, stream->sndvar->nif_out, mtcp->cur_ts);
return NULL;
}
iph = (struct iphdr *)EthernetOutput(mtcp, ETH_P_IP,
stream->sndvar->nif_out, haddr, tcplen + IP_HEADER_LEN);
if (!iph) {
return NULL;
}
iph->ihl = IP_HEADER_LEN >> 2;
iph->version = 4;
iph->tos = 0;
iph->tot_len = htons(IP_HEADER_LEN + tcplen);
iph->id = htons(stream->sndvar->ip_id++);
iph->frag_off = htons(0x4000); // no fragmentation
iph->ttl = 64;
iph->protocol = IPPROTO_TCP;
iph->saddr = stream->saddr;
iph->daddr = stream->daddr;
iph->check = 0;
iph->check = ip_fast_csum(iph, iph->ihl);
return (uint8_t *)(iph + 1);
}
/*----------------------------------------------------------------------------*/
uint8_t *
IPOutputStandalone(struct mtcp_manager *mtcp,
uint16_t ip_id, uint32_t saddr, uint32_t daddr, uint16_t tcplen)
{
struct iphdr *iph;
int nif;
unsigned char * haddr;
nif = GetOutputInterface(daddr);
if (nif < 0)
return NULL;
haddr = GetDestinationHWaddr(daddr);
if (!haddr) {
#if 0
uint8_t *da = (uint8_t *)&daddr;
TRACE_INFO("[WARNING] The destination IP %u.%u.%u.%u "
"is not in ARP table!\n",
da[0], da[1], da[2], da[3]);
#endif
RequestARP(mtcp, daddr, nif, mtcp->cur_ts);
return NULL;
}
iph = (struct iphdr *)EthernetOutput(mtcp,
ETH_P_IP, nif, haddr, tcplen + IP_HEADER_LEN);
if (!iph) {
return NULL;
}
iph->ihl = IP_HEADER_LEN >> 2;
iph->version = 4;
iph->tos = 0;
iph->tot_len = htons(IP_HEADER_LEN + tcplen);
iph->id = htons(ip_id);
iph->frag_off = htons(0x4000); // no fragmentation
iph->ttl = 64;
iph->protocol = IPPROTO_TCP;
iph->saddr = saddr;
iph->daddr = daddr;
iph->check = 0;
iph->check = ip_fast_csum(iph, iph->ihl);
return (uint8_t *)(iph + 1);
}
