void ci_ip_send_pkt_lookup(ci_netif* ni,
const struct oo_sock_cplane* sock_cp_opt,
ci_ip_pkt_fmt* pkt,
ci_ip_cached_hdrs* ipcache)
{
ci_ip4_hdr* pkt_ip = oo_tx_ip_hdr(pkt);
struct oo_sock_cplane sock_cp;
ci_assert(pkt_ip->ip_saddr_be32 != 0);
ci_assert(pkt_ip->ip_daddr_be32 != 0);
if( sock_cp_opt != NULL )
sock_cp = *sock_cp_opt;
else
oo_sock_cplane_init(&sock_cp);
ci_ip_cache_init(ipcache);
sock_cp.ip_laddr_be32 = pkt_ip->ip_saddr_be32;
ipcache->ip.ip_daddr_be32 = pkt_ip->ip_daddr_be32;
switch( pkt_ip->ip_protocol ) {
case IPPROTO_UDP:
case IPPROTO_TCP:
sock_cp.lport_be16 = TX_PKT_SPORT_BE16(pkt);
ipcache->dport_be16 = TX_PKT_DPORT_BE16(pkt);
break;
default:
sock_cp.lport_be16 = 0;
ipcache->dport_be16 = 0;
break;
}
cicp_user_retrieve(ni, ipcache, &sock_cp);
}
int onload_zc_alloc_buffers(int fd, struct onload_zc_iovec* iovecs,
int iovecs_len,
enum onload_zc_buffer_type_flags flags)
{
int rc = 0, i;
citp_lib_context_t lib_context;
citp_fdinfo* fdi;
citp_sock_fdi* epi;
ci_netif* ni;
ci_ip_pkt_fmt *pkt;
unsigned max_len;
Log_CALL(ci_log("%s(%d, %p, %d, %x)", __FUNCTION__, fd, iovecs,
iovecs_len, flags));
citp_enter_lib(&lib_context);
if( (fdi = citp_fdtable_lookup(fd)) != NULL ) {
switch( citp_fdinfo_get_type(fdi) ) {
case CITP_UDP_SOCKET:
case CITP_TCP_SOCKET:
epi = fdi_to_sock_fdi(fdi);
ni = epi->sock.netif;
ci_netif_lock(ni);
for( i = 0; i < iovecs_len; ++i ) {
max_len = CI_CFG_PKT_BUF_SIZE;
pkt = ci_netif_pkt_tx_tcp_alloc(ni);
if( pkt == NULL ) {
while( --i >= 0 )
ci_netif_pkt_release(ni, (ci_ip_pkt_fmt*)iovecs[i].buf);
rc = -ENOMEM;
ci_netif_unlock(ni);
goto out;
}
/* Make sure this is clear as it affects behaviour when freeing */
pkt->pf.udp.rx_flags = 0;
iovecs[i].buf = (struct oo_zc_buf *)pkt;
if( flags & ONLOAD_ZC_BUFFER_HDR_TCP ) {
if( (citp_fdinfo_get_type(fdi) == CITP_TCP_SOCKET) &&
(epi->sock.s->b.state & CI_TCP_STATE_TCP_CONN) ) {
ci_tcp_state* ts = SOCK_TO_TCP(epi->sock.s);
oo_tx_pkt_layout_init(pkt);
iovecs[i].iov_base = ((char *)oo_tx_ip_hdr(pkt)) +
ts->outgoing_hdrs_len;
max_len = tcp_eff_mss(ts);
}
else {
/* Best guess. We can fix it up later. Magic 12 leaves
* space for time stamp option (common case)
*/
oo_tx_pkt_layout_init(pkt);
iovecs[i].iov_base =
(uint8_t*) oo_tx_ip_data(pkt) + sizeof(ci_tcp_hdr) + 12;
}
}
else if( flags & ONLOAD_ZC_BUFFER_HDR_UDP ) {
oo_tx_pkt_layout_init(pkt);
iovecs[i].iov_base =
(uint8_t*) oo_tx_ip_data(pkt) + sizeof(ci_udp_hdr);
}
else
iovecs[i].iov_base = PKT_START(pkt);
iovecs[i].iov_len = CI_CFG_PKT_BUF_SIZE -
((char *)iovecs[i].iov_base - (char *)pkt);
if( iovecs[i].iov_len > max_len )
iovecs[i].iov_len = max_len;
}
ni->state->n_async_pkts += iovecs_len;
ci_netif_unlock(ni);
break;
#if CI_CFG_USERSPACE_EPOLL
case CITP_EPOLL_FD:
rc = -ENOTSOCK;
break;
#endif
#if CI_CFG_USERSPACE_PIPE
case CITP_PIPE_FD:
rc = -ENOTSOCK;
break;
#endif
case CITP_PASSTHROUGH_FD:
rc = -ESOCKTNOSUPPORT;
break;
default:
LOG_U(log("%s: unknown fdinfo type %d", __FUNCTION__,
citp_fdinfo_get_type(fdi)));
rc = -EINVAL;
}
citp_fdinfo_release_ref(fdi, 0);
}
else {
/* Not onload socket */
rc = -ESOCKTNOSUPPORT;
}
out:
citp_exit_lib(&lib_context, TRUE);
Log_CALL_RESULT(rc);
return rc;
}