/**
* Put an IP_RECVTTL control message into msg ancillary data buffer.
*/
ci_inline void ip_cmsg_recv_ttl(const ci_ip_pkt_fmt *pkt,
struct cmsg_state *cmsg_state)
{
int ttl = oo_ip_hdr_const(pkt)->ip_ttl;
ci_put_cmsg(cmsg_state, IPPROTO_IP, IP_TTL, sizeof(ttl), &ttl);
}
/**
* Put an IP_RECVTOS control message into msg ancillary data buffer.
*/
ci_inline void ip_cmsg_recv_tos(const ci_ip_pkt_fmt *pkt,
struct cmsg_state *cmsg_state)
{
int tos = oo_ip_hdr_const(pkt)->ip_tos;
ci_put_cmsg(cmsg_state, IPPROTO_IP, IP_TOS, sizeof(tos), &tos);
}
ci_inline void ci_udp_recvmsg_fill_msghdr(ci_netif* ni, ci_msghdr* msg,
const ci_ip_pkt_fmt* pkt,
ci_sock_cmn* s)
{
#ifndef __KERNEL__
const ci_udp_hdr* udp;
const ci_ip4_hdr* ip;
if( msg != NULL ) {
if( msg->msg_name != NULL ) {
if( pkt->flags & CI_PKT_FLAG_RX_INDIRECT )
pkt = PKT_CHK_NNL(ni, pkt->frag_next);
ip = oo_ip_hdr_const(pkt);
udp = (const ci_udp_hdr*) ((char*) ip + CI_IP4_IHL(ip));
ci_addr_to_user(CI_SA(msg->msg_name), &msg->msg_namelen,
s->domain, udp->udp_source_be16, ip->ip_saddr_be32);
}
}
#endif
}
/**
* Put an IP_PKTINFO control message into msg ancillary data buffer.
*/
static void ip_cmsg_recv_pktinfo(ci_netif* netif, const ci_ip_pkt_fmt* pkt,
struct cmsg_state *cmsg_state)
{
/* TODO: This is horribly inefficient -- two system calls. Could be made
* cheap with a user-level llap table.
*/
struct in_pktinfo info;
ci_uint32 addr;
int hwport;
addr = oo_ip_hdr_const(pkt)->ip_daddr_be32;
info.ipi_addr.s_addr = addr;
/* Set the ifindex the pkt was received at. */
{
ci_ifid_t ifindex = 0;
int rc = 0;
hwport = netif->state->intf_i_to_hwport[pkt->intf_i];
rc = cicp_llap_find(CICP_HANDLE(netif), &ifindex,
CI_HWPORT_ID(hwport), pkt->vlan);
if( rc != 0 )
LOG_E(ci_log("%s: cicp_llap_find(intf_i=%d, hwport=%d) failed rc=%d",
__FUNCTION__, pkt->intf_i, hwport, rc));
info.ipi_ifindex = ifindex;
}
/* RFC1122: The specific-destination address is defined to be the
* destination address in the IP header unless the header contains a
* broadcast or multicast address, in which case the specific-destination
* is an IP address assigned to the physical interface on which the
* datagram arrived. */
/*\ FIXME: we should drop the packet if this call fails */
cicp_ipif_pktinfo_query(CICP_HANDLE(netif), netif, OO_PKT_P(pkt),
info.ipi_ifindex,
&info.ipi_spec_dst.s_addr
);
ci_put_cmsg(cmsg_state, IPPROTO_IP, IP_PKTINFO, sizeof(info), &info);
}
