bool WSocket::tcpRecvAll(SOCKET s, void *buf, int bufSize, DWORD timeout)
{
int len;
do
{
if((len = tcpRecv(s, buf, bufSize, timeout)) <= 0)return false;
buf = ((LPBYTE)buf) + len;
bufSize -= len;
}
while(bufSize > 0);
return (bufSize == 0);
}
/**
* Process an incoming IPv4 packet.
* @param pkt pointer to the incoming packet
* @return OK if packet was processed succesfully, otherwise SYSERR
*/
syscall ipv4Recv(struct packet *pkt)
{
struct ipv4Pkt *ip;
struct netaddr dst;
struct netaddr src;
ushort iplen;
/* Error check pointers */
if (NULL == pkt)
{
return SYSERR;
}
/* Setup pointer to IPv4 header */
pkt->nethdr = pkt->curr;
ip = (struct ipv4Pkt *)pkt->curr;
/* Verify the IP packet is valid */
if (FALSE == ipv4RecvValid(ip))
{
IPv4_TRACE("Invalid packet");
netFreebuf(pkt);
return SYSERR;
}
/* Obtain destination and source IP addresses */
dst.type = NETADDR_IPv4;
dst.len = IPv4_ADDR_LEN;
memcpy(dst.addr, ip->dst, dst.len);
src.type = NETADDR_IPv4;
src.len = IPv4_ADDR_LEN;
memcpy(src.addr, ip->src, src.len);
/* If packet is not destined for one of our network interfaces,
* then attempt to route the packet */
if (FALSE == ipv4RecvDemux(&dst))
{
IPv4_TRACE("Packet sent to routing subsystem");
#if NETEMU
/* Run the packet through the network emulator if enabled */
return netemu(pkt);
#else
return rtRecv(pkt);
#endif
}
/* Check if packet is fragmented */
if ((IPv4_FLAG_MF & net2hs(ip->flags_froff))
|| (0 != (net2hs(ip->flags_froff) & IPv4_FROFF)))
{
// TODO: Handle fragmenting of packet
// TODO: Should send icmp time exceeded
// return ipRecvSendFrag(pkt, &dst);
IPv4_TRACE("Packet fragmented");
netFreebuf(pkt);
return SYSERR;
}
/* The Ethernet driver pads packets less than 60 bytes in length.
* If the packet length returned from the Ethernet driver (pkt->len)
* does not agree with the packet headers, adjust the packet length
* to remove padding. */
iplen = net2hs(ip->len);
if ((pkt->len - pkt->nif->linkhdrlen) > iplen)
{
pkt->len = pkt->nif->linkhdrlen + iplen;
}
/* Move current pointer to application level header */
pkt->curr += ((ip->ver_ihl & IPv4_IHL) << 2);
IPv4_TRACE("IPv4 proto %d", ip->proto);
/* Switch on packet protocol */
switch (ip->proto)
{
/* ICMP Packet */
case IPv4_PROTO_ICMP:
icmpRecv(pkt);
break;
/* UDP Packet */
case IPv4_PROTO_UDP:
#if NUDP
udpRecv(pkt, &src, &dst);
#endif /* NUDP */
break;
/* TCP Packet */
case IPv4_PROTO_TCP:
#if NTCP
tcpRecv(pkt, &src, &dst);
#endif /* NTCP */
break;
/* Unknown IP packet protocol */
default:
#if NRAW
rawRecv(pkt, &src, &dst, ip->proto);
#endif /* NRAW */
break;
}
return OK;
}
