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authorLisa Hsu <hsul@eecs.umich.edu>2004-06-10 14:27:44 -0400
committerLisa Hsu <hsul@eecs.umich.edu>2004-06-10 14:27:44 -0400
commit3c7f9617516ff650cd6e30d35b0b88562c0c552d (patch)
treee6f78cab869a08cb5b53add5ae593e025a4534c2 /dev
parente34a309106d6ef42ef781c6bd6294810fecf577a (diff)
downloadgem5-3c7f9617516ff650cd6e30d35b0b88562c0c552d.tar.xz
fix some things on linux todo list. 1) the config.ini. 2) the etherpkt struct defs into ined_hdrs.hh
3) add some new functions to etherpkt. 4) checkin the nice ping_linux.ini that i've been using. dev/etherpkt.hh: remove the packet headers nate hated so much. also add some new functionality regarding packets, like isIpHdr(), etc. dev/ns_gige.cc: improve the code given the nice new functions offered in etherpkt --HG-- extra : convert_revision : 2e27f5a8dca5323c0fa22d3c51af44a35f6be1a2
Diffstat (limited to 'dev')
-rw-r--r--dev/etherpkt.hh85
-rw-r--r--dev/ns_gige.cc16
2 files changed, 27 insertions, 74 deletions
diff --git a/dev/etherpkt.hh b/dev/etherpkt.hh
index e51210e2e..8d0022363 100644
--- a/dev/etherpkt.hh
+++ b/dev/etherpkt.hh
@@ -38,67 +38,9 @@
#include "sim/host.hh"
#include "base/refcnt.hh"
-
-#define EADDR_LEN 6
+#include "base/inet_hdrs.hh"
class Checkpoint;
-
-struct pseudo_header
-{
- uint32_t src_ip_addr;
- uint32_t dest_ip_addr;
- uint16_t protocol;
- uint16_t len;
-};
-
-/** Ethernet header struct for casting purposes */
-struct eth_header
-{
- uint8_t dest[EADDR_LEN];
- uint8_t src[EADDR_LEN];
- uint16_t type;
-};
-
-struct ip_header
-{
- uint8_t vers_len;
- uint8_t service_type;
- uint16_t dgram_len;
- uint16_t ID;
- uint16_t flags_frag_offset;
- uint8_t TTL;
- uint8_t protocol;
- uint16_t hdr_chksum;
- uint32_t src_ip_addr;
- uint32_t dest_ip_addr;
- uint8_t *options;
- uint8_t *transport_header;
-};
-
-struct tcp_header
-{
- uint16_t src_port_num;
- uint16_t dest_port_num;
- uint32_t seq_num;
- uint32_t ack_num;
- uint8_t hdr_len;
- uint8_t flags;
- uint16_t rcv_window;
- uint16_t chksum;
- uint16_t urgent;
- uint8_t *options;
- uint8_t *data;
-};
-
-struct udp_header
-{
- uint16_t src_port_num;
- uint16_t dest_port_num;
- uint16_t len;
- uint16_t chksum;
- uint8_t *data;
-};
-
/*
* Reference counted class containing ethernet packet data
*/
@@ -119,14 +61,31 @@ class EtherPacket : public RefCounted
bool IsMulticast() { return data[0] == 0x01; }
bool IsBroadcast() { return data[0] == 0xff; }
- ip_header *getIpHdr() { return (ip_header *) (data + 14); }
-
- void *getTransportHdr() {
+ bool isIpPkt() {
+ eth_header *eth = (eth_header *) data;
+ return (eth->type == 0x800);
+ }
+ bool isTcpPkt() {
ip_header *ip = getIpHdr();
- return (void *) (ip + (ip->vers_len & 0xf));
+ return (ip->protocol == 6);
+ }
+ bool isUdpPkt() {
+ ip_header *ip = getIpHdr();
+ return (ip->protocol == 17);
+ }
+
+ ip_header *getIpHdr() {
+ assert(isIpPkt());
+ return (ip_header *) (data + sizeof(eth_header));
}
+ tcp_header *getTcpHdr(ip_header *ip) {
+ return (tcp_header *) (ip + (ip->vers_len & 0xf));
+ }
+ udp_header *getUdpHdr(ip_header *ip) {
+ return (udp_header *) (ip + (ip->vers_len & 0xf));
+ }
typedef RefCountingPtr<EtherPacket> PacketPtr;
void serialize(std::ostream &os);
diff --git a/dev/ns_gige.cc b/dev/ns_gige.cc
index 812c10df4..486d16cb5 100644
--- a/dev/ns_gige.cc
+++ b/dev/ns_gige.cc
@@ -1299,19 +1299,15 @@ NSGigE::rxKick()
}
#endif
- eth_header *eth = (eth_header *) rxPacket->data;
- // eth->type 0x800 indicated that it's an ip packet.
- if (eth->type == 0x800 && extstsEnable) {
- rxDescCache.extsts |= EXTSTS_IPPKT;
+ if (rxPacket->isIpPkt() && extstsEnable) { rxDescCache.extsts |= EXTSTS_IPPKT;
if (!ipChecksum(rxPacket, false))
rxDescCache.extsts |= EXTSTS_IPERR;
- ip_header *ip = rxFifo.front()->getIpHdr();
- if (ip->protocol == 6) {
+ if (rxPacket->isTcpPkt()) {
rxDescCache.extsts |= EXTSTS_TCPPKT;
if (!tcpChecksum(rxPacket, false))
rxDescCache.extsts |= EXTSTS_TCPERR;
- } else if (ip->protocol == 17) {
+ } else if (rxPacket->isUdpPkt()) {
rxDescCache.extsts |= EXTSTS_UDPPKT;
if (!udpChecksum(rxPacket, false))
rxDescCache.extsts |= EXTSTS_UDPERR;
@@ -1914,9 +1910,8 @@ NSGigE::recvPacket(PacketPtr packet)
bool
NSGigE::udpChecksum(PacketPtr packet, bool gen)
{
- udp_header *hdr = (udp_header *) packet->getTransportHdr();
-
ip_header *ip = packet->getIpHdr();
+ udp_header *hdr = packet->getUdpHdr(ip);
pseudo_header *pseudo = new pseudo_header;
@@ -1941,9 +1936,8 @@ NSGigE::udpChecksum(PacketPtr packet, bool gen)
bool
NSGigE::tcpChecksum(PacketPtr packet, bool gen)
{
- tcp_header *hdr = (tcp_header *) packet->getTransportHdr();
-
ip_header *ip = packet->getIpHdr();
+ tcp_header *hdr = packet->getTcpHdr(ip);
pseudo_header *pseudo = new pseudo_header;