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authorGeoffrey Blake <Geoffrey.Blake@arm.com>2013-10-31 13:41:13 -0500
committerGeoffrey Blake <Geoffrey.Blake@arm.com>2013-10-31 13:41:13 -0500
commitfb0496498d06def8e9b1b2ae2099b3013716b7dc (patch)
treec0127749c66e1b7cf7266e9038dba3fe9770cc9f /src/base/inet.cc
parent397dc784fd44860cf9f58ebf453769e5e2bd830b (diff)
downloadgem5-fb0496498d06def8e9b1b2ae2099b3013716b7dc.tar.xz
base: Add support for ipv6 into inet.hh/inet.cc
Diffstat (limited to 'src/base/inet.cc')
-rw-r--r--src/base/inet.cc132
1 files changed, 130 insertions, 2 deletions
diff --git a/src/base/inet.cc b/src/base/inet.cc
index d8d156478..e18858f3c 100644
--- a/src/base/inet.cc
+++ b/src/base/inet.cc
@@ -1,4 +1,16 @@
/*
+ * Copyright (c) 2013 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder. You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* Copyright (c) 2010 Advanced Micro Devices, Inc.
* All rights reserved.
@@ -28,6 +40,7 @@
*
* Authors: Nathan Binkert
* Gabe Black
+ * Geoffrey Blake
*/
#include <cstddef>
@@ -205,12 +218,41 @@ __tu_cksum(const IpPtr &ip)
}
uint16_t
+__tu_cksum6(const Ip6Ptr &ip6)
+{
+ int tcplen = ip6->plen() - ip6->extensionLength();
+ int sum = ip_cksum_add(ip6->payload(), tcplen, 0);
+ sum = ip_cksum_add(ip6->src(), 32, sum);
+ sum += htons(ip6->proto() + tcplen);
+ return ip_cksum_carry(sum);
+}
+
+uint16_t
cksum(const TcpPtr &tcp)
-{ return __tu_cksum(IpPtr(tcp.packet())); }
+{
+ if (IpPtr(tcp.packet())) {
+ return __tu_cksum(IpPtr(tcp.packet()));
+ } else if (Ip6Ptr(tcp.packet())) {
+ return __tu_cksum6(Ip6Ptr(tcp.packet()));
+ } else {
+ assert(0);
+ }
+ // Should never reach here
+ return 0;
+}
uint16_t
cksum(const UdpPtr &udp)
-{ return __tu_cksum(IpPtr(udp.packet())); }
+{
+ if (IpPtr(udp.packet())) {
+ return __tu_cksum(IpPtr(udp.packet()));
+ } else if (Ip6Ptr(udp.packet())) {
+ return __tu_cksum6(Ip6Ptr(udp.packet()));
+ } else {
+ assert(0);
+ }
+ return 0;
+}
bool
IpHdr::options(vector<const IpOpt *> &vec) const
@@ -233,6 +275,82 @@ IpHdr::options(vector<const IpOpt *> &vec) const
return true;
}
+#define IP6_EXTENSION(nxt) (nxt == IP_PROTO_HOPOPTS) ? true : \
+ (nxt == IP_PROTO_ROUTING) ? true : \
+ (nxt == IP_PROTO_FRAGMENT) ? true : \
+ (nxt == IP_PROTO_AH) ? true : \
+ (nxt == IP_PROTO_ESP) ? true: \
+ (nxt == IP_PROTO_DSTOPTS) ? true : false
+
+/* Scan the IP6 header for all header extensions
+ * and return the number of headers found
+ */
+int
+Ip6Hdr::extensionLength() const
+{
+ const uint8_t *data = bytes() + IP6_HDR_LEN;
+ uint8_t nxt = ip6_nxt;
+ int len = 0;
+ int all = plen();
+
+ while (IP6_EXTENSION(nxt)) {
+ const Ip6Opt *ext = (const Ip6Opt *)data;
+ nxt = ext->nxt();
+ len += ext->len();
+ data += ext->len();
+ all -= ext->len();
+ assert(all >= 0);
+ }
+ return len;
+}
+
+/* Scan the IP6 header for a particular extension
+ * header type and return a pointer to it if it
+ * exists, otherwise return NULL
+ */
+const Ip6Opt*
+Ip6Hdr::getExt(uint8_t ext_type) const
+{
+ const uint8_t *data = bytes() + IP6_HDR_LEN;
+ uint8_t nxt = ip6_nxt;
+ Ip6Opt* opt = NULL;
+ int all = plen();
+
+ while (IP6_EXTENSION(nxt)) {
+ opt = (Ip6Opt *)data;
+ if (nxt == ext_type) {
+ break;
+ }
+ nxt = opt->nxt();
+ data += opt->len();
+ all -= opt->len();
+ opt = NULL;
+ assert(all >= 0);
+ }
+ return (const Ip6Opt*)opt;
+}
+
+/* Scan the IP6 header and any extension headers
+ * to find what type of Layer 4 header exists
+ * after this header
+ */
+uint8_t
+Ip6Hdr::proto() const
+{
+ const uint8_t *data = bytes() + IP6_HDR_LEN;
+ uint8_t nxt = ip6_nxt;
+ int all = plen();
+
+ while (IP6_EXTENSION(nxt)) {
+ const Ip6Opt *ext = (const Ip6Opt *)data;
+ nxt = ext->nxt();
+ data += ext->len();
+ all -= ext->len();
+ assert(all >= 0);
+ }
+ return nxt;
+}
+
bool
TcpHdr::options(vector<const TcpOpt *> &vec) const
{
@@ -260,6 +378,7 @@ hsplit(const EthPacketPtr &ptr)
int split_point = 0;
IpPtr ip(ptr);
+ Ip6Ptr ip6(ptr);
if (ip) {
split_point = ip.pstart();
@@ -270,6 +389,15 @@ hsplit(const EthPacketPtr &ptr)
UdpPtr udp(ip);
if (udp)
split_point = udp.pstart();
+ } else if (ip6) {
+ split_point = ip6.pstart();
+
+ TcpPtr tcp(ip6);
+ if (tcp)
+ split_point = tcp.pstart();
+ UdpPtr udp(ip6);
+ if (udp)
+ split_point = udp.pstart();
}
return split_point;
}