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-rw-r--r--src/base/inet.cc132
-rw-r--r--src/base/inet.hh239
2 files changed, 352 insertions, 19 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;
}
diff --git a/src/base/inet.hh b/src/base/inet.hh
index 4abac7400..afa6c402a 100644
--- a/src/base/inet.hh
+++ b/src/base/inet.hh
@@ -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.
@@ -29,6 +41,7 @@
* Authors: Nathan Binkert
* Steve Reinhardt
* Gabe Black
+ * Geoffrey Blake
*/
#ifndef __BASE_INET_HH__
@@ -104,11 +117,31 @@ bool operator==(const EthAddr &left, const EthAddr &right);
struct EthHdr : public eth_hdr
{
- uint16_t type() const { return ntohs(eth_type); }
+ bool isVlan() const { return (ntohs(eth_type) == ETH_TYPE_8021Q); }
+ uint16_t type() const {
+ if (!isVlan())
+ return ntohs(eth_type);
+ else
+ // L3 type is now 16 bytes into the hdr with 802.1Q
+ // instead of 12. dnet/eth.h only supports 802.1
+ return ntohs(*((uint16_t*)(((uint8_t *)this) + 16)));
+ }
+ uint16_t vlanId() const {
+ if (isVlan())
+ return ntohs(*((uint16_t*)(((uint8_t *)this) + 14)));
+ else
+ return 0x0000;
+ }
+
const EthAddr &src() const { return *(EthAddr *)&eth_src; }
const EthAddr &dst() const { return *(EthAddr *)&eth_dst; }
- int size() const { return sizeof(eth_hdr); }
+ int size() const {
+ if (!isVlan())
+ return sizeof(eth_hdr);
+ else
+ return (sizeof(eth_hdr)+4);
+ }
const uint8_t *bytes() const { return (const uint8_t *)this; }
const uint8_t *payload() const { return bytes() + size(); }
@@ -120,6 +153,7 @@ class EthPtr
{
protected:
friend class IpPtr;
+ friend class Ip6Ptr;
EthPacketPtr p;
public:
@@ -226,7 +260,6 @@ struct IpHdr : public ip_hdr
void id(uint16_t _id) { ip_id = htons(_id); }
void len(uint16_t _len) { ip_len = htons(_len); }
-
bool options(std::vector<const IpOpt *> &vec) const;
int size() const { return hlen(); }
@@ -242,30 +275,36 @@ class IpPtr
friend class TcpPtr;
friend class UdpPtr;
EthPacketPtr p;
+ bool eth_hdr_vlan;
void set(const EthPacketPtr &ptr)
{
p = 0;
+ eth_hdr_vlan = false;
if (ptr) {
EthHdr *eth = (EthHdr *)ptr->data;
if (eth->type() == ETH_TYPE_IP)
p = ptr;
+ if (eth->isVlan())
+ eth_hdr_vlan = true;
}
}
public:
- IpPtr() : p(0) {}
- IpPtr(const EthPacketPtr &ptr) : p(0) { set(ptr); }
- IpPtr(const EthPtr &ptr) : p(0) { set(ptr.p); }
- IpPtr(const IpPtr &ptr) : p(ptr.p) { }
+ IpPtr() : p(0), eth_hdr_vlan(false) {}
+ IpPtr(const EthPacketPtr &ptr) : p(0), eth_hdr_vlan(false) { set(ptr); }
+ IpPtr(const EthPtr &ptr) : p(0), eth_hdr_vlan(false) { set(ptr.p); }
+ IpPtr(const IpPtr &ptr) : p(ptr.p), eth_hdr_vlan(ptr.eth_hdr_vlan) { }
- IpHdr *get() { return (IpHdr *)(p->data + sizeof(eth_hdr)); }
+ IpHdr *get() { return (IpHdr *)(p->data + sizeof(eth_hdr) +
+ ((eth_hdr_vlan) ? 4 : 0)); }
IpHdr *operator->() { return get(); }
IpHdr &operator*() { return *get(); }
const IpHdr *get() const
- { return (const IpHdr *)(p->data + sizeof(eth_hdr)); }
+ { return (const IpHdr *)(p->data + sizeof(eth_hdr) +
+ ((eth_hdr_vlan) ? 4 : 0)); }
const IpHdr *operator->() const { return get(); }
const IpHdr &operator*() const { return *get(); }
@@ -277,8 +316,8 @@ class IpPtr
EthPacketPtr packet() { return p; }
bool operator!() const { return !p; }
operator bool() const { return p; }
- int off() const { return sizeof(eth_hdr); }
- int pstart() const { return off() + get()->size(); }
+ int off() const { return (sizeof(eth_hdr) + ((eth_hdr_vlan) ? 4 : 0)); }
+ int pstart() const { return (off() + get()->size()); }
};
uint16_t cksum(const IpPtr &ptr);
@@ -310,6 +349,152 @@ struct IpOpt : public ip_opt
};
/*
+ * Ip6 Classes
+ */
+struct Ip6Opt;
+struct Ip6Hdr : public ip6_hdr
+{
+ uint8_t version() const { return ip6_vfc; }
+ uint32_t flow() const { return ntohl(ip6_flow); }
+ uint16_t plen() const { return ntohs(ip6_plen); }
+ uint16_t hlen() const { return IP6_HDR_LEN; }
+ uint8_t nxt() const { return ip6_nxt; }
+ uint8_t hlim() const { return ip6_hlim; }
+
+ const uint8_t* src() const { return ip6_src.data; }
+ const uint8_t* dst() const { return ip6_dst.data; }
+
+ int extensionLength() const;
+ const Ip6Opt* getExt(uint8_t ext) const;
+ const Ip6Opt* fragmentExt() const { return getExt(IP_PROTO_FRAGMENT); }
+ const Ip6Opt* rtTypeExt() const { return getExt(IP_PROTO_ROUTING); }
+ const Ip6Opt* dstOptExt() const { return getExt(IP_PROTO_DSTOPTS); }
+ uint8_t proto() const;
+
+ void plen(uint16_t _plen) { ip6_plen = htons(_plen); }
+
+ int size() const { return IP6_HDR_LEN + extensionLength(); }
+ const uint8_t *bytes() const { return (const uint8_t *)this; }
+ const uint8_t *payload() const { return bytes() + IP6_HDR_LEN
+ + extensionLength(); }
+ uint8_t *bytes() { return (uint8_t *)this; }
+ uint8_t *payload() { return bytes() + IP6_HDR_LEN
+ + extensionLength(); }
+};
+
+class Ip6Ptr
+{
+ protected:
+ friend class TcpPtr;
+ friend class UdpPtr;
+ EthPacketPtr p;
+ bool eth_hdr_vlan;
+
+ void set(const EthPacketPtr &ptr)
+ {
+ p = 0;
+ eth_hdr_vlan = false;
+
+ if (ptr) {
+ EthHdr *eth = (EthHdr *)ptr->data;
+ if (eth->type() == ETH_TYPE_IPV6)
+ p = ptr;
+ if (eth->isVlan())
+ eth_hdr_vlan = true;
+ }
+ }
+
+ public:
+ Ip6Ptr() : p(0), eth_hdr_vlan(false) {}
+ Ip6Ptr(const EthPacketPtr &ptr) : p(0), eth_hdr_vlan(false) { set(ptr); }
+ Ip6Ptr(const EthPtr &ptr) : p(0), eth_hdr_vlan(false) { set(ptr.p); }
+ Ip6Ptr(const Ip6Ptr &ptr) : p(ptr.p), eth_hdr_vlan(ptr.eth_hdr_vlan) { }
+
+ Ip6Hdr *get() { return (Ip6Hdr *)(p->data + sizeof(eth_hdr)
+ + ((eth_hdr_vlan) ? 4 : 0)); }
+ Ip6Hdr *operator->() { return get(); }
+ Ip6Hdr &operator*() { return *get(); }
+
+ const Ip6Hdr *get() const
+ { return (const Ip6Hdr *)(p->data + sizeof(eth_hdr)
+ + ((eth_hdr_vlan) ? 4 : 0)); }
+ const Ip6Hdr *operator->() const { return get(); }
+ const Ip6Hdr &operator*() const { return *get(); }
+
+ const Ip6Ptr &operator=(const EthPacketPtr &ptr)
+ { set(ptr); return *this; }
+ const Ip6Ptr &operator=(const EthPtr &ptr)
+ { set(ptr.p); return *this; }
+ const Ip6Ptr &operator=(const Ip6Ptr &ptr)
+ { p = ptr.p; return *this; }
+
+ const EthPacketPtr packet() const { return p; }
+ EthPacketPtr packet() { return p; }
+ bool operator!() const { return !p; }
+ operator bool() const { return p; }
+ int off() const { return sizeof(eth_hdr) + ((eth_hdr_vlan) ? 4 : 0); }
+ int pstart() const { return off() + get()->size(); }
+};
+
+// Dnet supplied ipv6 opt header is incomplete and
+// newer NIC card filters expect a more robust
+// ipv6 header option declaration.
+struct ip6_opt_fragment {
+ uint16_t offlg;
+ uint32_t ident;
+};
+
+struct ip6_opt_routing_type2 {
+ uint8_t type;
+ uint8_t segleft;
+ uint32_t reserved;
+ ip6_addr_t addr;
+};
+
+#define HOME_ADDRESS_OPTION 0xC9
+struct ip6_opt_dstopts {
+ uint8_t type;
+ uint8_t length;
+ ip6_addr_t addr;
+} __attribute__((packed));
+
+struct ip6_opt_hdr
+{
+ uint8_t ext_nxt;
+ uint8_t ext_len;
+ union {
+ struct ip6_opt_fragment fragment;
+ struct ip6_opt_routing_type2 rtType2;
+ struct ip6_opt_dstopts dstOpts;
+ } ext_data;
+} __attribute__((packed));
+
+struct Ip6Opt : public ip6_opt_hdr
+{
+ uint8_t nxt() const { return ext_nxt; }
+ uint8_t extlen() const { return ext_len; }
+ uint8_t len() const { return extlen() + 8; }
+
+ // Supporting the types of header extensions likely to be encountered:
+ // fragment, routing type 2 and dstopts.
+
+ // Routing type 2
+ uint8_t rtType2Type() const { return ext_data.rtType2.type; }
+ uint8_t rtType2SegLft() const { return ext_data.rtType2.segleft; }
+ const uint8_t* rtType2Addr() const { return ext_data.rtType2.addr.data; }
+
+ // Fragment
+ uint16_t fragmentOfflg() const { return ntohs(ext_data.fragment.offlg); }
+ uint32_t fragmentIdent() const { return ntohl(ext_data.fragment.ident); }
+
+ // Dst Options/Home Address Option
+ uint8_t dstOptType() const { return ext_data.dstOpts.type; }
+ uint8_t dstOptLength() const { return ext_data.dstOpts.length; }
+ const uint8_t* dstOptAddr() const { return ext_data.dstOpts.addr.data; }
+};
+
+
+/*
* TCP Stuff
*/
struct TcpOpt;
@@ -319,7 +504,7 @@ struct TcpHdr : public tcp_hdr
uint16_t dport() const { return ntohs(th_dport); }
uint32_t seq() const { return ntohl(th_seq); }
uint32_t ack() const { return ntohl(th_ack); }
- uint8_t off() const { return th_off; }
+ uint8_t off() const { return th_off*4; }
uint8_t flags() const { return th_flags & 0x3f; }
uint16_t win() const { return ntohs(th_win); }
uint16_t sum() const { return th_sum; }
@@ -348,7 +533,14 @@ class TcpPtr
void set(const IpPtr &ptr)
{
if (ptr && ptr->proto() == IP_PROTO_TCP)
- set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
+ set(ptr.p, ptr.pstart());
+ else
+ set(0, 0);
+ }
+ void set(const Ip6Ptr &ptr)
+ {
+ if (ptr && ptr->proto() == IP_PROTO_TCP)
+ set(ptr.p, ptr.pstart());
else
set(0, 0);
}
@@ -356,6 +548,7 @@ class TcpPtr
public:
TcpPtr() : p(0), _off(0) {}
TcpPtr(const IpPtr &ptr) : p(0), _off(0) { set(ptr); }
+ TcpPtr(const Ip6Ptr &ptr) : p(0), _off(0) { set(ptr); }
TcpPtr(const TcpPtr &ptr) : p(ptr.p), _off(ptr._off) {}
TcpHdr *get() { return (TcpHdr *)(p->data + _off); }
@@ -366,8 +559,10 @@ class TcpPtr
const TcpHdr *operator->() const { return get(); }
const TcpHdr &operator*() const { return *get(); }
- const TcpPtr &operator=(const IpPtr &i) { set(i); return *this; }
- const TcpPtr &operator=(const TcpPtr &t) { set(t.p, t._off); return *this; }
+ const TcpPtr &operator=(const IpPtr &i)
+ { set(i); return *this; }
+ const TcpPtr &operator=(const TcpPtr &t)
+ { set(t.p, t._off); return *this; }
const EthPacketPtr packet() const { return p; }
EthPacketPtr packet() { return p; }
@@ -434,7 +629,14 @@ class UdpPtr
void set(const IpPtr &ptr)
{
if (ptr && ptr->proto() == IP_PROTO_UDP)
- set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
+ set(ptr.p, ptr.pstart());
+ else
+ set(0, 0);
+ }
+ void set(const Ip6Ptr &ptr)
+ {
+ if (ptr && ptr->proto() == IP_PROTO_UDP)
+ set(ptr.p, ptr.pstart());
else
set(0, 0);
}
@@ -442,6 +644,7 @@ class UdpPtr
public:
UdpPtr() : p(0), _off(0) {}
UdpPtr(const IpPtr &ptr) : p(0), _off(0) { set(ptr); }
+ UdpPtr(const Ip6Ptr &ptr) : p(0), _off(0) { set(ptr); }
UdpPtr(const UdpPtr &ptr) : p(ptr.p), _off(ptr._off) {}
UdpHdr *get() { return (UdpHdr *)(p->data + _off); }
@@ -453,7 +656,8 @@ class UdpPtr
const UdpHdr &operator*() const { return *get(); }
const UdpPtr &operator=(const IpPtr &i) { set(i); return *this; }
- const UdpPtr &operator=(const UdpPtr &t) { set(t.p, t._off); return *this; }
+ const UdpPtr &operator=(const UdpPtr &t)
+ { set(t.p, t._off); return *this; }
const EthPacketPtr packet() const { return p; }
EthPacketPtr packet() { return p; }
@@ -463,6 +667,7 @@ class UdpPtr
int pstart() const { return off() + get()->size(); }
};
+uint16_t __tu_cksum6(const Ip6Ptr &ip6);
uint16_t __tu_cksum(const IpPtr &ip);
uint16_t cksum(const UdpPtr &ptr);
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-30 12:53:50 +0000