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BIRD library: The story continues.

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Complete resource manages and IP address handling.
This commit is contained in:
Martin Mares 1998-05-03 16:43:39 +00:00
parent a8b6038225
commit 18c8241a91
21 changed files with 920 additions and 128 deletions
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10
Makefile
View file

@ -2,11 +2,13 @@
# (c) 1998 Martin Mares <mj@ucw.cz>
TOPDIR=$(shell pwd)
CPPFLAGS=-I$(TOPDIR)
CFLAGS=-O2 -Wall -W -Wstrict-prototypes -Wno-unused -Wno-parentheses $(CPPFLAGS)
CPPFLAGS=-I$(TOPDIR)/sysdep/linux -I$(TOPDIR)
OPT=-O2
DEBUG=-g#gdb
CFLAGS=$(OPT) $(DEBUG) -Wall -W -Wstrict-prototypes -Wno-unused -Wno-parentheses
PROTOCOLS=
DIRS=sysdep/linux nest $(PROTOCOLS) lib
DIRS=nest $(PROTOCOLS) lib sysdep/linux sysdep/unix
ARCHS=$(join $(addsuffix /,$(DIRS)),$(subst /,_,$(addsuffix .a,$(DIRS))))
export
@ -27,5 +29,5 @@ dep:
set -e ; for a in $(DIRS) ; do $(MAKE) -C $$a dep ; done
clean:
rm -f `find . -name "*~" -or -name "*.[oa]" -or -name "\#*\#" -or -name TAGS -or -name core -or -name .depend`
rm -f `find . -name "*~" -or -name "*.[oa]" -or -name "\#*\#" -or -name TAGS -or -name core -or -name .depend -or -name .#*`
rm -f bird .dep

145
TODO
View file

@ -1,58 +1,70 @@
Core
~~~~
- route validation
- fake multipath?
- config file: symbolic constants?
- counters (according to SNMP MIB?)
- generation of subnet mask ICMP's for v6?
- debugging dumps and protocol tracing!
- unaligned accesses?
- neighbor cache: local broadcast address?
- ipv4: recognize site scope addresses?
- ifdef out some debugging code?
- better memory allocators
- precedence of all packets (incl. TCP)
- default preferences of protocols: prefer BGP over OSPF/RIP external routes?
- all internal tables are in host order
- filter: logging of dropped routes (?)
- limitation of memory consumption: per-process and total (?)
- alloca
- adding of route: clear all bits not covered by masklen
- switch: generate default route only if at least one BGP connection exists
- route recalculation timing + flap dampening
- reconfiguration without restart of all protocols?
- change of interface address: ??? (down and up?)
- "generate default route" switch for all IGP's
- running protocol on an interface:
- interface is not required to exist
- can specify a wildcard pattern or an interface list
- timers - one-shot and periodic, resolution 1 sec, randomized
- re-configuration: restart of routing protocols (shutdown mode)
- route: originating AS
- Check incoming packets and log errors!!
RIP
~~~
- RIP: export-only and import-only mode?
- drop RIPv1 (Historic protocol)?
- Route Tag
- limit routing table xfer (frequency, only to neighbors)
- multicast on/off
- remember routes for all neighbors?
OSPF
~~~~
- Dijkstra: use Fibonacci heaps?
- point-to-point interface with address: advertise as stub network
- static routes: stub networks?
- modes: PtP, PtP-unnumbered, Broadcast, NBMA, point-to-multipoint
- importing of device routes for networks where we don't run OSPF
- tie breaking for equal type 2 ext metrics by using internal (type 1) metric
- SPF tree recalc timing (per-area timers?)
- aggregation: specify network list for each area
- stub area: either no external routes or only default route
- automatic generation of external route tags (RFC1403)
Almquist & Kastenholz [Page 111]
RFC 1716 Towards Requirements for IP Routers November 1994
7.2.2.2 Specific Issues
Virtual Links
There is a minor error in the specification that can cause
routing loops when all of the following conditions are
simultaneously true:
(1) A virtual link is configured through a transit area,
(2) Two separate paths exist, each having the same
endpoints, but one utilizing only non-virtual
backbone links, and the other using links in the
transit area, and
(3) The latter path is part of the (underlying physical
representation of the) configured virtual link,
routing loops may occur.
To prevent this, an implementation of OSPF SHOULD invoke
the calculation in Section 16.3 of [ROUTE:1] whenever any
part of the path to the destination is a virtual link (the
specification only says this is necessary when the first
hop is a virtual link).
BGP
~~~
- BGP:
- in, local, out RIB
- maxsize=4096
- BGP identifier aka router id
- removal of loops
- detection of loops
- aggregation, ATOMIC_AGGREGATE
- communities
- confederations
@ -71,73 +83,4 @@ BGP
- expected neighbor AS
- hold time
- idle timer after error: initial value, exponential growth, maximum value
- address testing macros (ALL_ZEROS)
- all internal tables are in network order (?)
- logging of errors and debug dumps
- filter: logging of dropped routes (?)
- limitation of memory consumption: per-process and total
- alloca
- precedence of all packets (incl. TCP)
- adding of route: clear all bits not covered by masklen
- switch: generate default route only if at least one BGP connection exists
- route update: new, change, remove
- route recalculation timing
- CONFIG_TOS
- CONFIG_MULTIPATH
- reconfiguration without restart of all protocols?
- change of interface address: ??? (down and up?)
- "generate default route" switch for all IGP's
- RIPv2:
- Route Tag
- limit routing table xfer (frequency, only to neighbors)
- multicast on/off
- remember routes for all neighbors?
- BGP:
- import of IGP routes (use external route tags from OSPF)
- Interface:
- RIP metric
- multicast capability flag
- MTU
- OSPF metrics (per-TOS)
- running protocol on an interface:
- interface is not required to exist
- can specify a wildcard pattern or an interface list
- preferences:
- directly connected
- static
- OSPF internal, OSPF ext type 1 (comparable metrics), OSPF inter-area
- RIP
- BGP
- OSPF ext type 2
- sink
- lib:
- MD5
- OSPF:
- Dijkstra: use Fibonacci heaps?
- point-to-point interface with address: advertise as stub network
- static routes: stub networks?
- modes: PtP, PtP-unnumbered, Broadcast, NBMA, point-to-multipoint
- importing of device routes for networks where we don't run OSPF
- tie breaking for equal type 2 ext metrics by using internal (type 1) metric
- SPF tree recalc timing (per-area timers?)
- aggregation: specify network list for each area
- stub area: either no external routes or only default route
- automatic generation of external route tags (RFC1403) -- what about
using the same rule for RIPv2? [shared code?]
- timers - one-shot and periodic, resolution 1 sec, randomized
- re-configuration: restart of routing protocols (shutdown mode)
- route: originating AS
- Check incoming packets and log errors!!

8
lib/Makefile
View file

@ -1,3 +1,9 @@
OBJS=lists.o
OBJS=lists.o bitops.o resource.o xmalloc.o mempool.o slab.o md5.o
ifdef IPV6
OBJS += ipv6.o
else
OBJS += ipv4.o
endif
include $(TOPDIR)/Rules

13
lib/birdlib.h
View file

@ -13,17 +13,28 @@
#define OFFSETOF(s, i) ((unsigned int)&((s *)0)->i)
#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
#define ALIGN(s, a) (((s)+a-1)&~(a-1))
/* Functions which don't return */
#define NORET __attribute__((noreturn))
/* Logging and dying */
void log(char *msg, ...);
void die(char *msg, ...);
void die(char *msg, ...) NORET;
#define L_DEBUG "\001" /* Debugging messages */
#define L_INFO "\002" /* Informational messages */
#define L_WARN "\003" /* Warnings */
#define L_ERR "\004" /* Errors */
#define L_AUTH "\005" /* Authorization failed etc. */
#define L_FATAL "\006" /* Fatal errors */
void log_init(char *); /* Initialize logging to given file (NULL=stderr, ""=syslog) */
void log_init_debug(char *); /* Initialize debug dump to given file (NULL=stderr, ""=off) */
void debug(char *msg, ...); /* Printf to debug output */
/* Debugging */

32
lib/bitops.c Normal file
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@ -0,0 +1,32 @@
/*
* BIRD Library -- Generic Bit Operations
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "nest/bird.h"
#include "bitops.h"
u32
u32_mkmask(unsigned n)
{
return n ? ~((1 << (32 - n)) - 1) : 0;
}
int
u32_masklen(u32 x)
{
int l = 0;
u32 n = ~x;
if (n & (n+1)) return -1;
if (x & 0x0000ffff) { x &= 0x0000ffff; l += 16; }
if (x & 0x00ff00ff) { x &= 0x00ff00ff; l += 8; }
if (x & 0x0f0f0f0f) { x &= 0x0f0f0f0f; l += 4; }
if (x & 0x33333333) { x &= 0x33333333; l += 2; }
if (x & 0x55555555) l++;
if (x & 0xaaaaaaaa) l++;
return l;
}

19
lib/bitops.h Normal file
View file

@ -0,0 +1,19 @@
/*
* BIRD Library -- Generic Bit Operations
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
/*
* Bit mask operations:
*
* u32_mkmask Make bit mask consisting of <n> consecutive ones
* from the left and the rest filled with zeroes.
* E.g., u32_mkmask(5) = 0xf8000000.
* u32_masklen Inverse operation to u32_mkmask, -1 if not a bitmask.
*/
u32 u32_mkmask(unsigned);
int u32_masklen(u32);

20
lib/ip.h
View file

@ -15,4 +15,24 @@
#include "ipv6.h"
#endif
/*
* ip_classify() returns either a negative number for invalid addresses
* or scope OR'ed together with address type.
*/
#define IADDR_INVALID -1
#define IADDR_SCOPE_MASK 0xfff
#define IADDR_HOST 0x1000
#define IADDR_BROADCAST 0x2000
#define IADDR_MULTICAST 0x4000
/*
* Address scope
*/
#define SCOPE_HOST 0
#define SCOPE_LINK 1
#define SCOPE_SITE 2
#define SCOPE_UNIVERSE 3
#endif

29
lib/ipv4.c Normal file
View file

@ -0,0 +1,29 @@
/*
* BIRD Library -- IPv4 Address Manipulation Functions
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "nest/bird.h"
#include "lib/ip.h"
int
ipv4_classify(u32 a)
{
u32 b = a >> 24U;
if (b && b <= 0xdf)
{
if (b == 0x7f)
return IADDR_HOST | SCOPE_HOST;
else
return IADDR_HOST | SCOPE_UNIVERSE;
}
if (b >= 0xe0 && b <= 0xef)
return IADDR_MULTICAST | SCOPE_UNIVERSE;
if (a == 0xffffffff)
return IADDR_BROADCAST | SCOPE_LINK;
return IADDR_INVALID;
}

34
lib/ipv4.h
View file

@ -11,6 +11,15 @@
#include <netinet/in.h>
#include "lib/bitops.h"
#ifdef DEBUG
/*
* Use the structural representation when you want to make sure
* nobody unauthorized attempts to handle ip_addr as number.
*/
typedef struct ipv4_addr {
u32 addr;
} ip_addr;
@ -18,18 +27,37 @@ typedef struct ipv4_addr {
#define _I(x) (x).addr
#define _MI(x) ((struct ip_addr) { x })
#else
typedef u32 ip_addr;
#define _I(x) (x)
#define _MI(x) (x)
#endif
#define IPA_NONE (_MI(0))
#define ipa_equal(x,y) (_I(x) == _I(y))
#define ipa_nonzero(x) _I(x)
#define ipa_and(x,y) _MI(_I(x) & _I(y))
#define ipa_or(x,y) _MI(_I(x) | _I(y))
#define ipa_not(x) _MI(~_I(x))
#define ipa_mkmask(x) _MI(ipv4_mkmask(x))
#define ipa_mklen(x) ipv4_mklen(_I(x))
#define ipa_mkmask(x) _MI(u32_mkmask(x))
#define ipa_mklen(x) u32_masklen(_I(x))
#define ipa_hash(x) ipv4_hash(_I(x))
#define ipa_hton(x) x = _MI(htonl(_I(x)))
#define ipa_ntoh(x) x = _MI(ntohl(_I(x)))
#define ipa_classify(x) ipv4_classify(_I(x))
unsigned ipv4_mklen(u32);
u32 ipv4_mkmask(unsigned);
int ipv4_classify(u32);
/* ??? htonl and ntohl ??? */
/* FIXME: Is this hash function uniformly distributed over standard routing tables? */
static inline unsigned ipv4_hash(u32 a)
{
return a ^ (a >> 16) ^ (a >> 24);
}
#endif

12
lib/ipv6.c Normal file
View file

@ -0,0 +1,12 @@
/*
* BIRD Library -- IPv6 Address Manipulation Functions
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "nest/bird.h"
#include "lib/ip.h"
#error "Ought to implement these."

20
lib/ipv6.h
View file

@ -25,6 +25,7 @@ typedef struct ipv4_addr {
#define IPA_NONE _MI(0,0,0,0)
#define ipa_equal(x,y) (!memcmp(&(x),&(y),sizeof(ip_addr)))
#define ipa_nonzero(x) (_I0(a) || _I1(a) || _I2(a) || _I3(a))
#define ipa_and(a,b) _MI(_I0(a) & _I0(b), \
_I1(a) & _I1(b), \
_I2(a) & _I2(b), \
@ -34,11 +35,24 @@ typedef struct ipv4_addr {
_I2(a) | _I2(b), \
_I3(a) | _I3(b))
#define ipa_not(a) _MI(~_I0(a),~_I1(a),~_I2(a),~_I3(a))
#define ipa_mkmask(x) ipv6_mkmask(x)
#define ipa_mklen(x) ipv6_mklen(x)
#define ipa_mklen(x) ipv6_mklen(&(x))
#define ipa_hash(x) ipv6_hash(&(x))
#define ipa_hton(x) ipv6_hton(&(x))
#define ipa_ntoh(x) ipv6_ntoh(&(x))
#define ipa_classify(x) ipv6_classify(&(x))
ip_addr ipv6_mkmask(unsigned);
unsigned ipv6_mklen(ip_addr);
unsigned ipv6_mklen(ip_addr *);
int ipv6_classify(ip_addr *);
void ipv6_hton(ip_addr *);
void ipv6_ntoh(ip_addr *);
/* FIXME: Is this hash function uniformly distributed over standard routing tables? */
static inline unsigned ipv6_hash(ip_addr *a)
{
u32 x = _I0(*a) ^ _I1(*a) ^ _I2(*a) ^ _I3(*a);
return x ^ (x >> 16) ^ (x >> 8);
}
#endif

2
lib/lists.c
View file

@ -16,7 +16,7 @@ add_tail(list *l, node *n)
{
node *z = l->tail;
n->next = (node *) &l->tail;
n->next = (node *) &l->null;
n->prev = z;
z->next = n;
l->tail = n;

2
lib/lists.h
View file

@ -33,7 +33,7 @@ void insert_node(node *, node *);
#ifndef _BIRD_LISTS_C_
#define LIST_INLINE extern inline
#include <lib/lists.c>
#include "lib/lists.c"
#undef LIST_INLINE
#else
#define LIST_INLINE

252
lib/md5.c Normal file
View file

@ -0,0 +1,252 @@
/*
* This code implements the MD5 message-digest algorithm.
* The algorithm is due to Ron Rivest. This code was
* written by Colin Plumb in 1993, no copyright is claimed.
* This code is in the public domain; do with it what you wish.
*
* Equivalent code is available from RSA Data Security, Inc.
* This code has been tested against that, and is equivalent,
* except that you don't need to include two pages of legalese
* with every copy.
*
* To compute the message digest of a chunk of bytes, declare an
* MD5Context structure, pass it to MD5Init, call MD5Update as
* needed on buffers full of bytes, and then call MD5Final, which
* will fill a supplied 16-byte array with the digest.
*/
/*
* Adapted for BIRD by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
*/
#include <string.h> /* for memcpy() */
#include "nest/bird.h"
#include "md5.h"
#ifdef CPU_LITTLE_ENDIAN
#define byteReverse(buf, len) /* Nothing */
#else
void byteReverse(unsigned char *buf, unsigned longs);
/*
* Note: this code is harmless on little-endian machines.
*/
void byteReverse(unsigned char *buf, unsigned longs)
{
u32 t;
do {
t = (u32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
((unsigned) buf[1] << 8 | buf[0]);
*(u32 *) buf = t;
buf += 4;
} while (--longs);
}
#endif
/*
* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
* initialization constants.
*/
void MD5Init(struct MD5Context *ctx)
{
ctx->buf[0] = 0x67452301;
ctx->buf[1] = 0xefcdab89;
ctx->buf[2] = 0x98badcfe;
ctx->buf[3] = 0x10325476;
ctx->bits[0] = 0;
ctx->bits[1] = 0;
}
/*
* Update context to reflect the concatenation of another buffer full
* of bytes.
*/
void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len)
{
u32 t;
/* Update bitcount */
t = ctx->bits[0];
if ((ctx->bits[0] = t + ((u32) len << 3)) < t)
ctx->bits[1]++; /* Carry from low to high */
ctx->bits[1] += len >> 29;
t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
/* Handle any leading odd-sized chunks */
if (t) {
unsigned char *p = (unsigned char *) ctx->in + t;
t = 64 - t;
if (len < t) {
memcpy(p, buf, len);
return;
}
memcpy(p, buf, t);
byteReverse(ctx->in, 16);
MD5Transform(ctx->buf, (u32 *) ctx->in);
buf += t;
len -= t;
}
/* Process data in 64-byte chunks */
while (len >= 64) {
memcpy(ctx->in, buf, 64);
byteReverse(ctx->in, 16);
MD5Transform(ctx->buf, (u32 *) ctx->in);
buf += 64;
len -= 64;
}
/* Handle any remaining bytes of data. */
memcpy(ctx->in, buf, len);
}
/*
* Final wrapup - pad to 64-byte boundary with the bit pattern
* 1 0* (64-bit count of bits processed, MSB-first)
*/
void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
{
unsigned count;
unsigned char *p;
/* Compute number of bytes mod 64 */
count = (ctx->bits[0] >> 3) & 0x3F;
/* Set the first char of padding to 0x80. This is safe since there is
always at least one byte free */
p = ctx->in + count;
*p++ = 0x80;
/* Bytes of padding needed to make 64 bytes */
count = 64 - 1 - count;
/* Pad out to 56 mod 64 */
if (count < 8) {
/* Two lots of padding: Pad the first block to 64 bytes */
memset(p, 0, count);
byteReverse(ctx->in, 16);
MD5Transform(ctx->buf, (u32 *) ctx->in);
/* Now fill the next block with 56 bytes */
memset(ctx->in, 0, 56);
} else {
/* Pad block to 56 bytes */
memset(p, 0, count - 8);
}
byteReverse(ctx->in, 14);
/* Append length in bits and transform */
((u32 *) ctx->in)[14] = ctx->bits[0];
((u32 *) ctx->in)[15] = ctx->bits[1];
MD5Transform(ctx->buf, (u32 *) ctx->in);
byteReverse((unsigned char *) ctx->buf, 4);
memcpy(digest, ctx->buf, 16);
memset((char *) ctx, 0, sizeof(ctx)); /* In case it's sensitive */
}
/* The four core functions - F1 is optimized somewhat */
/* #define F1(x, y, z) (x & y | ~x & z) */
#define F1(x, y, z) (z ^ (x & (y ^ z)))
#define F2(x, y, z) F1(z, x, y)
#define F3(x, y, z) (x ^ y ^ z)
#define F4(x, y, z) (y ^ (x | ~z))
/* This is the central step in the MD5 algorithm. */
#define MD5STEP(f, w, x, y, z, data, s) \
( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
/*
* The core of the MD5 algorithm, this alters an existing MD5 hash to
* reflect the addition of 16 longwords of new data. MD5Update blocks
* the data and converts bytes into longwords for this routine.
*/
void MD5Transform(u32 buf[4], u32 const in[16])
{
register u32 a, b, c, d;
a = buf[0];
b = buf[1];
c = buf[2];
d = buf[3];
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
buf[0] += a;
buf[1] += b;
buf[2] += c;
buf[3] += d;
}

16
lib/md5.h Normal file
View file

@ -0,0 +1,16 @@
#ifndef MD5_H
#define MD5_H
struct MD5Context {
u32 buf[4];
u32 bits[2];
unsigned char in[64];
};
void MD5Init(struct MD5Context *context);
void MD5Update(struct MD5Context *context, unsigned char const *buf,
unsigned len);
void MD5Final(unsigned char digest[16], struct MD5Context *context);
void MD5Transform(u32 buf[4], u32 const in[16]);
#endif /* !MD5_H */

133
lib/mempool.c Normal file
View file

@ -0,0 +1,133 @@
/*
* BIRD Resource Manager -- Memory Pools
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdlib.h>
#include <string.h>
#include "nest/bird.h"
#include "lib/resource.h"
struct mp_chunk {
struct mp_chunk *next;
byte data[0];
};
struct mempool {
resource r;
byte *ptr, *end;
struct mp_chunk *first, **plast;
unsigned chunk_size, threshold, total;
};
void mp_free(resource *);
void mp_dump(resource *);
struct resclass mp_class = {
"MemPool",
sizeof(struct mempool),
mp_free,
mp_dump
};
mempool
*mp_new(pool *p, unsigned blk)
{
mempool *m = ralloc(p, &mp_class);
m->ptr = m->end = NULL;
m->first = NULL;
m->plast = &m->first;
m->chunk_size = blk;
m->threshold = 3*blk/4;
m->total = 0;
return m;
}
void *
mp_alloc(mempool *m, unsigned size)
{
byte *a = (byte *) ALIGN((unsigned long) m->ptr, CPU_STRUCT_ALIGN);
byte *e = a + size;
if (e <= m->end)
{
m->ptr = e;
return a;
}
else
{
struct mp_chunk *c;
if (size >= m->threshold)
{
c = xmalloc(sizeof(struct mp_chunk) + size);
m->total += size;
}
else
{
c = xmalloc(sizeof(struct mp_chunk) + m->chunk_size);
m->ptr = c->data + size;
m->end = c->data + m->chunk_size;
m->total += m->chunk_size;
}
*m->plast = c;
m->plast = &c->next;
c->next = NULL;
return c->data;
}
}
void *
mp_allocu(mempool *m, unsigned size)
{
byte *a = m->ptr;
byte *e = a + size;
if (e <= m->end)
{
m->ptr = e;
return a;
}
return mp_alloc(m, size);
}
void *
mp_allocz(mempool *m, unsigned size)
{
void *z = mp_alloc(m, size);
bzero(z, size);
return z;
}
void
mp_free(resource *r)
{
mempool *m = (mempool *) r;
struct mp_chunk *c, *d;
for(d=m->first; d; d = c)
{
c = d->next;
xfree(d);
}
}
void
mp_dump(resource *r)
{
mempool *m = (mempool *) r;
struct mp_chunk *c;
int cnt;
for(cnt=0, c=m->first; c; c=c->next, cnt++)
;
debug("(chunk=%d threshold=%d count=%d total=%d)\n",
m->chunk_size,
m->threshold,
cnt,
m->total);
}

162
lib/resource.c Normal file
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@ -0,0 +1,162 @@
/*
* BIRD Resource Manager
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <stdlib.h>
#include "nest/bird.h"
#include "lib/resource.h"
struct pool {
resource r;
list inside;
};
void pool_dump(resource *);
void pool_free(resource *);
static struct resclass pool_class = {
"Pool",
sizeof(pool),
pool_free,
pool_dump
};
pool root_pool;
static int indent;
pool *
rp_new(pool *p)
{
pool *z = ralloc(p, &pool_class);
init_list(&z->inside);
return z;
}
void
pool_free(resource *P)
{
pool *p = (pool *) P;
resource *r, *rr;
r = HEAD(p->inside);
while (rr = (resource *) r->n.next)
{
r->class->free(r);
xfree(r);
r = rr;
}
}
void
pool_dump(resource *P)
{
pool *p = (pool *) P;
resource *r;
debug("\n");
indent += 3;
WALK_LIST(r, p->inside)
rdump(r);
indent -= 3;
}
void
rfree(void *res)
{
resource *r = res;
if (r)
{
if (r->n.next)
rem_node(&r->n);
r->class->free(r);
xfree(r);
}
}
void
rdump(void *res)
{
char x[16];
resource *r = res;
sprintf(x, "%%%ds%%08x ", indent);
debug(x, "", (int) r);
if (r)
{
debug("%-6s", r->class->name);
r->class->dump(r);
}
else
debug("NULL\n");
}
void *
ralloc(pool *p, struct resclass *c)
{
resource *r = xmalloc(c->size);
r->class = c;
add_tail(&p->inside, &r->n);
return r;
}
void
resource_init(void)
{
root_pool.r.class = &pool_class;
init_list(&root_pool.inside);
}
/*
* Memory blocks.
*/
struct mblock {
resource r;
unsigned size;
byte data[0];
};
void mbl_free(resource *r)
{
}
void mbl_debug(resource *r)
{
struct mblock *m = (struct mblock *) r;
debug("(size=%d)\n", m->size);
}
struct resclass mb_class = {
"Memory",
0,
mbl_free,
mbl_debug,
};
void *
mb_alloc(pool *p, unsigned size)
{
struct mblock *b = xmalloc(sizeof(struct mblock) + size);
b->r.class = &mb_class;
add_tail(&p->inside, &b->r.n);
b->size = size;
return b->data;
}
void
mb_free(void *m)
{
struct mblock *b = SKIP_BACK(struct mblock, data, m);
rfree(b);
}

11
lib/resource.h
View file

@ -31,25 +31,26 @@ struct resclass {
typedef struct pool pool;
void resource_init(void);
pool *rp_new(pool *); /* Create new pool */
void rp_init(pool *); /* Initialize static pool */
void rp_empty(pool *); /* Free everything in the pool */
void rp_free(pool *); /* Free everything in the pool */
void rfree(void *); /* Free single resource */
void rdump(void *); /* Dump to debug output */
void ralloc(pool *, struct resclass *);
void *ralloc(pool *, struct resclass *);
extern pool root_pool;
/* Normal memory blocks */
void *mb_alloc(pool *, unsigned size);
void *mb_free(void *);
void mb_free(void *);
/* Memory pools with linear allocation */
typedef struct mempool mempool;
mempool *mp_new(pool *, unsigned blk);
void mp_trim(pool *); /* Free unused memory */
void *mp_alloc(mempool *, unsigned size); /* Aligned */
void *mp_allocu(mempool *, unsigned size); /* Unaligned */
void *mp_allocz(mempool *, unsigned size); /* With clear */

87
lib/slab.c Normal file
View file

@ -0,0 +1,87 @@
/*
* BIRD Resource Manager -- SLABs
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdlib.h>
#include <string.h>
#include "nest/bird.h"
#include "lib/resource.h"
/*
* These are only fake, soon to change...
*/
struct sl_obj {
node n;
byte data[0];
};
struct slab {
resource r;
unsigned size;
list objs;
};
void slab_free(resource *r);
void slab_dump(resource *r);
struct resclass sl_class = {
"Slab",
sizeof(struct slab),
slab_free,
slab_dump
};
slab *
sl_new(pool *p, unsigned size)
{
slab *s = ralloc(p, &sl_class);
s->size = size;
init_list(&s->objs);
return s;
}
void *
sl_alloc(slab *s)
{
struct sl_obj *o = xmalloc(sizeof(struct sl_obj) + s->size);
add_tail(&s->objs, &o->n);
return o->data;
}
void
sl_free(slab *s, void *oo)
{
struct sl_obj *o = SKIP_BACK(struct sl_obj, data, oo);
rem_node(&o->n);
xfree(o);
}
void
slab_free(resource *r)
{
slab *s = (slab *) r;
struct sl_obj *o, *p;
for(o = HEAD(s->objs); p = (struct sl_obj *) o->n.next; o = p)
xfree(o);
}
void
slab_dump(resource *r)
{
slab *s = (slab *) r;
int cnt = 0;
struct sl_obj *o;
WALK_LIST(o, s->objs)
cnt++;
debug("(%d objects per %d bytes)\n", cnt, s->size);
}

21
lib/xmalloc.c Normal file
View file

@ -0,0 +1,21 @@
/*
* BIRD Library -- malloc() With Checking
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdlib.h>
#include "nest/bird.h"
#include "lib/resource.h"
void *
xmalloc(unsigned size)
{
void *p = malloc(size);
if (p)
return p;
die("Unable to allocate %d bytes of memory", size);
}

4
sysdep/config.h
View file

@ -47,4 +47,8 @@ typedef u16 word;
#define CONFIG_BGP
#define CONFIG_OSPF
/* Autodetected system features */
#define HAVE_SYSLOG
#endif