1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* BIRD Library
*
* (c) 1998--2004 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_BIRDLIB_H_
#define _BIRD_BIRDLIB_H_
#include "lib/alloca.h"
/* Ugly structure offset handling macros */
struct align_probe { char x; long int y; };
#define OFFSETOF(s, i) ((size_t) &((s *)0)->i)
#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
#define BIRD_ALIGN(s, a) (((s)+a-1)&~(a-1))
#define CPU_STRUCT_ALIGN (sizeof(struct align_probe))
/* Utility macros */
#define MIN_(a,b) (((a)<(b))?(a):(b))
#define MAX_(a,b) (((a)>(b))?(a):(b))
#ifndef PARSER
#undef MIN
#undef MAX
#define MIN(a,b) MIN_(a,b)
#define MAX(a,b) MAX_(a,b)
#endif
#define U64(c) UINT64_C(c)
#define ABS(a) ((a)>=0 ? (a) : -(a))
#define DELTA(a,b) (((a)>=(b))?(a)-(b):(b)-(a))
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
#define BYTES(n) ((((uint) (n)) + 7) / 8)
#define CALL(fn, args...) ({ if (fn) fn(args); })
#define ADVANCE(w, r, l) ({ r -= (l); w += (l); })
static inline int uint_cmp(uint i1, uint i2)
{ return (int)(i1 > i2) - (int)(i1 < i2); }
static inline int u64_cmp(u64 i1, u64 i2)
{ return (int)(i1 > i2) - (int)(i1 < i2); }
/* Bitfield macros */
/* b is u32 array (or ptr), l is size of it in bits (multiple of 32), p is 0..(l-1) */
#define BIT32_VAL(p) (((u32) 1) << ((p) % 32))
#define BIT32_TEST(b,p) ((b)[(p)/32] & BIT32_VAL(p))
#define BIT32_SET(b,p) ((b)[(p)/32] |= BIT32_VAL(p))
#define BIT32_CLR(b,p) ((b)[(p)/32] &= ~BIT32_VAL(p))
#define BIT32_ZERO(b,l) memset((b), 0, (l)/8)
/* The same, but counting bits from MSB */
#define BIT32R_VAL(p) ((((u32) 1) << 31) >> ((p) % 32))
#define BIT32R_TEST(b,p) ((b)[(p)/32] & BIT32R_VAL(p))
#define BIT32R_SET(b,p) ((b)[(p)/32] |= BIT32R_VAL(p))
#define BIT32R_CLR(b,p) ((b)[(p)/32] &= ~BIT32R_VAL(p))
#define BIT32R_ZERO(b,l) memset((b), 0, (l)/8)
#ifndef NULL
#define NULL ((void *) 0)
#endif
/* Macros for gcc attributes */
#define NORET __attribute__((noreturn))
#define UNUSED __attribute__((unused))
#define PACKED __attribute__((packed))
#ifndef HAVE_THREAD_LOCAL
#define _Thread_local
#endif
/* Microsecond time */
typedef s64 btime;
//typedef s64 bird_clock_t;
#define S_ * (btime) 1000000
#define MS_ * (btime) 1000
#define US_ * (btime) 1
#define TO_S /1000000
#define TO_MS /1000
#define TO_US /1
#ifndef PARSER
#define S S_
#define MS MS_
#define US US_
#define NS /1000
#endif
#define TIME_INFINITY ((s64) 0x7fffffffffffffff)
/* Rate limiting */
struct tbf {
btime timestamp; /* Last update */
u64 count; /* Available micro-tokens */
u16 burst; /* Max number of tokens */
u16 rate; /* Rate of replenishment (tokens / sec) */
u32 drop; /* Number of failed request since last successful */
};
/* Default TBF values for rate limiting log messages */
#define TBF_DEFAULT_LOG_LIMITS { .rate = 1, .burst = 5 }
int tbf_limit(struct tbf *f);
/* Logging and dying */
typedef struct buffer {
byte *start;
byte *pos;
byte *end;
} buffer;
#define STACK_BUFFER_INIT(buf,size) \
do { \
buf.start = alloca(size); \
buf.pos = buf.start; \
buf.end = buf.start + size; \
} while(0)
#define LOG_BUFFER_INIT(buf) \
STACK_BUFFER_INIT(buf, LOG_BUFFER_SIZE)
#define LOG_BUFFER_SIZE 1024
#define log log_msg
void log_commit(int class, buffer *buf);
void log_msg(const char *msg, ...);
void log_rl(struct tbf *rl, const char *msg, ...);
void die(const char *msg, ...) NORET;
void bug(const char *msg, ...) NORET;
#define L_DEBUG "\001" /* Debugging messages */
#define L_TRACE "\002" /* Protocol tracing */
#define L_INFO "\003" /* Informational messages */
#define L_REMOTE "\004" /* Remote protocol errors */
#define L_WARN "\005" /* Local warnings */
#define L_ERR "\006" /* Local errors */
#define L_AUTH "\007" /* Authorization failed etc. */
#define L_FATAL "\010" /* Fatal errors */
#define L_BUG "\011" /* BIRD bugs */
void debug(const char *msg, ...); /* Printf to debug output */
/* Debugging */
#if defined(LOCAL_DEBUG) || defined(GLOBAL_DEBUG)
#define DBG(x, y...) debug(x, ##y)
#else
#define DBG(x, y...) do { } while(0)
#endif
#define ASSERT_DIE(x) do { if (!(x)) bug("Assertion '%s' failed at %s:%d", #x, __FILE__, __LINE__); } while(0)
#ifdef DEBUGGING
#define ASSERT(x) ASSERT_DIE(x)
#define ASSUME(x) ASSERT_DIE(x)
#else
#define ASSERT(x) do { if (!(x)) log(L_BUG "Assertion '%s' failed at %s:%d", #x, __FILE__, __LINE__); } while(0)
#define ASSUME(x) /* intentionally left blank */
#endif
#ifdef DEBUGGING
asm(
".pushsection \".debug_gdb_scripts\", \"MS\",@progbits,1\n"
".byte 1\n" /* Python */
".asciz \"bird-gdb.py\"\n"
".popsection\n"
);
#endif
/* Pseudorandom numbers */
u32 random_u32(void);
#endif
|
