YAZ  5.23.1
ber_any.c
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1 /* This file is part of the YAZ toolkit.
2  * Copyright (C) Index Data
3  * See the file LICENSE for details.
4  */
5 
14 #if HAVE_CONFIG_H
15 #include <config.h>
16 #endif
17 
18 #include <assert.h>
19 #include "odr-priv.h"
20 
21 int ber_any(ODR o, Odr_any **p)
22 {
23  int res;
24 
25  switch (o->direction)
26  {
27  case ODR_DECODE:
28  if ((res = completeBER(o->op->bp, odr_max(o))) <= 0) /* FIX THIS */
29  {
30  odr_seterror(o, OPROTO, 2);
31  return 0;
32  }
33  (*p)->buf = (char *)odr_malloc(o, res);
34  memcpy((*p)->buf, o->op->bp, res);
35  (*p)->len = res;
36  o->op->bp += res;
37  return 1;
38  case ODR_ENCODE:
39  if (odr_write(o, (*p)->buf, (*p)->len) < 0)
40  return 0;
41  return 1;
42  default: odr_seterror(o, OOTHER, 3); return 0;
43  }
44 }
45 
46 #define BER_ANY_DEBUG 0
47 
48 int completeBER_n(const char *buf, int len, int level)
49 {
50  int res, ll, zclass, tag, cons;
51  const char *b = buf;
52 
53  if (level > 1000)
54  {
55 #if BER_ANY_DEBUG
56  yaz_log(YLOG_LOG, "completeBER lev=%d len=%d", level, len);
57 #endif
58  return -2;
59  }
60  if (len < 2)
61  return 0;
62  if (!buf[0] && !buf[1])
63  return -2;
64  if ((res = ber_dectag(b, &zclass, &tag, &cons, len)) <= 0)
65  return 0;
66  b += res;
67  len -= res;
68  assert (len >= 0);
69  res = ber_declen(b, &ll, len);
70  if (res == -2)
71  {
72 #if BER_ANY_DEBUG
73  yaz_log(YLOG_LOG, "<<<<<<<<< return1 lev=%d res=%d", level, res);
74 #endif
75  return -1; /* error */
76  }
77  if (res == -1)
78  {
79 #if BER_ANY_DEBUG
80  yaz_log(YLOG_LOG, "<<<<<<<<< return2 lev=%d res=%d", level, res);
81 #endif
82  return 0; /* incomplete length */
83  }
84  b += res;
85  len -= res;
86  if (ll >= 0)
87  { /* definite length */
88  if (len < ll)
89  {
90 #if BER_ANY_DEBUG
91  yaz_log(YLOG_LOG, "<<<<<<<<< return5 lev=%d len=%d ll=%d",
92  level, len, ll);
93 #endif
94  return 0;
95  }
96  return ll + (b-buf);
97  }
98  /* indefinite length */
99  if (!cons)
100  { /* if primitive, it's an error */
101 #if BER_ANY_DEBUG
102  yaz_log(YLOG_LOG, "<<<<<<<<< return6 lev=%d ll=%d len=%d res=%d",
103  level, ll, len, res);
104 #endif
105  return -1; /* error */
106  }
107  /* constructed - cycle through children */
108  while (len >= 2)
109  {
110  if (b[0] == 0 && b[1] == 0)
111  break;
112  res = completeBER_n(b, len, level+1);
113  if (res <= 0)
114  return res;
115  b += res;
116  len -= res;
117  }
118  if (len < 2)
119  return 0;
120  return (b - buf) + 2;
121 }
122 
123 int completeBER(const char *buf, int len)
124 {
125  int res = completeBER_n(buf, len, 0);
126 #if BER_ANY_DEBUG
127  yaz_log(YLOG_LOG, "completeBER len=%d res=%d", len, res);
128 #endif
129  if (res < 0)
130  return len;
131  return res;
132 }
133 /*
134  * Local variables:
135  * c-basic-offset: 4
136  * c-file-style: "Stroustrup"
137  * indent-tabs-mode: nil
138  * End:
139  * vim: shiftwidth=4 tabstop=8 expandtab
140  */
141 
void odr_seterror(ODR o, int error, int id)
Definition: odr.c:118
int completeBER_n(const char *buf, int len, int level)
Definition: ber_any.c:48
int completeBER(const char *buf, int len)
determine whether a buffer is a complete BER buffer
Definition: ber_any.c:123
int ber_declen(const char *buf, int *len, int max)
Definition: ber_len.c:93
#define OOTHER
Definition: odr.h:156
#define ODR_ENCODE
Definition: odr.h:96
#define YLOG_LOG
log level: log (regular)
Definition: log.h:48
void * odr_malloc(ODR o, size_t size)
Definition: odr_mem.c:31
Internal ODR definitions.
int direction
Definition: odr.h:126
#define OPROTO
Definition: odr.h:157
#define odr_max(o)
Definition: odr-priv.h:47
Definition: odr.h:99
struct Odr_private * op
Definition: odr.h:132
const char * bp
Definition: odr-priv.h:85
Definition: odr.h:124
int ber_dectag(const char *cp, int *zclass, int *tag, int *constructed, int max)
Decodes BER identifier octets.
Definition: ber_tag.c:165
int ber_any(ODR o, Odr_any **p)
Definition: ber_any.c:21
void yaz_log(int level, const char *fmt,...)
Writes log message.
Definition: log.c:485
int odr_write(ODR o, const char *buf, int bytes)
Definition: odr_mem.c:98
#define ODR_DECODE
Definition: odr.h:95