1 |
root |
1.1 |
#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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// C99 required |
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root |
1.4 |
#define ASN_BOOLEAN 0x01 |
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#define ASN_INTEGER32 0x02 |
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#define ASN_OCTET_STRING 0x04 |
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#define ASN_NULL 0x05 |
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#define ASN_OBJECT_IDENTIFIER 0x06 |
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#define ASN_SEQUENCE 0x30 |
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#define ASN_IPADDRESS 0x40 |
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#define ASN_COUNTER32 0x41 |
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#define ASN_UNSIGNED32 0x42 |
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#define ASN_TIMETICKS 0x43 |
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#define ASN_OPAQUE 0x44 |
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#define ASN_COUNTER64 0x46 |
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root |
1.1 |
|
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root |
1.3 |
#define BENCHMARK |
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root |
1.1 |
|
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root |
1.4 |
#define MAX_OID_STRLEN 4096 |
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root |
1.1 |
static SV *msg; |
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root |
1.4 |
static int errflag, leading_dot; |
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root |
1.1 |
static U8 *buf, *cur; |
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static STRLEN len, rem; |
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root |
1.3 |
static SV * |
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x_get_cv (SV *cb_sv) |
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{ |
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HV *st; |
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GV *gvp; |
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CV *cv = sv_2cv (cb_sv, &st, &gvp, 0); |
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if (!cv) |
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croak ("CODE reference expected"); |
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return (SV *)cv; |
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} |
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root |
1.1 |
static void |
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error (const char *msg) |
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{ |
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errflag = 1; |
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printf ("<<<%s>>>\n", msg);//D |
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} |
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static int |
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need (int count) |
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{ |
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if (count < 0 || (int)rem < count) |
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{ |
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error ("Unexpected end of message buffer"); |
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return 0; |
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} |
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return 1; |
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} |
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static U8 * |
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getn (int count, const U8 *errres) |
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{ |
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if (!need (count)) |
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return (U8 *)errres; |
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U8 *res = cur; |
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cur += count; |
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rem -= count; |
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return res; |
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} |
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static U8 |
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get8 (void) |
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{ |
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if (rem <= 0) |
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{ |
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error ("Unexpected end of message buffer"); |
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return 0; |
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} |
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rem--; |
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return *cur++; |
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} |
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static U32 |
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getb (void) |
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{ |
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U32 res = 0; |
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94 |
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for (;;) |
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{ |
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U8 c = get8 (); |
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res = (res << 7) | (c & 0x7f); |
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if (!(c & 0x80)) |
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return res; |
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} |
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} |
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104 |
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#ifdef BENCHMARK |
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static double t1; |
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107 |
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static double |
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tstamp (void) |
109 |
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{ |
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struct timeval tv; |
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gettimeofday (&tv, 0); |
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return tv.tv_sec + tv.tv_usec * 0.000001; |
113 |
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} |
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#endif |
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static U32 |
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process_length (void) |
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{ |
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U32 res = get8 (); |
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121 |
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if (res & 0x80) |
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{ |
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int cnt = res & 0x7f; |
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res = 0; |
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switch (cnt) |
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{ |
128 |
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case 0: |
129 |
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error ("Indefinite ASN.1 lengths not supported"); |
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return 0; |
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132 |
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default: |
133 |
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error ("ASN.1 length too long"); |
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return 0; |
135 |
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136 |
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case 4: res = (res << 8) | get8 (); |
137 |
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case 3: res = (res << 8) | get8 (); |
138 |
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case 2: res = (res << 8) | get8 (); |
139 |
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case 1: res = (res << 8) | get8 (); |
140 |
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} |
141 |
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} |
142 |
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143 |
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return res; |
144 |
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} |
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146 |
root |
1.4 |
static U32 |
147 |
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process_integer32 (void) |
148 |
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{ |
149 |
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U32 length = process_length (); |
150 |
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151 |
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if (length <= 0) |
152 |
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{ |
153 |
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error ("INTEGER32 length equal to zero"); |
154 |
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return 0; |
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} |
156 |
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157 |
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U8 *data = getn (length, 0); |
158 |
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159 |
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if (!data) |
160 |
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return 0; |
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162 |
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if (length > 5 || (length > 4 && data [0])) |
163 |
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{ |
164 |
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error ("INTEGER32 length too long"); |
165 |
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return 0; |
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} |
167 |
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168 |
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U32 res = data [0] & 0x80 ? 0xffffffff : 0; |
169 |
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170 |
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while (length--) |
171 |
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res = (res << 8) | *data++; |
172 |
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173 |
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return res; |
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} |
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176 |
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static SV * |
177 |
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process_integer32_sv (void) |
178 |
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{ |
179 |
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return newSViv ((I32)process_integer32 ()); |
180 |
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} |
181 |
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182 |
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static SV * |
183 |
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process_unsigned32_sv (void) |
184 |
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{ |
185 |
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return newSVuv ((U32)process_integer32 ()); |
186 |
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} |
187 |
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188 |
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static SV * |
189 |
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process_octet_string_sv (void) |
190 |
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{ |
191 |
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U32 length = process_length (); |
192 |
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193 |
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U8 *data = getn (length, 0); |
194 |
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if (!data) |
195 |
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{ |
196 |
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error ("OCTET STRING too long"); |
197 |
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return &PL_sv_undef; |
198 |
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} |
199 |
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200 |
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return newSVpvn (data, length); |
201 |
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} |
202 |
root |
1.5 |
|
203 |
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static char * |
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write_uv (char *buf, U32 u) |
205 |
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{ |
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// the one-digit case is absolutely predominant |
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if (u < 10) |
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*buf++ = u + '0'; |
209 |
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else |
210 |
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buf += sprintf (buf, "%u", (unsigned int)u); |
211 |
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212 |
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return buf; |
213 |
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} |
214 |
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215 |
root |
1.4 |
static SV * |
216 |
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process_object_identifier_sv (void) |
217 |
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{ |
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U32 length = process_length (); |
219 |
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220 |
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if (length <= 0) |
221 |
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{ |
222 |
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error ("OBJECT IDENTIFIER length equal to zero"); |
223 |
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return &PL_sv_undef; |
224 |
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} |
225 |
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226 |
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U8 *end = cur + length; |
227 |
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U32 w = getb (); |
228 |
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229 |
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static char oid[MAX_OID_STRLEN]; |
230 |
root |
1.5 |
char *app = oid; |
231 |
root |
1.4 |
|
232 |
root |
1.5 |
*app = '.'; app += ! ! leading_dot; |
233 |
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app = write_uv (app, w / 40); |
234 |
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*app++ = '.'; |
235 |
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app = write_uv (app, w % 40); |
236 |
root |
1.4 |
|
237 |
root |
1.5 |
// we assume an oid component is never > 64 bytes |
238 |
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while (cur < end && oid + sizeof (oid) - app > 64) |
239 |
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{ |
240 |
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w = getb (); |
241 |
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*app++ = '.'; |
242 |
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app = write_uv (app, w); |
243 |
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} |
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#if 0 |
245 |
root |
1.4 |
buf += snprintf (buf, oid + sizeof (oid) - buf, "%d.%d", (int)w / 40, (int)w % 40); |
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247 |
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while (cur < end) |
248 |
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{ |
249 |
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w = getb (); |
250 |
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buf += snprintf (buf, oid + sizeof (oid) - buf, ".%u", (unsigned int)w); |
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} |
252 |
root |
1.5 |
#endif |
253 |
root |
1.4 |
|
254 |
root |
1.5 |
return newSVpvn (oid, app - oid); |
255 |
root |
1.4 |
} |
256 |
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257 |
root |
1.3 |
static AV *av_type; |
258 |
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259 |
root |
1.1 |
MODULE = Net::SNMP::XS PACKAGE = Net::SNMP::XS |
260 |
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261 |
root |
1.3 |
PROTOTYPES: ENABLE |
262 |
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263 |
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BOOT: |
264 |
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av_type = newAV (); |
265 |
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266 |
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void |
267 |
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set_type (int type, SV *cv) |
268 |
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CODE: |
269 |
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av_store (av_type, type, SvREFCNT_inc (x_get_cv (cv))); |
270 |
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271 |
root |
1.1 |
void |
272 |
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set_msg (SV *msg_, SV *buf_) |
273 |
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CODE: |
274 |
root |
1.4 |
errflag = 0; |
275 |
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leading_dot = -1; |
276 |
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msg = SvREFCNT_inc (msg_); |
277 |
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buf = SvPVbyte (buf_, len); |
278 |
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cur = buf; |
279 |
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rem = len; |
280 |
root |
1.2 |
#ifdef BENCHMARK |
281 |
root |
1.4 |
t1 = tstamp (); |
282 |
root |
1.2 |
#endif |
283 |
root |
1.1 |
|
284 |
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void |
285 |
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clr_msg () |
286 |
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CODE: |
287 |
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SvREFCNT_dec (msg); |
288 |
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buf = cur = ""; |
289 |
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len = rem = 0; |
290 |
root |
1.2 |
#ifdef BENCHMARK |
291 |
root |
1.1 |
printf ("%f\n", tstamp () - t1);//D |
292 |
root |
1.2 |
#endif |
293 |
root |
1.1 |
|
294 |
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MODULE = Net::SNMP::XS PACKAGE = Net::SNMP::Message |
295 |
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296 |
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void |
297 |
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_buffer_get (SV *self, int count = -1) |
298 |
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PPCODE: |
299 |
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{ |
300 |
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// grrr. |
301 |
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if (count < 0) |
302 |
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{ |
303 |
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hv_delete ((HV *)SvRV (self), "_index" , 6, G_DISCARD); |
304 |
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hv_delete ((HV *)SvRV (self), "_length", 7, G_DISCARD); |
305 |
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SV **svp = hv_fetch ((HV *)SvRV (self), "_buffer", 7, 1); |
306 |
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XPUSHs (sv_2mortal (newSVsv (*svp))); |
307 |
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sv_setpvn (*svp, "", 0); |
308 |
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XSRETURN (1); |
309 |
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} |
310 |
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311 |
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char *data = getn (count, 0); |
312 |
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313 |
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if (data) |
314 |
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XPUSHs (sv_2mortal (newSVpvn (data, count))); |
315 |
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} |
316 |
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317 |
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U32 |
318 |
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index (SV *self, int ndx = -1) |
319 |
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CODE: |
320 |
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{ |
321 |
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if (ndx >= 0 && ndx < len) |
322 |
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{ |
323 |
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cur = buf + ndx; |
324 |
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rem = len - ndx; |
325 |
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} |
326 |
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327 |
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RETVAL = cur - buf; |
328 |
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} |
329 |
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OUTPUT: |
330 |
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RETVAL |
331 |
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332 |
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U32 |
333 |
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_process_length (SV *self, ...) |
334 |
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ALIAS: |
335 |
root |
1.3 |
_process_sequence = 0 |
336 |
root |
1.1 |
CODE: |
337 |
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RETVAL = process_length (); |
338 |
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OUTPUT: |
339 |
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RETVAL |
340 |
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|
341 |
root |
1.4 |
SV * |
342 |
root |
1.1 |
_process_integer32 (SV *self, ...) |
343 |
root |
1.4 |
CODE: |
344 |
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RETVAL = process_integer32_sv (); |
345 |
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OUTPUT: |
346 |
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RETVAL |
347 |
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|
348 |
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SV * |
349 |
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_process_counter (SV *self, ...) |
350 |
root |
1.1 |
ALIAS: |
351 |
root |
1.4 |
_process_gauge = 0 |
352 |
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_process_timeticks = 0 |
353 |
root |
1.1 |
CODE: |
354 |
root |
1.4 |
RETVAL = process_unsigned32_sv (); |
355 |
root |
1.1 |
OUTPUT: |
356 |
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RETVAL |
357 |
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|
358 |
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SV * |
359 |
|
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_process_object_identifier (SV *self, ...) |
360 |
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CODE: |
361 |
root |
1.4 |
RETVAL = process_object_identifier_sv (); |
362 |
root |
1.1 |
OUTPUT: |
363 |
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RETVAL |
364 |
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|
365 |
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SV * |
366 |
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_process_octet_string (SV *self, ...) |
367 |
|
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ALIAS: |
368 |
|
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_process_opaque = 0 |
369 |
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CODE: |
370 |
root |
1.4 |
RETVAL = process_octet_string_sv (); |
371 |
root |
1.1 |
OUTPUT: |
372 |
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RETVAL |
373 |
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|
374 |
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SV * |
375 |
|
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_process_ipaddress (SV *self, ...) |
376 |
|
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CODE: |
377 |
|
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{ |
378 |
|
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U32 length = process_length (); |
379 |
|
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if (length != 4) |
380 |
|
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{ |
381 |
|
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error ("IP ADDRESS length not four"); |
382 |
|
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XSRETURN_UNDEF; |
383 |
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} |
384 |
|
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|
385 |
|
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U8 *data = getn (4, "\x00\x00\x00\x00"); |
386 |
|
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RETVAL = newSVpvf ("%d.%d.%d.%d", data [0], data [1], data [2], data [3]); |
387 |
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} |
388 |
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OUTPUT: |
389 |
|
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RETVAL |
390 |
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|
391 |
root |
1.3 |
SV * |
392 |
|
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process (SV *self, SV *expected = 0, SV *found = 0) |
393 |
|
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PPCODE: |
394 |
|
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{ |
395 |
|
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U8 type = get8 (); |
396 |
|
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|
397 |
|
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if (expected && SvOK (expected) && type != SvIV (expected)) |
398 |
|
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{ |
399 |
|
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error ("Expected a different type than found"); |
400 |
|
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XSRETURN_UNDEF; |
401 |
|
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} |
402 |
|
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|
403 |
|
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if (type > AvFILLp (av_type) || !SvTYPE (AvARRAY (av_type)[type]) == SVt_PVCV) |
404 |
|
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{ |
405 |
|
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sv_dump (AvARRAY (av_type)[type]);//D |
406 |
|
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error ("Unknown ASN.1 type"); |
407 |
|
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XSRETURN_UNDEF; |
408 |
|
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} |
409 |
|
|
|
410 |
|
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if (found) |
411 |
|
|
sv_setiv (found, type); |
412 |
|
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|
413 |
root |
1.4 |
//TODO: switch based on type, to avoid calling overhead |
414 |
root |
1.3 |
SV *res; |
415 |
|
|
|
416 |
root |
1.4 |
switch (type) |
417 |
|
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{ |
418 |
|
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case ASN_OBJECT_IDENTIFIER: |
419 |
|
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res = sv_2mortal (process_object_identifier_sv ()); |
420 |
|
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break; |
421 |
|
|
|
422 |
|
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case ASN_INTEGER32: |
423 |
|
|
res = sv_2mortal (process_integer32_sv ()); |
424 |
|
|
break; |
425 |
|
|
|
426 |
|
|
case ASN_UNSIGNED32: |
427 |
|
|
case ASN_COUNTER32: |
428 |
|
|
case ASN_TIMETICKS: |
429 |
|
|
res = sv_2mortal (process_unsigned32_sv ()); |
430 |
|
|
break; |
431 |
|
|
|
432 |
|
|
case ASN_SEQUENCE: |
433 |
|
|
res = sv_2mortal (newSVuv (process_length ())); |
434 |
|
|
break; |
435 |
|
|
|
436 |
|
|
case ASN_OCTET_STRING: |
437 |
|
|
case ASN_OPAQUE: |
438 |
|
|
res = sv_2mortal (process_octet_string_sv ()); |
439 |
|
|
break; |
440 |
|
|
|
441 |
|
|
default: |
442 |
|
|
{ |
443 |
|
|
dSP; |
444 |
|
|
PUSHMARK (SP); |
445 |
|
|
EXTEND (SP, 2); |
446 |
|
|
PUSHs (self); |
447 |
|
|
PUSHs (expected); |
448 |
|
|
PUTBACK; |
449 |
|
|
int count = call_sv (AvARRAY (av_type)[type], G_SCALAR); |
450 |
|
|
SPAGAIN; |
451 |
|
|
res = count ? TOPs : &PL_sv_undef; |
452 |
|
|
} |
453 |
|
|
} |
454 |
|
|
|
455 |
|
|
XPUSHs (errflag ? &PL_sv_undef : res); |
456 |
|
|
} |
457 |
|
|
|
458 |
|
|
#if 0 |
459 |
|
|
|
460 |
|
|
MODULE = Net::SNMP::XS PACKAGE = Net::SNMP::PDU |
461 |
|
|
|
462 |
|
|
SV * |
463 |
|
|
_process_var_bind_list (SV *self) |
464 |
|
|
CODE: |
465 |
|
|
{ |
466 |
|
|
# VarBindList::=SEQUENCE |
467 |
|
|
if (!defined($value = $this->process(SEQUENCE))) { |
468 |
|
|
return $this->_error; |
469 |
|
|
} |
470 |
|
|
|
471 |
|
|
# Using the length of the VarBindList SEQUENCE, |
472 |
|
|
# calculate the end index. |
473 |
|
|
|
474 |
|
|
my $end = $this->index + $value; |
475 |
|
|
|
476 |
|
|
$this->{_var_bind_list} = {}; |
477 |
|
|
$this->{_var_bind_names} = []; |
478 |
|
|
$this->{_var_bind_types} = {}; |
479 |
|
|
|
480 |
|
|
my ($oid, $type); |
481 |
|
|
|
482 |
|
|
while ($this->index < $end) { |
483 |
|
|
|
484 |
|
|
# VarBind::=SEQUENCE |
485 |
|
|
if (!defined($this->process(SEQUENCE))) { |
486 |
|
|
return $this->_error; |
487 |
|
|
} |
488 |
|
|
# name::=ObjectName |
489 |
|
|
if (!defined($oid = $this->process(OBJECT_IDENTIFIER))) { |
490 |
|
|
return $this->_error; |
491 |
|
|
} |
492 |
|
|
# value::=ObjectSyntax |
493 |
|
|
if (!defined($value = $this->process(undef, $type))) { |
494 |
|
|
return $this->_error; |
495 |
|
|
} |
496 |
|
|
|
497 |
|
|
# Create a hash consisting of the OBJECT IDENTIFIER as a |
498 |
|
|
# key and the ObjectSyntax as the value. If there is a |
499 |
|
|
# duplicate OBJECT IDENTIFIER in the VarBindList, we pad |
500 |
|
|
# that OBJECT IDENTIFIER with spaces to make a unique |
501 |
|
|
# key in the hash. |
502 |
|
|
|
503 |
|
|
while (exists($this->{_var_bind_list}->{$oid})) { |
504 |
|
|
$oid .= ' '; # Pad with spaces |
505 |
|
|
} |
506 |
|
|
|
507 |
|
|
DEBUG_INFO('{ %s => %s: %s }', $oid, asn1_itoa($type), $value); |
508 |
|
|
$this->{_var_bind_list}->{$oid} = $value; |
509 |
|
|
$this->{_var_bind_types}->{$oid} = $type; |
510 |
|
|
|
511 |
|
|
# Create an array with the ObjectName OBJECT IDENTIFIERs |
512 |
|
|
# so that the order in which the VarBinds where encoded |
513 |
|
|
# in the PDU can be retrieved later. |
514 |
|
|
|
515 |
|
|
push(@{$this->{_var_bind_names}}, $oid); |
516 |
|
|
|
517 |
root |
1.3 |
} |
518 |
root |
1.4 |
|
519 |
|
|
# Return an error based on the contents of the VarBindList |
520 |
|
|
# if we received a Report-PDU. |
521 |
|
|
|
522 |
|
|
return $this->_report_pdu_error if ($this->{_pdu_type} == REPORT); |
523 |
|
|
|
524 |
|
|
# Return the var_bind_list hash |
525 |
|
|
$this->{_var_bind_list}; |
526 |
|
|
} |
527 |
root |
1.3 |
|
528 |
root |
1.4 |
#endif |
529 |
root |
1.3 |
|