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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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// C99 required |
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|
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#define ASN_BOOLEAN 0x01 |
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#define ASN_INTEGER 0x02 |
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#define ASN_BIT_STR 0x03 |
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#define ASN_OCTET_STR 0x04 |
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#define ASN_NULL 0x05 |
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#define ASN_OBJECT_ID 0x06 |
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#define ASN_SEQUENCE 0x10 |
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#define ASN_SET 0x11 |
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|
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#define ASN_UNIVERSAL 0x00 |
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#define ASN_APPLICATION 0x40 |
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#define ASN_CONTEXT 0x80 |
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#define ASN_PRIVATE 0xc0 |
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|
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#define ASN_PRIMITIVE 0x00 |
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#define ASN_CONSTRUCTOR 0x20 |
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|
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#define ASN_LONG_LEN 0x80 |
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#define ASN_EXTENSION_ID 0x1f |
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#define ASN_BIT8 0x80 |
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|
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#define BENCHMARK |
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|
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static SV *msg; |
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static int errflag; |
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static U8 *buf, *cur; |
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static STRLEN len, rem; |
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|
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static void |
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error (const char *msg) |
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{ |
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errflag = 1; |
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|
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printf ("<<<%s>>>\n", msg);//D |
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} |
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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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|
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return 1; |
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} |
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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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|
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U8 *res = cur; |
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|
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cur += count; |
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rem -= count; |
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|
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return res; |
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} |
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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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|
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rem--; |
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return *cur++; |
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} |
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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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|
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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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|
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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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|
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#ifdef BENCHMARK |
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static double t1; |
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|
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static double |
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tstamp (void) |
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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; |
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} |
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#endif |
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|
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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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|
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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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|
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switch (cnt) |
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{ |
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case 0: |
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error ("Indefinite ASN.1 lengths not supported"); |
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return 0; |
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|
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default: |
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error ("ASN.1 length too long"); |
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return 0; |
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|
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case 4: res = (res << 8) | get8 (); |
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case 3: res = (res << 8) | get8 (); |
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case 2: res = (res << 8) | get8 (); |
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case 1: res = (res << 8) | get8 (); |
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} |
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} |
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|
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return res; |
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} |
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|
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MODULE = Net::SNMP::XS PACKAGE = Net::SNMP::XS |
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|
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void |
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set_msg (SV *msg_, SV *buf_) |
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CODE: |
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errflag = 0; |
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msg = SvREFCNT_inc (msg_); |
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buf = SvPVbyte (buf_, len); |
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cur = buf; |
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rem = len; |
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#ifdef BENCHMARK |
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t1 = tstamp (); |
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#endif |
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|
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void |
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clr_msg () |
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CODE: |
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SvREFCNT_dec (msg); |
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buf = cur = ""; |
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len = rem = 0; |
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#ifdef BENCHMARK |
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printf ("%f\n", tstamp () - t1);//D |
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#endif |
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|
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MODULE = Net::SNMP::XS PACKAGE = Net::SNMP::Message |
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|
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void |
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_buffer_get (SV *self, int count = -1) |
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PPCODE: |
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{ |
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// grrr. |
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if (count < 0) |
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{ |
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hv_delete ((HV *)SvRV (self), "_index" , 6, G_DISCARD); |
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hv_delete ((HV *)SvRV (self), "_length", 7, G_DISCARD); |
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SV **svp = hv_fetch ((HV *)SvRV (self), "_buffer", 7, 1); |
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XPUSHs (sv_2mortal (newSVsv (*svp))); |
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sv_setpvn (*svp, "", 0); |
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XSRETURN (1); |
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} |
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|
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char *data = getn (count, 0); |
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|
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if (data) |
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XPUSHs (sv_2mortal (newSVpvn (data, count))); |
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} |
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|
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U32 |
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index (SV *self, int ndx = -1) |
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CODE: |
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{ |
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if (ndx >= 0 && ndx < len) |
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{ |
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cur = buf + ndx; |
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rem = len - ndx; |
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} |
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|
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RETVAL = cur - buf; |
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} |
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OUTPUT: |
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RETVAL |
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|
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U32 |
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_process_length (SV *self, ...) |
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ALIAS: |
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_process_sequence = 1 |
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CODE: |
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RETVAL = process_length (); |
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OUTPUT: |
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RETVAL |
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|
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I32 |
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_process_integer32 (SV *self, ...) |
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ALIAS: |
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_process_counter = 0 |
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_process_gauge = 0 |
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CODE: |
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{ |
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U32 length = process_length (); |
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|
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if (length <= 0) |
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{ |
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error ("INTEGER32 length equal to zero"); |
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XSRETURN_UNDEF; |
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} |
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|
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U8 *data = getn (length, 0); |
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|
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if (!data) |
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XSRETURN_UNDEF; |
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|
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if (length > 5 || (length > 4 && data [0])) |
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{ |
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error ("INTEGER32 length too long"); |
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XSRETURN_UNDEF; |
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} |
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|
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U32 res = data [0] & 0x80 ? 0xffffffff : 0; |
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|
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while (length--) |
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res = (res << 8) | *data++; |
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|
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RETVAL = res; |
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} |
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OUTPUT: |
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RETVAL |
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|
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SV * |
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_process_object_identifier (SV *self, ...) |
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CODE: |
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{ |
| 250 |
U32 length = process_length (); |
| 251 |
|
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if (length <= 0) |
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{ |
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error ("OBJECT IDENTIFIER length equal to zero"); |
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XSRETURN_UNDEF; |
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} |
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|
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U8 *end = cur + length; |
| 259 |
U32 w = getb (); |
| 260 |
|
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//TODO: leading_dots |
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|
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RETVAL = newSVpvf (".%d.%d", (int)w / 40, (int)w % 40); |
| 264 |
|
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while (cur < end) |
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{ |
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w = getb (); |
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sv_catpvf (RETVAL, ".%u", (unsigned int)w); |
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} |
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} |
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OUTPUT: |
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RETVAL |
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|
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SV * |
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_process_octet_string (SV *self, ...) |
| 276 |
ALIAS: |
| 277 |
_process_opaque = 0 |
| 278 |
CODE: |
| 279 |
{ |
| 280 |
U32 length = process_length (); |
| 281 |
|
| 282 |
U8 *data = getn (length, 0); |
| 283 |
if (!data) |
| 284 |
{ |
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error ("OCTET STRING too long"); |
| 286 |
XSRETURN_UNDEF; |
| 287 |
} |
| 288 |
|
| 289 |
RETVAL = newSVpvn (data, length); |
| 290 |
} |
| 291 |
OUTPUT: |
| 292 |
RETVAL |
| 293 |
|
| 294 |
SV * |
| 295 |
_process_ipaddress (SV *self, ...) |
| 296 |
CODE: |
| 297 |
{ |
| 298 |
U32 length = process_length (); |
| 299 |
if (length != 4) |
| 300 |
{ |
| 301 |
error ("IP ADDRESS length not four"); |
| 302 |
XSRETURN_UNDEF; |
| 303 |
} |
| 304 |
|
| 305 |
U8 *data = getn (4, "\x00\x00\x00\x00"); |
| 306 |
RETVAL = newSVpvf ("%d.%d.%d.%d", data [0], data [1], data [2], data [3]); |
| 307 |
} |
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OUTPUT: |
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RETVAL |
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|
