/*------------------------------------------------------------------------
* snb2a - convert the list of bindings from internal form into ASN.1
*------------------------------------------------------------------------
*/
int
snb2a(struct req_desc *rqdp)
{
register u_char *bp;
int len;
struct snbentry *bl;
u_char *ap;
for (bl = rqdp->bindlf; bl; bl = bl->sb_next) {
bp = snmpbuff; /* used for temporary working space */
*bp++ = ASN1_OBJID;
bp += a1writeoid(bp, &bl->sb_oid);
bp += a1writeval(bl, bp);
/*
* We need to allocate bytes in sb_a1str but can't do it
* until we know how many bytes it takes to write the
* length of the binding, so we write that length into
* snmpbuff at the end of the binding. Then we can alloc
* space, and transfer the data.
*/
len = a1writelen(bp, bp - snmpbuff);
bl->sb_a1slen = bp - snmpbuff + len + 1;
ap = bl->sb_a1str = (u_char *) getmem(bl->sb_a1slen);
bl->sb_a1dynstr = TRUE; /* dynamically allocated */
*ap++ = ASN1_SEQ;
memcpy(ap, bp, len); /* write in the length spec. */
ap += len;
memcpy(ap, snmpbuff, bp - snmpbuff);
}
return OK;
}
/*------------------------------------------------------------------------
* a1writeval - convert the value of a variable into ASN.1 equivalent.
*------------------------------------------------------------------------
*/
int
a1writeval(struct snbentry *bl, u_char *bp)
{
u_char *origbp;
origbp = bp;
*bp++ = SVTYPE(bl);
switch(SVTYPE(bl)) {
case ASN1_INT:
case ASN1_COUNTER:
case ASN1_GAUGE:
case ASN1_TIMETICKS:
bp += a1writeint(SVINT(bl), bp, SVTYPE(bl));
break;
case ASN1_NULL:
*bp++ = (u_char) 0;
break;
case ASN1_OCTSTR:
bp += a1writelen(bp, SVSTRLEN(bl));
memcpy(bp, SVSTR(bl), SVSTRLEN(bl));
bp += SVSTRLEN(bl);
freemem(SVSTR(bl), SVSTRLEN(bl));
break;
case ASN1_IPADDR:
*bp++ = IP_ALEN;
memcpy(bp, &SVIPADDR(bl), IP_ALEN);
bp += IP_ALEN;
break;
case ASN1_OBJID:
bp += a1writeoid(bp, &bl->sb_val.sv_val.sv_oid);
break;
default:
break;
}
return bp - origbp;
}
