static int
dissect_object_id(tvbuff_t *tvb, proto_tree *tree, int offset, guint8 flags, enum OID_USAGE oid_usage)
{
guint8 n_subid;
guint8 prefix;
guint8 include;
proto_item* item;
proto_tree* subtree;
guint32 oid[2048];
char str_oid[2048];
int i;
memset(oid, '\0', sizeof(oid));
memset(str_oid, '\0', sizeof(str_oid));
n_subid = tvb_get_guint8(tvb, offset);
prefix = tvb_get_guint8(tvb, offset + 1);
include = tvb_get_guint8(tvb, offset + 2);
tvb_get_guint8(tvb, offset + 3);
for(i=0; i<n_subid; i++) {
NORLEL(flags, oid[i], tvb, (offset+4) + (i*4));
}
if(!convert_oid_to_str(&oid[0], n_subid, &str_oid[0], 2048, prefix))
g_snprintf(&str_oid[0], 2048, "(null)");
if(tree) {
const char *range = "";
const char *inclusion = (include) ? " (Inclusive)" : " (Exclusive)";
switch (oid_usage) {
case OID_START_RANGE: range = "(Range Start) "; break;
case OID_END_RANGE: range = " (Range End) "; break;
default: inclusion = ""; break;
}
item = proto_tree_add_text(tree, tvb, offset, 4 + (n_subid * 4) ,
"Object Identifier: %s%s%s", range, str_oid, inclusion);
subtree = proto_item_add_subtree(item, ett_obj_ident);
} else
return offset;
proto_tree_add_uint(subtree, hf_oid_sub, tvb, offset, 1, n_subid);
proto_tree_add_uint(subtree, hf_oid_prefix, tvb, offset + 1, 1, prefix);
proto_tree_add_boolean(subtree, hf_oid_include, tvb, offset + 2, 1, include);
proto_tree_add_string(subtree, hf_oid_str, tvb, offset + 4, (n_subid * 4), str_oid);
return 4 + (n_subid * 4);
}
static int dissect_octet_string(tvbuff_t *tvb, proto_tree *tree, int offset, char flags)
{
guint32 n_oct, p_noct;
char context[1024];
NORLEL(flags, n_oct, tvb, offset);
p_noct = PADDING(n_oct);
if (n_oct >= 1024)
THROW(ReportedBoundsError);
tvb_get_nstringz(tvb, offset + 4, n_oct, context);
context[n_oct]='\0';
proto_tree_add_uint(tree,hf_ostring_len,tvb,offset,4,n_oct);
proto_tree_add_string(tree, hf_ostring, tvb, offset + 4, n_oct, context);
return p_noct + 4;
}
static int
dissect_octet_string(tvbuff_t *tvb, proto_tree *tree, int offset, guint8 flags)
{
guint32 n_oct, p_noct;
NORLEL(flags, n_oct, tvb, offset);
p_noct = PADDING(n_oct);
proto_tree_add_uint(tree, hf_ostring_len, tvb, offset, 4, n_oct);
/*
* XXX - an "octet string" is not necessarily a text string, so
* having hf_ostring be FT_STRING is not necessarily appropriate.
*/
proto_tree_add_item(tree, hf_ostring, tvb, offset + 4, n_oct, ENC_ASCII|ENC_NA);
return p_noct + 4;
}
static void
dissect_response_pdu(tvbuff_t *tvb, proto_tree *tree, int offset, int len, guint8 flags)
{
proto_tree* subtree;
guint encoding = (flags & NETWORK_BYTE_ORDER) ? ENC_BIG_ENDIAN : ENC_LITTLE_ENDIAN;
guint32 r_uptime;
subtree = proto_tree_add_subtree(tree, tvb, offset, len, ett_response, NULL, "Response-PDU");
NORLEL(flags, r_uptime, tvb, offset);
proto_tree_add_uint_format(subtree, hf_resp_uptime, tvb, offset, 4, r_uptime,
"sysUptime: %s", time_msecs_to_str(wmem_packet_scope(), r_uptime));
proto_tree_add_item(subtree, hf_resp_error, tvb, offset + 4, 2, encoding);
proto_tree_add_item(subtree, hf_resp_index, tvb, offset + 6, 2, encoding);
offset += 8;
len += PDU_HDR_LEN;
while(len > offset) {
offset += dissect_varbind(tvb, subtree, offset, len, flags);
}
}
static int dissect_object_id(tvbuff_t *tvb, proto_tree *tree, int offset, char flags)
{
guint8 n_subid;
guint8 prefix;
guint8 include;
proto_item* item;
proto_tree* subtree;
guint32 oid[2048];
char str_oid[2048];
int i, slen;
memset(oid, '\0', sizeof(oid));
memset(str_oid, '\0', sizeof(str_oid));
n_subid = tvb_get_guint8(tvb, offset);
prefix = tvb_get_guint8(tvb, offset + 1);
include = tvb_get_guint8(tvb,offset + 2);
tvb_get_guint8(tvb, offset + 3);
for(i=0; i<n_subid; i++) {
NORLEL(flags, oid[i], tvb, (offset+4) + (i*4));
}
if(!(slen = convert_oid_to_str(&oid[0], n_subid, &str_oid[0], 2048, prefix)))
return offset;
if(tree) {
item = proto_tree_add_text(tree,tvb,offset,n_subid + 4 ,
"Object Identifier: (%s) %s",(include) ? "Start" : "End" , str_oid);
subtree = proto_item_add_subtree(item, ett_obj_ident);
} else return offset;
proto_tree_add_uint(subtree, hf_oid_sub, tvb, offset, 1, n_subid);
proto_tree_add_uint(subtree, hf_oid_prefix, tvb, offset + 1, 1, prefix);
proto_tree_add_uint(subtree, hf_oid_include, tvb, offset + 2, 1, include);
proto_tree_add_string(subtree,hf_oid_str, tvb, offset + 4, slen, str_oid);
return 4 + (n_subid * 4);
}