diff options
Diffstat (limited to 'epan/dissectors/packet-mms.c')
| -rw-r--r-- | epan/dissectors/packet-mms.c | 45 |
1 files changed, 20 insertions, 25 deletions
diff --git a/epan/dissectors/packet-mms.c b/epan/dissectors/packet-mms.c index cacfdbaf..81e7aaf3 100644 --- a/epan/dissectors/packet-mms.c +++ b/epan/dissectors/packet-mms.c @@ -1039,7 +1039,6 @@ static int dissect_mms_AlternateAccess(bool implicit_tag _U_, tvbuff_t *tvb _U_, static int dissect_mms_Data(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_); -#define MAX_RECURSION_DEPTH 100 // Arbitrarily chosen. static int @@ -1558,16 +1557,15 @@ static const ber_choice_t TypeSpecification_choice[] = { static int dissect_mms_TypeSpecification(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { - const int proto_id = GPOINTER_TO_INT(wmem_list_frame_data(wmem_list_tail(actx->pinfo->layers))); - const unsigned cycle_size = 3; - unsigned recursion_depth = p_get_proto_depth(actx->pinfo, proto_id); - DISSECTOR_ASSERT(recursion_depth <= MAX_RECURSION_DEPTH); - p_set_proto_depth(actx->pinfo, proto_id, recursion_depth + cycle_size); + // TypeSpecification → TypeSpecification/array → TypeSpecification + actx->pinfo->dissection_depth += 2; + increment_dissection_depth(actx->pinfo); offset = dissect_ber_choice(actx, tree, tvb, offset, TypeSpecification_choice, hf_index, ett_mms_TypeSpecification, NULL); - p_set_proto_depth(actx->pinfo, proto_id, recursion_depth - cycle_size); + actx->pinfo->dissection_depth -= 2; + decrement_dissection_depth(actx->pinfo); return offset; } @@ -1749,15 +1747,14 @@ static const ber_sequence_t AlternateAccess_sequence_of[1] = { static int dissect_mms_AlternateAccess(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { - const int proto_id = GPOINTER_TO_INT(wmem_list_frame_data(wmem_list_tail(actx->pinfo->layers))); - const unsigned cycle_size = 5; - unsigned recursion_depth = p_get_proto_depth(actx->pinfo, proto_id); - DISSECTOR_ASSERT(recursion_depth <= MAX_RECURSION_DEPTH); - p_set_proto_depth(actx->pinfo, proto_id, recursion_depth + cycle_size); + // AlternateAccess → AlternateAccess/_item → AlternateAccessSelection → AlternateAccessSelection/selectAlternateAccess → AlternateAccess + actx->pinfo->dissection_depth += 4; + increment_dissection_depth(actx->pinfo); offset = dissect_ber_sequence_of(implicit_tag, actx, tree, tvb, offset, AlternateAccess_sequence_of, hf_index, ett_mms_AlternateAccess); - p_set_proto_depth(actx->pinfo, proto_id, recursion_depth - cycle_size); + actx->pinfo->dissection_depth -= 4; + decrement_dissection_depth(actx->pinfo); return offset; } @@ -1811,16 +1808,15 @@ static const ber_choice_t VariableSpecification_choice[] = { static int dissect_mms_VariableSpecification(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { - const int proto_id = GPOINTER_TO_INT(wmem_list_frame_data(wmem_list_tail(actx->pinfo->layers))); - const unsigned cycle_size = 4; - unsigned recursion_depth = p_get_proto_depth(actx->pinfo, proto_id); - DISSECTOR_ASSERT(recursion_depth <= MAX_RECURSION_DEPTH); - p_set_proto_depth(actx->pinfo, proto_id, recursion_depth + cycle_size); + // VariableSpecification → ScatteredAccessDescription → ScatteredAccessDescription/_item → VariableSpecification + actx->pinfo->dissection_depth += 3; + increment_dissection_depth(actx->pinfo); offset = dissect_ber_choice(actx, tree, tvb, offset, VariableSpecification_choice, hf_index, ett_mms_VariableSpecification, NULL); - p_set_proto_depth(actx->pinfo, proto_id, recursion_depth - cycle_size); + actx->pinfo->dissection_depth -= 3; + decrement_dissection_depth(actx->pinfo); return offset; } @@ -2097,16 +2093,15 @@ static const ber_choice_t Data_choice[] = { static int dissect_mms_Data(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { - const int proto_id = GPOINTER_TO_INT(wmem_list_frame_data(wmem_list_tail(actx->pinfo->layers))); - const unsigned cycle_size = 3; - unsigned recursion_depth = p_get_proto_depth(actx->pinfo, proto_id); - DISSECTOR_ASSERT(recursion_depth <= MAX_RECURSION_DEPTH); - p_set_proto_depth(actx->pinfo, proto_id, recursion_depth + cycle_size); + // Data → Data/array → Data + actx->pinfo->dissection_depth += 2; + increment_dissection_depth(actx->pinfo); offset = dissect_ber_choice(actx, tree, tvb, offset, Data_choice, hf_index, ett_mms_Data, NULL); - p_set_proto_depth(actx->pinfo, proto_id, recursion_depth - cycle_size); + actx->pinfo->dissection_depth -= 2; + decrement_dissection_depth(actx->pinfo); return offset; } |