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Code Issues Releases Wiki Activity

LLC almost works

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This commit is contained in:
Santiago Alessandri
2012-03-19 12:04:55 -03:00
parent 937a4d66cc
commit 01a7b812df
6 changed files with 710 additions and 60 deletions
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85
src/llc.cpp
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@@ -38,10 +38,18 @@ using Tins::LLC;
const uint8_t LLC::GLOBAL_DSAP_ADDR = 0xFF;
const uint8_t LLC::NULL_ADDR = 0x00;
LLC::LLC(PDU *child) : PDU(0xff, child) {
LLC::LLC(PDU *child) : PDU(0xff, child), _type(LLC::INFORMATION) {
memset(&_header, 0, sizeof(llchdr));
control_field_length = 2;
control_field = 0;
memset(&control_field, 0, sizeof(control_field));
information_field_length = 0;
}
LLC::LLC(uint8_t dsap, uint8_t ssap, PDU *child) : PDU(0xff, child), _type(LLC::INFORMATION) {
_header.dsap = dsap;
_header.ssap = ssap;
control_field_length = 2;
memset(&control_field, 0, sizeof(control_field));
information_field_length = 0;
}
@@ -52,15 +60,16 @@ LLC::LLC(const uint8_t *buffer, uint32_t total_sz) : PDU(0xff) {
buffer += sizeof(_header);
total_sz -= sizeof(_header);
if ((buffer[0] & 0x03) == LLC::UNNUMBERED) {
control_field_length = 1;
control_field = buffer[0];
type(LLC::UNNUMBERED);
std::memcpy(&control_field.unnumbered, buffer, sizeof(un_control_field));
buffer++;
total_sz -= 1;
//TODO: Create information fields if corresponding.
}
else {
type((Format)(buffer[0] & 0x03));
control_field_length = 2;
control_field = Utils::net_to_host_s(((uint16_t*)buffer)[0]);
std::memcpy(&control_field.info, buffer, sizeof(un_control_field));
buffer += 2;
total_sz -= 2;
}
@@ -104,20 +113,19 @@ void LLC::ssap(uint8_t new_ssap) {
}
void LLC::type(LLC::Format type) {
_type = type;
switch (type) {
case LLC::INFORMATION:
control_field_length = 2;
control_field &= 0xFFFE;
control_field.info.type_bit = 0;
break;
case LLC::SUPERVISORY:
control_field_length = 2;
control_field &= 0xFFFD;
control_field |= type;
control_field.super.type_bit = 1;
break;
case LLC::UNNUMBERED:
control_field_length = 1;
control_field &= 0xFD;
control_field |= type;
control_field.unnumbered.type_bits = 3;
break;
}
}
@@ -125,48 +133,48 @@ void LLC::type(LLC::Format type) {
void LLC::send_seq_number(uint8_t seq_number) {
if (type() != LLC::INFORMATION)
return;
control_field &= 0xFF01;
control_field |= seq_number;
control_field.info.send_seq_num = seq_number;
}
void LLC::receive_seq_number(uint8_t seq_number) {
if (type() == LLC::UNNUMBERED)
return;
uint16_t to_mask = seq_number <<= 9;
control_field &= 0x01FF;
control_field |= to_mask;
switch (type()) {
case LLC::UNNUMBERED:
return;
case LLC::INFORMATION:
control_field.info.recv_seq_num = seq_number;
break;
case LLC::SUPERVISORY:
control_field.super.recv_seq_num = seq_number;
break;
}
}
void LLC::poll_final(bool value) {
uint16_t mask = 0;
switch (type()) {
case LLC::UNNUMBERED:
mask = 0xFFEF;
control_field.unnumbered.poll_final_bit = value;
break;
case LLC::INFORMATION:
control_field.info.poll_final_bit = value;
return;
case LLC::SUPERVISORY:
mask = 0xFEFF;
control_field.super.poll_final_bit = value;
break;
}
if (value)
control_field |= ~mask;
else
control_field &= mask;
}
void LLC::supervisory_function(LLC::SupervisoryFunctions new_func) {
if (type() != LLC::SUPERVISORY)
return;
control_field &= 0xFFF3;
control_field |= new_func;
control_field.super.supervisory_func = new_func;
}
void LLC::modifier_function(LLC::ModifierFunctions mod_func) {
if (type() != LLC::UNNUMBERED)
return;
control_field &= 0xEC;
control_field |= mod_func;
control_field.unnumbered.mod_func1 = mod_func >> 3;
control_field.unnumbered.mod_func2 = mod_func & 0x07;
}
void LLC::add_xid_information(uint8_t xid_id, uint8_t llc_type_class, uint8_t receive_window) {
@@ -214,14 +222,21 @@ void LLC::write_serialization(uint8_t *buffer, uint32_t total_sz, const Tins::PD
assert(total_sz >= header_size());
std::memcpy(buffer, &_header, sizeof(_header));
buffer += sizeof(_header);
if (control_field_length == 1) {
*buffer = (uint8_t)control_field;
buffer++;
}
else {
*((uint16_t*)buffer) = Utils::net_to_host_s(control_field);
buffer += 2;
switch (type()) {
case LLC::UNNUMBERED:
std::memcpy(buffer, &(control_field.unnumbered), sizeof(un_control_field));
buffer += sizeof(un_control_field);
break;
case LLC::INFORMATION:
std::memcpy(buffer, &(control_field.info), sizeof(info_control_field));
buffer += sizeof(info_control_field);
break;
case LLC::SUPERVISORY:
std::memcpy(buffer, &(control_field.super), sizeof(super_control_field));
buffer += sizeof(super_control_field);
break;
}
for (list<pair<uint8_t, uint8_t*> >::iterator it = information_fields.begin(); it != information_fields.end(); it++) {
std::memcpy(buffer, it->second, it->first);
buffer += it->first;