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Added malformed_packet exception. Every class except Dot11* use it.

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This commit is contained in:
Matias Fontanini
2013-04-18 00:12:20 -03:00
parent 923f51ae15
commit 3fd1b3d37d
53 changed files with 267 additions and 159 deletions
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19
src/icmpv6.cpp
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@@ -34,6 +34,7 @@
#include "rawpdu.h"
#include "utils.h"
#include "constants.h"
#include "exceptions.h"
namespace Tins {
@@ -48,27 +49,27 @@ ICMPv6::ICMPv6(const uint8_t *buffer, uint32_t total_sz)
: _options_size(), reach_time(0), retrans_timer(0)
{
if(total_sz < sizeof(_header))
throw std::runtime_error("Not enough size for an ICMPv6 header");
throw malformed_packet();
std::memcpy(&_header, buffer, sizeof(_header));
buffer += sizeof(_header);
total_sz -= sizeof(_header);
if(has_target_addr()) {
if(total_sz < ipaddress_type::address_size)
throw std::runtime_error("Not enough size for the target address");
throw malformed_packet();
target_addr(buffer);
buffer += ipaddress_type::address_size;
total_sz -= ipaddress_type::address_size;
}
if(has_dest_addr()) {
if(total_sz < ipaddress_type::address_size)
throw std::runtime_error("Not enough size for the destination address");
throw malformed_packet();
dest_addr(buffer);
buffer += ipaddress_type::address_size;
total_sz -= ipaddress_type::address_size;
}
if(type() == ROUTER_ADVERT) {
if(total_sz < sizeof(uint32_t) * 2)
throw std::runtime_error("Not enough size for router advert fields");
throw malformed_packet();
const uint32_t *ptr_32 = (const uint32_t*)buffer;
reach_time = *ptr_32++;
retrans_timer = *ptr_32++;
@@ -85,9 +86,15 @@ ICMPv6::ICMPv6(const uint8_t *buffer, uint32_t total_sz)
void ICMPv6::parse_options(const uint8_t *&buffer, uint32_t &total_sz) {
while(total_sz > 0) {
if(total_sz < 8 || (static_cast<uint32_t>(buffer[1]) * 8) > total_sz || buffer[1] < 1)
throw std::runtime_error("Not enough size for options");
throw malformed_packet();
// size(option) = option_size - identifier_size - length_identifier_size
add_option(option(buffer[0], static_cast<uint32_t>(buffer[1]) * 8 - sizeof(uint8_t) * 2, buffer + 2));
add_option(
option(
buffer[0],
static_cast<uint32_t>(buffer[1]) * 8 - sizeof(uint8_t) * 2,
buffer + 2
)
);
total_sz -= buffer[1] * 8;
buffer += buffer[1] * 8;
}