diff --git a/src/ip.cpp b/src/ip.cpp index 6928356..eb646f7 100644 --- a/src/ip.cpp +++ b/src/ip.cpp @@ -110,8 +110,10 @@ IP::IP(const uint8_t *buffer, uint32_t total_sz) } uint8_t padding = _options_size % 4; _padded_options_size = padding ? (_options_size - padding + 4) : _options_size; - // check this line PLX - total_sz = std::min(total_sz, (uint32_t)tot_len()); + // Don't avoid consuming more than we should if tot_len is 0, + // since this is the case when using TCP segmentation offload + if (tot_len() != 0) + total_sz = std::min(total_sz, (uint32_t)tot_len()); if (total_sz < head_len() * sizeof(uint32_t)) throw malformed_packet(); total_sz -= head_len() * sizeof(uint32_t); diff --git a/tests/src/ip.cpp b/tests/src/ip.cpp index b15e85c..c3f6f00 100644 --- a/tests/src/ip.cpp +++ b/tests/src/ip.cpp @@ -6,6 +6,7 @@ #include "tcp.h" #include "udp.h" #include "icmp.h" +#include "rawpdu.h" #include "ip_address.h" #include "utils.h" #include "ethernetII.h" @@ -15,7 +16,8 @@ using namespace Tins; class IPTest : public testing::Test { public: - static const uint8_t expected_packet[], fragmented_packet[], fragmented_ether_ip_packet[]; + static const uint8_t expected_packet[], fragmented_packet[], + fragmented_ether_ip_packet[], tot_len_zero_packet[]; void test_equals(const IP &ip1, const IP &ip2); }; @@ -38,6 +40,409 @@ const uint8_t IPTest::fragmented_ether_ip_packet[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; +const uint8_t IPTest::tot_len_zero_packet[] = { + 60, 151, 14, 219, 60, 164, 60, 151, 14, 218, 161, 43, 8, 0, 69, 0 + , 0, 0, 29, 214, 64, 0, 128, 6, 0, 0, 192, 168, 1, 20, 192, 168, + 1, 21, 192, 190, 23, 172, 226, 151, 206, 49, 83, 30, 140, 232, 80 + , 24, 1, 0, 131, 128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 165, 111, 64, 0, 1, 0, 0, 0, 2, 66, 65, 0, 2 + , 66, 65, 0, 0, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, + 0, 32, 0, 32, 0, 40, 0, 40, 0, 40, 0, 40, 0, 40, 0, 32, 0, 32, 0, + 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, + 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 72, 0, 16, 0, 16 + , 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, + 0, 16, 0, 16, 0, 16, 0, 16, 0, 132, 0, 132, 0, 132, 0, 132, 0, + 132, 0, 132, 0, 132, 0, 132, 0, 132, 0, 132, 0, 16, 0, 16, 0, 16, + 0, 16, 0, 16, 0, 16, 0, 16, 0, 129, 0, 129, 0, 129, 0, 129, 0, + 129, 0, 129, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 + , 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, + 1, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 130, 0, 130, 0, + 130, 0, 130, 0, 130, 0, 130, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, + 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, + 0, 2, 0, 2, 0, 2, 0, 16, 0, 16, 0, 16, 0, 16, 0, 32, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 46 + , 0, 0, 0, 1, 0, 0, 0, 120, 16, 65, 0, 104, 16, 65, 0, 255, 255, + 255, 255, 0, 10, 0, 0, 16, 0, 0, 0, 248, 3, 0, 0, 32, 5, 147, 25, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 192, 11, 0, 0, 0, 0 + , 0, 0, 0, 29, 0, 0, 192, 4, 0, 0, 0, 0, 0, 0, 0, 150, 0, 0, 192, + 4, 0, 0, 0, 0, 0, 0, 0, 141, 0, 0, 192, 8, 0, 0, 0, 0, 0, 0, 0, + 142, 0, 0, 192, 8, 0, 0, 0, 0, 0, 0, 0, 143, 0, 0, 192, 8, 0, 0, + 0, 0, 0, 0, 0, 144, 0, 0, 192, 8, 0, 0, 0, 0, 0, 0, 0, 145, 0, 0, + 192, 8, 0, 0, 0, 0, 0, 0, 0, 146, 0, 0, 192, 8, 0, 0, 0, 0, 0, 0 + , 0, 147, 0, 0, 192, 8, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 7, 0, 0, + 0, 10, 0, 0, 0, 140, 0, 0, 0, 2, 0, 0, 0, 240, 18, 65, 0, 8, 0, + 0, 0, 196, 18, 65, 0, 9, 0, 0, 0, 152, 18, 65, 0, 10, 0, 0, 0, + 116, 18, 65, 0, 16, 0, 0, 0, 72, 18, 65, 0, 17, 0, 0, 0, 24, 18, + 65, 0, 18, 0, 0, 0, 244, 17, 65, 0, 19, 0, 0, 0, 200, 17, 65, 0, + 24, 0, 0, 0, 144, 17, 65, 0, 25, 0, 0, 0, 104, 17, 65, 0, 26, 0, + 0, 0, 48, 17, 65, 0, 27, 0, 0, 0, 248, 16, 65, 0, 28, 0, 0, 0, + 208, 16, 65, 0, 120, 0, 0, 0, 192, 16, 65, 0, 121, 0, 0, 0, 176, + 16, 65, 0, 122, 0, 0, 0, 160, 16, 65, 0, 252, 0, 0, 0, 156, 16, + 65, 0, 255, 0, 0, 0, 140, 16, 65, 0, 15, 197, 64, 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0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + , 0, 0, 0, 0, 0 +}; + TEST_F(IPTest, DefaultConstructor) { IP ip; @@ -95,6 +500,13 @@ TEST_F(IPTest, SerializeFragmentedPacket) { ); } +TEST_F(IPTest, TotalLengthZeroPacket) { + EthernetII pkt(tot_len_zero_packet, sizeof(tot_len_zero_packet)); + ASSERT_TRUE(pkt.find_pdu()); + ASSERT_TRUE(pkt.find_pdu()); + EXPECT_EQ(8192, pkt.rfind_pdu().payload_size()); +} + TEST_F(IPTest, TOS) { IP ip; ip.tos(0x7a);