mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2024-10-30 06:36:21 +00:00
Code Issues Releases Wiki Activity

[TAS-198] tag verification: debug MACSEQ (flex)

Browse Source 
- reset the d_GST_Sf computation being d_GST_SIS - 30 seconds. All FLX tags successfuly verified.
This commit is contained in:
cesaaargm 2024-06-10 19:47:41 +02:00
parent 4f7a22f35c
commit 8de00f92bf
1 changed files with 2 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/core/libs/osnma_msg_receiver.cc
View File

@ -1255,7 +1255,7 @@ void osnma_msg_receiver::control_tags_awaiting_verify_size()
bool osnma_msg_receiver::verify_macseq(const MACK_message& mack)
{
// MACSEQ verification
//d_GST_Sf = d_GST_SIS - 30; // time of the start of SF containing MACSEQ // TODO buffer with times? since out of debug not every 30 s a Sf is necessarily received..
d_GST_Sf = d_GST_SIS - 30; // time of the start of SF containing MACSEQ // TODO buffer with times? since out of debug not every 30 s a Sf is necessarily received..
std::vector<uint8_t> applicable_key = d_tesla_keys[mack.TOW + 30]; // current tesla key ie transmitted in the next subframe
std::vector<std::string> sq1{};
std::vector<std::string> sq2{};
@ -1310,7 +1310,7 @@ bool osnma_msg_receiver::verify_macseq(const MACK_message& mack)
// Fixed as well as FLX Tags share first part - Eq. 22 ICD
std::vector<uint8_t> m(5 + 2 * flxTags.size()); // each flx tag brings two bytes
m[0] = static_cast<uint8_t>(mack.PRNa); // PRN_A - SVID of the satellite transmiting the tag
m[1] = static_cast<uint8_t>((d_GST_Sf & 0xFF000000) >> 24);
m[1] = static_cast<uint8_t>((d_GST_Sf & 0xFF000000) >> 24); // TODO d_GST_Sf left useless
m[2] = static_cast<uint8_t>((d_GST_Sf & 0x00FF0000) >> 16);
m[3] = static_cast<uint8_t>((d_GST_Sf & 0x0000FF00) >> 8);
m[4] = static_cast<uint8_t>(d_GST_Sf & 0x000000FF);
@ -1321,10 +1321,6 @@ bool osnma_msg_receiver::verify_macseq(const MACK_message& mack)
m[2*i + 6] = mack.tag_and_info[flxTags[i]].tag_info.ADKD << 4 |
mack.tag_and_info[flxTags[i]].tag_info.cop;
}
// m = {0x18, 0x4f, 0x93, 0x53, 0x04, 0x05, 0x0f, 0x1f, 0x0f};
// applicable_key = {0x11, 0x26, 0x47, 0x3b, 0x0e, 0x05, 0x05, 0x35,
// 0xb0, 0xf2, 0xa7, 0x24, 0x00, 0x22, 0xba, 0x8f};
// applicable_OSNMA.d_mack_message.header.macseq = 0xbb8;
// compute mac
std::vector<uint8_t> mac;
if (d_osnma_data.d_dsm_kroot_message.mf == 0) // C: HMAC-SHA-256