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define mac_header in utils

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This commit is contained in:
Bastian Bloessl
2013-10-15 19:46:59 +02:00
parent 0bd43f83fe
commit e030e0e069
5 changed files with 38 additions and 76 deletions
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lib/ofdm_mac.cc
+27 -33
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@@ -100,46 +100,39 @@ void app_in (pmt::pmt_t msg) {
void generate_mac_data_frame(const char *msdu, int msdu_size, char **psdu, int *psdu_size) {
//mac frame
MAC_DATAFRAME_HEADER header;
//frame check sequence
unsigned int fcs;
// mac header
mac_header header;
header.frame_control = 0x0008;
header.duration = 0x002e;
// TODO: change this back to 0x08
header.frame_control[0] = 0x08;//0x20; //00000100 00100000 indicate DATA frame (LOL, not), to_ds, from_ds, more frag, retry
header.frame_control[1] = 0x00;//0x40; //all other flags, unutilized //00000010 01000000
header.addr1[0] = 0x30;
header.addr1[1] = 0x14;
header.addr1[2] = 0x4a;
header.addr1[3] = 0xe6;
header.addr1[4] = 0x46;
header.addr1[5] = 0xe4;
header.duration[0] = 0x00; //TODO: set accordingly to payload
header.duration[1] = 0x2e; //0x74; //2e = 00101110 -> 01110100 -> 74
header.addr2[0] = 0x12;
header.addr2[1] = 0x34;
header.addr2[2] = 0x56;
header.addr2[3] = 0x78;
header.addr2[4] = 0x90;
header.addr2[5] = 0xab;
header.address1[0] = 0x30;
header.address1[1] = 0x14;
header.address1[2] = 0x4a;
header.address1[3] = 0xe6;
header.address1[4] = 0x46;
header.address1[5] = 0xe4;
header.addr3[0] = 0x42;
header.addr3[1] = 0x42;
header.addr3[2] = 0x42;
header.addr3[3] = 0x42;
header.addr3[4] = 0x42;
header.addr3[5] = 0x42;
header.address2[0] = 0x12;
header.address2[1] = 0x34;
header.address2[2] = 0x56;
header.address2[3] = 0x78;
header.address2[4] = 0x90;
header.address2[5] = 0xab;
header.address3[0] = 0x42;
header.address3[1] = 0x42;
header.address3[2] = 0x42;
header.address3[3] = 0x42;
header.address3[4] = 0x42;
header.address3[5] = 0x42;
header.sequence = 0;
header.seq_nr = 0;
for (int i = 0; i < 12; i++) {
if(d_seq_nr & (1 << i)) {
header.sequence |= (1 << (i + 4));
header.seq_nr |= (1 << (i + 4));
}
}
header.sequence = htole16(header.sequence);
header.seq_nr = htole16(header.seq_nr);
d_seq_nr++;
//header size is 24, plus 4 for FCS means 28 bytes
@@ -153,7 +146,8 @@ void generate_mac_data_frame(const char *msdu, int msdu_size, char **psdu, int *
//compute and store fcs
boost::crc_32_type result;
result.process_bytes(*psdu, msdu_size + 24);
fcs = result.checksum();
unsigned int fcs = result.checksum();
memcpy(*psdu + msdu_size + 24, &fcs, sizeof(unsigned int));
}