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cansequence: add internal 32 bit sequence counter

pull/254/head^2
Marc Kleine-Budde 2015-09-18 14:04:47 +02:00
parent 36fc75bdb7
commit de5b9607dc
1 changed files with 16 additions and 11 deletions
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27
cansequence.c
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@ -89,8 +89,11 @@ static void do_receive()
};
const int dropmonitor_on = 1;
bool sequence_init = true;
unsigned int seq_wrap = 0;
uint8_t sequence = 0;
unsigned int sequence_wrap = 0;
uint32_t sequence_mask = 0xff;
uint32_t sequence_rx = 0;
uint32_t sequence_delta = 0;
uint32_t sequence = 0;
if (setsockopt(s, SOL_SOCKET, SO_RXQ_OVFL,
&dropmonitor_on, sizeof(dropmonitor_on)) < 0) {
@ -116,15 +119,15 @@ static void do_receive()
exit(EXIT_FAILURE);
}
sequence_rx = frame.data[0];
if (sequence_init) {
sequence_init = false;
sequence = frame.data[0];
sequence = sequence_rx;
}
if (verbose > 1)
printf("received frame. sequence number: %d\n", frame.data[0]);
if (frame.data[0] != sequence) {
sequence_delta = (sequence_rx - sequence) & sequence_mask;
if (sequence_delta) {
struct cmsghdr *cmsg;
uint32_t overflows = 0;
@ -140,17 +143,19 @@ static void do_receive()
}
fprintf(stderr, "[%d] received wrong sequence count. expected: %d, got: %d, socket overflows: %u\n",
drop_count, sequence, frame.data[0], overflows);
drop_count, sequence & sequence_mask, sequence_rx, overflows);
if (drop_count == drop_until_quit)
exit(EXIT_FAILURE);
sequence = frame.data[0];
sequence = sequence_rx;
} else if (verbose > 1) {
printf("sequence CNT: %6u, RX: %6u\n", sequence, sequence_rx);
}
sequence++;
if (verbose && !sequence)
printf("sequence wrap around (%d)\n", seq_wrap++);
if (verbose && !(sequence & sequence_mask))
printf("sequence wrap around (%d)\n", sequence_wrap++);
}
}