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cansequence: add internal 32 bit sequence counter

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This commit is contained in:
Marc Kleine-Budde
2020-10-14 18:02:32 +02:00
parent 36fc75bdb7
commit de5b9607dc
1 changed files with 16 additions and 11 deletions
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cansequence.c
+16 -11
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@@ -89,8 +89,11 @@ static void do_receive()
}; };
const int dropmonitor_on = 1; const int dropmonitor_on = 1;
bool sequence_init = true; bool sequence_init = true;
unsigned int seq_wrap = 0; unsigned int sequence_wrap = 0;
uint8_t sequence = 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, if (setsockopt(s, SOL_SOCKET, SO_RXQ_OVFL,
&dropmonitor_on, sizeof(dropmonitor_on)) < 0) { &dropmonitor_on, sizeof(dropmonitor_on)) < 0) {
@@ -116,15 +119,15 @@ static void do_receive()
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
sequence_rx = frame.data[0];
if (sequence_init) { if (sequence_init) {
sequence_init = false; sequence_init = false;
sequence = frame.data[0]; sequence = sequence_rx;
} }
if (verbose > 1) sequence_delta = (sequence_rx - sequence) & sequence_mask;
printf("received frame. sequence number: %d\n", frame.data[0]); if (sequence_delta) {
if (frame.data[0] != sequence) {
struct cmsghdr *cmsg; struct cmsghdr *cmsg;
uint32_t overflows = 0; 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", 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) if (drop_count == drop_until_quit)
exit(EXIT_FAILURE); 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++; sequence++;
if (verbose && !sequence) if (verbose && !(sequence & sequence_mask))
printf("sequence wrap around (%d)\n", seq_wrap++); printf("sequence wrap around (%d)\n", sequence_wrap++);
} }
} }