diff options
Diffstat (limited to 'openbsc/src/libmgcp/mgcp_network.c')
| -rw-r--r-- | openbsc/src/libmgcp/mgcp_network.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/openbsc/src/libmgcp/mgcp_network.c b/openbsc/src/libmgcp/mgcp_network.c index 233418b87..fe72b7b49 100644 --- a/openbsc/src/libmgcp/mgcp_network.c +++ b/openbsc/src/libmgcp/mgcp_network.c @@ -2,8 +2,8 @@ /* The protocol implementation */ /* - * (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org> - * (C) 2009-2011 by On-Waves + * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org> + * (C) 2009-2012 by On-Waves * All Rights Reserved * * This program is free software; you can redistribute it and/or modify @@ -607,3 +607,31 @@ int mgcp_free_rtp_port(struct mgcp_rtp_end *end) return 0; } + + +void mgcp_state_calc_loss(struct mgcp_rtp_state *state, + struct mgcp_rtp_end *end, uint32_t *expected, + int *loss) +{ + *expected = state->cycles + state->max_seq; + *expected = *expected - state->base_seq + 1; + + if (!state->initialized) { + *expected = 0; + *loss = 0; + return; + } + + /* + * Make sure the sign is correct and use the biggest + * positive/negative number that fits. + */ + *loss = *expected - end->packets; + if (*expected < end->packets) { + if (*loss > 0) + *loss = INT_MIN; + } else { + if (*loss < 0) + *loss = INT_MAX; + } +} |