diff options
| -rw-r--r-- | main/callerid.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/main/callerid.c b/main/callerid.c index aa53eb83e..ee169c389 100644 --- a/main/callerid.c +++ b/main/callerid.c @@ -568,9 +568,22 @@ int callerid_feed(struct callerid_state *cid, unsigned char *ubuf, int len, stru return -1; } if (res == 1) { - /* Ignore invalid bytes */ - if (b > 0xff) - continue; + if (b > 0xff) { + if (cid->sawflag != 5) { + /* Ignore invalid bytes */ + continue; + } + /* + * We can tollerate an error on the checksum character since the + * checksum character is the last character in the message and + * it validates the message. + * + * Remove character error flags. + * Bit 8 : Parity error + * Bit 9 : Framing error + */ + b &= 0xff; + } switch (cid->sawflag) { case 0: /* Look for flag */ if (b == 'U') |