diff options
| -rw-r--r-- | channels/chan_dahdi.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/channels/chan_dahdi.c b/channels/chan_dahdi.c index e1f9e437c..76c701a91 100644 --- a/channels/chan_dahdi.c +++ b/channels/chan_dahdi.c @@ -8819,6 +8819,13 @@ static char * redirectingreason2str(int redirectingreason) static void apply_plan_to_number(char *buf, size_t size, const struct dahdi_pri *pri, const char *number, const int plan) { + if (ast_strlen_zero(number)) { /* make sure a number exists so prefix isn't placed on an empty string */ + if (size) { + *buf = '\0'; + } + return; + } + switch (plan) { case PRI_INTERNATIONAL_ISDN: /* Q.931 dialplan == 0x11 international dialplan => prepend international prefix digits */ snprintf(buf, size, "%s%s", pri->internationalprefix, number); |