diff options
Diffstat (limited to 'src/query.c')
| -rw-r--r-- | src/query.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/query.c b/src/query.c index 7a3e0bd..fe5d541 100644 --- a/src/query.c +++ b/src/query.c @@ -120,6 +120,7 @@ static int send_dns_packet(int fd, struct dns_packet *p) { struct ifreq ifreq[32]; struct ifconf ifconf; int n_sent = 0; + int last_index = -1; assert(fd >= 0 && p); assert(dns_packet_check_valid(p) >= 0); @@ -181,8 +182,14 @@ static int send_dns_packet(int fd, struct dns_packet *p) { if (ioctl(fd, SIOCGIFINDEX, &ifreq[i]) < 0) continue; /* See above why we ignore this error */ - - pkti->ipi_ifindex = ifreq[i].ifr_ifindex; + + /* Only send the the packet once per interface. We assume that + * multiple addresses assigned to the same interface follow + * immediately one after the other.*/ + if (last_index == ifreq[i].ifr_ifindex) + continue; + + last_index = pkti->ipi_ifindex = ifreq[i].ifr_ifindex; for (;;) { |