diff options
Diffstat (limited to 'dyndhcpd.c')
| -rw-r--r-- | dyndhcpd.c | 12 |
1 files changed, 6 insertions, 6 deletions
@@ -154,14 +154,14 @@ int main(int argc, char ** argv) { s_broadcast.s_addr = v_host->s_addr |~ v_mask->s_addr; s_netaddress.s_addr = v_host->s_addr & v_mask->s_addr; - if (ntohl(s_broadcast.s_addr) - ntohl(v_host->s_addr) < ntohl(v_host->s_addr) - ntohl(s_netaddress.s_addr)) { - s_minhost.s_addr = htonl(ntohl(s_netaddress.s_addr) + 1); - s_maxhost.s_addr = htonl(ntohl(v_host->s_addr) - 1); - } else { - s_minhost.s_addr = htonl(ntohl(v_host->s_addr) + 1); - s_maxhost.s_addr = htonl(ntohl(s_broadcast.s_addr) - 1); + if (ntohl(s_broadcast.s_addr) - ntohl(s_netaddress.s_addr) < 2) { + fprintf(stderr, "We do not have addresses to serve, need a netmask with 28 bit minimum.\n"); + return EXIT_FAILURE; } + s_minhost.s_addr = htonl(ntohl(s_netaddress.s_addr) + 1); + s_maxhost.s_addr = htonl(ntohl(s_broadcast.s_addr) - 1); + if (inet_ntop(AF_INET, &s_broadcast, c_broadcast, INET_ADDRSTRLEN) != NULL && inet_ntop(AF_INET, &s_netaddress, c_netaddress, INET_ADDRSTRLEN) != NULL && inet_ntop(AF_INET, &s_minhost, c_minhost, INET_ADDRSTRLEN) != NULL && |