diff options
| -rw-r--r-- | dhcpd.conf | 6 | ||||
| -rw-r--r-- | dyndhcpd.c | 12 |
2 files changed, 12 insertions, 6 deletions
@@ -18,6 +18,12 @@ subnet __NETADDRESS__ netmask __NETMASK__ { option time-servers __ADDRESS__; range dynamic-bootp __MINHOST__ __MAXHOST__; + + # make sure we do not serve our own address + host localhost { + hardware ethernet de:ad:00:be:ef:00; + fixed-address __ADDRESS__; + } } class "PXEClient" { @@ -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 && |