diff options
Diffstat (limited to 'networking/udhcp/dhcpd.c')
| -rw-r--r-- | networking/udhcp/dhcpd.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/networking/udhcp/dhcpd.c b/networking/udhcp/dhcpd.c index 6c16dfe..56ddaa9 100644 --- a/networking/udhcp/dhcpd.c +++ b/networking/udhcp/dhcpd.c @@ -95,6 +95,7 @@ int main(int argc, char *argv[]) int pid_fd; int max_sock; int sig; + unsigned long num_ips; OPEN_LOG("udhcpd"); LOG(LOG_INFO, "udhcp server (v%s) started", VERSION); @@ -114,7 +115,15 @@ int main(int argc, char *argv[]) } else server_config.lease = LEASE_TIME; - leases = malloc(sizeof(struct dhcpOfferedAddr) * server_config.max_leases); + /* Sanity check */ + num_ips = ntohl(server_config.end) - ntohl(server_config.start); + if (server_config.max_leases > num_ips) { + LOG(LOG_ERR, "max_leases value (%lu) not sane, setting to %lu instead", + server_config.max_leases, num_ips); + server_config.max_leases = num_ips; + } + + leases = xmalloc(sizeof(struct dhcpOfferedAddr) * server_config.max_leases); memset(leases, 0, sizeof(struct dhcpOfferedAddr) * server_config.max_leases); read_leases(server_config.lease_file); |