diff options
Diffstat (limited to 'networking/udhcp/serverpacket.c')
| -rw-r--r-- | networking/udhcp/serverpacket.c | 111 |
1 files changed, 48 insertions, 63 deletions
diff --git a/networking/udhcp/serverpacket.c b/networking/udhcp/serverpacket.c index b5cfcf405..8889fda86 100644 --- a/networking/udhcp/serverpacket.c +++ b/networking/udhcp/serverpacket.c @@ -20,17 +20,10 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <string.h> -#include <time.h> - #include "common.h" -#include "serverpacket.h" #include "dhcpd.h" #include "options.h" -#include "static_leases.h" + /* send a packet to giaddr using the kernel ip stack */ static int send_packet_to_relay(struct dhcpMessage *payload) @@ -122,65 +115,57 @@ int sendOffer(struct dhcpMessage *oldpacket) static_lease_ip = getIpByMac(server_config.static_leases, oldpacket->chaddr); /* ADDME: if static, short circuit */ - if(!static_lease_ip) - { - /* the client is in our lease/offered table */ - if ((lease = find_lease_by_chaddr(oldpacket->chaddr))) { - if (!lease_expired(lease)) - lease_time_align = lease->expires - time(0); - packet.yiaddr = lease->yiaddr; - - /* Or the client has a requested ip */ - } else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) && - - /* Don't look here (ugly hackish thing to do) */ - memcpy(&req_align, req, 4) && - - /* and the ip is in the lease range */ - ntohl(req_align) >= ntohl(server_config.start) && - ntohl(req_align) <= ntohl(server_config.end) && - - !static_lease_ip && /* Check that its not a static lease */ + if (!static_lease_ip) { + /* the client is in our lease/offered table */ + lease = find_lease_by_chaddr(oldpacket->chaddr); + if (lease) { + if (!lease_expired(lease)) + lease_time_align = lease->expires - time(0); + packet.yiaddr = lease->yiaddr; + + /* Or the client has a requested ip */ + } else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) + /* Don't look here (ugly hackish thing to do) */ + && memcpy(&req_align, req, 4) + /* and the ip is in the lease range */ + && ntohl(req_align) >= ntohl(server_config.start) + && ntohl(req_align) <= ntohl(server_config.end) + && !static_lease_ip /* Check that its not a static lease */ /* and is not already taken/offered */ - ((!(lease = find_lease_by_yiaddr(req_align)) || - - /* or its taken, but expired */ /* ADDME: or maybe in here */ - lease_expired(lease)))) { - packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */ - + && (!(lease = find_lease_by_yiaddr(req_align)) + /* or its taken, but expired */ /* ADDME: or maybe in here */ + || lease_expired(lease)) + ) { + packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */ /* otherwise, find a free IP */ - } else { + } else { /* Is it a static lease? (No, because find_address skips static lease) */ - packet.yiaddr = find_address(0); - - /* try for an expired lease */ - if (!packet.yiaddr) packet.yiaddr = find_address(1); - } - - if(!packet.yiaddr) { - bb_error_msg("no IP addresses to give - OFFER abandoned"); - return -1; - } - - if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) { - bb_error_msg("lease pool is full - OFFER abandoned"); - return -1; - } - - if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) { - memcpy(&lease_time_align, lease_time, 4); - lease_time_align = ntohl(lease_time_align); - if (lease_time_align > server_config.lease) + packet.yiaddr = find_address(0); + /* try for an expired lease */ + if (!packet.yiaddr) packet.yiaddr = find_address(1); + } + + if (!packet.yiaddr) { + bb_error_msg("no IP addresses to give - OFFER abandoned"); + return -1; + } + if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) { + bb_error_msg("lease pool is full - OFFER abandoned"); + return -1; + } + lease_time = get_option(oldpacket, DHCP_LEASE_TIME); + if (lease_time) { + memcpy(&lease_time_align, lease_time, 4); + lease_time_align = ntohl(lease_time_align); + if (lease_time_align > server_config.lease) + lease_time_align = server_config.lease; + } + + /* Make sure we aren't just using the lease time from the previous offer */ + if (lease_time_align < server_config.min_lease) lease_time_align = server_config.lease; - } - - /* Make sure we aren't just using the lease time from the previous offer */ - if (lease_time_align < server_config.min_lease) - lease_time_align = server_config.lease; - } - /* ADDME: end of short circuit */ - else - { + /* ADDME: end of short circuit */ + } else { /* It is a static lease... use it */ packet.yiaddr = static_lease_ip; } |