/* * dhcp4_packet.c: dhcp packet format functions * * Copyright (c) 2013 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <dhcp/dhcp4_packet.h> #include <vnet/ip/format.h> u8 * format_dhcp_packet_type (u8 * s, va_list * args) { dhcp_packet_type_t pt = va_arg (*args, dhcp_packet_type_t); switch (pt) { case DHCP_PACKET_DISCOVER: s = format (s, "discover"); break; case DHCP_PACKET_OFFER: s = format (s, "offer"); break; case DHCP_PACKET_REQUEST: s = format (s, "request"); break; case DHCP_PACKET_ACK: s = format (s, "ack"); break; case DHCP_PACKET_NAK: s = format (s, "nack"); break; } return (s); } u8 * format_dhcp_header (u8 * s, va_list * args) { dhcp_header_t *d = va_arg (*args, dhcp_header_t *); u32 max_bytes = va_arg (*args, u32); dhcp_option_t *o; u32 tmp; s = format (s, "opcode:%s", (d->opcode == 1 ? "request" : "reply")); s = format (s, " hw[type:%d addr-len:%d addr:%U]", d->hardware_type, d->hardware_address_length, format_hex_bytes, d->client_hardware_address, d->hardware_address_length); s = format (s, " hops%d", d->hops); s = format (s, " transaction-ID:0x%x", d->transaction_identifier); s = format (s, " seconds:%d", d->seconds); s = format (s, " flags:0x%x", d->flags); s = format (s, " client:%U", format_ip4_address, &d->client_ip_address); s = format (s, " your:%U", format_ip4_address, &d->your_ip_address); s = format (s, " server:%U", format_ip4_address, &d->server_ip_address); s = format (s, " gateway:%U", format_ip4_address, &d->gateway_ip_address); s = format (s, " cookie:%U", format_ip4_address, &d->magic_cookie); o = (dhcp_option_t *) d->options; while (o->option != 0xFF /* end of options */ && (u8 *) o < (u8 *) d + max_bytes) { switch (o->option) { case 53: /* dhcp message type */ tmp = o->data[0]; s = format (s, ", option-53: type:%U", format_dhcp_packet_type, tmp); break; case 54: /* dhcp server address */ s = format (s, ", option-54: server:%U", format_ip4_address, &o->data_as_u32[0]); break; case 58: /* lease renew time in seconds */ s = format (s, ", option-58: renewal:%d", clib_host_to_net_u32 (o->data_as_u32[0])); break; case 1: /* subnet mask */ s = format (s, ", option-1: subnet-mask:%d", clib_host_to_net_u32 (o->data_as_u32[0])); break; case 3: /* router address */ s = format (s, ", option-3: router:%U", format_ip4_address, &o->data_as_u32[0]); break; case 6: /* domain server address */ s = format (s, ", option-6: domian-server:%U", format_hex_bytes, o->data, o->length); break; case 12: /* hostname */ s = format (s, ", option-12: hostname:%U", format_hex_bytes, o->data, o->length); break; default: tmp = o->option; s = format (s, " option-%d: skipped", tmp); break; } o = (dhcp_option_t *) (((u8 *) o) + (o->length + 2)); } return (s); } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */