diff options
Diffstat (limited to 'src/plugins/dhcp/dhcp4_packet.c')
| -rw-r--r-- | src/plugins/dhcp/dhcp4_packet.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/plugins/dhcp/dhcp4_packet.c b/src/plugins/dhcp/dhcp4_packet.c new file mode 100644 index 00000000000..7592120ffea --- /dev/null +++ b/src/plugins/dhcp/dhcp4_packet.c @@ -0,0 +1,122 @@ +/* + * 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: + */ |