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dhcpv6_common.c File Reference
Functions common to DHCPv6 client, server and relay agent. More...
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Functions | |
| Dhcpv6StatusCode | dhcpv6GetStatusCode (const uint8_t *options, size_t length) |
| Retrieve status code. | |
| Dhcpv6Option * | dhcpv6AddOption (void *message, size_t *messageLength, uint16_t optionCode, const void *optionValue, size_t optionLength) |
| Add an option to a DHCPv6 message. | |
| Dhcpv6Option * | dhcpv6AddSubOption (Dhcpv6Option *baseOption, size_t *messageLength, uint16_t optionCode, const void *optionValue, size_t optionLength) |
| Add a suboption under an existing base option. | |
| Dhcpv6Option * | dhcpv6GetOption (const uint8_t *options, size_t optionsLength, uint16_t optionCode) |
| Find the specified option in a DHCPv6 message. | |
| int32_t | dhcpv6Rand (int32_t value) |
| Multiplication by a randomization factor. | |
| int32_t | dhcpv6RandRange (int32_t min, int32_t max) |
| Get a random value in the specified range. | |
Detailed Description
Functions common to DHCPv6 client, server and relay agent.
License
Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.
This file is part of CycloneTCP Open.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Description
The Dynamic Host Configuration Protocol for IPv6 enables DHCP servers to pass configuration parameters such as IPv6 network addresses to IPv6 nodes. This protocol is a stateful counterpart to IPv6 Stateless Address Autoconfiguration (RFC 2462), and can be used separately or concurrently with the latter to obtain configuration parameters. Refer to RFC 3315
- Version:
- 1.7.6
Definition in file dhcpv6_common.c.
Function Documentation
| Dhcpv6Option* dhcpv6AddOption | ( | void * | message, |
| size_t * | messageLength, | ||
| uint16_t | optionCode, | ||
| const void * | optionValue, | ||
| size_t | optionLength | ||
| ) |
Add an option to a DHCPv6 message.
- Parameters:
-
[in] message Pointer to the DHCPv6 message [in,out] messageLength Length of the overall DHCPv6 message [in] optionCode Option code [in] optionValue Option value [in] optionLength Length of the option value
- Returns:
- If the option was successfully added, a pointer to the freshly created option is returned. Otherwise NULL pointer is returned
Definition at line 109 of file dhcpv6_common.c.
| Dhcpv6Option* dhcpv6AddSubOption | ( | Dhcpv6Option * | baseOption, |
| size_t * | messageLength, | ||
| uint16_t | optionCode, | ||
| const void * | optionValue, | ||
| size_t | optionLength | ||
| ) |
Add a suboption under an existing base option.
- Parameters:
-
[in] baseOption Pointer to the base option [in,out] messageLength Length of the overall DHCPv6 message [in] optionCode Option code [in] optionValue Option value [in] optionLength Length of the option value
- Returns:
- If the option was successfully added, a pointer to the freshly created option is returned. Otherwise NULL pointer is returned
Definition at line 151 of file dhcpv6_common.c.
| Dhcpv6Option* dhcpv6GetOption | ( | const uint8_t * | options, |
| size_t | optionsLength, | ||
| uint16_t | optionCode | ||
| ) |
Find the specified option in a DHCPv6 message.
- Parameters:
-
[in] options Pointer to the Options field [in] optionsLength Length of the Options field [in] optionCode Code of the option to find
- Returns:
- If the specified option was found, a pointer to the corresponding option is returned. Otherwise NULL pointer is returned
Definition at line 204 of file dhcpv6_common.c.
| Dhcpv6StatusCode dhcpv6GetStatusCode | ( | const uint8_t * | options, |
| size_t | length | ||
| ) |
Retrieve status code.
This function returns a status indication related to the DHCPv6 message or option in which it appears
- Parameters:
-
[in] options Pointer to the Options field [in] length Length of the Options field
- Returns:
- Status code
Definition at line 68 of file dhcpv6_common.c.
| int32_t dhcpv6Rand | ( | int32_t | value ) |
Multiplication by a randomization factor.
Each of the computations of a new RT include a randomization factor RAND, which is a random number chosen with a uniform distribution between -0.1 and +0.1. The randomization factor is included to minimize synchronization of messages transmitted by DHCPv6 clients
- Parameters:
-
[in] value Input value
- Returns:
- Value resulting from the randomization process
Definition at line 248 of file dhcpv6_common.c.
| int32_t dhcpv6RandRange | ( | int32_t | min, |
| int32_t | max | ||
| ) |
Get a random value in the specified range.
- Parameters:
-
[in] min Lower bound [in] max Upper bound
- Returns:
- Random value in the specified range
Definition at line 263 of file dhcpv6_common.c.
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