WPA Supplicant - Layer2 packet handling with Linux packet sockets. More...
#include "includes.h"#include <sys/ioctl.h>#include <netpacket/packet.h>#include <net/if.h>#include "common.h"#include "eloop.h"#include "l2_packet.h"
Go to the source code of this file.
Data Structures | |
| struct | l2_packet_data |
Functions | |
| int | l2_packet_get_own_addr (struct l2_packet_data *l2, u8 *addr) |
| Get own layer 2 address. | |
| int | l2_packet_send (struct l2_packet_data *l2, const u8 *dst_addr, u16 proto, const u8 *buf, size_t len) |
| Send a packet. | |
| struct l2_packet_data * | l2_packet_init (const char *ifname, const u8 *own_addr, unsigned short protocol, void(*rx_callback)(void *ctx, const u8 *src_addr, const u8 *buf, size_t len), void *rx_callback_ctx, int l2_hdr) |
| Initialize l2_packet interface. | |
| void | l2_packet_deinit (struct l2_packet_data *l2) |
| Deinitialize l2_packet interface. | |
| int | l2_packet_get_ip_addr (struct l2_packet_data *l2, char *buf, size_t len) |
| Get the current IP address from the interface. | |
| void | l2_packet_notify_auth_start (struct l2_packet_data *l2) |
| Notify l2_packet about start of authentication. | |
WPA Supplicant - Layer2 packet handling with Linux packet sockets.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.
Alternatively, this software may be distributed under the terms of BSD license.
See README and COPYING for more details.
Definition in file l2_packet_linux.c.
| void l2_packet_deinit | ( | struct l2_packet_data * | l2 | ) |
Deinitialize l2_packet interface.
| l2 | Pointer to internal l2_packet data from l2_packet_init() |
Definition at line 154 of file l2_packet_linux.c.
| int l2_packet_get_ip_addr | ( | struct l2_packet_data * | l2, | |
| char * | buf, | |||
| size_t | len | |||
| ) |
Get the current IP address from the interface.
| l2 | Pointer to internal l2_packet data from l2_packet_init() | |
| buf | Buffer for the IP address in text format | |
| len | Maximum buffer length |
This function can be used to get the current IP address from the interface bound to the l2_packet. This is mainly for status information and the IP address will be stored as an ASCII string. This function is not essential for wpa_supplicant operation, so full implementation is not required. l2_packet implementation will need to define the function, but it can return -1 if the IP address information is not available.
Definition at line 168 of file l2_packet_linux.c.
| int l2_packet_get_own_addr | ( | struct l2_packet_data * | l2, | |
| u8 * | addr | |||
| ) |
Get own layer 2 address.
| l2 | Pointer to internal l2_packet data from l2_packet_init() | |
| addr | Buffer for the own address (6 bytes) |
Definition at line 39 of file l2_packet_linux.c.
| struct l2_packet_data* l2_packet_init | ( | const char * | ifname, | |
| const u8 * | own_addr, | |||
| unsigned short | protocol, | |||
| void(*)(void *ctx, const u8 *src_addr, const u8 *buf, size_t len) | rx_callback, | |||
| void * | rx_callback_ctx, | |||
| int | l2_hdr | |||
| ) | [read] |
Initialize l2_packet interface.
| ifname | Interface name | |
| own_addr | Optional own MAC address if available from driver interface or NULL if not available | |
| protocol | Ethernet protocol number in host byte order | |
| rx_callback | Callback function that will be called for each received packet | |
| rx_callback_ctx | Callback data (ctx) for calls to rx_callback() | |
| l2_hdr | 1 = include layer 2 header, 0 = do not include header |
rx_callback function will be called with src_addr pointing to the source address (MAC address) of the the packet. If l2_hdr is set to 0, buf points to len bytes of the payload after the layer 2 header and similarly, TX buffers start with payload. This behavior can be changed by setting l2_hdr=1 to include the layer 2 header in the data buffer.
Definition at line 94 of file l2_packet_linux.c.
| void l2_packet_notify_auth_start | ( | struct l2_packet_data * | l2 | ) |
Notify l2_packet about start of authentication.
| l2 | Pointer to internal l2_packet data from l2_packet_init() |
This function is called when authentication is expected to start, e.g., when association has been completed, in order to prepare l2_packet implementation for EAPOL frames. This function is used mainly if the l2_packet code needs to do polling in which case it can increasing polling frequency. This can also be an empty function if the l2_packet implementation does not benefit from knowing about the starting authentication.
Definition at line 199 of file l2_packet_linux.c.
| int l2_packet_send | ( | struct l2_packet_data * | l2, | |
| const u8 * | dst_addr, | |||
| u16 | proto, | |||
| const u8 * | buf, | |||
| size_t | len | |||
| ) |
Send a packet.
| l2 | Pointer to internal l2_packet data from l2_packet_init() | |
| dst_addr | Destination address for the packet (only used if l2_hdr == 0) | |
| proto | Protocol/ethertype for the packet in host byte order (only used if l2_hdr == 0) | |
| buf | Packet contents to be sent; including layer 2 header if l2_hdr was set to 1 in l2_packet_init() call. Otherwise, only the payload of the packet is included. | |
| len | Length of the buffer (including l2 header only if l2_hdr == 1) |
Definition at line 46 of file l2_packet_linux.c.
1.6.1