proxy_protocol.h File Reference

This file contains PROXY protocol structs and functions. More...

#include "config.h"

Data Structures
struct	pp2_header
	PROXYv2 header. More...

Macros
#define	PP2_HEADER_SIZE   16
	PROXYv2 minimum header size.
#define	PP2_SIG   "\x0D\x0A\x0D\x0A\x00\x0D\x0A\x51\x55\x49\x54\x0A"
	PROXYv2 header signature.
#define	PP2_SIG_LEN   12
#define	PP2_VERSION   0x2
	PROXYv2 version (protocol value)

Enumerations
enum	pp2_command { PP2_CMD_LOCAL = 0x0 , PP2_CMD_PROXY = 0x1 }
	PROXYv2 command (protocol value).
enum	pp2_af { PP2_AF_UNSPEC = 0x0 , PP2_AF_INET = 0x1 , PP2_AF_INET6 = 0x2 , PP2_AF_UNIX = 0x3 }
	PROXYv2 address family (protocol value).
enum	pp2_protocol { PP2_PROT_UNSPEC = 0x0 , PP2_PROT_STREAM = 0x1 , PP2_PROT_DGRAM = 0x2 }
	PROXYv2 protocol (protocol value).
enum	pp2_af_protocol_combination {   PP2_UNSPEC_UNSPEC = (PP2_AF_UNSPEC<<4)|PP2_PROT_UNSPEC , PP2_INET_STREAM = (PP2_AF_INET<<4)|PP2_PROT_STREAM , PP2_INET_DGRAM = (PP2_AF_INET<<4)|PP2_PROT_DGRAM , PP2_INET6_STREAM = (PP2_AF_INET6<<4)|PP2_PROT_STREAM ,   PP2_INET6_DGRAM = (PP2_AF_INET6<<4)|PP2_PROT_DGRAM , PP2_UNIX_STREAM = (PP2_AF_UNIX<<4)|PP2_PROT_STREAM , PP2_UNIX_DGRAM = (PP2_AF_UNIX<<4)|PP2_PROT_DGRAM }
	Expected combinations of address family and protocol values used in checks.
enum	pp_parse_errors {   PP_PARSE_NOERROR = 0 , PP_PARSE_SIZE , PP_PARSE_WRONG_HEADERv2 , PP_PARSE_UNKNOWN_CMD ,   PP_PARSE_UNKNOWN_FAM_PROT }
	PROXY parse errors.

Functions
void	pp_init (void(*write_uint16)(void *buf, uint16_t data), void(*write_uint32)(void *buf, uint32_t data))
	Initialize the internal proxy structure. More...
const char *	pp_lookup_error (enum pp_parse_errors error)
	Lookup the parsing error description. More...
size_t	pp2_write_to_buf (uint8_t *buf, size_t buflen, struct sockaddr_in *src, int stream)
	Write a PROXYv2 header at the current position of the buffer. More...
int	pp2_read_header (uint8_t *buf, size_t buflen)
	Read a PROXYv2 header from the current position of the buffer. More...

Detailed Description

This file contains PROXY protocol structs and functions.

Only v2 is supported. TLVs are not currently supported.

Function Documentation

pp_init()

void pp_init	(	void(*)(void *buf, uint16_t data)	write_uint16,
		void(*)(void *buf, uint32_t data)	write_uint32
	)

Initialize the internal proxy structure.

Parameters

write_uint16	pointer to a function that can write uint16.
write_uint32	pointer to a function that can write uint32.

Referenced by main().

pp_lookup_error()

const char* pp_lookup_error

(

enum pp_parse_errors

error

)

Lookup the parsing error description.

Parameters

error

parsing error from pp2_read_header.

Returns

the description.

References error(), and pp_parse_errors_data.

Referenced by comm_point_tcp_handle_read(), and ssl_handle_read().

pp2_write_to_buf()

size_t pp2_write_to_buf	(	uint8_t *	buf,
		size_t	buflen,
		struct sockaddr_in *	src,
		int	stream
	)

Write a PROXYv2 header at the current position of the buffer.

Parameters

buf	pointer to the buffer to write data to.
buflen	available size on the buffer.
src	the source address.
stream	if the protocol is stream or datagram.

Returns

1 on success, 0 on failure.

References PP2_HEADER_SIZE, and PP2_SIG.

pp2_read_header()

int pp2_read_header	(	uint8_t *	buf,
		size_t	buflen
	)

Read a PROXYv2 header from the current position of the buffer.

It does initial validation and returns a pointer to the buffer position on success.

Parameters

buf	pointer to the buffer data to read from.
buflen	available size on the buffer.

Returns

parsing error, 0 on success.

References PP2_HEADER_SIZE.

Referenced by comm_point_tcp_handle_read(), consume_pp2_header(), and ssl_handle_read().