c_ip.h File Reference

ROHC compression context for the IP-only profile. More...

#include "rohc_comp_rfc3095.h"

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Functions
rohc_packet_t	c_ip_decide_FO_packet (const struct rohc_comp_ctxt *const context)
	Decide which packet to send when in First Order (FO) state. More...
rohc_packet_t	c_ip_decide_SO_packet (const struct rohc_comp_ctxt *const context)
	Decide which packet to send when in Second Order (SO) state. More...
uint32_t	c_ip_get_next_sn (const struct rohc_comp_ctxt *const context, const struct rohc_pkt_hdrs *const uncomp_pkt_hdrs)
	Determine the SN value for the next packet. More...
int	c_ip_code_ir_remainder (const struct rohc_comp_ctxt *const context, uint8_t *const dest, const size_t dest_max_len, const size_t counter)
	Code the remainder header for the IR or IR-DYN packets. More...

Detailed Description

ROHC compression context for the IP-only profile.

Author

Didier Barvaux didie.nosp@m.r.ba.nosp@m.rvaux.nosp@m.@tou.nosp@m.louse.nosp@m..viv.nosp@m.eris..nosp@m.com

Function Documentation

c_ip_code_ir_remainder()

int c_ip_code_ir_remainder	(	const struct rohc_comp_ctxt *const	context,
		uint8_t *const	dest,
		const size_t	dest_max_len,
		const size_t	counter
	)

Code the remainder header for the IR or IR-DYN packets.

 Remainder of IR/IR-DYN packet (5.7.7.1):

      0   1   2   3   4   5   6   7
    +---+---+---+---+---+---+---+---+
 1  |             SN                |  2 octets if not RTP
    +---+---+---+---+---+---+---+---+

Parameters

context	The compression context
dest	The ROHC packet being coded
dest_max_len	The maximum length (in bytes) of the ROHC packet
counter	The current position in the ROHC buffer

Returns

The new position in ROHC buffer in case of success, -1 in case of failure

c_ip_decide_FO_packet()

rohc_packet_t c_ip_decide_FO_packet

(

const struct rohc_comp_ctxt *const

context

)

Decide which packet to send when in First Order (FO) state.

Packets that can be used are the IR-DYN and UO-2 packets.

See also

decide_packet

Parameters

context

The compression context

Returns

The packet type among ROHC_PACKET_IR_DYN and ROHC_PACKET_UOR_2

c_ip_decide_SO_packet()

rohc_packet_t c_ip_decide_SO_packet

(

const struct rohc_comp_ctxt *const

context

)

Decide which packet to send when in Second Order (SO) state.

Packets that can be used are the UO-0, UO-1 and UO-2 (with or without extensions) packets.

See also

decide_packet

Parameters

context

The compression context

Returns

The packet type among ROHC_PACKET_UO_0, ROHC_PACKET_UO_1 and ROHC_PACKET_UOR_2

c_ip_get_next_sn()

uint32_t c_ip_get_next_sn	(	const struct rohc_comp_ctxt *const	context,
		const struct rohc_pkt_hdrs *const	uncomp_pkt_hdrs
	)

Determine the SN value for the next packet.

Profile SN is an internal increasing 16-bit number.

Parameters

context	The compression context
uncomp_pkt_hdrs	The uncompressed headers to encode

Returns

The SN