ROHC decompression context for the UDP profile. More...
#include "d_udp.h"#include "d_ip.h"#include "rohc_traces_internal.h"#include "rohc_bit_ops.h"#include "rohc_debug.h"#include "rohc_utils.h"#include "crc.h"#include "protocols/udp.h"#include <string.h>#include <assert.h>
Include dependency graph for d_udp.c:
Data Structures | |
| struct | d_udp_context |
| Define the UDP part of the decompression profile context. More... | |
Functions | |
| static bool | d_udp_create (const struct rohc_decomp_ctxt *const context, struct rohc_decomp_rfc3095_ctxt **const persist_ctxt, struct rohc_decomp_volat_ctxt *const volat_ctxt) |
| Create the UDP decompression context. More... | |
| static void | d_udp_destroy (struct rohc_decomp_rfc3095_ctxt *const rfc3095_ctxt, const struct rohc_decomp_volat_ctxt *const volat_ctxt) |
| Destroy the context. More... | |
| static int | udp_parse_dynamic_udp (const struct rohc_decomp_ctxt *const context, const uint8_t *packet, const size_t length, struct rohc_extr_bits *const bits) |
| Parse the UDP dynamic part of the ROHC packet. More... | |
| static int | udp_parse_uo_remainder (const struct rohc_decomp_ctxt *const context, const uint8_t *packet, unsigned int length, struct rohc_extr_bits *const bits) |
| Parse the UDP tail of the UO* ROHC packets. More... | |
| static bool | udp_decode_values_from_bits (const struct rohc_decomp_ctxt *context, const struct rohc_extr_bits *const bits, struct rohc_decoded_values *const decoded) |
| Decode UDP values from extracted bits. More... | |
| static int | udp_build_uncomp_udp (const struct rohc_decomp_ctxt *const context, const struct rohc_decoded_values *const decoded, uint8_t *const dest, const unsigned int payload_len) |
| Build an uncompressed UDP header. More... | |
| static void | udp_update_context (struct rohc_decomp_ctxt *const context, const struct rohc_decoded_values *const decoded) |
| Update context with decoded UDP values. More... | |
| int | udp_parse_static_udp (const struct rohc_decomp_ctxt *const context, const uint8_t *packet, size_t length, struct rohc_extr_bits *const bits) |
| Parse the UDP static part of the ROHC packet. More... | |
Variables | |
| const struct rohc_decomp_profile | d_udp_profile |
| Define the decompression part of the UDP profile as described in the RFC 3095. More... | |
Detailed Description
ROHC decompression context for the UDP profile.
Function Documentation
|
static |
Create the UDP decompression context.
This function is one of the functions that must exist in one profile for the framework to work.
- Parameters
-
context The main decompression context [out] persist_ctxt The persistent part of the decompression context [out] volat_ctxt The volatile part of the decompression context
- Returns
- true if the UDP context was successfully created, false if a problem occurred
|
static |
Destroy the context.
This function is one of the functions that must exist in one profile for the framework to work.
- Parameters
-
rfc3095_ctxt The persistent decompression context for the RFC3095 profiles volat_ctxt The volatile decompression context
|
static |
Build an uncompressed UDP header.
- Parameters
-
context The decompression context decoded The values decoded from the ROHC header dest The buffer to store the UDP header (MUST be at least of sizeof(struct udphdr) length) payload_len The length of the UDP payload
- Returns
- The length of the next header (ie. the UDP header), -1 in case of error
|
static |
Decode UDP values from extracted bits.
The following values are decoded:
- UDP source port
- UDP destination port
- UDP checksum
- Parameters
-
context The decompression context bits The extracted bits decoded OUT: The corresponding decoded values
- Returns
- true if decoding is successful, false otherwise
|
static |
Parse the UDP dynamic part of the ROHC packet.
- Parameters
-
context The decompression context packet The ROHC packet to parse length The length of the ROHC packet bits OUT: The bits extracted from the ROHC header
- Returns
- The number of bytes read in the ROHC packet, -1 in case of failure
| int udp_parse_static_udp | ( | const struct rohc_decomp_ctxt *const | context, |
| const uint8_t * | packet, | ||
| size_t | length, | ||
| struct rohc_extr_bits *const | bits | ||
| ) |
Parse the UDP static part of the ROHC packet.
- Parameters
-
context The decompression context packet The ROHC packet to parse length The length of the ROHC packet bits OUT: The bits extracted from the ROHC header
- Returns
- The number of bytes read in the ROHC packet, -1 in case of failure
|
static |
Parse the UDP tail of the UO* ROHC packets.
- Parameters
-
context The decompression context packet The ROHC packet to parse length The length of the ROHC packet bits OUT: The bits extracted from the ROHC header
- Returns
- The number of bytes read in the ROHC packet, -1 in case of failure
|
static |
Update context with decoded UDP values.
The following decoded values are updated in context:
- UDP source port
- UDP destination port
- UDP checksum present flag
- Parameters
-
context The decompression context decoded The decoded values to update in the context
Variable Documentation
| const struct rohc_decomp_profile d_udp_profile |
Initial value:
=
{
.id = ROHC_PROFILE_UDP,
.msn_max_bits = 16,
.new_context = (rohc_decomp_new_context_t) d_udp_create,
.free_context = (rohc_decomp_free_context_t) d_udp_destroy,
.detect_pkt_type = ip_detect_packet_type,
.parse_pkt = (rohc_decomp_parse_pkt_t) rfc3095_decomp_parse_pkt,
.decode_bits = (rohc_decomp_decode_bits_t) rfc3095_decomp_decode_bits,
.build_hdrs = (rohc_decomp_build_hdrs_t) rfc3095_decomp_build_hdrs,
.update_ctxt = (rohc_decomp_update_ctxt_t) rfc3095_decomp_update_ctxt,
.attempt_repair = (rohc_decomp_attempt_repair_t) rfc3095_decomp_attempt_repair,
.get_sn = rohc_decomp_rfc3095_get_sn,
}
bool rfc3095_decomp_decode_bits(const struct rohc_decomp_ctxt *const context, const struct rohc_extr_bits *const bits, const size_t payload_len, struct rohc_decoded_values *const decoded)
Decode values from extracted bits.
Definition: rohc_decomp_rfc3095.c:5604
static bool d_udp_create(const struct rohc_decomp_ctxt *const context, struct rohc_decomp_rfc3095_ctxt **const persist_ctxt, struct rohc_decomp_volat_ctxt *const volat_ctxt)
Create the UDP decompression context.
Definition: d_udp.c:109
bool rfc3095_decomp_attempt_repair(const struct rohc_decomp *const decomp, const struct rohc_decomp_ctxt *const context, const struct rohc_ts pkt_arrival_time, struct rohc_decomp_crc_corr_ctxt *const crc_corr, struct rohc_extr_bits *const extr_bits)
Attempt a packet/context repair upon CRC failure.
Definition: rohc_decomp_rfc3095.c:5407
uint32_t rohc_decomp_rfc3095_get_sn(const struct rohc_decomp_ctxt *const context)
Get the reference SN value of the context.
Definition: rohc_decomp_rfc3095.c:1354
bool(* rohc_decomp_attempt_repair_t)(const struct rohc_decomp *const decomp, const struct rohc_decomp_ctxt *const context, const struct rohc_ts pkt_arrival_time, struct rohc_decomp_crc_corr_ctxt *const crc_corr, void *const extr_bits)
Definition: rohc_decomp_internals.h:386
bool(* rohc_decomp_decode_bits_t)(const struct rohc_decomp_ctxt *const context, const void *const extr_bits, const size_t payload_len, void *const decoded_values)
Definition: rohc_decomp_internals.h:364
bool(* rohc_decomp_new_context_t)(const struct rohc_decomp_ctxt *const context, void **const persist_ctxt, struct rohc_decomp_volat_ctxt *const volat_ctxt)
Definition: rohc_decomp_internals.h:340
static void d_udp_destroy(struct rohc_decomp_rfc3095_ctxt *const rfc3095_ctxt, const struct rohc_decomp_volat_ctxt *const volat_ctxt)
Destroy the context.
Definition: d_udp.c:219
bool rfc3095_decomp_parse_pkt(const struct rohc_decomp_ctxt *const context, const struct rohc_buf rohc_packet, const size_t large_cid_len, rohc_packet_t *const packet_type, struct rohc_decomp_crc *const extr_crc, struct rohc_extr_bits *const bits, size_t *const rohc_hdr_len)
Parse one IR, IR-DYN, UO-0, UO-1*, or UOR-2* packet.
Definition: rohc_decomp_rfc3095.c:536
void rfc3095_decomp_update_ctxt(struct rohc_decomp_ctxt *const context, const struct rohc_decoded_values *const decoded, const size_t payload_len, bool *const do_change_mode)
Update context with decoded values.
Definition: rohc_decomp_rfc3095.c:6110
void(* rohc_decomp_free_context_t)(void *const persist_ctxt, const struct rohc_decomp_volat_ctxt *const volat_ctxt)
Definition: rohc_decomp_internals.h:345
rohc_packet_t ip_detect_packet_type(const struct rohc_decomp_ctxt *const context, const uint8_t *const rohc_packet, const size_t rohc_length, const size_t large_cid_len)
Detect the type of ROHC packet for IP-based non-RTP profiles.
Definition: d_ip.c:137
bool(* rohc_decomp_parse_pkt_t)(const struct rohc_decomp_ctxt *const context, const struct rohc_buf rohc_packet, const size_t large_cid_len, rohc_packet_t *const packet_type, struct rohc_decomp_crc *const extr_crc, void *const extr_bits, size_t *const rohc_hdr_len)
Definition: rohc_decomp_internals.h:355
rohc_status_t rfc3095_decomp_build_hdrs(const struct rohc_decomp *const decomp, const struct rohc_decomp_ctxt *const context, const rohc_packet_t packet_type, const struct rohc_decomp_crc *const extr_crc, const struct rohc_decoded_values *const decoded, const size_t payload_len, struct rohc_buf *const uncomp_hdrs, size_t *const uncomp_hdrs_len)
Build the uncompressed headers.
Definition: rohc_decomp_rfc3095.c:4961
Definition: rohc.h:219
void(* rohc_decomp_update_ctxt_t)(struct rohc_decomp_ctxt *const context, const void *const decoded_values, const size_t payload_len, bool *const do_change_mode)
Definition: rohc_decomp_internals.h:380
rohc_status_t(* rohc_decomp_build_hdrs_t)(const struct rohc_decomp *const decomp, const struct rohc_decomp_ctxt *const context, const rohc_packet_t packet_type, const struct rohc_decomp_crc *const extr_crc, const void *const decoded_values, const size_t payload_len, struct rohc_buf *const uncomp_hdrs, size_t *const uncomp_hdrs_len)
Definition: rohc_decomp_internals.h:370
Define the decompression part of the UDP profile as described in the RFC 3095.
