| 1 |
/* |
| 2 |
ROHC Project 2003 at Lulea University of Technology, Sweden. |
| 3 |
Authors: Andreas Vernersson <andver-8@student.luth.se> |
| 4 |
Daniel Pettersson <danpet-7@student.luth.se> |
| 5 |
Erik Soderstrom <soderstrom@yahoo.com> |
| 6 |
Fredrik Lindstrom <frelin-9@student.luth.se> |
| 7 |
Johan Stenmark <johste-8@student.luth.se> |
| 8 |
Martin Juhlin <juhlin@users.sourceforge.net> |
| 9 |
Mikael Larsson <larmik-9@student.luth.se> |
| 10 |
Robert Maxe <robmax-1@student.luth.se> |
| 11 |
|
| 12 |
Copyright (C) 2003 Andreas Vernersson, Daniel Pettersson, |
| 13 |
Erik Soderström, Fredrik Lindström, Johan Stenmark, |
| 14 |
Martin Juhlin, Mikael Larsson, Robert Maxe. |
| 15 |
|
| 16 |
This program is free software; you can redistribute it and/or modify |
| 17 |
it under the terms of the GNU General Public License as published by |
| 18 |
the Free Software Foundation; either version 2 of the License, or |
| 19 |
(at your option) any later version. |
| 20 |
|
| 21 |
This program is distributed in the hope that it will be useful, |
| 22 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 24 |
GNU General Public License for more details. |
| 25 |
|
| 26 |
You should have received a copy of the GNU General Public License |
| 27 |
along with this program; if not, write to the Free Software |
| 28 |
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 29 |
*/ |
| 30 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 31 |
#include "decomp.h" |
| 32 |
#include "d_ip.h" |
| 33 |
#include "d_udp.h" |
| 34 |
#include "d_uncompressed.h" |
| 35 |
#include "d_udp_lite.h" |
| 36 |
#include "feedback.h" |
| 37 |
|
| 38 |
#include "c_util.h" |
| 39 |
|
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//---------------------------------------------------------------------------------------------------------------------------------- |
| 41 |
extern struct s_profile d_udplite_profile, d_udp_profile, d_ip_profile, d_uncomp_profile; |
| 42 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 43 |
static struct s_profile *d_profiles[D_NUM_PROFILES] = { |
| 44 |
&d_udplite_profile, |
| 45 |
&d_udp_profile, |
| 46 |
&d_ip_profile, |
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&d_uncomp_profile |
| 48 |
}; |
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//---------------------------------------------------------------------------------------------------------------------------------- |
| 50 |
static struct s_profile * find_profile(int id); |
| 51 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 52 |
// Increases the context array size in sizes of 2^x (max 16384) |
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// Param state: pointer to decompressor |
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// Param highest cid: cid to adapt context array size with |
| 55 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 56 |
void context_array_increase(struct sd_rohc * state, int highestcid) |
| 57 |
{ |
| 58 |
struct sd_context ** pnew; |
| 59 |
int calcsize, i; |
| 60 |
|
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for(i=4; i<15; i++) { // calculate new size of array |
| 62 |
calcsize = 1<<i; |
| 63 |
if(highestcid < calcsize) |
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break; |
| 65 |
} |
| 66 |
pnew = (struct sd_context**)kmalloc(sizeof(struct sd_context*) * calcsize, GFP_ATOMIC); // allocate new array |
| 67 |
if(!pnew) { |
| 68 |
rohc_debugf(0,"[ERROR] context_array_increase(): unable to allocate memory!\n"); |
| 69 |
return; |
| 70 |
} |
| 71 |
for(i=0; i<calcsize; i++) // reset all new pointers to NULL |
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pnew[i] = NULL; |
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for(i=0; i<state->context_array_size; i++) // copy all pointers |
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pnew[i] = state->context[i]; |
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state->context_array_size = calcsize; |
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kfree(state->context); |
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state->context = pnew; |
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} |
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//---------------------------------------------------------------------------------------------------------------------------------- |
| 80 |
// Decreases the context array size in sizes of 2^x (min 16) |
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// Param state: pointer to decompressor |
| 82 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 83 |
void context_array_decrease(struct sd_rohc * state) |
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{ |
| 85 |
struct sd_context ** pnew; |
| 86 |
int highestcid=0, calcsize, i; |
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|
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for(i=state->context_array_size-1; i>=0; i--) // search for the highest cid (from the end and backwards) |
| 89 |
if(state->context[i]) { |
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highestcid = i; |
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break; |
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} |
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for(i=4; i<15; i++) { // calculate new size of array |
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calcsize = 1<<i; |
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if(highestcid < calcsize) |
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break; |
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} |
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pnew = (struct sd_context **)kmalloc(sizeof(struct sd_context*) * calcsize, GFP_ATOMIC); // allocate new array |
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if(!pnew) { |
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rohc_debugf(0,"[ERROR] context_array_decrease(): unable to allocate memory!\n"); |
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return; |
| 102 |
} |
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for(i=0; i<calcsize; i++) // reset all new pointers to NULL |
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pnew[i] = NULL; |
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for(i=0; i<=highestcid; i++) // copy all pointers |
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pnew[i] = state->context[i]; |
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|
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state->context_array_size = calcsize; |
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kfree(state->context); |
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state->context = pnew; |
| 111 |
} |
| 112 |
//---------------------------------------------------------------------------------------------------------------------------------- |
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// Finds a specific context |
| 114 |
// Param state: pointer to decompressor |
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// Param cid: context-id to find in array |
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// Return: pointer to context if found, else NULL |
| 117 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 118 |
struct sd_context * find_context(struct sd_rohc * state, int cid) |
| 119 |
{ |
| 120 |
if(cid < state->context_array_size) // cid must not be equal or larger than the context array size |
| 121 |
return(state->context[cid]); |
| 122 |
|
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return(NULL); |
| 124 |
} |
| 125 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 126 |
// Create and allocate a new context with profile specific data |
| 127 |
// Param state: pointer to decompressor |
| 128 |
// Param with_cid: context-id (not used for now) |
| 129 |
// Param profile: profile to be assigned with context |
| 130 |
// Return: pointer to new context if allocatable, else NULL |
| 131 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 132 |
struct sd_context * context_create(struct sd_rohc * state, int with_cid, struct s_profile * profile) |
| 133 |
{ |
| 134 |
struct sd_context * pnew = (struct sd_context*)kmalloc(sizeof(struct sd_context), GFP_ATOMIC); |
| 135 |
if(!pnew) { |
| 136 |
rohc_debugf(0,"[ERROR] context_create(): unable to allocate memory!\n"); |
| 137 |
return(NULL); |
| 138 |
} |
| 139 |
pnew->profile = profile; |
| 140 |
pnew->mode = ROHC_U_MODE; |
| 141 |
pnew->state = ROHC_NO_CONTEXT; |
| 142 |
pnew->data = profile->allocate_decode_data(); |
| 143 |
if(!pnew->data) { |
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kfree(pnew); |
| 145 |
return(NULL); |
| 146 |
} |
| 147 |
pnew->curval = 0; |
| 148 |
|
| 149 |
pnew->num_recv_packets = 0; |
| 150 |
pnew->total_uncompressed_size = 0; |
| 151 |
pnew->total_compressed_size = 0; |
| 152 |
pnew->header_uncompressed_size = 0; |
| 153 |
pnew->header_compressed_size = 0; |
| 154 |
pnew->num_recv_ir = 0; |
| 155 |
pnew->num_recv_ir_dyn = 0; |
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pnew->num_sent_feedbacks = 0; |
| 157 |
pnew->num_decomp_failures = 0; |
| 158 |
pnew->num_decomp_repairs = 0; |
| 159 |
|
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pnew->first_used = get_milliseconds(); |
| 161 |
pnew->latest_used = get_milliseconds(); |
| 162 |
|
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pnew->total_16_uncompressed = c_create_wlsb(32, 16, 0); // create a window with 16 entries.. |
| 164 |
pnew->total_16_compressed = c_create_wlsb(32, 16, 0); |
| 165 |
pnew->header_16_uncompressed = c_create_wlsb(32, 16, 0); |
| 166 |
pnew->header_16_compressed = c_create_wlsb(32, 16, 0); |
| 167 |
|
| 168 |
return(pnew); |
| 169 |
} |
| 170 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 171 |
// Free a context and the profile specific data within |
| 172 |
// Param context: context to free |
| 173 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 174 |
void context_free(struct sd_context * context) |
| 175 |
{ |
| 176 |
if(!context) |
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return; |
| 178 |
|
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context->profile->free_decode_data(context->data); |
| 180 |
|
| 181 |
c_destroy_wlsb(context->total_16_uncompressed); |
| 182 |
c_destroy_wlsb(context->total_16_compressed); |
| 183 |
c_destroy_wlsb(context->header_16_uncompressed); |
| 184 |
c_destroy_wlsb(context->header_16_compressed); |
| 185 |
|
| 186 |
kfree(context); |
| 187 |
} |
| 188 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 189 |
// Create and allocate a ROHC-decompressor |
| 190 |
// Param compressor: pointer to ROHC-compressor |
| 191 |
// Return: pointer to the newly allocated decompressor |
| 192 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 193 |
struct sd_rohc * rohc_alloc_decompressor(struct sc_rohc * compressor) |
| 194 |
{ |
| 195 |
struct s_medium medium = {ROHC_SMALL_CID, 15 }; //, 3}; |
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struct sd_rohc * pnew = (struct sd_rohc *)kmalloc(sizeof(struct sd_rohc), GFP_ATOMIC); |
| 197 |
if(!pnew) { |
| 198 |
rohc_debugf(0,"[ERROR] rohc_alloc_decompressor(): unable to allocate memory!\n"); |
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return(NULL); |
| 200 |
} |
| 201 |
pnew->medium = (struct s_medium*)kmalloc(sizeof(struct s_medium), GFP_ATOMIC); |
| 202 |
if (!pnew->medium) { |
| 203 |
rohc_debugf(0,"[ERROR] rohc_alloc_decompressor(): unable to allocate memory (2)!\n"); |
| 204 |
kfree(pnew); |
| 205 |
return(NULL); |
| 206 |
} |
| 207 |
memcpy(pnew->medium, &medium, sizeof(struct s_medium)); |
| 208 |
|
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pnew->compressor = compressor; |
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|
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pnew->context_array_size = 0; // must be zero |
| 212 |
pnew->context = NULL; // must be NULL |
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context_array_increase(pnew, 0); // initialize array of size 16 |
| 214 |
|
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pnew->maxval = 300; |
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pnew->errval = 100; |
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pnew->okval = 12; |
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pnew->curval = 0; |
| 219 |
|
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clear_statistics(pnew); |
| 221 |
|
| 222 |
return(pnew); |
| 223 |
} |
| 224 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 225 |
// Free and deallocate a ROHC-decompressor |
| 226 |
// Param state: pointer to the ROHC-decompressor to free |
| 227 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 228 |
void rohc_free_decompressor(struct sd_rohc * state) |
| 229 |
{ |
| 230 |
int i; |
| 231 |
|
| 232 |
for(i=0; i<state->context_array_size; i++) |
| 233 |
if(state->context[i]) |
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context_free(state->context[i]); |
| 235 |
kfree(state->context); |
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kfree(state->medium); |
| 237 |
kfree(state); |
| 238 |
} |
| 239 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 240 |
// Main function for decompressing a ROHC-packet |
| 241 |
// Param state: pointer to decompressor |
| 242 |
// Param ibuf: pointer to incoming packet |
| 243 |
// Param isize: size of incoming packet |
| 244 |
// Param obuf: pointer to output buffer |
| 245 |
// Param osize: size of output buffer |
| 246 |
// Return: size of decompressed packet |
| 247 |
//TODO: kolla upp s�ingen annan anropar d_decode_header DIREKT, anropen m�te ske till denna funktion, annars funkar inte statistik och feedback!! |
| 248 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 249 |
int rohc_decompress(struct sd_rohc * state, unsigned char * ibuf, int isize, unsigned char * obuf, int osize) |
| 250 |
{ |
| 251 |
int ret; |
| 252 |
struct sd_decode_data ddata = { -1, 0, 0, NULL }; // { cid, addcidUsed, largecidUsed, sd_context * active } |
| 253 |
|
| 254 |
state->statistics.packets_received++; |
| 255 |
ret = d_decode_header(state, ibuf, isize, obuf, osize, &ddata); |
| 256 |
if(ddata.active == NULL && (ret == ROHC_ERROR_PACKAGE_FAILED || ret == ROHC_ERROR || ret == ROHC_ERROR_CRC)) |
| 257 |
ret = ROHC_ERROR_NO_CONTEXT; |
| 258 |
|
| 259 |
if (ddata.active) { |
| 260 |
ddata.active->num_recv_packets ++; |
| 261 |
rohc_debugf(2,"State in decomp %d\n",ddata.active->state ); |
| 262 |
} |
| 263 |
|
| 264 |
if (ret >= 0) { |
| 265 |
if (!ddata.active) { |
| 266 |
rohc_debugf(1, "decompress: ddata.active == null when ret >=0!\n"); |
| 267 |
} else { |
| 268 |
struct sd_context *c = ddata.active; |
| 269 |
c->total_uncompressed_size += ret; |
| 270 |
c->total_compressed_size += isize; |
| 271 |
|
| 272 |
if (state->compressor) { |
| 273 |
state->compressor->num_packets ++; |
| 274 |
state->compressor->total_uncompressed_size += ret; |
| 275 |
state->compressor->total_compressed_size += isize; |
| 276 |
} |
| 277 |
|
| 278 |
c_add_wlsb(c->total_16_uncompressed, 0, 0, ret); |
| 279 |
c_add_wlsb(c->total_16_compressed, 0,0, isize); |
| 280 |
} |
| 281 |
} else if (ddata.active) { |
| 282 |
ddata.active->num_decomp_failures ++; |
| 283 |
} |
| 284 |
|
| 285 |
//return ret; |
| 286 |
|
| 287 |
switch(ret) |
| 288 |
{ |
| 289 |
case ROHC_ERROR_PACKAGE_FAILED: |
| 290 |
case ROHC_ERROR: |
| 291 |
state->statistics.packets_failed_package++; |
| 292 |
ddata.active->curval += state->errval; |
| 293 |
if(ddata.active->curval >= state->maxval) { |
| 294 |
ddata.active->curval = 0; |
| 295 |
d_operation_mode_feedback(state, ROHC_ERROR_PACKAGE_FAILED, ddata.cid, ddata.addcidUsed, ddata.largecidUsed, ddata.active->mode, ddata.active); |
| 296 |
} |
| 297 |
break; |
| 298 |
|
| 299 |
case ROHC_ERROR_NO_CONTEXT: |
| 300 |
state->statistics.packets_failed_no_context++; |
| 301 |
state->curval += state->errval; |
| 302 |
if(state->curval >= state->maxval) { |
| 303 |
state->curval = 0; |
| 304 |
d_operation_mode_feedback(state, ROHC_ERROR_NO_CONTEXT, ddata.cid, ddata.addcidUsed, ddata.largecidUsed, ROHC_O_MODE, NULL); |
| 305 |
} |
| 306 |
break; |
| 307 |
|
| 308 |
case ROHC_FEEDBACK_ONLY: |
| 309 |
state->statistics.packets_feedback++; |
| 310 |
break; |
| 311 |
|
| 312 |
case ROHC_ERROR_CRC: |
| 313 |
state->statistics.packets_failed_crc++; |
| 314 |
ddata.active->curval += state->errval; |
| 315 |
rohc_debugf(2,"feedback curr %d\n", ddata.active->curval); |
| 316 |
rohc_debugf(2,"feedback max %d\n", state->maxval); |
| 317 |
if(ddata.active->curval >= state->maxval) { |
| 318 |
ddata.active->curval = 0; |
| 319 |
d_operation_mode_feedback(state, ROHC_ERROR_CRC, ddata.cid, ddata.addcidUsed, ddata.largecidUsed, ddata.active->mode, ddata.active); |
| 320 |
} |
| 321 |
break; |
| 322 |
|
| 323 |
default: // ROHC_OK_NO_DATA, ROHC_OK |
| 324 |
state->curval -= state->okval; // framework (S-NACK) |
| 325 |
ddata.active->curval -= state->okval; // context (NACK) |
| 326 |
rohc_debugf(2,"feedback curr %d\n", ddata.active->curval); |
| 327 |
if(state->curval < 0) |
| 328 |
state->curval = 0; |
| 329 |
|
| 330 |
if(ddata.active->curval < 0) |
| 331 |
ddata.active->curval = 0; |
| 332 |
|
| 333 |
rohc_debugf(2,"feedback curr %d\n", ddata.active->curval); |
| 334 |
if(ddata.active->mode == ROHC_U_MODE) { |
| 335 |
ddata.active->mode = ROHC_O_MODE; // switch active context to o-mode |
| 336 |
d_operation_mode_feedback(state, ROHC_OK, ddata.cid, ddata.addcidUsed, ddata.largecidUsed, ddata.active->mode, ddata.active); |
| 337 |
} |
| 338 |
break; |
| 339 |
} |
| 340 |
return(ret); |
| 341 |
} |
| 342 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 343 |
// To decompress both large and small cid package |
| 344 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 345 |
int rohc_decompress_both(struct sd_rohc * state, unsigned char * ibuf, int isize, unsigned char * obuf, int osize, int large) |
| 346 |
{ |
| 347 |
state->medium->cid_type = large ? ROHC_LARGE_CID : ROHC_SMALL_CID; |
| 348 |
|
| 349 |
return rohc_decompress(state, ibuf, isize, obuf, osize); |
| 350 |
} |
| 351 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 352 |
// Decode feedback and context-id if it exist |
| 353 |
// Param state: pointer to decompressor |
| 354 |
// Param walk: pointer to incoming packet |
| 355 |
// Param isize: size of incoming packet |
| 356 |
// Return: context-id if found, else rohc_feedback_only |
| 357 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 358 |
int d_decode_feedback_first(struct sd_rohc * state, unsigned char ** walk, const int isize) |
| 359 |
{ |
| 360 |
int cid = 0, i, fbloop = 1; |
| 361 |
unsigned char * startpos = *walk; |
| 362 |
|
| 363 |
for(i=0; i<isize; i++) // remove all padded octets |
| 364 |
if(d_is_paddning(*walk)) |
| 365 |
(*walk)++; |
| 366 |
else |
| 367 |
break; |
| 368 |
while(fbloop) { |
| 369 |
fbloop = 0; |
| 370 |
if(d_is_add_cid(*walk)) { // if addcid - extract value |
| 371 |
cid = d_decode_add_cid(*walk); |
| 372 |
(*walk)++; |
| 373 |
} |
| 374 |
if(d_is_feedback(*walk)) { // is it feedback? |
| 375 |
if(cid>0) |
| 376 |
return(ROHC_ERROR_NO_CONTEXT); |
| 377 |
else |
| 378 |
*walk += d_decode_feedback(state, *walk); |
| 379 |
fbloop = 1; // feedback found, keep looping |
| 380 |
} |
| 381 |
if((*walk)-startpos >= isize) // end of package |
| 382 |
return(ROHC_FEEDBACK_ONLY); |
| 383 |
} |
| 384 |
return(cid); |
| 385 |
} |
| 386 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 387 |
// Main function for decompressing a ROHC-packet. |
| 388 |
// Param state: pointer to decompressor |
| 389 |
// Param ibuf: pointer to incoming packet |
| 390 |
// Param isize: size of incoming packet |
| 391 |
// Param obuf: pointer to output buffer |
| 392 |
// Param osize: size of output buffer |
| 393 |
// Param ddata: struct that holds important information to pass between several functions |
| 394 |
// Return: size of decompressed packet |
| 395 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 396 |
int d_decode_header(struct sd_rohc * state, unsigned char * ibuf, int isize, unsigned char * obuf, int osize, struct sd_decode_data * ddata) |
| 397 |
{ |
| 398 |
int largecid=0, size, irdynvar=0, casenew=0; |
| 399 |
|
| 400 |
struct s_profile * profile; |
| 401 |
unsigned char * walk = ibuf; |
| 402 |
|
| 403 |
if(isize < 2) |
| 404 |
return(ROHC_ERROR_NO_CONTEXT); |
| 405 |
ddata->cid = d_decode_feedback_first(state, &walk, isize); |
| 406 |
if(ddata->cid == ROHC_FEEDBACK_ONLY || ddata->cid == ROHC_ERROR_NO_CONTEXT) |
| 407 |
return(ddata->cid); |
| 408 |
|
| 409 |
if(ddata->cid > 0 && state->medium->cid_type == ROHC_SMALL_CID) |
| 410 |
ddata->addcidUsed=1; |
| 411 |
|
| 412 |
if(!ddata->addcidUsed && state->medium->cid_type == ROHC_LARGE_CID) { // check if large cids are used |
| 413 |
largecid = d_sdvalue_size(walk+1); |
| 414 |
if(largecid >0 && largecid < 3) { |
| 415 |
ddata->cid = d_sdvalue_decode(walk+1); |
| 416 |
ddata->largecidUsed=1; |
| 417 |
} else |
| 418 |
return(ROHC_ERROR_NO_CONTEXT); |
| 419 |
} |
| 420 |
|
| 421 |
if(d_is_ir(walk)) { |
| 422 |
profile = find_profile(walk[largecid+1]); |
| 423 |
|
| 424 |
if(!rohc_ir_packet_crc_ok(walk, largecid, ddata->addcidUsed, profile)) |
| 425 |
return(ROHC_ERROR_CRC); |
| 426 |
|
| 427 |
if(ddata->cid >= state->context_array_size) |
| 428 |
context_array_increase(state, ddata->cid); |
| 429 |
|
| 430 |
if(state->context[ddata->cid] && state->context[ddata->cid]->profile == profile) { |
| 431 |
ddata->active = state->context[ddata->cid]; |
| 432 |
state->context[ddata->cid] = NULL; |
| 433 |
} else { |
| 434 |
casenew=1; |
| 435 |
ddata->active = context_create(state, ddata->cid, profile); |
| 436 |
if(!ddata->active) |
| 437 |
return(ROHC_ERROR_NO_CONTEXT); |
| 438 |
} |
| 439 |
|
| 440 |
ddata->active->num_recv_ir ++; |
| 441 |
size = ddata->active->profile->decode_ir(state, ddata->active, walk+largecid+3, (isize-(walk-ibuf))-3-largecid, GET_BIT_0(walk), obuf); |
| 442 |
if(size>0) { |
| 443 |
context_free(state->context[ddata->cid]); |
| 444 |
state->context[ddata->cid] = ddata->active; |
| 445 |
return(size); |
| 446 |
} |
| 447 |
if(casenew) |
| 448 |
context_free(ddata->active); |
| 449 |
else |
| 450 |
state->context[ddata->cid] = ddata->active; |
| 451 |
|
| 452 |
return(size); |
| 453 |
} else { |
| 454 |
ddata->active = find_context(state, ddata->cid); // find context |
| 455 |
if(ddata->active && ddata->active->profile) { // context is valid |
| 456 |
ddata->active->latest_used = get_milliseconds(); |
| 457 |
if(d_is_irdyn(walk)) { |
| 458 |
ddata->active->num_recv_ir_dyn ++; |
| 459 |
profile = find_profile(walk[largecid+1]); |
| 460 |
if(profile != ddata->active->profile) { // if IR-DYN changes profile, make comp. transit to NO_CONTEXT-state |
| 461 |
state->curval = state->maxval; |
| 462 |
rohc_debugf(2,"IR-DYN changed profile, sending S-NACK.\n"); |
| 463 |
return(ROHC_ERROR_NO_CONTEXT); |
| 464 |
} |
| 465 |
if(!rohc_ir_dyn_packet_crc_ok(walk, largecid, ddata->addcidUsed, profile, ddata->active)) |
| 466 |
return(ROHC_ERROR_CRC); |
| 467 |
irdynvar += 2; |
| 468 |
} |
| 469 |
return(ddata->active->profile->decode(state, ddata->active, walk, (isize-(walk-ibuf)), (ddata->largecidUsed ? (1+largecid+irdynvar) : 1+irdynvar), obuf)); |
| 470 |
} else |
| 471 |
return(ROHC_ERROR_NO_CONTEXT); |
| 472 |
} |
| 473 |
return(ROHC_ERROR_NO_CONTEXT); |
| 474 |
} |
| 475 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 476 |
// Decode the Feedback |
| 477 |
// Param state: pointer to decompressor |
| 478 |
// Param ibuf: pointer to incoming packet |
| 479 |
// Return: feedback size including feedback head |
| 480 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 481 |
int d_decode_feedback(struct sd_rohc * state, unsigned char * ibuf) |
| 482 |
{ |
| 483 |
int feedbacksize, head; |
| 484 |
feedbacksize = d_feedback_size(ibuf); // extract the size of the feedback |
| 485 |
head = d_feedback_headersize(ibuf); // point to feedback data |
| 486 |
ibuf += head; |
| 487 |
#ifdef USER_SPACE |
| 488 |
feedbackRedir(ibuf, feedbacksize); // if user space application is running, send feedback to it.. |
| 489 |
#else |
| 490 |
//passFeedback(ibuf, feedbacksize); // ..else pass it on to the compressor |
| 491 |
if (state->compressor) |
| 492 |
c_deliver_feedback(state->compressor, ibuf, feedbacksize); |
| 493 |
#endif |
| 494 |
|
| 495 |
return(feedbacksize + head); |
| 496 |
} |
| 497 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 498 |
// Find profile with a certain id |
| 499 |
// Param id: profile id to find |
| 500 |
// Return: pointer to the matching profile |
| 501 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 502 |
struct s_profile * find_profile(int id) |
| 503 |
{ |
| 504 |
if(id==0) |
| 505 |
return uncompressed_profile_create(); |
| 506 |
else if(id==2) |
| 507 |
return udp_profile_create(); |
| 508 |
else if(id==4) |
| 509 |
return iponly_profile_create(); |
| 510 |
else if(id==8) |
| 511 |
return udp_lite_profile_create(); |
| 512 |
else |
| 513 |
return uncompressed_profile_create(); |
| 514 |
} |
| 515 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 516 |
// CRC check on IR-packets |
| 517 |
// Param walk: pointer to incoming packet |
| 518 |
// Param largecid: largecid value |
| 519 |
// Param addcidUsed: value of addcidUsed, if 1 then addcid is used, else 0 |
| 520 |
// Param profile: pointer to profile of packet |
| 521 |
// Return: 1 if CRC is OK, else 0 |
| 522 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 523 |
int rohc_ir_packet_crc_ok(unsigned char * walk, const int largecid, const int addcidUsed, const struct s_profile * profile) |
| 524 |
{ |
| 525 |
int realcrc, crc; |
| 526 |
|
| 527 |
realcrc = walk[largecid+2]; |
| 528 |
walk[largecid+2] = 0; |
| 529 |
if(profile->id==0) |
| 530 |
crc = crc_calculate(CRC_TYPE_8, walk-addcidUsed, profile->detect_ir_size(walk, largecid+1)+2+largecid+addcidUsed); |
| 531 |
else |
| 532 |
crc = crc_calculate(CRC_TYPE_8, walk-addcidUsed, profile->detect_ir_size(walk, largecid+1)+3+largecid+addcidUsed); |
| 533 |
walk[largecid+2] = realcrc; |
| 534 |
if(crc != realcrc) { |
| 535 |
rohc_debugf(0,"ROHC Decompress IR: CRC FAILED! SKA: %i, �: %i\n", realcrc, crc); |
| 536 |
return(0); |
| 537 |
} |
| 538 |
rohc_debugf(2,"ROHC Decompress IR: CRC OK!\n"); |
| 539 |
|
| 540 |
return(1); |
| 541 |
} |
| 542 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 543 |
// CRC check on IR-DYN packets |
| 544 |
// Param walk: pointer to incoming packet |
| 545 |
// Param largecid: largecid value' |
| 546 |
// Param addcidUsed: value of addcidUsed' |
| 547 |
// Param profile: pointer to profile of packet |
| 548 |
// Return: 1 if CRC is OK, else 0 |
| 549 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 550 |
int rohc_ir_dyn_packet_crc_ok(unsigned char * walk, const int largecid, const int addcidUsed, const struct s_profile * profile, struct sd_context * context) |
| 551 |
{ |
| 552 |
int realcrc, crc; |
| 553 |
|
| 554 |
realcrc = walk[largecid+2]; |
| 555 |
walk[largecid+2] = 0; |
| 556 |
crc = crc_calculate(CRC_TYPE_8, walk-addcidUsed, profile->detect_ir_dyn_size(walk, context)+3+largecid+addcidUsed); |
| 557 |
walk[largecid+2] = realcrc; |
| 558 |
if(crc != realcrc) { |
| 559 |
rohc_debugf(0,"ROHC Decompress IR_DYN: CRC FAILED! SKA: %i, �: %i\n", realcrc, crc); |
| 560 |
return(0); |
| 561 |
} |
| 562 |
rohc_debugf(2,"ROHC Decompress IR_DYN: CRC OK!\n"); |
| 563 |
|
| 564 |
return(1); |
| 565 |
} |
| 566 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 567 |
// Send Feedback depending on Mode: Unidirectional, Optimistic or Reliable Mode |
| 568 |
// Param state: pointer to decompressor |
| 569 |
// Param rohc_status: type of feedback to send; 0 = OK (ack), -1 = ContextInvalid (S-nack), -2 = PackageFailed (Nack) |
| 570 |
// Param cid: context-id value |
| 571 |
// Param addcidUsed: ==1 if addcid is used |
| 572 |
// Param largecidUsed: ==1 if largecid is used |
| 573 |
// Param mode: mode that ROHC operates in; U-, O- or R-MODE |
| 574 |
// Param ctxt: active/current context |
| 575 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 576 |
void d_operation_mode_feedback(struct sd_rohc * state, int rohc_status, int cid, int addcidUsed, int largecidUsed, int mode, struct sd_context * ctxt) |
| 577 |
{ |
| 578 |
struct sd_feedback sfeedback; |
| 579 |
char * feedback; |
| 580 |
int feedbacksize; |
| 581 |
|
| 582 |
switch(mode) |
| 583 |
{ |
| 584 |
case ROHC_U_MODE: |
| 585 |
// no feedback needed |
| 586 |
//break; |
| 587 |
case ROHC_O_MODE: |
| 588 |
switch(rohc_status) |
| 589 |
{ |
| 590 |
case ROHC_OK: |
| 591 |
f_feedback2(ACKTYPE_ACK, ctxt->mode, ctxt->profile->get_sn(ctxt), &sfeedback); |
| 592 |
feedback = f_wrap_feedback(&sfeedback, cid, largecidUsed, WITH_CRC, &feedbacksize); |
| 593 |
if(!feedback) { |
| 594 |
rohc_debugf(0,"Feedback: ACK FAILED!\n"); |
| 595 |
return; |
| 596 |
} |
| 597 |
ctxt->num_sent_feedbacks++; |
| 598 |
#ifdef USER_SPACE |
| 599 |
rohc_debugf(2,"Feedback send to testapp\n"); |
| 600 |
feedbackRedir_piggy(feedback, feedbacksize); |
| 601 |
#else |
| 602 |
if(state->compressor) |
| 603 |
c_piggyback_feedback(state->compressor, feedback, feedbacksize); |
| 604 |
#endif |
| 605 |
kfree(feedback); |
| 606 |
break; |
| 607 |
case ROHC_ERROR_NO_CONTEXT: |
| 608 |
f_feedback2(ACKTYPE_STATIC_NACK, ROHC_O_MODE, 0, &sfeedback); |
| 609 |
f_add_option(&sfeedback, OPT_TYPE_SN_NOT_VALID, NULL); |
| 610 |
feedback = f_wrap_feedback(&sfeedback, cid, largecidUsed, NO_CRC, &feedbacksize); |
| 611 |
if(!feedback) { |
| 612 |
rohc_debugf(0,"Feedback: ACK FAILED!\n"); |
| 613 |
return; |
| 614 |
} |
| 615 |
//ctxt->num_sent_feedbacks++; |
| 616 |
#ifdef USER_SPACE |
| 617 |
rohc_debugf(2,"Feedback send to testapp\n"); |
| 618 |
feedbackRedir_piggy(feedback, feedbacksize); |
| 619 |
#else |
| 620 |
if(state->compressor) |
| 621 |
c_piggyback_feedback(state->compressor, feedback, feedbacksize); |
| 622 |
#endif |
| 623 |
kfree(feedback); |
| 624 |
break; |
| 625 |
case ROHC_ERROR_PACKAGE_FAILED: |
| 626 |
case ROHC_ERROR_CRC: |
| 627 |
ctxt->num_sent_feedbacks++; |
| 628 |
switch(ctxt->state) |
| 629 |
{ |
| 630 |
case ROHC_NO_CONTEXT: |
| 631 |
rohc_debugf(2,"No context\n"); |
| 632 |
f_feedback2(ACKTYPE_STATIC_NACK, ctxt->mode, ctxt->profile->get_sn(ctxt), &sfeedback); |
| 633 |
feedback = f_wrap_feedback(&sfeedback, cid, largecidUsed, WITH_CRC, &feedbacksize); |
| 634 |
if(!feedback) { |
| 635 |
rohc_debugf(0,"Feedback: S-NACK (PF/CRC) FAILED!\n"); |
| 636 |
return; |
| 637 |
} |
| 638 |
#ifdef USER_SPACE |
| 639 |
rohc_debugf(2,"Feedback send to testapp\n"); |
| 640 |
feedbackRedir_piggy(feedback, feedbacksize); |
| 641 |
#else |
| 642 |
if(state->compressor) |
| 643 |
c_piggyback_feedback(state->compressor, feedback, feedbacksize); |
| 644 |
#endif |
| 645 |
kfree(feedback); |
| 646 |
break; |
| 647 |
case ROHC_STATIC_CONTEXT: |
| 648 |
case ROHC_FULL_CONTEXT: |
| 649 |
|
| 650 |
f_feedback2(ACKTYPE_NACK, ctxt->mode, ctxt->profile->get_sn(ctxt), &sfeedback); |
| 651 |
feedback = f_wrap_feedback(&sfeedback, cid, largecidUsed, WITH_CRC, &feedbacksize); |
| 652 |
if(!feedback) { |
| 653 |
rohc_debugf(0,"Feedback: S-NACK (NC/SC) FAILED!\n"); |
| 654 |
return; |
| 655 |
} |
| 656 |
#ifdef USER_SPACE |
| 657 |
rohc_debugf(2,"Feedback send to testapp\n"); |
| 658 |
feedbackRedir_piggy(feedback, feedbacksize); |
| 659 |
#else |
| 660 |
if(state->compressor) |
| 661 |
c_piggyback_feedback(state->compressor, feedback, feedbacksize); |
| 662 |
#endif |
| 663 |
if(ctxt->state == ROHC_STATIC_CONTEXT) |
| 664 |
ctxt->state = ROHC_NO_CONTEXT; |
| 665 |
if(ctxt->state == ROHC_FULL_CONTEXT) |
| 666 |
ctxt->state = ROHC_STATIC_CONTEXT; |
| 667 |
kfree(feedback); |
| 668 |
break; |
| 669 |
default: |
| 670 |
break; |
| 671 |
} |
| 672 |
break; |
| 673 |
} |
| 674 |
break; |
| 675 |
case ROHC_R_MODE: |
| 676 |
// send feedback (not supported for now) |
| 677 |
break; |
| 678 |
} |
| 679 |
} |
| 680 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 681 |
// Clear all the statistics |
| 682 |
// Param state: pointer to decompressor |
| 683 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 684 |
void clear_statistics(struct sd_rohc * state) |
| 685 |
{ |
| 686 |
state->statistics.packets_received = 0; |
| 687 |
state->statistics.packets_failed_crc = 0; |
| 688 |
state->statistics.packets_failed_no_context = 0; |
| 689 |
state->statistics.packets_failed_package = 0; |
| 690 |
state->statistics.packets_feedback = 0; |
| 691 |
} |
| 692 |
|
| 693 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 694 |
// Store decompression statistics for a decompressor to the buffer |
| 695 |
// Param decomp: pointer to the decompressor |
| 696 |
// Param buffer: |
| 697 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 698 |
/* Store decompression statistics for a decompressor to the buffer */ |
| 699 |
int rohc_d_statistics(struct sd_rohc *decomp, char *buffer) |
| 700 |
{ |
| 701 |
struct s_profile *p; |
| 702 |
int i; |
| 703 |
|
| 704 |
// Decompressor profiles |
| 705 |
for (i=0; i<D_NUM_PROFILES; i++) { |
| 706 |
p = d_profiles[i]; |
| 707 |
|
| 708 |
sprintf(buffer, "%s\n%s\n", buffer, "---Profile"); |
| 709 |
sprintf(buffer, "%sPROFILE NO:%d\n", buffer, p->id); |
| 710 |
sprintf(buffer, "%sACTIVE:%s\n", buffer, "YES"); |
| 711 |
sprintf(buffer, "%sVERSION NO:%s\n", buffer, p->version); |
| 712 |
sprintf(buffer, "%sPROFILE TYPE:%s\n", buffer, p->description); |
| 713 |
|
| 714 |
} |
| 715 |
|
| 716 |
return strlen(buffer); |
| 717 |
} |
| 718 |
|
| 719 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 720 |
// Decompressor Contexts |
| 721 |
// Param decomp: pointer to the decompressor |
| 722 |
// Param index: |
| 723 |
// Param buffer: |
| 724 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 725 |
int rohc_d_context(struct sd_rohc *decomp, int index, char *buffer) { |
| 726 |
char *modes[4]= {"error", "U-mode", "O-mode", "R-mode"}; |
| 727 |
char *states[4] = {"error", "NC", "SC", "FC"}; |
| 728 |
char *save; |
| 729 |
struct sd_context *c; |
| 730 |
int v; |
| 731 |
|
| 732 |
if (index >= decomp->context_array_size) |
| 733 |
return -2; |
| 734 |
|
| 735 |
c = decomp->context[index]; |
| 736 |
if (!c || !c->profile) |
| 737 |
return -1; |
| 738 |
|
| 739 |
save = buffer; |
| 740 |
|
| 741 |
buffer += strlen(buffer); |
| 742 |
sprintf(buffer, "\n---Context\n"); |
| 743 |
buffer += strlen(buffer); |
| 744 |
sprintf(buffer, "CONTEXTTYPE:Decompressor\n"); |
| 745 |
buffer += strlen(buffer); |
| 746 |
sprintf(buffer, "CID:%d\n", index); |
| 747 |
buffer += strlen(buffer); |
| 748 |
sprintf(buffer, "CID_STATE:%s\n", "USED"); |
| 749 |
buffer += strlen(buffer); |
| 750 |
sprintf(buffer, "STATE:%s\n", states[c->state]); |
| 751 |
buffer += strlen(buffer); |
| 752 |
sprintf(buffer, "MODE:%s\n", modes[c->mode]); |
| 753 |
buffer += strlen(buffer); |
| 754 |
sprintf(buffer, "PROFILE:%s\n", c->profile->description); |
| 755 |
buffer += strlen(buffer); |
| 756 |
|
| 757 |
if (c->total_uncompressed_size != 0) |
| 758 |
v = (100*c->total_compressed_size) / c->total_uncompressed_size; |
| 759 |
else |
| 760 |
v = 0; |
| 761 |
if (v < 0) { |
| 762 |
rohc_debugf(0, "decomp: total_compressed_size=%d total_uncompressed_size=%d\n", c->total_compressed_size, c->total_uncompressed_size); |
| 763 |
} |
| 764 |
sprintf(buffer, "TOTALCOMPRATIOALLPACK:%d%%\n", v); |
| 765 |
buffer += strlen(buffer); |
| 766 |
|
| 767 |
if (c->header_uncompressed_size != 0) |
| 768 |
v = (100*c->header_compressed_size) / c->header_uncompressed_size; |
| 769 |
else |
| 770 |
v = 0; |
| 771 |
sprintf(buffer, "TOTALCOMPRATIOALLPACKHEAD:%d%%\n", v); |
| 772 |
buffer += strlen(buffer); |
| 773 |
|
| 774 |
v = c->total_compressed_size/c->num_recv_packets; |
| 775 |
sprintf(buffer, "MEANCOMPPACKSIZEALLPACK:%d\n", v); |
| 776 |
buffer += strlen(buffer); |
| 777 |
|
| 778 |
v = c->header_compressed_size/c->num_recv_packets; |
| 779 |
sprintf(buffer, "MEANHEADSIZEALLCOMPHEAD:%d\n", v); |
| 780 |
buffer += strlen(buffer); |
| 781 |
|
| 782 |
v = c_sum_wlsb(c->total_16_uncompressed); |
| 783 |
if (v != 0) |
| 784 |
v = (100 * c_sum_wlsb(c->total_16_compressed)) / v; |
| 785 |
sprintf(buffer, "COMPRATIOLAST16PACK:%d%%\n", v); |
| 786 |
buffer += strlen(buffer); |
| 787 |
|
| 788 |
v = c_sum_wlsb(c->header_16_uncompressed); |
| 789 |
if (v != 0) |
| 790 |
v = (100 * c_sum_wlsb(c->header_16_compressed)) / v; |
| 791 |
sprintf(buffer, "COMPRATIOLAST16PACKHEAD:%d%%\n", v); |
| 792 |
buffer += strlen(buffer); |
| 793 |
|
| 794 |
v = c_mean_wlsb(c->total_16_compressed); |
| 795 |
sprintf(buffer, "MEANCOMPPACKSIZELAST16PACK:%d\n", v); |
| 796 |
buffer += strlen(buffer); |
| 797 |
|
| 798 |
v = c_mean_wlsb(c->header_16_compressed); |
| 799 |
sprintf(buffer, "MEANHEADSIZELAST16COMPHEAD:%d\n", v); |
| 800 |
buffer += strlen(buffer); |
| 801 |
|
| 802 |
sprintf(buffer, "CONTEXTACTIVATIONTIME:%d\n", (get_milliseconds() - c->first_used) / 1000 ); |
| 803 |
buffer += strlen(buffer); |
| 804 |
sprintf(buffer, "CONTEXTIDLETIME:%d\n", (get_milliseconds() - c->latest_used) / 1000); |
| 805 |
buffer += strlen(buffer); |
| 806 |
|
| 807 |
sprintf(buffer, "NORECVPACKETS:%d\n", c->num_recv_packets); |
| 808 |
buffer += strlen(buffer); |
| 809 |
sprintf(buffer, "NORECVIRPACKETS:%d\n", c->num_recv_ir); |
| 810 |
buffer += strlen(buffer); |
| 811 |
sprintf(buffer, "NORECVIRDYNPACKETS:%d\n", c->num_recv_ir_dyn); |
| 812 |
buffer += strlen(buffer); |
| 813 |
sprintf(buffer, "NOSENTFEEDBACKS:%d\n", c->num_sent_feedbacks); |
| 814 |
buffer += strlen(buffer); |
| 815 |
sprintf(buffer, "NODECOMPFAILURES:%d\n", c->num_decomp_failures); |
| 816 |
buffer += strlen(buffer); |
| 817 |
sprintf(buffer, "NODECOMPREPAIRS:%d\n", c->num_decomp_repairs); |
| 818 |
buffer += strlen(buffer); |
| 819 |
|
| 820 |
return strlen(save); |
| 821 |
} |
| 822 |
|
| 823 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 824 |
// Create an ACK-packet telling the compressor to change state |
| 825 |
// Param state: pointer to decompressor |
| 826 |
// Param ctxt: pointer to active context |
| 827 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 828 |
void d_change_mode_feedback(struct sd_rohc * state, struct sd_context * ctxt) |
| 829 |
{ |
| 830 |
struct sd_feedback sfeedback; |
| 831 |
int cid, feedbacksize; |
| 832 |
char * feedback; |
| 833 |
|
| 834 |
for(cid=0; cid < state->context_array_size; cid++) |
| 835 |
if(ctxt == state->context[cid]) |
| 836 |
break; |
| 837 |
if(cid >= state->context_array_size) |
| 838 |
return; |
| 839 |
|
| 840 |
f_feedback2(ACKTYPE_ACK, ctxt->mode, ctxt->profile->get_sn(ctxt), &sfeedback); |
| 841 |
feedback = f_wrap_feedback(&sfeedback, cid, (state->medium->cid_type == ROHC_LARGE_CID ? 1 : 0), WITH_CRC, &feedbacksize); |
| 842 |
|
| 843 |
if(!feedback) { |
| 844 |
rohc_debugf(0,"Feedback [d_change_mode_feedback()]: ACK FAILED!\n"); |
| 845 |
return; |
| 846 |
} |
| 847 |
#ifdef USER_SPACE |
| 848 |
rohc_debugf(2,"Feedback [ACK] sent to testapp.\n"); |
| 849 |
feedbackRedir_piggy(feedback, feedbacksize); |
| 850 |
#else |
| 851 |
if(state->compressor) |
| 852 |
c_piggyback_feedback(state->compressor, feedback, feedbacksize); |
| 853 |
#endif |
| 854 |
kfree(feedback); |
| 855 |
} |
| 856 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 857 |
// Update feedback interval with data from the gui |
| 858 |
// Param state: pointer to the decompressor |
| 859 |
// Param feedback_maxval: the value from the gui |
| 860 |
//---------------------------------------------------------------------------------------------------------------------------------- |
| 861 |
void usergui_interactions(struct sd_rohc * state, int feedback_maxval) |
| 862 |
{ |
| 863 |
state->maxval = feedback_maxval*100; |
| 864 |
} |
| 865 |
//---------------------------------------------------------------------------------------------------------------------------------- |
