diff options
Diffstat (limited to 'media/mtransport/third_party/nICEr/src/ice/ice_media_stream.c')
| -rw-r--r-- | media/mtransport/third_party/nICEr/src/ice/ice_media_stream.c | 933 |
1 files changed, 933 insertions, 0 deletions
diff --git a/media/mtransport/third_party/nICEr/src/ice/ice_media_stream.c b/media/mtransport/third_party/nICEr/src/ice/ice_media_stream.c new file mode 100644 index 000000000..b93e45aeb --- /dev/null +++ b/media/mtransport/third_party/nICEr/src/ice/ice_media_stream.c @@ -0,0 +1,933 @@ +/* +Copyright (c) 2007, Adobe Systems, Incorporated +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + +* Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +* Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + +* Neither the name of Adobe Systems, Network Resonance nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + + + +static char *RCSSTRING __UNUSED__="$Id: ice_media_stream.c,v 1.2 2008/04/28 17:59:01 ekr Exp $"; + +#include <string.h> +#include <assert.h> +#include <nr_api.h> +#include <r_assoc.h> +#include <async_timer.h> +#include "ice_util.h" +#include "ice_ctx.h" + +static char *nr_ice_media_stream_states[]={"INVALID", + "UNPAIRED","FROZEN","ACTIVE","COMPLETED","FAILED" +}; + +int nr_ice_media_stream_set_state(nr_ice_media_stream *str, int state); + +int nr_ice_media_stream_create(nr_ice_ctx *ctx,char *label,int components, nr_ice_media_stream **streamp) + { + int r,_status; + nr_ice_media_stream *stream=0; + nr_ice_component *comp=0; + int i; + + if(!(stream=RCALLOC(sizeof(nr_ice_media_stream)))) + ABORT(R_NO_MEMORY); + + if(!(stream->label=r_strdup(label))) + ABORT(R_NO_MEMORY); + + stream->ctx=ctx; + + STAILQ_INIT(&stream->components); + for(i=0;i<components;i++){ + /* component-id must be > 0, so increment by 1 */ + if(r=nr_ice_component_create(stream, i+1, &comp)) + ABORT(r); + + } + + TAILQ_INIT(&stream->check_list); + TAILQ_INIT(&stream->trigger_check_queue); + + stream->component_ct=components; + stream->ice_state = NR_ICE_MEDIA_STREAM_UNPAIRED; + *streamp=stream; + + _status=0; + abort: + if(_status){ + nr_ice_media_stream_destroy(&stream); + } + return(_status); + } + +int nr_ice_media_stream_destroy(nr_ice_media_stream **streamp) + { + nr_ice_media_stream *stream; + nr_ice_component *c1,*c2; + nr_ice_cand_pair *p1,*p2; + if(!streamp || !*streamp) + return(0); + + stream=*streamp; + *streamp=0; + + STAILQ_FOREACH_SAFE(c1, &stream->components, entry, c2){ + STAILQ_REMOVE(&stream->components,c1,nr_ice_component_,entry); + nr_ice_component_destroy(&c1); + } + + /* Note: all the entries from the trigger check queue are held in here as + * well, so we only clean up the super set. */ + TAILQ_FOREACH_SAFE(p1, &stream->check_list, check_queue_entry, p2){ + TAILQ_REMOVE(&stream->check_list,p1,check_queue_entry); + nr_ice_candidate_pair_destroy(&p1); + } + + RFREE(stream->label); + + RFREE(stream->ufrag); + RFREE(stream->pwd); + RFREE(stream->r2l_user); + RFREE(stream->l2r_user); + r_data_zfree(&stream->r2l_pass); + r_data_zfree(&stream->l2r_pass); + + if(stream->timer) + NR_async_timer_cancel(stream->timer); + + RFREE(stream); + + return(0); + } + +int nr_ice_media_stream_initialize(nr_ice_ctx *ctx, nr_ice_media_stream *stream) + { + int r,_status; + nr_ice_component *comp; + + comp=STAILQ_FIRST(&stream->components); + while(comp){ + if(r=nr_ice_component_initialize(ctx,comp)) + ABORT(r); + comp=STAILQ_NEXT(comp,entry); + } + + _status=0; + abort: + return(_status); + } + + +int nr_ice_media_stream_get_attributes(nr_ice_media_stream *stream, char ***attrsp, int *attrctp) + { + int attrct=0; + nr_ice_component *comp; + char **attrs=0; + int index=0; + nr_ice_candidate *cand; + int r,_status; + + *attrctp=0; + + /* First find out how many attributes we need */ + comp=STAILQ_FIRST(&stream->components); + while(comp){ + if (comp->state != NR_ICE_COMPONENT_DISABLED) { + cand = TAILQ_FIRST(&comp->candidates); + while(cand){ + if (!nr_ice_ctx_hide_candidate(stream->ctx, cand)) { + ++attrct; + } + + cand = TAILQ_NEXT(cand, entry_comp); + } + } + comp=STAILQ_NEXT(comp,entry); + } + + if(attrct < 1){ + r_log(LOG_ICE,LOG_ERR,"ICE-STREAM(%s): Failed to find any components for stream",stream->label); + ABORT(R_FAILED); + } + + /* Make the array we'll need */ + if(!(attrs=RCALLOC(sizeof(char *)*attrct))) + ABORT(R_NO_MEMORY); + for(index=0;index<attrct;index++){ + if(!(attrs[index]=RMALLOC(NR_ICE_MAX_ATTRIBUTE_SIZE))) + ABORT(R_NO_MEMORY); + } + + index=0; + /* Now format the attributes */ + comp=STAILQ_FIRST(&stream->components); + while(comp){ + if (comp->state != NR_ICE_COMPONENT_DISABLED) { + nr_ice_candidate *cand; + + cand=TAILQ_FIRST(&comp->candidates); + while(cand){ + if (!nr_ice_ctx_hide_candidate(stream->ctx, cand)) { + assert(index < attrct); + + if (index >= attrct) + ABORT(R_INTERNAL); + + if(r=nr_ice_format_candidate_attribute(cand, attrs[index],NR_ICE_MAX_ATTRIBUTE_SIZE)) + ABORT(r); + + index++; + } + + cand=TAILQ_NEXT(cand,entry_comp); + } + } + comp=STAILQ_NEXT(comp,entry); + } + + *attrsp=attrs; + *attrctp=attrct; + + _status=0; + abort: + if(_status){ + if(attrs){ + for(index=0;index<attrct;index++){ + RFREE(attrs[index]); + } + RFREE(attrs); + } + } + return(_status); + } + +/* Get a default candidate per 4.1.4 */ +int nr_ice_media_stream_get_default_candidate(nr_ice_media_stream *stream, int component, nr_ice_candidate **candp) + { + int r,_status; + nr_ice_component *comp; + + comp=STAILQ_FIRST(&stream->components); + while(comp){ + if (comp->component_id == component) + break; + + comp=STAILQ_NEXT(comp,entry); + } + + if (!comp) + ABORT(R_NOT_FOUND); + + /* If there aren't any IPV4 candidates, try IPV6 */ + if((r=nr_ice_component_get_default_candidate(comp, candp, NR_IPV4)) && + (r=nr_ice_component_get_default_candidate(comp, candp, NR_IPV6))) { + ABORT(r); + } + + _status=0; + abort: + return(_status); + } + + +int nr_ice_media_stream_pair_candidates(nr_ice_peer_ctx *pctx,nr_ice_media_stream *lstream,nr_ice_media_stream *pstream) + { + int r,_status; + nr_ice_component *pcomp,*lcomp; + + pcomp=STAILQ_FIRST(&pstream->components); + lcomp=STAILQ_FIRST(&lstream->components); + while(pcomp){ + if ((lcomp->state != NR_ICE_COMPONENT_DISABLED) && + (pcomp->state != NR_ICE_COMPONENT_DISABLED)) { + if(r=nr_ice_component_pair_candidates(pctx,lcomp,pcomp)) + ABORT(r); + } + + lcomp=STAILQ_NEXT(lcomp,entry); + pcomp=STAILQ_NEXT(pcomp,entry); + }; + + if (pstream->ice_state == NR_ICE_MEDIA_STREAM_UNPAIRED) { + nr_ice_media_stream_set_state(pstream, NR_ICE_MEDIA_STREAM_CHECKS_FROZEN); + } + + _status=0; + abort: + return(_status); + } + +int nr_ice_media_stream_service_pre_answer_requests(nr_ice_peer_ctx *pctx, nr_ice_media_stream *lstream, nr_ice_media_stream *pstream, int *serviced) + { + nr_ice_component *pcomp; + int r,_status; + char *user = 0; + + if (serviced) + *serviced = 0; + + pcomp=STAILQ_FIRST(&pstream->components); + while(pcomp){ + int serviced_inner=0; + + /* Flush all the pre-answer requests */ + if(r=nr_ice_component_service_pre_answer_requests(pctx, pcomp, pstream->r2l_user, &serviced_inner)) + ABORT(r); + if (serviced) + *serviced += serviced_inner; + + pcomp=STAILQ_NEXT(pcomp,entry); + } + + _status=0; + abort: + RFREE(user); + return(_status); + } + +/* S 5.8 -- run the first pair from the triggered check queue (even after + * checks have completed S 8.1.2) or run the highest priority WAITING pair or + * if not available FROZEN pair from the check queue */ +static void nr_ice_media_stream_check_timer_cb(NR_SOCKET s, int h, void *cb_arg) + { + int r,_status; + nr_ice_media_stream *stream=cb_arg; + nr_ice_cand_pair *pair = 0; + int timer_multiplier=stream->pctx->active_streams ? stream->pctx->active_streams : 1; + int timer_val=stream->pctx->ctx->Ta*timer_multiplier; + + assert(timer_val>0); + + r_log(LOG_ICE,LOG_DEBUG,"ICE-PEER(%s): check timer expired for media stream %s",stream->pctx->label,stream->label); + stream->timer=0; + + /* The trigger check queue has the highest priority */ + pair=TAILQ_FIRST(&stream->trigger_check_queue); + while(pair){ + if(pair->state==NR_ICE_PAIR_STATE_WAITING){ + /* Remove the pair from he trigger check queue */ + r_log(LOG_ICE,LOG_DEBUG,"ICE-PEER(%s): Removing pair from trigger check queue %s",stream->pctx->label,pair->as_string); + TAILQ_REMOVE(&stream->trigger_check_queue,pair,triggered_check_queue_entry); + break; + } + pair=TAILQ_NEXT(pair,triggered_check_queue_entry); + } + + if (stream->ice_state != NR_ICE_MEDIA_STREAM_CHECKS_COMPLETED) { + if(!pair){ + /* Find the highest priority WAITING check and move it to RUNNING */ + pair=TAILQ_FIRST(&stream->check_list); + while(pair){ + if(pair->state==NR_ICE_PAIR_STATE_WAITING) + break; + pair=TAILQ_NEXT(pair,check_queue_entry); + } + } + + /* Hmmm... No WAITING. Let's look for FROZEN */ + if(!pair){ + pair=TAILQ_FIRST(&stream->check_list); + + while(pair){ + if(pair->state==NR_ICE_PAIR_STATE_FROZEN){ + if(r=nr_ice_candidate_pair_unfreeze(stream->pctx,pair)) + ABORT(r); + break; + } + pair=TAILQ_NEXT(pair,check_queue_entry); + } + } + } + + if(pair){ + nr_ice_candidate_pair_start(pair->pctx,pair); /* Ignore failures */ + NR_ASYNC_TIMER_SET(timer_val,nr_ice_media_stream_check_timer_cb,cb_arg,&stream->timer); + } + else { + r_log(LOG_ICE,LOG_WARNING,"ICE-PEER(%s): no pairs for %s",stream->pctx->label,stream->label); + } + + _status=0; + abort: + return; + } + +/* Start checks for this media stream (aka check list) */ +int nr_ice_media_stream_start_checks(nr_ice_peer_ctx *pctx, nr_ice_media_stream *stream) + { + int r,_status; + + /* Don't start the check timer if the stream is failed */ + if (stream->ice_state == NR_ICE_MEDIA_STREAM_CHECKS_FAILED) { + assert(0); + ABORT(R_INTERNAL); + } + + /* Even if the stream is completed already remote can still create a new + * triggered check request which needs to fire, but not change our stream + * state. */ + if (stream->ice_state != NR_ICE_MEDIA_STREAM_CHECKS_COMPLETED) { + if(r=nr_ice_media_stream_set_state(stream,NR_ICE_MEDIA_STREAM_CHECKS_ACTIVE)) { + ABORT(r); + } + } + + if (!stream->timer) { + r_log(LOG_ICE,LOG_INFO,"ICE-PEER(%s)/ICE-STREAM(%s): Starting check timer for stream.",pctx->label,stream->label); + nr_ice_media_stream_check_timer_cb(0,0,stream); + } + + nr_ice_peer_ctx_stream_started_checks(pctx, stream); + + _status=0; + abort: + return(_status); + } + +/* Start checks for this media stream (aka check list) S 5.7 */ +int nr_ice_media_stream_unfreeze_pairs(nr_ice_peer_ctx *pctx, nr_ice_media_stream *stream) + { + int r,_status; + r_assoc *assoc=0; + nr_ice_cand_pair *pair=0; + + /* Already seen assoc */ + if(r=r_assoc_create(&assoc,r_assoc_crc32_hash_compute,5)) + ABORT(r); + + /* S 5.7.4. Set the highest priority pairs in each foundation to WAITING */ + pair=TAILQ_FIRST(&stream->check_list); + while(pair){ + void *v; + + if(r=r_assoc_fetch(assoc,pair->foundation,strlen(pair->foundation),&v)){ + if(r!=R_NOT_FOUND) + ABORT(r); + if(r=nr_ice_candidate_pair_unfreeze(pctx,pair)) + ABORT(r); + + if(r=r_assoc_insert(assoc,pair->foundation,strlen(pair->foundation), + 0,0,0,R_ASSOC_NEW)) + ABORT(r); + } + + /* Already exists... fall through */ + pair=TAILQ_NEXT(pair,check_queue_entry); + } + + _status=0; + abort: + r_assoc_destroy(&assoc); + return(_status); + } + +static int nr_ice_media_stream_unfreeze_pairs_match(nr_ice_media_stream *stream, char *foundation) + { + nr_ice_cand_pair *pair; + int r,_status; + int unfroze=0; + + pair=TAILQ_FIRST(&stream->check_list); + while(pair){ + if(pair->state==NR_ICE_PAIR_STATE_FROZEN && + !strcmp(foundation,pair->foundation)){ + if(r=nr_ice_candidate_pair_unfreeze(stream->pctx,pair)) + ABORT(r); + unfroze++; + } + pair=TAILQ_NEXT(pair,check_queue_entry); + } + + if(!unfroze) + return(R_NOT_FOUND); + + _status=0; + abort: + return(_status); + } + +/* S 7.1.2.2 */ +int nr_ice_media_stream_unfreeze_pairs_foundation(nr_ice_media_stream *stream, char *foundation) + { + int r,_status; + nr_ice_media_stream *str; + nr_ice_component *comp; + int invalid_comps=0; + + /* 1. Unfreeze all frozen pairs with the same foundation + in this stream */ + if(r=nr_ice_media_stream_unfreeze_pairs_match(stream,foundation)){ + if(r!=R_NOT_FOUND) + ABORT(r); + } + + /* 2. See if there is a pair in the valid list for every component */ + comp=STAILQ_FIRST(&stream->components); + while(comp){ + if(!comp->valid_pairs) + invalid_comps++; + + comp=STAILQ_NEXT(comp,entry); + } + + /* If there is a pair in the valid list for every component... */ + /* Now go through the check lists for the other streams */ + str=STAILQ_FIRST(&stream->pctx->peer_streams); + while(str){ + if(str!=stream){ + switch(str->ice_state){ + case NR_ICE_MEDIA_STREAM_CHECKS_ACTIVE: + /* Unfreeze matching pairs */ + if(r=nr_ice_media_stream_unfreeze_pairs_match(str,foundation)){ + if(r!=R_NOT_FOUND) + ABORT(r); + } + break; + case NR_ICE_MEDIA_STREAM_CHECKS_FROZEN: + /* Unfreeze matching pairs if any */ + r=nr_ice_media_stream_unfreeze_pairs_match(str,foundation); + if(r){ + if(r!=R_NOT_FOUND) + ABORT(r); + + /* OK, no matching pairs: execute the algorithm from 5.7 + for this stream */ + if(r=nr_ice_media_stream_unfreeze_pairs(str->pctx,str)) + ABORT(r); + } + if(r=nr_ice_media_stream_start_checks(str->pctx,str)) + ABORT(r); + + break; + default: + break; + } + } + + str=STAILQ_NEXT(str,entry); + } + +/* nr_ice_media_stream_dump_state(stream->pctx,stream,stderr); */ + + + _status=0; + abort: + return(_status); + } + + +int nr_ice_media_stream_dump_state(nr_ice_peer_ctx *pctx, nr_ice_media_stream *stream,FILE *out) + { + nr_ice_cand_pair *pair; + + /* r_log(LOG_ICE,LOG_DEBUG,"MEDIA-STREAM(%s): state dump", stream->label); */ + pair=TAILQ_FIRST(&stream->check_list); + while(pair){ + nr_ice_candidate_pair_dump_state(pair,out); + + pair=TAILQ_NEXT(pair,check_queue_entry); + } + + return(0); + } + +int nr_ice_media_stream_set_state(nr_ice_media_stream *str, int state) + { + /* Make no-change a no-op */ + if (state == str->ice_state) + return 0; + + assert(state < sizeof(nr_ice_media_stream_states)/sizeof(char *)); + assert(str->ice_state < sizeof(nr_ice_media_stream_states)/sizeof(char *)); + + r_log(LOG_ICE,LOG_DEBUG,"ICE-PEER(%s): stream %s state %s->%s", + str->pctx->label,str->label, + nr_ice_media_stream_states[str->ice_state], + nr_ice_media_stream_states[state]); + + if(state == NR_ICE_MEDIA_STREAM_CHECKS_ACTIVE) + str->pctx->active_streams++; + if(str->ice_state == NR_ICE_MEDIA_STREAM_CHECKS_ACTIVE) + str->pctx->active_streams--; + + r_log(LOG_ICE,LOG_DEBUG,"ICE-PEER(%s): %d active streams", + str->pctx->label, str->pctx->active_streams); + + str->ice_state=state; + + return(0); + } + +/* S OK, this component has a nominated. If every component has a nominated, + the stream is ready */ +int nr_ice_media_stream_component_nominated(nr_ice_media_stream *stream,nr_ice_component *component) + { + int r,_status; + nr_ice_component *comp; + + comp=STAILQ_FIRST(&stream->components); + while(comp){ + if((comp->state != NR_ICE_COMPONENT_DISABLED) && + (comp->local_component->state != NR_ICE_COMPONENT_DISABLED) && + !comp->nominated) + break; + + comp=STAILQ_NEXT(comp,entry); + } + + /* At least one un-nominated component */ + if(comp) + goto done; + + /* All done... */ + r_log(LOG_ICE,LOG_INFO,"ICE-PEER(%s)/ICE-STREAM(%s): all active components have nominated candidate pairs",stream->pctx->label,stream->label); + nr_ice_media_stream_set_state(stream,NR_ICE_MEDIA_STREAM_CHECKS_COMPLETED); + + /* Cancel our timer */ + if(stream->timer){ + NR_async_timer_cancel(stream->timer); + stream->timer=0; + } + + if (stream->pctx->handler) { + stream->pctx->handler->vtbl->stream_ready(stream->pctx->handler->obj,stream->local_stream); + } + + /* Now tell the peer_ctx that we're connected */ + if(r=nr_ice_peer_ctx_check_if_connected(stream->pctx)) + ABORT(r); + + done: + _status=0; + abort: + return(_status); + } + +int nr_ice_media_stream_component_failed(nr_ice_media_stream *stream,nr_ice_component *component) + { + int r,_status; + nr_ice_cand_pair *p2; + + component->state=NR_ICE_COMPONENT_FAILED; + + /* at least one component failed in this media stream, so the entire + * media stream is marked failed */ + + nr_ice_media_stream_set_state(stream,NR_ICE_MEDIA_STREAM_CHECKS_FAILED); + + /* OK, we need to cancel off everything on this component */ + p2=TAILQ_FIRST(&stream->check_list); + while(p2){ + if(r=nr_ice_candidate_pair_cancel(p2->pctx,p2,0)) + ABORT(r); + + p2=TAILQ_NEXT(p2,check_queue_entry); + } + + /* Cancel our timer */ + if(stream->timer){ + NR_async_timer_cancel(stream->timer); + stream->timer=0; + } + + if (stream->pctx->handler) { + stream->pctx->handler->vtbl->stream_failed(stream->pctx->handler->obj,stream->local_stream); + } + + /* Now tell the peer_ctx that we're connected */ + if(r=nr_ice_peer_ctx_check_if_connected(stream->pctx)) + ABORT(r); + + _status=0; + abort: + return(_status); + } + +int nr_ice_media_stream_get_best_candidate(nr_ice_media_stream *str, int component, nr_ice_candidate **candp) + { + nr_ice_candidate *cand; + nr_ice_candidate *best_cand=0; + nr_ice_component *comp; + int r,_status; + + if(r=nr_ice_media_stream_find_component(str,component,&comp)) + ABORT(r); + + cand=TAILQ_FIRST(&comp->candidates); + while(cand){ + if(cand->state==NR_ICE_CAND_STATE_INITIALIZED){ + if(!best_cand || (cand->priority>best_cand->priority)) + best_cand=cand; + + } + cand=TAILQ_NEXT(cand,entry_comp); + } + + if(!best_cand) + ABORT(R_NOT_FOUND); + + *candp=best_cand; + + _status=0; + abort: + return(_status); + } + + +/* OK, we have the stream the user created, but that reflects the base + ICE ctx, not the peer_ctx. So, find the related stream in the pctx, + and then find the component */ +int nr_ice_media_stream_find_component(nr_ice_media_stream *str, int comp_id, nr_ice_component **compp) + { + int _status; + nr_ice_component *comp; + + comp=STAILQ_FIRST(&str->components); + while(comp){ + if(comp->component_id==comp_id) + break; + + comp=STAILQ_NEXT(comp,entry); + } + if(!comp) + ABORT(R_NOT_FOUND); + + *compp=comp; + + _status=0; + abort: + return(_status); + } + +int nr_ice_media_stream_send(nr_ice_peer_ctx *pctx, nr_ice_media_stream *str, int component, UCHAR *data, int len) + { + int r,_status; + nr_ice_component *comp; + + /* First find the peer component */ + if(r=nr_ice_peer_ctx_find_component(pctx, str, component, &comp)) + ABORT(r); + + /* Do we have an active pair yet? We should... */ + if(!comp->active) + ABORT(R_NOT_FOUND); + + /* Does fresh ICE consent exist? */ + if(!comp->can_send) + ABORT(R_FAILED); + + /* OK, write to that pair, which means: + 1. Use the socket on our local side. + 2. Use the address on the remote side + */ + if(r=nr_socket_sendto(comp->active->local->osock,data,len,0, + &comp->active->remote->addr)) + ABORT(r); + + _status=0; + abort: + return(_status); + } + +/* Returns R_REJECTED if the component is unpaired or has been disabled. */ +int nr_ice_media_stream_get_active(nr_ice_peer_ctx *pctx, nr_ice_media_stream *str, int component, nr_ice_candidate **local, nr_ice_candidate **remote) + { + int r,_status; + nr_ice_component *comp; + + /* First find the peer component */ + if(r=nr_ice_peer_ctx_find_component(pctx, str, component, &comp)) + ABORT(r); + + if (comp->state == NR_ICE_COMPONENT_UNPAIRED || + comp->state == NR_ICE_COMPONENT_DISABLED) + ABORT(R_REJECTED); + + if(!comp->active) + ABORT(R_NOT_FOUND); + + if (local) *local = comp->active->local; + if (remote) *remote = comp->active->remote; + + _status=0; + abort: + return(_status); + } + +int nr_ice_media_stream_addrs(nr_ice_peer_ctx *pctx, nr_ice_media_stream *str, int component, nr_transport_addr *local, nr_transport_addr *remote) + { + int r,_status; + nr_ice_component *comp; + + /* First find the peer component */ + if(r=nr_ice_peer_ctx_find_component(pctx, str, component, &comp)) + ABORT(r); + + /* Do we have an active pair yet? We should... */ + if(!comp->active) + ABORT(R_BAD_ARGS); + + /* Use the socket on our local side */ + if(r=nr_socket_getaddr(comp->active->local->osock,local)) + ABORT(r); + + /* Use the address on the remote side */ + if(r=nr_transport_addr_copy(remote,&comp->active->remote->addr)) + ABORT(r); + + _status=0; + abort: + return(_status); + } + + + +int nr_ice_media_stream_finalize(nr_ice_media_stream *lstr,nr_ice_media_stream *rstr) + { + nr_ice_component *lcomp,*rcomp; + + r_log(LOG_ICE,LOG_DEBUG,"Finalizing media stream %s, peer=%s",lstr->label, + rstr?rstr->label:"NONE"); + + lcomp=STAILQ_FIRST(&lstr->components); + if(rstr) + rcomp=STAILQ_FIRST(&rstr->components); + else + rcomp=0; + + while(lcomp){ + nr_ice_component_finalize(lcomp,rcomp); + + lcomp=STAILQ_NEXT(lcomp,entry); + if(rcomp){ + rcomp=STAILQ_NEXT(rcomp,entry); + } + } + + return(0); + } + +int nr_ice_media_stream_pair_new_trickle_candidate(nr_ice_peer_ctx *pctx, nr_ice_media_stream *pstream, nr_ice_candidate *cand) + { + int r,_status; + nr_ice_component *comp; + + if ((r=nr_ice_media_stream_find_component(pstream, cand->component_id, &comp))) + ABORT(R_NOT_FOUND); + + if (r=nr_ice_component_pair_candidate(pctx, comp, cand, 1)) + ABORT(r); + + _status=0; + abort: + return(_status); + } + +int nr_ice_media_stream_get_consent_status(nr_ice_media_stream *stream, int +component_id, int *can_send, struct timeval *ts) + { + int r,_status; + nr_ice_component *comp; + + if ((r=nr_ice_media_stream_find_component(stream, component_id, &comp))) + ABORT(r); + + *can_send = comp->can_send; + ts->tv_sec = comp->consent_last_seen.tv_sec; + ts->tv_usec = comp->consent_last_seen.tv_usec; + _status=0; + abort: + return(_status); + } + +int nr_ice_media_stream_disable_component(nr_ice_media_stream *stream, int component_id) + { + int r,_status; + nr_ice_component *comp; + + if (stream->ice_state != NR_ICE_MEDIA_STREAM_UNPAIRED) + ABORT(R_FAILED); + + if ((r=nr_ice_media_stream_find_component(stream, component_id, &comp))) + ABORT(r); + + /* Can only disable before pairing */ + if (comp->state != NR_ICE_COMPONENT_UNPAIRED && + comp->state != NR_ICE_COMPONENT_DISABLED) + ABORT(R_FAILED); + + comp->state = NR_ICE_COMPONENT_DISABLED; + + _status=0; + abort: + return(_status); + } + +void nr_ice_media_stream_role_change(nr_ice_media_stream *stream) + { + nr_ice_cand_pair *pair,*temp_pair; + /* Changing role causes candidate pair priority to change, which requires + * re-sorting the check list. */ + nr_ice_cand_pair_head old_checklist; + + assert(stream->ice_state != NR_ICE_MEDIA_STREAM_UNPAIRED); + + /* Move check_list to old_checklist (not POD, have to do the hard way) */ + TAILQ_INIT(&old_checklist); + TAILQ_FOREACH_SAFE(pair,&stream->check_list,check_queue_entry,temp_pair) { + TAILQ_REMOVE(&stream->check_list,pair,check_queue_entry); + TAILQ_INSERT_TAIL(&old_checklist,pair,check_queue_entry); + } + + /* Re-insert into the check list */ + TAILQ_FOREACH_SAFE(pair,&old_checklist,check_queue_entry,temp_pair) { + TAILQ_REMOVE(&old_checklist,pair,check_queue_entry); + nr_ice_candidate_pair_role_change(pair); + nr_ice_candidate_pair_insert(&stream->check_list,pair); + } + } + +int nr_ice_media_stream_find_pair(nr_ice_media_stream *str, nr_ice_candidate *lcand, nr_ice_candidate *rcand, nr_ice_cand_pair **pair) + { + nr_ice_cand_pair_head *head = &str->check_list; + nr_ice_cand_pair *c1; + + c1=TAILQ_FIRST(head); + while(c1){ + if(c1->local == lcand && + c1->remote == rcand) { + *pair=c1; + return(0); + } + + c1=TAILQ_NEXT(c1,check_queue_entry); + } + + return(R_NOT_FOUND); + } |