static void new_priority(struct sdp_media *media, enum ice_candidate_type type, unsigned int *tprefp,
unsigned int *lprefp)
{
GQueue *cands;
unsigned int lpref, tpref;
u_int32_t prio;
GList *l;
struct sdp_attribute *a;
struct attribute_candidate *c;
lpref = 0;
tpref = ice_type_preference(type);
prio = ice_priority_pref(tpref, lpref, 1);
cands = attr_list_get_by_id(&media->attributes, ATTR_CANDIDATE);
if (!cands)
goto out;
for (l = cands->head; l; l = l->next) {
a = l->data;
c = &a->u.candidate;
if (c->cand_parsed.priority <= prio && c->cand_parsed.type == type
&& c->cand_parsed.component_id == 1)
{
/* tpref should come out as 126 (if host) here, unless the client isn't following
* the RFC, in which case we must adapt */
tpref = ice_type_pref_from_prio(c->cand_parsed.priority);
lpref = ice_local_pref_from_prio(c->cand_parsed.priority);
if (lpref)
lpref--;
else {
/* we must deviate from the RFC recommended values */
if (tpref)
tpref--;
lpref = 65535;
}
prio = ice_priority_pref(tpref, lpref, 1);
}
}
out:
*tprefp = tpref;
*lprefp = lpref;
}
static void insert_candidate(struct sdp_chopper *chop, struct packet_stream *ps, unsigned int component,
unsigned int type_pref, unsigned int local_pref, enum ice_candidate_type type,
struct interface_address *ifa)
{
unsigned long priority;
priority = ice_priority_pref(type_pref, local_pref, component);
chopper_append_c(chop, "a=candidate:");
chopper_append_str(chop, &ifa->ice_foundation);
chopper_append_printf(chop, " %u UDP %lu ", component, priority);
insert_ice_address(chop, ps, ifa);
chopper_append_c(chop, " typ ");
chopper_append_c(chop, ice_candidate_type_str(type));
/* raddr and rport are required for non-host candidates: rfc5245 section-15.1 */
if(type != ICT_HOST)
insert_raddr_rport(chop, ps, ifa);
chopper_append_c(chop, "\r\n");
}
static void insert_candidate(struct sdp_chopper *chop, struct stream_fd *sfd,
unsigned int type_pref, unsigned int local_pref, enum ice_candidate_type type)
{
unsigned long priority;
struct packet_stream *ps = sfd->stream;
const struct local_intf *ifa = sfd->local_intf;
if (local_pref == -1)
local_pref = ifa->unique_id;
priority = ice_priority_pref(type_pref, local_pref, ps->component);
chopper_append_c(chop, "a=candidate:");
chopper_append_str(chop, &ifa->ice_foundation);
chopper_append_printf(chop, " %u UDP %lu ", ps->component, priority);
insert_ice_address(chop, sfd);
chopper_append_c(chop, " typ ");
chopper_append_c(chop, ice_candidate_type_str(type));
/* raddr and rport are required for non-host candidates: rfc5245 section-15.1 */
if(type != ICT_HOST)
insert_raddr_rport(chop, ps, ifa);
chopper_append_c(chop, "\r\n");
}
