/*
* attribute-fields (a=)
* *(%x61 "=" attribute CRLF)
* attribute = (att-field ":" att-value) / att-field
* att-field = token
* att-value = byte-string
*/
static void
sdp_parse_attribute(sdp_attr_t **attr, const char *begin, const char *end,
uint_t *p_error)
{
const char *current;
sdp_attr_t *new_attr;
sdp_attr_t *tmp;
if (*begin++ != COMMP_EQUALS) {
*p_error |= SDP_ATTRIBUTE_ERROR;
return;
}
new_attr = calloc(1, sizeof (sdp_attr_t));
if (new_attr == NULL) {
*p_error |= SDP_MEMORY_ERROR;
return;
}
/* Get Attribute Name */
current = begin;
if (commp_find_token(&begin, ¤t, end, COMMP_COLON,
B_FALSE) != 0) {
goto err_ret;
} else {
COMMP_COPY_STR(new_attr->a_name, begin, current - begin);
if (new_attr->a_name == NULL) {
sdp_free_attribute(new_attr);
*p_error |= SDP_MEMORY_ERROR;
return;
}
}
/* Get Attribute Value */
if (*current == COMMP_COLON) {
++current;
if (current == end)
goto err_ret;
COMMP_COPY_STR(new_attr->a_value, current, end - current);
if (new_attr->a_value == NULL) {
sdp_free_attribute(new_attr);
*p_error |= SDP_MEMORY_ERROR;
return;
}
}
if (*attr == NULL) {
*attr = new_attr;
} else {
tmp = *attr;
while (tmp->a_next != NULL)
tmp = tmp->a_next;
tmp->a_next = new_attr;
}
return;
err_ret:
*p_error |= SDP_ATTRIBUTE_ERROR;
sdp_free_attribute(new_attr);
}
void
sdp_free_media(sdp_media *media)
{
sdp_attribute *attr, *cattr;
xfree(media->name);
if(media->network != NULL)
sdp_free_network(media->network);
xfree(media->transport);
xfree(media->format_list);
if(media->information != NULL)
xfree(media->information);
if(media->bandwidth_modifier != NULL)
sdp_free_bandwidth_modifier(media->bandwidth_modifier);
if(media->encryption != NULL)
sdp_free_encryption(media->encryption);
attr = media->attributes;
while(attr != NULL) {
cattr = attr;
attr = attr->next;
sdp_free_attribute(cattr);
}
xfree(media);
}
/*
* Adds attribute field to session or media section of SDP.
* a=<attribute>
* a=<attribute>:<value>
*/
int
sdp_add_attribute(sdp_attr_t **attr, const char *name, const char *value)
{
sdp_attr_t *tmp;
sdp_attr_t *new_attr;
int ret = 0;
if (attr == NULL || name == NULL)
return (EINVAL);
new_attr = calloc(1, sizeof (sdp_attr_t));
if (new_attr == NULL)
return (ENOMEM);
if ((ret = commp_add_str(&new_attr->a_name, name, strlen(name))) != 0)
goto err_ret;
if (value != NULL) {
if ((ret = commp_add_str(&new_attr->a_value, value,
strlen(value))) != 0) {
goto err_ret;
}
}
tmp = *attr;
if (tmp == NULL) {
*attr = new_attr;
} else {
while (tmp->a_next != NULL)
tmp = tmp->a_next;
tmp->a_next = new_attr;
}
return (ret);
err_ret:
sdp_free_attribute(new_attr);
return (ret);
}
/*
* Given a media structure and the field ('i', 'b', 'c', et al), this API
* deletes the corresponding structure element. It frees the memory and sets
* the pointer to NULL.
*/
int
sdp_delete_all_media_field(sdp_media_t *media, const char field)
{
if (media == NULL)
return (EINVAL);
switch (field) {
case SDP_INFO_FIELD:
free(media->m_info);
media->m_info = NULL;
break;
case SDP_CONNECTION_FIELD:
sdp_free_connection(media->m_conn);
media->m_conn = NULL;
break;
case SDP_BANDWIDTH_FIELD:
sdp_free_bandwidth(media->m_bw);
media->m_bw = NULL;
break;
case SDP_KEY_FIELD:
sdp_free_key(media->m_key);
media->m_key = NULL;
break;
case SDP_ATTRIBUTE_FIELD:
sdp_free_attribute(media->m_attr);
media->m_attr = NULL;
break;
default:
return (EINVAL);
}
return (0);
}
/*
* Given an attribute list and an attribute, this API deletes that attribue
* from the list. It frees the memory corresponding to that attribute.
*/
int
sdp_delete_attribute(sdp_attr_t **l_attr, sdp_attr_t *attr)
{
sdp_attr_t *cur;
sdp_attr_t *prev;
if (l_attr == NULL || *l_attr == NULL || attr == NULL)
return (EINVAL);
cur = *l_attr;
prev = NULL;
while (cur != NULL && cur != attr) {
prev = cur;
cur = cur->a_next;
}
if (cur == NULL)
return (EINVAL);
if (cur == *l_attr)
*l_attr = cur->a_next;
else
prev->a_next = cur->a_next;
cur->a_next = NULL;
sdp_free_attribute(cur);
return (0);
}
void
sdp_free(sdp *session)
{
sdp_media *media, *cmedia;
sdp_attribute *attr, *cattr;
sdp_repeat *repeat, *crepeat;
if(session->username != NULL)
xfree(session->username);
if(session->session_id != NULL)
xfree(session->session_id);
if(session->network != NULL)
sdp_free_network(session->network);
if(session->name != NULL)
xfree(session->name);
if(session->information != NULL)
xfree(session->information);
if(session->uri != NULL)
xfree(session->uri);
if(session->email != NULL)
xfree(session->email);
if(session->phone != NULL)
xfree(session->phone);
if(session->bandwidth_modifier != NULL)
sdp_free_bandwidth_modifier(session->bandwidth_modifier);
if(session->timezones != NULL)
xfree(session->timezones);
if(session->encryption != NULL)
sdp_free_encryption(session->encryption);
repeat = session->repeats;
while(repeat != NULL) {
crepeat = repeat;
repeat = repeat->next;
sdp_free_repeat(crepeat);
}
attr = session->attributes;
while(attr != NULL) {
cattr = attr;
attr = attr->next;
sdp_free_attribute(cattr);
}
media = session->media;
while(media != NULL) {
cmedia = media;
media = media->next;
sdp_free_media(cmedia);
}
if(session->original != NULL)
xfree(session->original);
xfree(session);
}
/*
* Given a session structure and the field ('v', 'o', 's', et al), this API
* deletes the corresponding structure element. It frees the memory and sets the
* pointer to NULL
*/
int
sdp_delete_all_field(sdp_session_t *session, const char field)
{
if (session == NULL)
return (EINVAL);
switch (field) {
case SDP_ORIGIN_FIELD:
sdp_free_origin(session->s_origin);
session->s_origin = NULL;
break;
case SDP_NAME_FIELD:
free(session->s_name);
session->s_name = NULL;
break;
case SDP_INFO_FIELD:
free(session->s_info);
session->s_info = NULL;
break;
case SDP_URI_FIELD:
free(session->s_uri);
session->s_uri = NULL;
break;
case SDP_EMAIL_FIELD:
sdp_free_list(session->s_email);
session->s_email = NULL;
break;
case SDP_PHONE_FIELD:
sdp_free_list(session->s_phone);
session->s_phone = NULL;
break;
case SDP_CONNECTION_FIELD:
sdp_free_connection(session->s_conn);
session->s_conn = NULL;
break;
case SDP_BANDWIDTH_FIELD:
sdp_free_bandwidth(session->s_bw);
session->s_bw = NULL;
break;
case SDP_TIME_FIELD:
sdp_free_time(session->s_time);
session->s_time = NULL;
break;
case SDP_ZONE_FIELD:
sdp_free_zone(session->s_zone);
session->s_zone = NULL;
break;
case SDP_KEY_FIELD:
sdp_free_key(session->s_key);
session->s_key = NULL;
break;
case SDP_ATTRIBUTE_FIELD:
sdp_free_attribute(session->s_attr);
session->s_attr = NULL;
break;
case SDP_MEDIA_FIELD:
sdp_free_media(session->s_media);
session->s_media = NULL;
break;
default:
return (EINVAL);
}
return (0);
}