/*
* Adds media field to the session.
* m=<media> <port>[/portcount] <proto> <fmt> ...
*/
int
sdp_add_media(sdp_session_t *session, const char *name, uint_t port,
int portcount, const char *protocol, const char *fmt, sdp_media_t **media)
{
sdp_media_t *tmp;
sdp_media_t *new_media;
int ret = 0;
if (media != NULL)
*media = NULL;
if (session == NULL || name == NULL || protocol == NULL ||
portcount <= 0 || fmt == NULL) {
return (EINVAL);
}
new_media = calloc(1, sizeof (sdp_media_t));
if (new_media == NULL) {
return (ENOMEM);
}
new_media->m_session = session;
new_media->m_port = port;
new_media->m_portcount = portcount;
if ((ret = commp_add_str(&new_media->m_name, name, strlen(name))) != 0)
goto err_ret;
if ((ret = commp_add_str(&new_media->m_proto, protocol,
strlen(protocol))) != 0) {
goto err_ret;
}
if ((ret = sdp_str_to_list(&new_media->m_format, fmt,
strlen(fmt), B_TRUE)) != 0) {
goto err_ret;
}
tmp = session->s_media;
if (tmp == NULL) {
session->s_media = new_media;
} else {
while (tmp->m_next != NULL)
tmp = tmp->m_next;
tmp->m_next = new_media;
}
if (media != NULL)
*media = new_media;
return (0);
err_ret:
sdp_free_media(new_media);
return (ret);
}
/*
* Given a media list and the media, this API deletes that media from the
* list. It frees the memory corresponding to that media.
*/
int
sdp_delete_media(sdp_media_t **l_media, sdp_media_t *media)
{
sdp_media_t *cur;
sdp_media_t *prev;
if (l_media == NULL || *l_media == NULL || media == NULL)
return (EINVAL);
cur = *l_media;
prev = NULL;
while (cur != NULL && cur != media) {
prev = cur;
cur = cur->m_next;
}
if (cur == NULL)
return (EINVAL);
if (cur == *l_media)
*l_media = cur->m_next;
else
prev->m_next = cur->m_next;
cur->m_next = NULL;
sdp_free_media(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);
}
/*
* media-field (m=)
* %x6d "=" media SP port ["/" integer] SP proto 1*(SP fmt) CRLF
*/
static sdp_media_t *
sdp_parse_media(sdp_session_t *session, const char *begin, const char *end,
uint_t *p_error)
{
const char *current;
const char *fake_end;
sdp_media_t *new_media;
sdp_media_t *tmp;
if (*begin++ != COMMP_EQUALS) {
*p_error |= SDP_MEDIA_ERROR;
return (NULL);
}
new_media = calloc(1, sizeof (sdp_media_t));
if (new_media == NULL) {
*p_error |= SDP_MEMORY_ERROR;
return (NULL);
}
new_media->m_session = session;
/* Get media name */
current = begin;
if (commp_find_token(&begin, ¤t, end, COMMP_SP, B_FALSE) != 0) {
goto err_ret;
} else {
COMMP_COPY_STR(new_media->m_name, begin, current - begin);
if (new_media->m_name == NULL) {
sdp_free_media(new_media);
*p_error |= SDP_MEMORY_ERROR;
return (NULL);
}
}
/* Get port */
begin = ++current;
if (commp_find_token(&begin, ¤t, end, COMMP_SP, B_FALSE) != 0)
goto err_ret;
fake_end = current;
current = begin;
if (commp_find_token(&begin, ¤t, fake_end, COMMP_SLASH,
B_FALSE) != 0) {
goto err_ret;
}
if (commp_atoui(begin, current, &new_media->m_port) != 0)
goto err_ret;
/* Get portcount */
if (*current == COMMP_SLASH) {
begin = ++current;
if (commp_find_token(&begin, ¤t, fake_end, COMMP_SP,
B_FALSE) != 0) {
goto err_ret;
}
if (commp_atoi(begin, current, &new_media->m_portcount) != 0)
goto err_ret;
} else {
new_media->m_portcount = 1;
}
/* Get Protocol */
begin = ++current;
if (commp_find_token(&begin, ¤t, end, COMMP_SP, B_FALSE) != 0) {
goto err_ret;
} else {
COMMP_COPY_STR(new_media->m_proto, begin, current - begin);
if (new_media->m_proto == NULL) {
sdp_free_media(new_media);
*p_error |= SDP_MEMORY_ERROR;
return (NULL);
}
}
++current;
/* Get format list */
if (current >= end)
goto err_ret;
while (current < end) {
begin = current;
if (commp_find_token(&begin, ¤t, end, COMMP_SP,
B_FALSE) != 0) {
goto err_ret;
}
if (add_value_to_list(&new_media->m_format, begin,
current - begin, B_TRUE) != 0) {
sdp_free_media(new_media);
*p_error |= SDP_MEMORY_ERROR;
return (NULL);
}
++current;
}
/* check for trailing white space character. */
if (isspace(*(end - 1)))
goto err_ret;
/* Assign new media to the media list */
tmp = session->s_media;
if (tmp == NULL) {
session->s_media = new_media;
} else {
while (tmp->m_next != NULL)
tmp = tmp->m_next;
tmp->m_next = new_media;
}
return (new_media);
err_ret:
*p_error |= SDP_MEDIA_ERROR;
sdp_free_media(new_media);
return (NULL);
}
/*
* 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);
}