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sdp: Fix up SDPMedia API that accesses indexed fields

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It's forbidden to provide an index higher than the number of elements in
the array, and will cause crashes or other undesired outcomes.

Also the insert() API should take an Option<u32> instead of an i32 that
might also be -1 for appending. It's awful API otherwise.
This commit is contained in:
Sebastian Dröge 2019-02-27 18:14:46 +02:00
parent 37fd226836
commit 30950917a0
1 changed files with 84 additions and 4 deletions
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88
gstreamer-sdp/src/sdp_media.rs
View file

@ -210,6 +210,10 @@ impl SDPMediaRef {
}
pub fn get_attribute(&self, idx: u32) -> Option<&SDPAttribute> {
if idx >= self.attributes_len() {
return None;
}
unsafe {
let ptr = ffi::gst_sdp_media_get_attribute(&self.0, idx);
if ptr.is_null() {
@ -251,6 +255,10 @@ impl SDPMediaRef {
}
pub fn get_bandwidth(&self, idx: u32) -> Option<&SDPBandwidth> {
if idx >= self.bandwidths_len() {
return None;
}
unsafe {
let ptr = ffi::gst_sdp_media_get_bandwidth(&self.0, idx);
if ptr.is_null() {
@ -266,6 +274,10 @@ impl SDPMediaRef {
}
pub fn get_connection(&self, idx: u32) -> Option<&SDPConnection> {
if idx >= self.connections_len() {
return None;
}
unsafe {
let ptr = ffi::gst_sdp_media_get_connection(&self.0, idx);
if ptr.is_null() {
@ -277,6 +289,10 @@ impl SDPMediaRef {
}
pub fn get_format(&self, idx: u32) -> Option<&str> {
if idx >= self.formats_len() {
return None;
}
unsafe {
let ptr = ffi::gst_sdp_media_get_format(&self.0, idx);
if ptr.is_null() {
@ -355,7 +371,14 @@ impl SDPMediaRef {
}
}
pub fn insert_attribute(&mut self, idx: i32, mut attr: SDPAttribute) -> Result<(), ()> {
pub fn insert_attribute(&mut self, idx: Option<u32>, mut attr: SDPAttribute) -> Result<(), ()> {
if let Some(idx) = idx {
if idx >= self.attributes_len() {
return Err(());
}
}
let idx = idx.map(|idx| idx as i32).unwrap_or(-1);
let result = unsafe { ffi::gst_sdp_media_insert_attribute(&mut self.0, idx, &mut attr.0) };
mem::forget(attr);
match result {
@ -364,7 +387,14 @@ impl SDPMediaRef {
}
}
pub fn insert_bandwidth(&mut self, idx: i32, mut bw: SDPBandwidth) -> Result<(), ()> {
pub fn insert_bandwidth(&mut self, idx: Option<u32>, mut bw: SDPBandwidth) -> Result<(), ()> {
if let Some(idx) = idx {
if idx >= self.bandwidths_len() {
return Err(());
}
}
let idx = idx.map(|idx| idx as i32).unwrap_or(-1);
let result = unsafe { ffi::gst_sdp_media_insert_bandwidth(&mut self.0, idx, &mut bw.0) };
mem::forget(bw);
match result {
@ -373,7 +403,18 @@ impl SDPMediaRef {
}
}
pub fn insert_connection(&mut self, idx: i32, mut conn: SDPConnection) -> Result<(), ()> {
pub fn insert_connection(
&mut self,
idx: Option<u32>,
mut conn: SDPConnection,
) -> Result<(), ()> {
if let Some(idx) = idx {
if idx >= self.connections_len() {
return Err(());
}
}
let idx = idx.map(|idx| idx as i32).unwrap_or(-1);
let result = unsafe { ffi::gst_sdp_media_insert_connection(&mut self.0, idx, &mut conn.0) };
mem::forget(conn);
match result {
@ -382,7 +423,14 @@ impl SDPMediaRef {
}
}
pub fn insert_format(&mut self, idx: i32, format: &str) -> Result<(), ()> {
pub fn insert_format(&mut self, idx: Option<u32>, format: &str) -> Result<(), ()> {
if let Some(idx) = idx {
if idx >= self.formats_len() {
return Err(());
}
}
let idx = idx.map(|idx| idx as i32).unwrap_or(-1);
let result =
unsafe { ffi::gst_sdp_media_insert_format(&mut self.0, idx, format.to_glib_none().0) };
match result {
@ -404,6 +452,10 @@ impl SDPMediaRef {
}
pub fn remove_attribute(&mut self, idx: u32) -> Result<(), ()> {
if idx >= self.attributes_len() {
return Err(());
}
let result = unsafe { ffi::gst_sdp_media_remove_attribute(&mut self.0, idx) };
match result {
ffi::GST_SDP_OK => Ok(()),
@ -412,6 +464,10 @@ impl SDPMediaRef {
}
pub fn remove_bandwidth(&mut self, idx: u32) -> Result<(), ()> {
if idx >= self.bandwidths_len() {
return Err(());
}
let result = unsafe { ffi::gst_sdp_media_remove_bandwidth(&mut self.0, idx) };
match result {
ffi::GST_SDP_OK => Ok(()),
@ -420,6 +476,10 @@ impl SDPMediaRef {
}
pub fn remove_connection(&mut self, idx: u32) -> Result<(), ()> {
if idx >= self.connections_len() {
return Err(());
}
let result = unsafe { ffi::gst_sdp_media_remove_connection(&mut self.0, idx) };
match result {
ffi::GST_SDP_OK => Ok(()),
@ -428,6 +488,10 @@ impl SDPMediaRef {
}
pub fn remove_format(&mut self, idx: u32) -> Result<(), ()> {
if idx >= self.formats_len() {
return Err(());
}
let result = unsafe { ffi::gst_sdp_media_remove_format(&mut self.0, idx) };
match result {
ffi::GST_SDP_OK => Ok(()),
@ -436,6 +500,10 @@ impl SDPMediaRef {
}
pub fn replace_attribute(&mut self, idx: u32, mut attr: SDPAttribute) -> Result<(), ()> {
if idx >= self.attributes_len() {
return Err(());
}
let result = unsafe { ffi::gst_sdp_media_replace_attribute(&mut self.0, idx, &mut attr.0) };
mem::forget(attr);
match result {
@ -445,6 +513,10 @@ impl SDPMediaRef {
}
pub fn replace_bandwidth(&mut self, idx: u32, mut bw: SDPBandwidth) -> Result<(), ()> {
if idx >= self.bandwidths_len() {
return Err(());
}
let result = unsafe { ffi::gst_sdp_media_replace_bandwidth(&mut self.0, idx, &mut bw.0) };
mem::forget(bw);
match result {
@ -454,6 +526,10 @@ impl SDPMediaRef {
}
pub fn replace_connection(&mut self, idx: u32, mut conn: SDPConnection) -> Result<(), ()> {
if idx >= self.connections_len() {
return Err(());
}
let result =
unsafe { ffi::gst_sdp_media_replace_connection(&mut self.0, idx, &mut conn.0) };
mem::forget(conn);
@ -464,6 +540,10 @@ impl SDPMediaRef {
}
pub fn replace_format(&mut self, idx: u32, format: &str) -> Result<(), ()> {
if idx >= self.formats_len() {
return Err(());
}
let result =
unsafe { ffi::gst_sdp_media_replace_format(&mut self.0, idx, format.to_glib_none().0) };
match result {