diff --git a/rtc b/rtc
index bc9fae8..2b95c79 160000
--- a/rtc
+++ b/rtc
@@ -1 +1 @@
-Subproject commit bc9fae8f33f2f382de2cb78c7ac7a89b6517d054
+Subproject commit 2b95c79bd23db8e65c0839678f36402db005cda3
diff --git a/src/handlers/data/mod.rs b/src/handlers/data/mod.rs
index 11ca21f..c3483b1 100644
--- a/src/handlers/data/mod.rs
+++ b/src/handlers/data/mod.rs
@@ -5,7 +5,7 @@ use crate::messages::{
 use data::message::{message_channel_ack::*, message_channel_open::*, message_type::*, *};
 use log::{debug, error};
 use retty::channel::{Handler, InboundContext, InboundHandler, OutboundContext, OutboundHandler};
-use shared::error::{Error, Result};
+use shared::error::Result;
 use shared::marshal::*;
 
 #[derive(Default)]
@@ -66,7 +66,7 @@ impl InboundHandler for DataChannelInbound {
                         } else {
                             Ok((None, None))
                         }
-                    } else if message.data_message_type == DataChannelMessageType::Binary {
+                    } else {
                         Ok((
                             Some(ApplicationMessage {
                                 association_handle: message.association_handle,
@@ -75,8 +75,6 @@ impl InboundHandler for DataChannelInbound {
                             }),
                             None,
                         ))
-                    } else {
-                        Err(Error::UnknownProtocol)
                     }
                 };
 
diff --git a/src/handlers/dtls/mod.rs b/src/handlers/dtls/mod.rs
index f2ac07b..9fd127f 100644
--- a/src/handlers/dtls/mod.rs
+++ b/src/handlers/dtls/mod.rs
@@ -159,6 +159,7 @@ impl OutboundHandler for DtlsOutbound {
                 dtls_endpoint.write(msg.transport.peer_addr, &dtls_message)
             };
             if let Err(err) = try_write() {
+                error!("try_write with error {}", err);
                 ctx.fire_write_exception(Box::new(err));
             }
             handle_outgoing(ctx, &self.dtls_endpoint, msg.transport.local_addr);
diff --git a/src/handlers/sctp/mod.rs b/src/handlers/sctp/mod.rs
index a02e7fc..d3edcf0 100644
--- a/src/handlers/sctp/mod.rs
+++ b/src/handlers/sctp/mod.rs
@@ -56,7 +56,14 @@ impl SctpHandler {
                 sctp_endpoint: Rc::clone(&sctp_endpoint),
 
                 transmits: VecDeque::new(),
-                internal_buffer: vec![0u8; 1500],
+                internal_buffer: vec![
+                    0u8;
+                    server_states
+                        .server_config()
+                        .sctp_server_config
+                        .transport
+                        .max_message_size() as usize
+                ],
             },
             sctp_outbound: SctpOutbound {
                 server_states,
@@ -240,13 +247,14 @@ impl OutboundHandler for SctpOutbound {
                 msg.transport.peer_addr, message
             );
             let mut try_write = || -> Result<()> {
-                let max_payload_size = {
-                    self.sctp_endpoint
-                        .borrow()
-                        .endpoint_config()
-                        .get_max_payload_size() as usize
+                let max_message_size = {
+                    self.server_states
+                        .server_config()
+                        .sctp_server_config
+                        .transport
+                        .max_message_size() as usize as usize
                 };
-                if message.payload.len() > max_payload_size {
+                if message.payload.len() > max_message_size {
                     return Err(Error::ErrOutboundPacketTooLarge);
                 }
 
@@ -288,6 +296,7 @@ impl OutboundHandler for SctpOutbound {
                 Ok(())
             };
             if let Err(err) = try_write() {
+                error!("try_write with error {}", err);
                 ctx.fire_write_exception(Box::new(err));
             }
             handle_outgoing(ctx, &mut self.transmits, msg.transport.local_addr);