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dtls.h
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1 
15 #ifndef _JANUS_DTLS_H
16 #define _JANUS_DTLS_H
17 
18 #include <inttypes.h>
19 #include <glib.h>
20 
21 #include "rtp.h"
22 #include "rtpsrtp.h"
23 #include "sctp.h"
24 #include "refcount.h"
25 #include "dtls-bio.h"
26 
29 const char *janus_get_ssl_version(void);
30 
37 gint janus_dtls_srtp_init(const char *server_pem, const char *server_key, const char *password, guint timeout);
39 void janus_dtls_srtp_cleanup(void);
42 
43 
45 typedef enum janus_dtls_role {
50 
52 typedef enum janus_dtls_state {
58 
60 typedef struct janus_dtls_srtp {
62  void *component;
68  gint64 dtls_started;
72  SSL *ssl;
74  BIO *read_bio;
76  BIO *write_bio;
78  gint srtp_valid;
82  srtp_t srtp_in;
84  srtp_t srtp_out;
86  srtp_policy_t remote_policy;
88  srtp_policy_t local_policy;
90  int ready;
93 #ifdef HAVE_SCTP
94 
95  janus_sctp_association *sctp;
96 #endif
97 
98  volatile gint destroyed;
102 
103 
123 void janus_dtls_srtp_incoming_msg(janus_dtls_srtp *dtls, char *buf, uint16_t len);
130 
135 void janus_dtls_callback(const SSL *ssl, int where, int ret);
136 
141 int janus_dtls_verify_callback(int preverify_ok, X509_STORE_CTX *ctx);
142 
143 #ifdef HAVE_SCTP
144 
149 void janus_dtls_wrap_sctp_data(janus_dtls_srtp *dtls, char *label, char *buf, int len);
150 
156 int janus_dtls_send_sctp_data(janus_dtls_srtp *dtls, char *buf, int len);
157 
163 void janus_dtls_notify_data(janus_dtls_srtp *dtls, char *label, char *buf, int len);
164 #endif
165 
170 gboolean janus_dtls_retry(gpointer stack);
171 
175 const gchar *janus_get_dtls_srtp_state(janus_dtls_state state);
176 
180 const gchar *janus_get_dtls_srtp_role(janus_dtls_role role);
181 
185 const gchar *janus_get_dtls_srtp_profile(int profile);
186 
189 gboolean janus_is_dtls(char *buf);
190 
191 #endif
gchar * janus_dtls_get_local_fingerprint(void)
Method to return a string representation (SHA-256) of the certificate fingerprint.
Definition: dtls.c:121
SCTP processing for data channels (headers)
Definition: dtls.h:54
Reference counter mechanism.
struct janus_dtls_srtp janus_dtls_srtp
Janus DTLS-SRTP handle.
const gchar * janus_get_dtls_srtp_profile(int profile)
Helper method to get a string representation of an SRTP profile.
Definition: dtls.c:58
Definition: dtls.h:56
Definition: dtls.h:53
Definition: dtls.h:46
OpenSSL BIO agent writer.
janus_dtls_state dtls_state
DTLS state of this component: -1=failed, 0=nothing, 1=trying, 2=connected.
Definition: dtls.h:66
SRTP definitions (headers)
void janus_dtls_srtp_cleanup(void)
Method to cleanup DTLS stuff before exiting.
Definition: dtls.c:470
gint janus_dtls_srtp_init(const char *server_pem, const char *server_key, const char *password, guint timeout)
DTLS stuff initialization.
Definition: dtls.c:332
Definition: refcount.h:78
gboolean janus_is_dtls(char *buf)
Helper method to demultiplex DTLS from other protocols.
Definition: dtls.c:102
Definition: dtls.h:55
SSL * ssl
SSL context used for DTLS for this component.
Definition: dtls.h:72
void janus_dtls_srtp_destroy(janus_dtls_srtp *dtls)
Destroy a janus_dtls_srtp instance.
Definition: dtls.c:916
const char * janus_get_ssl_version(void)
Helper method to return info on the crypto library and its version.
Definition: dtls.c:327
int retransmissions
The number of retransmissions that have occurred for this DTLS instance so far.
Definition: dtls.h:92
int janus_dtls_verify_callback(int preverify_ok, X509_STORE_CTX *ctx)
DTLS certificate verification callback (http://www.openssl.org/docs/ssl/SSL_CTX_set_verify.html)
Definition: dtls.c:962
srtp_policy_t local_policy
libsrtp policy for outgoing SRTP packets
Definition: dtls.h:88
void janus_dtls_srtp_send_alert(janus_dtls_srtp *dtls)
Send an alert on a janus_dtls_srtp instance.
Definition: dtls.c:905
gint srtp_valid
Whether SRTP has been correctly set up for this component or not.
Definition: dtls.h:78
srtp_t srtp_out
libsrtp context for outgoing SRTP packets
Definition: dtls.h:84
Definition: dtls.h:48
janus_refcount ref
Reference counter for this instance.
Definition: dtls.h:100
Janus DTLS-SRTP handle.
Definition: dtls.h:60
void janus_dtls_srtp_incoming_msg(janus_dtls_srtp *dtls, char *buf, uint16_t len)
Handle an incoming DTLS message.
Definition: dtls.c:614
int ready
Whether this DTLS stack is now ready to be used for messages as well (e.g., SCTP encapsulation) ...
Definition: dtls.h:90
gboolean janus_dtls_retry(gpointer stack)
DTLS retransmission timer.
Definition: dtls.c:1007
gint64 dtls_connected
Monotonic time of when the DTLS state has switched to connected.
Definition: dtls.h:70
BIO * write_bio
Write BIO (outgoing DTLS data)
Definition: dtls.h:76
void janus_dtls_srtp_handshake(janus_dtls_srtp *dtls)
Start a DTLS handshake.
Definition: dtls.c:568
Definition: dtls.h:47
gint64 dtls_started
Monotonic time of when the DTLS handhake has started.
Definition: dtls.h:68
const gchar * janus_get_dtls_srtp_state(janus_dtls_state state)
Helper method to get a string representation of a Janus DTLS state.
Definition: dtls.c:28
gint srtp_profile
The SRTP profile currently in use.
Definition: dtls.h:80
volatile gint destroyed
Atomic flag to check if this instance has been destroyed.
Definition: dtls.h:98
RTP processing (headers)
void * component
Opaque pointer to the component this DTLS-SRTP context belongs to.
Definition: dtls.h:62
janus_dtls_role dtls_role
DTLS role of the server for this stream: 1=client, 0=server.
Definition: dtls.h:64
janus_dtls_srtp * janus_dtls_srtp_create(void *component, janus_dtls_role role)
Create a janus_dtls_srtp instance.
Definition: dtls.c:489
janus_dtls_state
DTLS state.
Definition: dtls.h:52
srtp_policy_t remote_policy
libsrtp policy for incoming SRTP packets
Definition: dtls.h:86
void janus_dtls_callback(const SSL *ssl, int where, int ret)
DTLS alert callback (http://www.openssl.org/docs/ssl/SSL_CTX_set_info_callback.html) ...
Definition: dtls.c:932
janus_dtls_role
DTLS roles.
Definition: dtls.h:45
int janus_dtls_srtp_create_sctp(janus_dtls_srtp *dtls)
Create an SCTP association, for data channels.
Definition: dtls.c:587
const gchar * janus_get_dtls_srtp_role(janus_dtls_role role)
Helper method to get a string representation of a DTLS role.
Definition: dtls.c:44
BIO * read_bio
Read BIO (incoming DTLS data)
Definition: dtls.h:74
srtp_t srtp_in
libsrtp context for incoming SRTP packets
Definition: dtls.h:82