make API const-safe
diff --git a/libtelnet.h b/libtelnet.h
index a129438..a8bf4da 100644
--- a/libtelnet.h
+++ b/libtelnet.h
@@ -137,7 +137,7 @@
/* event information */
struct libtelnet_event_t {
/* data buffer: for DATA, SEND, SUBNEGOTIATION, and ERROR events */
- unsigned char *buffer;
+ const unsigned char *buffer;
unsigned int size;
/* type of event */
enum libtelnet_event_type_t type;
@@ -195,7 +195,7 @@
extern void libtelnet_free(libtelnet_t *telnet);
/* push a byte buffer into the state tracker */
-extern void libtelnet_push(libtelnet_t *telnet, unsigned char *buffer,
+extern void libtelnet_push(libtelnet_t *telnet, const unsigned char *buffer,
unsigned int size);
/* send an iac command */
@@ -213,8 +213,8 @@
unsigned char opt);
/* send non-command data (escapes IAC bytes) */
-extern void libtelnet_send_data(libtelnet_t *telnet, unsigned char *buffer,
- unsigned int size);
+extern void libtelnet_send_data(libtelnet_t *telnet,
+ const unsigned char *buffer, unsigned int size);
/* send sub-request, equivalent to:
* libtelnet_send_telopt(telnet, LIBTELNET_SB, telopt)
@@ -224,7 +224,7 @@
* thare are most easily implemented with a series of send_data calls.
*/
extern void libtelnet_send_subnegotiation(libtelnet_t *telnet,
- unsigned char telopt, unsigned char *buffer, unsigned int size);
+ unsigned char telopt, const unsigned char *buffer, unsigned int size);
/* begin sending compressed data (server only) */
extern void libtelnet_begin_compress2(libtelnet_t *telnet);