1 cbeb0b26 2006-04-01 devnull /* delimited, authenticated, encrypted connection */
 2 cbeb0b26 2006-04-01 devnull enum{ Maxmsg=4096 };	/* messages > Maxmsg bytes are truncated */
 3 6e527fbc 2005-02-13 devnull typedef struct SConn SConn;
 4 6e527fbc 2005-02-13 devnull 
 5 cbeb0b26 2006-04-01 devnull extern SConn* newSConn(int);	/* arg is open file descriptor */
 6 6e527fbc 2005-02-13 devnull struct SConn{
 7 6e527fbc 2005-02-13 devnull 	void *chan;
 8 6e527fbc 2005-02-13 devnull 	int secretlen;
 9 cbeb0b26 2006-04-01 devnull 	int (*secret)(SConn*, uchar*, int);/*  */
10 cbeb0b26 2006-04-01 devnull 	int (*read)(SConn*, uchar*, int); /* <0 if error;  errmess in buffer */
11 6e527fbc 2005-02-13 devnull 	int (*write)(SConn*, uchar*, int);
12 cbeb0b26 2006-04-01 devnull 	void (*free)(SConn*);		/* also closes file descriptor */
13 6e527fbc 2005-02-13 devnull };
14 cbeb0b26 2006-04-01 devnull /* secret(s,b,dir) sets secret for digest, encrypt, using the secretlen */
15 cbeb0b26 2006-04-01 devnull /*		bytes in b to form keys 	for the two directions; */
16 cbeb0b26 2006-04-01 devnull /*	  set dir=0 in client, dir=1 in server */
17 6e527fbc 2005-02-13 devnull 
18 cbeb0b26 2006-04-01 devnull /* error convention: write !message in-band */
19 6e527fbc 2005-02-13 devnull extern void writerr(SConn*, char*);
20 cbeb0b26 2006-04-01 devnull extern int readstr(SConn*, char*);  /* call with buf of size Maxmsg+1 */
21 cbeb0b26 2006-04-01 devnull 	/* returns -1 upon error, with error message in buf */
22 6e527fbc 2005-02-13 devnull 
23 6e527fbc 2005-02-13 devnull extern void *emalloc(ulong); /* dies on failure; clears memory */
24 6e527fbc 2005-02-13 devnull extern void *erealloc(void *, ulong);
25 6e527fbc 2005-02-13 devnull extern char *estrdup(char *);
26 6e527fbc 2005-02-13 devnull