Subversion Repositories planix.SVN

/* delimited, authenticated, encrypted connection */
enum {
        Maxmsg  = 4096,         /* messages > Maxmsg bytes are truncated */
};

typedef struct SConn SConn;
struct SConn {
        void    *chan;
        int     secretlen;
        int     (*secret)(SConn*, uchar*, int);
        int     (*read)(SConn*, uchar*, int); /* <0 if error; errmess in buffer */
        int     (*write)(SConn*, uchar*, int);
        void    (*free)(SConn*);        /* also closes file descriptor */
};

SConn *newSConn(int);                   /* arg is open file descriptor */

/*
 * secret(s,b,dir) sets secret for digest, encrypt, using the secretlen
 *              bytes in b to form keys         for the two directions;
 *        set dir=0 in client, dir=1 in server
 */

/* error convention: write !message in-band */
void    writerr(SConn*, char*);

/*
 * returns -1 upon error, with error message in buf
 * call with buf of size Maxmsg+1
 */
int     readstr(SConn*, char*);

void    *emalloc(ulong);                /* dies on failure; clears memory */
void    *erealloc(void*, ulong);
char    *estrdup(char*);