51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/* Portions of this file are Copyright (C) 2015-2018 Giacomo Tesio <giacomo@tesio.it>
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* See /doc/license/gpl-2.0.txt for details about the licensing.
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*/
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/* Portions of this file are Copyright (C) 9front's team.
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* See /doc/license/9front-mit for details about the licensing.
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* See http://git.9front.org/plan9front/plan9front/HEAD/info.html for a list of authors.
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*/
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/* delimited, authenticated, encrypted connection */
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enum {
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Maxmsg = 4096, /* messages > Maxmsg bytes are truncated */
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};
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typedef struct SConn SConn;
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struct SConn {
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void *chan;
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int secretlen;
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int (*secret)(SConn*, uint8_t*, int);
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int (*read)(SConn*, uint8_t*, int); /* <0 if error; errmess in buffer */
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int (*write)(SConn*, uint8_t*, int);
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void (*free)(SConn*); /* also closes file descriptor */
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};
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SConn *newSConn(int); /* arg is open file descriptor */
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/*
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* secret(s,b,dir) sets secret for digest, encrypt, using the secretlen
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* bytes in b to form keys for the two directions;
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* set dir=0 in client, dir=1 in server
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*/
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/* error convention: write !message in-band */
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void writerr(SConn*, char*);
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/*
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* returns -1 upon error, with error message in buf
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* call with buf of size Maxmsg+1
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*/
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int readstr(SConn*, char*);
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void *emalloc(uint32_t); /* dies on failure; clears memory */
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void *erealloc(void*, uint32_t);
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char *estrdup(char*);
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