Avoid allocating packet buffers unnecessarily.

[meshlink] / src / sptps.h

diff --git a/src/sptps.h b/src/sptps.h
index 5037c46f882e4d49927e7355228266c62fe0c27a..c91d3882b428d09ea5c4d4f9154941a83a0727ed 100644 (file)
--- a/src/sptps.h
+++ b/src/sptps.h
@@ -1,6 +1,9 @@
+#ifndef MESHLINK_SPTPS_H
+#define MESHLINK_SPTPS_H
+
 /*
     sptps.h -- Simple Peer-to-Peer Security
-    Copyright (C) 2011 Guus Sliepen <guus@tinc-vpn.org>,
+    Copyright (C) 2014, 2017 Guus Sliepen <guus@meshlink.io>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -17,13 +20,9 @@
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#ifndef __SPTPS_H__
-#define __SPTPS_H__
-
 #include "system.h"
 
-#include "cipher.h"
-#include "digest.h"
+#include "chacha-poly1305/chacha-poly1305.h"
 #include "ecdh.h"
 #include "ecdsa.h"
 
@@ -35,39 +34,50 @@
 #define SPTPS_CLOSE 130       // Application closed the connection
 
 // Key exchange states
-#define SPTPS_KEX 0           // Waiting for the first Key EXchange record
-#define SPTPS_SECONDARY_KEX 1 // Ready to receive a secondary Key EXchange record
-#define SPTPS_SIG 2           // Waiting for a SIGnature record
-#define SPTPS_ACK 3           // Waiting for an ACKnowledgement record
+#define SPTPS_KEX 1           // Waiting for the first Key EXchange record
+#define SPTPS_SECONDARY_KEX 2 // Ready to receive a secondary Key EXchange record
+#define SPTPS_SIG 3           // Waiting for a SIGnature record
+#define SPTPS_ACK 4           // Waiting for an ACKnowledgement record
 
-typedef bool (*send_data_t)(void *handle, uint8_t type, const char *data, size_t len);
-typedef bool (*receive_record_t)(void *handle, uint8_t type, const char *data, uint16_t len);
+typedef bool (*send_data_t)(void *handle, uint8_t type, const void *data, size_t len);
+typedef bool (*receive_record_t)(void *handle, uint8_t type, const void *data, uint16_t len);
 
 typedef struct sptps {
+       // State
        bool initiator;
        bool datagram;
+       bool instate;
+       bool outstate;
+
        int state;
 
+       // Main member variables
        char *inbuf;
        size_t buflen;
-       uint16_t reclen;
 
-       bool instate;
-       cipher_t incipher;
-       digest_t indigest;
+       chacha_poly1305_ctx_t *incipher;
+       uint32_t replaywin;
        uint32_t inseqno;
-       unsigned int replaywin;
-       unsigned int farfuture;
-       char *late;
+       uint32_t received;
+       uint16_t reclen;
 
-       bool outstate;
-       cipher_t outcipher;
-       digest_t outdigest;
+       chacha_poly1305_ctx_t *outcipher;
        uint32_t outseqno;
 
-       ecdsa_t mykey;
-       ecdsa_t hiskey;
-       ecdh_t ecdh;
+       char *late;
+
+       char *decrypted_buffer;
+       size_t decrypted_buffer_len;
+
+       // Callbacks
+       void *handle;
+       send_data_t send_data;
+       receive_record_t receive_record;
+
+       // Variables used for the authentication phase
+       ecdsa_t *mykey;
+       ecdsa_t *hiskey;
+       ecdh_t *ecdh;
 
        char *mykex;
        char *hiskex;
@@ -75,17 +85,16 @@ typedef struct sptps {
        char *label;
        size_t labellen;
 
-       void *handle;
-       send_data_t send_data;
-       receive_record_t receive_record;
 } sptps_t;
 
-extern unsigned int sptps_replaywin;
-extern bool sptps_start(sptps_t *s, void *handle, bool initiator, bool datagram, ecdsa_t mykey, ecdsa_t hiskey, const char *label, size_t labellen, send_data_t send_data, receive_record_t receive_record);
+extern void sptps_log_quiet(sptps_t *s, int s_errno, const char *format, va_list ap);
+extern void sptps_log_stderr(sptps_t *s, int s_errno, const char *format, va_list ap);
+extern void (*sptps_log)(sptps_t *s, int s_errno, const char *format, va_list ap);
+extern bool sptps_start(sptps_t *s, void *handle, bool initiator, bool datagram, ecdsa_t *mykey, ecdsa_t *hiskey, const char *label, size_t labellen, send_data_t send_data, receive_record_t receive_record) __attribute__((__warn_unused_result__));
 extern bool sptps_stop(sptps_t *s);
-extern bool sptps_send_record(sptps_t *s, uint8_t type, const char *data, uint16_t len);
-extern bool sptps_receive_data(sptps_t *s, const char *data, size_t len);
-extern bool sptps_force_kex(sptps_t *s);
-extern bool sptps_verify_datagram(sptps_t *s, const char *data, size_t len);
+extern bool sptps_send_record(sptps_t *s, uint8_t type, const void *data, uint16_t len);
+extern bool sptps_receive_data(sptps_t *s, const void *data, size_t len) __attribute__((__warn_unused_result__));
+extern bool sptps_force_kex(sptps_t *s) __attribute__((__warn_unused_result__));
+extern bool sptps_verify_datagram(sptps_t *s, const void *data, size_t len) __attribute__((__warn_unused_result__));
 
 #endif