+/*
+ * This file is part of secnet.
+ * See README for full list of copyright holders.
+ *
+ * secnet is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * secnet is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 3 along with secnet; if not, see
+ * https://www.gnu.org/licenses/gpl.html.
+ */
+
#ifndef util_h
#define util_h
* it must NOT be freed. */
extern void buf_append_string(struct buffer_if *buf, cstring_t s);
+ /* Append a two-byte length and the string to the buffer. Length is in
+ * network byte order. */
+
+static inline int hex_encode_size(int binsize) { return binsize*2 + 1; }
+extern void hex_encode(const uint8_t *bin, int binsize, char *buf);
+ /* Convert a byte array to hex into a supplied buffer. */
+extern string_t hex_encode_alloc(const uint8_t *bin, int binsize);
+ /* Returns the result in a freshly allocated string. */
+
+extern bool_t hex_decode(uint8_t *buffer, int32_t buflen, int32_t *outlen,
+ cstring_t hb, bool_t allow_odd_nibble);
+ /* Convert a hex string to binary, storing the result in buffer. If
+ * allow_odd_nibble then it is acceptable if the input is an odd number of
+ * digits, and an additional leading zero digit is assumed; otherwise, this
+ * is not acceptable and the conversion fails.
+ *
+ * The input is processed left to right until it is consumed, the buffer is
+ * full, or an error is encountered in the input. The length of output
+ * produced is stored in *outlen. Returns true if the entire input was
+ * processed without error; otherwise false. */
extern void read_mpbin(MP_INT *a, uint8_t *bin, int binsize);
+ /* Convert a buffer into its MP_INT representation */
extern char *write_mpstring(MP_INT *a);
+ /* Convert a MP_INT into a hex string */
extern int32_t write_mpbin(MP_INT *a, uint8_t *buffer, int32_t buflen);
+ /* Convert a MP_INT into a buffer; return length; truncate if necessary */
extern struct log_if *init_log(list_t *loglist);
extern int consttime_memeq(const void *s1, const void *s2, size_t n);
+void hash_hash(const struct hash_if *hashi, const void *msg, int32_t len,
+ uint8_t *digest /* hi->hlen bytes */);
+
const char *iaddr_to_string(const union iaddr *ia);
int iaddr_socklen(const union iaddr *ia);
const char *desc);
+/*
+ * SBUF_DEFINE(int nbufs, size_t size);
+ * // Generates a number of definitions and statements organising
+ * // nbufs rotating char[size] buffers such that subsequent code
+ * // may refer to:
+ * char *const SBUF;
+ */
+#define SBUF_DEFINE(nbufs, size) \
+ static int static_bufs__bufnum; \
+ static char static_bufs__bufs[(nbufs)][(size)]; \
+ static_bufs__bufnum++; \
+ static_bufs__bufnum %= (nbufs); \
+ static_bufs__bufs[static_bufs__bufnum]
+#define SBUF (static_bufs__bufs[static_bufs__bufnum])
+
/*----- line-buffered asynch input -----*/
enum async_linebuf_result {
async_linebuf_broken,
};
+const char *pollbadbit(int revents); /* returns 0, or bad bit description */
+
enum async_linebuf_result
async_linebuf_read(struct pollfd *pfd, struct buffer_if *buf,
const char **emsg_out);