+/*
+ * 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
extern void *buf_unappend(struct buffer_if *buf, int32_t amount);
extern void *buf_unprepend(struct buffer_if *buf, int32_t amount);
+/* These construct a message in a buffer, truncating if necessary.
+ * _string is only safe for trusted input and *not* UTF-8 (sorry).
+ * _packet_string is safe for any input, including untrusted.
+ * _terminate arranges for the buffer to be null-terminated (and
+ * maybe for a trailing `...' to indicate truncation), and returns
+ * a pointer to the null-terminated string. */
+void truncmsg_add_string(struct buffer_if *buf, cstring_t s);
+void truncmsg_add_packet_string(struct buffer_if*, int32_t, const uint8_t*);
+const char *truncmsg_terminate(const struct buffer_if *buf);
+
+
+struct priomsg {
+ /* U: uninitialised
+ * F: initialised but free (no memory allocated), no leak if discarded
+ * Z: contains no message yet
+ * M: contains some message; you may call truncmsg_add_*
+ */
+ int prio;
+ struct buffer_if m;
+};
+
+void priomsg_new(struct priomsg *pm, int32_t maxlen); /* UF -> Z */
+void priomsg_destroy(struct priomsg *pm, int32_t maxlen); /* FZM -> F */
+void priomsg_reset(struct priomsg *pm); /* FZM -> Z */
+bool_t priomsg_update_p(struct priomsg *pm, int prio); /* ZM -> M */
+ /* returns true iff message of priority prio ought to be added,
+ * caller should then call truncmsg_add_*.
+ * pm may be NULL, in which case it just returns false */
+const char *priomsg_getmessage(const struct priomsg *pm, const char *defmsg);
+ /* return value is null-terminated, valid until next call
+ * or until defmsg is no longer valid ZM */
+
+bool_t priomsg_update_fixed(struct priomsg *pm, int prio, const char *m);
+ /* convenience combination of _update_p and truncmsg_add_string */
+
/*
* void BUF_ADD_BYTES(append, struct buffer_if*, const void*, int32_t size);
* void BUF_ADD_BYTES(prepend, struct buffer_if*, const void*, int32_t size);
* 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);
-
-extern int32_t write_mpbin(MP_INT *a, uint8_t *buffer, int32_t buflen);
+ /* Convert a MP_INT into a hex string */
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);
-#define SBUF (bufs[b]) /* temporary macro */
+/*----- pathprefix_template -----*/
+
+struct pathprefix_template {
+ char *buffer;
+ char *write_here;
+};
+
+void pathprefix_template_init(struct pathprefix_template *out,
+ const char *prefix, int maxsuffix);
+static inline void pathprefix_template_setsuffix
+ (struct pathprefix_template *upd, const char *suffix)
+ { strcpy(upd->write_here,suffix); }
+
+
+/*
+ * 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 -----*/
/*----- some handy macros -----*/
+#define CL_GET_STR_ARG(ix,vn,what) \
+ item_t *vn##_i=list_elem(args,ix); \
+ if (!vn##_i) cfgfatal(loc,"make-public","need " what); \
+ if (vn##_i->type!=t_string) cfgfatal(vn##_i->loc,"make-public", \
+ what "must be string"); \
+ const char *vn=vn##_i->data.string
+
#define MINMAX(ae,be,op) ({ \
typeof((ae)) a=(ae); \
typeof((be)) b=(be); \
~ianmdlvl / secnet.git / blobdiff