Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 333 insertions, 0 deletions

diff --git a/src/util/dict.h b/src/util/dict.h
new file mode 100644
index 0000000..5cba861
--- /dev/null
+++ b/src/util/dict.h
@@ -0,0 +1,333 @@
+#ifndef _DICT_H_INCLUDED_
+#define _DICT_H_INCLUDED_
+
+/*++
+/* NAME
+/*	dict 3h
+/* SUMMARY
+/*	dictionary manager
+/* SYNOPSIS
+/*	#include <dict.h>
+/* DESCRIPTION
+/* .nf
+
+ /*
+  * System library.
+  */
+#include <fcntl.h>
+#include <setjmp.h>
+
+#ifdef NO_SIGSETJMP
+#define DICT_JMP_BUF jmp_buf
+#else
+#define DICT_JMP_BUF sigjmp_buf
+#endif
+
+ /*
+  * Utility library.
+  */
+#include <vstream.h>
+#include <argv.h>
+#include <vstring.h>
+#include <myflock.h>
+
+ /*
+  * Provenance information.
+  */
+typedef struct DICT_OWNER {
+    int     status;			/* see below */
+    uid_t   uid;			/* use only if status == UNTRUSTED */
+} DICT_OWNER;
+
+ /*
+  * Note that trust levels are not in numerical order.
+  */
+#define DICT_OWNER_UNKNOWN	(-1)	/* ex: unauthenticated tcp, proxy */
+#define DICT_OWNER_TRUSTED	(!1)	/* ex: root-owned config file */
+#define DICT_OWNER_UNTRUSTED	(!0)	/* ex: non-root config file */
+
+ /*
+  * When combining tables with different provenance, we initialize to the
+  * highest trust level, and remember the lowest trust level that we find
+  * during aggregation. If we combine tables that are owned by different
+  * untrusted users, the resulting provenance is "unknown".
+  */
+#define DICT_OWNER_AGGREGATE_INIT(dst) { \
+	(dst).status = DICT_OWNER_TRUSTED; \
+	(dst).uid = 0; \
+    } while (0)
+
+ /*
+  * The following is derived from the 3x3 transition matrix.
+  */
+#define DICT_OWNER_AGGREGATE_UPDATE(dst, src) do { \
+	if ((dst).status == DICT_OWNER_TRUSTED \
+	    || (src).status == DICT_OWNER_UNKNOWN) { \
+	    (dst) = (src); \
+	} else if ((dst).status == (src).status \
+		&& (dst).uid != (src).uid) { \
+	    (dst).status = DICT_OWNER_UNKNOWN; \
+	    (dst).uid = ~0; \
+	} \
+    } while (0)
+
+ /*
+  * Generic dictionary interface - in reality, a dictionary extends this
+  * structure with private members to maintain internal state.
+  */
+typedef struct DICT {
+    char   *type;			/* for diagnostics */
+    char   *name;			/* for diagnostics */
+    int     flags;			/* see below */
+    const char *(*lookup) (struct DICT *, const char *);
+    int     (*update) (struct DICT *, const char *, const char *);
+    int     (*delete) (struct DICT *, const char *);
+    int     (*sequence) (struct DICT *, int, const char **, const char **);
+    int     (*lock) (struct DICT *, int);
+    void    (*close) (struct DICT *);
+    int     lock_type;			/* for read/write lock */
+    int     lock_fd;			/* for read/write lock */
+    int     stat_fd;			/* change detection */
+    time_t  mtime;			/* mod time at open */
+    VSTRING *fold_buf;			/* key folding buffer */
+    DICT_OWNER owner;			/* provenance */
+    int     error;			/* last operation only */
+    DICT_JMP_BUF *jbuf;			/* exception handling */
+    struct DICT_UTF8_BACKUP *utf8_backup;	/* see below */
+    struct VSTRING *file_buf;		/* dict_file_to_buf() */
+    struct VSTRING *file_b64;		/* dict_file_to_b64() */
+} DICT;
+
+extern DICT *dict_alloc(const char *, const char *, ssize_t);
+extern void dict_free(DICT *);
+
+extern DICT *dict_debug(DICT *);
+
+#define DICT_DEBUG(d) ((d)->flags & DICT_FLAG_DEBUG ? dict_debug(d) : (d))
+
+ /*
+  * See dict_open.c embedded manpage for flag definitions.
+  */
+#define DICT_FLAG_NONE		(0)
+#define DICT_FLAG_DUP_WARN	(1<<0)	/* warn about dups if not supported */
+#define DICT_FLAG_DUP_IGNORE	(1<<1)	/* ignore dups if not supported */
+#define DICT_FLAG_TRY0NULL	(1<<2)	/* do not append 0 to key/value */
+#define DICT_FLAG_TRY1NULL	(1<<3)	/* append 0 to key/value */
+#define DICT_FLAG_FIXED		(1<<4)	/* fixed key map */
+#define DICT_FLAG_PATTERN	(1<<5)	/* keys are patterns */
+#define DICT_FLAG_LOCK		(1<<6)	/* use temp lock before access */
+#define DICT_FLAG_DUP_REPLACE	(1<<7)	/* replace dups if supported */
+#define DICT_FLAG_SYNC_UPDATE	(1<<8)	/* sync updates if supported */
+#define DICT_FLAG_DEBUG		(1<<9)	/* log access */
+/*#define DICT_FLAG_FOLD_KEY	(1<<10)	/* lowercase the lookup key */
+#define DICT_FLAG_NO_REGSUB	(1<<11)	/* disallow regexp substitution */
+#define DICT_FLAG_NO_PROXY	(1<<12)	/* disallow proxy mapping */
+#define DICT_FLAG_NO_UNAUTH	(1<<13)	/* disallow unauthenticated data */
+#define DICT_FLAG_FOLD_FIX	(1<<14)	/* case-fold key with fixed-case map */
+#define DICT_FLAG_FOLD_MUL	(1<<15)	/* case-fold key with multi-case map */
+#define DICT_FLAG_FOLD_ANY	(DICT_FLAG_FOLD_FIX | DICT_FLAG_FOLD_MUL)
+#define DICT_FLAG_OPEN_LOCK	(1<<16)	/* perm lock if not multi-writer safe */
+#define DICT_FLAG_BULK_UPDATE	(1<<17)	/* optimize for bulk updates */
+#define DICT_FLAG_MULTI_WRITER	(1<<18)	/* multi-writer safe map */
+#define DICT_FLAG_UTF8_REQUEST	(1<<19)	/* activate UTF-8 if possible */
+#define DICT_FLAG_UTF8_ACTIVE	(1<<20)	/* UTF-8 proxy layer is present */
+#define DICT_FLAG_SRC_RHS_IS_FILE \
+				(1<<21)	/* Map source RHS is a file */
+
+#define DICT_FLAG_UTF8_MASK	(DICT_FLAG_UTF8_REQUEST)
+
+ /* IMPORTANT: Update the dict_mask[] table when the above changes */
+
+ /*
+  * The subsets of flags that control how a map is used. These are relevant
+  * mainly for proxymap support. Note: some categories overlap.
+  * 
+  * DICT_FLAG_IMPL_MASK - flags that are set by the map implementation itself.
+  * 
+  * DICT_FLAG_PARANOID - requestor flags that forbid the use of insecure map
+  * types for security-sensitive operations. These flags are checked by the
+  * map implementation itself upon open, lookup etc. requests.
+  * 
+  * DICT_FLAG_RQST_MASK - all requestor flags, including paranoid flags, that
+  * the requestor may change between open, lookup etc. requests. These
+  * specify requestor properties, not map properties.
+  * 
+  * DICT_FLAG_INST_MASK - none of the above flags. The requestor may not change
+  * these flags between open, lookup, etc. requests (although a map may make
+  * changes to its copy of some of these flags). The proxymap server opens
+  * only one map instance for all client requests with the same values of
+  * these flags, and the proxymap client uses its own saved copy of these
+  * flags. DICT_FLAG_SRC_RHS_IS_FILE is an example of such a flag.
+  */
+#define DICT_FLAG_PARANOID \
+	(DICT_FLAG_NO_REGSUB | DICT_FLAG_NO_PROXY | DICT_FLAG_NO_UNAUTH)
+#define DICT_FLAG_IMPL_MASK	(DICT_FLAG_FIXED | DICT_FLAG_PATTERN | \
+				DICT_FLAG_MULTI_WRITER)
+#define DICT_FLAG_RQST_MASK	(DICT_FLAG_FOLD_ANY | DICT_FLAG_LOCK | \
+				DICT_FLAG_DUP_REPLACE | DICT_FLAG_DUP_WARN | \
+				DICT_FLAG_DUP_IGNORE | DICT_FLAG_SYNC_UPDATE | \
+				DICT_FLAG_PARANOID | DICT_FLAG_UTF8_MASK)
+#define DICT_FLAG_INST_MASK	~(DICT_FLAG_IMPL_MASK | DICT_FLAG_RQST_MASK)
+
+ /*
+  * Feature tests.
+  */
+#define DICT_NEED_UTF8_ACTIVATION(enable, flags) \
+	((enable) && ((flags) & DICT_FLAG_UTF8_MASK))
+
+ /*
+  * dict->error values. Errors must be negative; smtpd_check depends on this.
+  */
+#define DICT_ERR_NONE	0		/* no error */
+#define DICT_ERR_RETRY	(-1)		/* soft error */
+#define DICT_ERR_CONFIG	(-2)		/* configuration error */
+
+ /*
+  * Result values for exposed functions except lookup. FAIL/ERROR are
+  * suggested values, not for use in comparisons for equality.
+  */
+#define DICT_STAT_FAIL		1	/* any value > 0: notfound, conflict */
+#define DICT_STAT_SUCCESS	0	/* request satisfied */
+#define DICT_STAT_ERROR		(-1)	/* any value < 0: database error */
+
+ /*
+  * Set an error code and return a result value.
+  */
+#define DICT_ERR_VAL_RETURN(dict, err, val) do { \
+	(dict)->error = (err); \
+	return (val); \
+    } while (0)
+
+ /*
+  * Sequence function types.
+  */
+#define DICT_SEQ_FUN_FIRST     0	/* set cursor to first record */
+#define DICT_SEQ_FUN_NEXT      1	/* set cursor to next record */
+
+ /*
+  * Interface for dictionary types.
+  */
+extern ARGV *dict_mapnames(void);
+typedef void (*DICT_MAPNAMES_EXTEND_FN) (ARGV *);
+extern DICT_MAPNAMES_EXTEND_FN dict_mapnames_extend(DICT_MAPNAMES_EXTEND_FN);
+
+
+ /*
+  * High-level interface, with logical dictionary names.
+  */
+extern void dict_register(const char *, DICT *);
+extern DICT *dict_handle(const char *);
+extern void dict_unregister(const char *);
+extern int dict_update(const char *, const char *, const char *);
+extern const char *dict_lookup(const char *, const char *);
+extern int dict_delete(const char *, const char *);
+extern int dict_sequence(const char *, const int, const char **, const char **);
+extern int dict_load_file_xt(const char *, const char *);
+extern void dict_load_fp(const char *, VSTREAM *);
+extern const char *dict_eval(const char *, const char *, int);
+extern int dict_error(const char *);
+
+ /*
+  * Low-level interface, with physical dictionary handles.
+  */
+typedef DICT *(*DICT_OPEN_FN) (const char *, int, int);
+typedef DICT_OPEN_FN (*DICT_OPEN_EXTEND_FN) (const char *);
+extern DICT *dict_open(const char *, int, int);
+extern DICT *dict_open3(const char *, const char *, int, int);
+extern void dict_open_register(const char *, DICT_OPEN_FN);
+extern DICT_OPEN_EXTEND_FN dict_open_extend(DICT_OPEN_EXTEND_FN);
+
+#define dict_get(dp, key)	((const char *) (dp)->lookup((dp), (key)))
+#define dict_put(dp, key, val)	(dp)->update((dp), (key), (val))
+#define dict_del(dp, key)	(dp)->delete((dp), (key))
+#define dict_seq(dp, f, key, val) (dp)->sequence((dp), (f), (key), (val))
+#define dict_close(dp)		(dp)->close(dp)
+typedef void (*DICT_WALK_ACTION) (const char *, DICT *, void *);
+extern void dict_walk(DICT_WALK_ACTION, void *);
+extern int dict_changed(void);
+extern const char *dict_changed_name(void);
+extern const char *dict_flags_str(int);
+extern int dict_flags_mask(const char *);
+extern void dict_type_override(DICT *, const char *);
+
+ /*
+  * Check and convert UTF-8 keys and values.
+  */
+typedef struct DICT_UTF8_BACKUP {
+    const char *(*lookup) (struct DICT *, const char *);
+    int     (*update) (struct DICT *, const char *, const char *);
+    int     (*delete) (struct DICT *, const char *);
+}       DICT_UTF8_BACKUP;
+
+extern DICT *dict_utf8_activate(DICT *);
+
+ /*
+  * Driver for interactive or scripted tests.
+  */
+void    dict_test(int, char **);
+
+ /*
+  * Behind-the-scenes support to continue execution with reduced
+  * functionality.
+  */
+extern int dict_allow_surrogate;
+extern DICT *PRINTFLIKE(5, 6) dict_surrogate(const char *, const char *, int, int, const char *,...);
+
+ /*
+  * This name is reserved for matchlist error handling.
+  */
+#define DICT_TYPE_NOFILE	"non-existent"
+#define DICT_TYPE_NOUTF8	"non-UTF-8"
+
+ /*
+  * Duplicated from vstream(3). This should probably be abstracted out.
+  * 
+  * Exception handling. We use pointer to jmp_buf to avoid a lot of unused
+  * baggage for streams that don't need this functionality.
+  * 
+  * XXX sigsetjmp()/siglongjmp() save and restore the signal mask which can
+  * avoid surprises in code that manipulates signals, but unfortunately some
+  * systems have bugs in their implementation.
+  */
+#ifdef NO_SIGSETJMP
+#define dict_setjmp(dict)	setjmp((dict)->jbuf[0])
+#define dict_longjmp(dict, val)	longjmp((dict)->jbuf[0], (val))
+#else
+#define dict_setjmp(dict)	sigsetjmp((dict)->jbuf[0], 1)
+#define dict_longjmp(dict, val)	siglongjmp((dict)->jbuf[0], (val))
+#endif
+#define dict_isjmp(dict)	((dict)->jbuf != 0)
+
+ /*
+  * Temporary API. If exception handling proves to be useful,
+  * dict_jmp_alloc() should be integrated into dict_alloc().
+  */
+extern void dict_jmp_alloc(DICT *);
+
+ /*
+  * dict_file(3).
+  */
+extern struct VSTRING *dict_file_to_buf(DICT *, const char *);
+extern struct VSTRING *dict_file_to_b64(DICT *, const char *);
+extern struct VSTRING *dict_file_from_b64(DICT *, const char *);
+extern char *dict_file_get_error(DICT *);
+extern void dict_file_purge_buffers(DICT *);
+extern const char *dict_file_lookup(DICT *dict, const char *);
+
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*
+/*	Wietse Venema
+/*	Google, Inc.
+/*	111 8th Avenue
+/*	New York, NY 10011, USA
+/*--*/
+
+#endif