Adding upstream version 3.8.5.upstream/3.8.5

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

1 files changed, 575 insertions, 0 deletions

diff --git a/src/global/db_common.c b/src/global/db_common.c
new file mode 100644
index 0000000..15e7a1c
--- /dev/null
+++ b/src/global/db_common.c
@@ -0,0 +1,575 @@
+/*++
+/* NAME
+/*	db_common 3
+/* SUMMARY
+/*	utilities common to network based dictionaries
+/* SYNOPSIS
+/*	#include "db_common.h"
+/*
+/*	int	db_common_parse(dict, ctx, format, query)
+/*	DICT	*dict;
+/*	void	**ctx;
+/*	const char *format;
+/*	int	query;
+/*
+/*	void	db_common_free_context(ctx)
+/*	void	*ctx;
+/*
+/*	int	db_common_expand(ctx, format, value, key, buf, quote_func);
+/*	void	*ctx;
+/*	const char *format;
+/*	const char *value;
+/*	const char *key;
+/*	VSTRING	*buf;
+/*	void	(*quote_func)(DICT *, const char *, VSTRING *);
+/*
+/*	int	db_common_check_domain(domain_list, addr);
+/*	STRING_LIST *domain_list;
+/*	const char *addr;
+/*
+/*	void	db_common_sql_build_query(query,parser);
+/*	VSTRING	*query;
+/*	CFG_PARSER *parser;
+/*
+/* DESCRIPTION
+/*	This module implements utilities common to network based dictionaries.
+/*
+/*	\fIdb_common_parse\fR parses query and result substitution templates.
+/*	It must be called for each template before any calls to
+/*	\fIdb_common_expand\fR. The \fIctx\fR argument must be initialized to
+/*	a reference to a (void *)0 before the first template is parsed, this
+/*	causes memory for the context to be allocated and the new pointer is
+/*	stored in *ctx. When the dictionary is closed, this memory must be
+/*	freed with a final call to \fBdb_common_free_context\fR.
+/*
+/*	Calls for additional templates associated with the same map must use the
+/*	same ctx argument. The context accumulates run-time lookup key and result
+/*	validation information (inapplicable keys or results are skipped) and is
+/*	needed later in each call of \fIdb_common_expand\fR. A non-zero return
+/*	value indicates that data-dependent '%' expansions were found in the input
+/*	template.
+/*
+/*	db_common_alloc() provides a way to use db_common_parse_domain()
+/*	etc. without prior db_common_parse() call.
+/*
+/*	\fIdb_common_expand\fR expands the specifiers in \fIformat\fR.
+/*	When the input data lacks all fields needed for the expansion, zero
+/*	is returned and the query or result should be skipped. Otherwise
+/*	the expansion is appended to the result buffer (after a comma if the
+/*	result buffer is not empty).
+/*
+/*	If not NULL, the \fBquote_func\fR callback performs database-specific
+/*	quoting of each variable before expansion.
+/*	\fBvalue\fR is the lookup key for query expansion and result for result
+/*	expansion. \fBkey\fR is NULL for query expansion and the lookup key for
+/*	result expansion.
+/* .PP
+/*	The following '%' expansions are performed on \fBvalue\fR:
+/* .IP %%
+/*	A literal percent character.
+/* .IP %s
+/*	The entire lookup key \fIaddr\fR.
+/* .IP %u
+/*	If \fBaddr\fR is a fully qualified address, the local part of the
+/*	address.  Otherwise \fIaddr\fR.
+/* .IP %d
+/*	If \fIaddr\fR is a fully qualified address, the domain part of the
+/*	address.  Otherwise the query against the database is suppressed and
+/*	the lookup returns no results.
+/*
+/*	The following '%' expansions are performed on the lookup \fBkey\fR:
+/* .IP %S
+/*	The entire lookup key \fIkey\fR.
+/* .IP %U
+/*	If \fBkey\fR is a fully qualified address, the local part of the
+/*	address.  Otherwise \fIkey\fR.
+/* .IP %D
+/*	If \fIkey\fR is a fully qualified address, the domain part of the
+/*	address.  Otherwise the query against the database is suppressed and
+/*	the lookup returns no results.
+/* .PP
+/*	\fIdb_common_check_domain\fR() checks the domain list so
+/*	that query optimization can be performed. The result is >0
+/*	(match found), 0 (no match), or <0 (dictionary error code).
+/*
+/* .PP
+/*	\fIdb_common_sql_build_query\fR builds the "default"(backwards compatible)
+/*	query from the 'table', 'select_field', 'where_field' and
+/*	'additional_conditions' parameters, checking for errors.
+/*
+/* DIAGNOSTICS
+/*	Fatal errors: invalid substitution format, invalid string_list pattern,
+/*	insufficient parameters.
+/* SEE ALSO
+/*	dict(3) dictionary manager
+/*	string_list(3) string list pattern matching
+/*	match_ops(3) simple string or host pattern matching
+/* 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
+/*
+/*	Liviu Daia
+/*	Institute of Mathematics of the Romanian Academy
+/*	P.O. BOX 1-764
+/*	RO-014700 Bucharest, ROMANIA
+/*
+/*	Jose Luis Tallon
+/*	G4 J.E. - F.I. - U.P.M.
+/*	Campus de Montegancedo, S/N
+/*	E-28660 Madrid, SPAIN
+/*
+/*	Victor Duchovni
+/*	Morgan Stanley
+/*--*/
+
+ /*
+  * System library.
+  */
+#include "sys_defs.h"
+#include <stddef.h>
+#include <string.h>
+
+ /*
+  * Global library.
+  */
+#include "cfg_parser.h"
+
+ /*
+  * Utility library.
+  */
+#include <mymalloc.h>
+#include <vstring.h>
+#include <msg.h>
+#include <dict.h>
+
+ /*
+  * Application specific
+  */
+#include "db_common.h"
+
+#define	DB_COMMON_KEY_DOMAIN	(1 << 0)/* Need lookup key domain */
+#define	DB_COMMON_KEY_USER	(1 << 1)/* Need lookup key localpart */
+#define	DB_COMMON_VALUE_DOMAIN	(1 << 2)/* Need result domain */
+#define	DB_COMMON_VALUE_USER	(1 << 3)/* Need result localpart */
+#define	DB_COMMON_KEY_PARTIAL	(1 << 4)/* Key uses input substrings */
+
+typedef struct {
+    DICT   *dict;
+    STRING_LIST *domain;
+    int     flags;
+    int     nparts;
+} DB_COMMON_CTX;
+
+/* db_common_alloc - allocate db_common context */
+
+void   *db_common_alloc(DICT *dict)
+{
+    DB_COMMON_CTX *ctx;
+
+    ctx = (DB_COMMON_CTX *) mymalloc(sizeof *ctx);
+    ctx->dict = dict;
+    ctx->domain = 0;
+    ctx->flags = 0;
+    ctx->nparts = 0;
+    return ((void *) ctx);
+}
+
+/* db_common_parse - validate query or result template */
+
+int     db_common_parse(DICT *dict, void **ctxPtr, const char *format, int query)
+{
+    DB_COMMON_CTX *ctx = (DB_COMMON_CTX *) *ctxPtr;
+    const char *cp;
+    int     dynamic = 0;
+
+    if (ctx == 0)
+	ctx = (DB_COMMON_CTX *) (*ctxPtr = db_common_alloc(dict));
+
+    for (cp = format; *cp; ++cp)
+	if (*cp == '%')
+	    switch (*++cp) {
+	    case '%':
+		break;
+	    case 'u':
+		ctx->flags |=
+		    query ? DB_COMMON_KEY_USER | DB_COMMON_KEY_PARTIAL
+		    : DB_COMMON_VALUE_USER;
+		dynamic = 1;
+		break;
+	    case 'd':
+		ctx->flags |=
+		    query ? DB_COMMON_KEY_DOMAIN | DB_COMMON_KEY_PARTIAL
+		    : DB_COMMON_VALUE_DOMAIN;
+		dynamic = 1;
+		break;
+	    case 's':
+	    case 'S':
+		dynamic = 1;
+		break;
+	    case 'U':
+		ctx->flags |= DB_COMMON_KEY_PARTIAL | DB_COMMON_KEY_USER;
+		dynamic = 1;
+		break;
+	    case '1':
+	    case '2':
+	    case '3':
+	    case '4':
+	    case '5':
+	    case '6':
+	    case '7':
+	    case '8':
+	    case '9':
+
+		/*
+		 * Find highest %[1-9] index in query template. Input keys
+		 * will be constrained to those with at least this many
+		 * domain components. This makes the db_common_expand() code
+		 * safe from invalid inputs.
+		 */
+		if (ctx->nparts < *cp - '0')
+		    ctx->nparts = *cp - '0';
+		/* FALLTHROUGH */
+	    case 'D':
+		ctx->flags |= DB_COMMON_KEY_PARTIAL | DB_COMMON_KEY_DOMAIN;
+		dynamic = 1;
+		break;
+	    default:
+		msg_fatal("db_common_parse: %s: Invalid %s template: %s",
+		       ctx->dict->name, query ? "query" : "result", format);
+	    }
+    return dynamic;
+}
+
+/* db_common_parse_domain - parse domain matchlist*/
+
+void    db_common_parse_domain(CFG_PARSER *parser, void *ctxPtr)
+{
+    DB_COMMON_CTX *ctx = (DB_COMMON_CTX *) ctxPtr;
+    char   *domainlist;
+    const char *myname = "db_common_parse_domain";
+
+    domainlist = cfg_get_str(parser, "domain", "", 0, 0);
+    if (*domainlist) {
+	ctx->domain = string_list_init(parser->name, MATCH_FLAG_RETURN,
+				       domainlist);
+	if (ctx->domain == 0)
+
+	    /*
+	     * The "domain" optimization skips input keys that may in fact
+	     * have unwanted matches in the database, so failure to create
+	     * the match list is fatal.
+	     */
+	    msg_fatal("%s: %s: domain match list creation using '%s' failed",
+		      myname, parser->name, domainlist);
+    }
+    myfree(domainlist);
+}
+
+/* db_common_dict_partial - Does query use partial lookup keys? */
+
+int     db_common_dict_partial(void *ctxPtr)
+{
+#if 0					/* Breaks recipient_delimiter */
+    DB_COMMON_CTX *ctx = (DB_COMMON_CTX *) ctxPtr;
+
+    return (ctx->domain || ctx->flags & DB_COMMON_KEY_PARTIAL);
+#endif
+    return (0);
+}
+
+/* db_common_free_ctx - free parse context */
+
+void    db_common_free_ctx(void *ctxPtr)
+{
+    DB_COMMON_CTX *ctx = (DB_COMMON_CTX *) ctxPtr;
+
+    if (ctx->domain)
+	string_list_free(ctx->domain);
+    myfree((void *) ctxPtr);
+}
+
+/* db_common_expand - expand query and result templates */
+
+int     db_common_expand(void *ctxArg, const char *format, const char *value,
+			         const char *key, VSTRING *result,
+			         db_quote_callback_t quote_func)
+{
+    const char *myname = "db_common_expand";
+    DB_COMMON_CTX *ctx = (DB_COMMON_CTX *) ctxArg;
+    const char *vdomain = 0;
+    const char *kdomain = 0;
+    const char *domain = 0;
+    int     dflag = key ? DB_COMMON_VALUE_DOMAIN : DB_COMMON_KEY_DOMAIN;
+    char   *vuser = 0;
+    char   *kuser = 0;
+    ARGV   *parts = 0;
+    int     i;
+    const char *cp;
+
+    /* Skip NULL values, silently. */
+    if (value == 0)
+	return (0);
+
+    /* Don't silenty skip empty query string or empty lookup results. */
+    if (*value == 0) {
+	if (key)
+	    msg_warn("table \"%s:%s\": empty lookup result for: \"%s\""
+		     " -- ignored", ctx->dict->type, ctx->dict->name, key);
+	else
+	    msg_warn("table \"%s:%s\": empty query string"
+		     " -- ignored", ctx->dict->type, ctx->dict->name);
+	return (0);
+    }
+    if (key) {
+	/* This is a result template and the input value is the result */
+	if (ctx->flags & (DB_COMMON_VALUE_DOMAIN | DB_COMMON_VALUE_USER))
+	    if ((vdomain = strrchr(value, '@')) != 0)
+		++vdomain;
+
+	if (((!vdomain || !*vdomain) && (ctx->flags & DB_COMMON_VALUE_DOMAIN) != 0)
+	    || (vdomain == value + 1 && (ctx->flags & DB_COMMON_VALUE_USER) != 0))
+	    return (0);
+
+	/* The result format may use the local or domain part of the key */
+	if (ctx->flags & (DB_COMMON_KEY_DOMAIN | DB_COMMON_KEY_USER))
+	    if ((kdomain = strrchr(key, '@')) != 0)
+		++kdomain;
+
+	/*
+	 * The key should already be checked before the query. No harm if the
+	 * query did not get optimized out, so we just issue a warning.
+	 */
+	if (((!kdomain || !*kdomain) && (ctx->flags & DB_COMMON_KEY_DOMAIN) != 0)
+	|| (kdomain == key + 1 && (ctx->flags & DB_COMMON_KEY_USER) != 0)) {
+	    msg_warn("%s: %s: lookup key '%s' skipped after query", myname,
+		     ctx->dict->name, value);
+	    return (0);
+	}
+    } else {
+	/* This is a query template and the input value is the lookup key */
+	if (ctx->flags & (DB_COMMON_KEY_DOMAIN | DB_COMMON_KEY_USER))
+	    if ((vdomain = strrchr(value, '@')) != 0)
+		++vdomain;
+
+	if (((!vdomain || !*vdomain) && (ctx->flags & DB_COMMON_KEY_DOMAIN) != 0)
+	|| (vdomain == value + 1 && (ctx->flags & DB_COMMON_KEY_USER) != 0))
+	    return (0);
+    }
+
+    if (ctx->nparts > 0) {
+	parts = argv_split(key ? kdomain : vdomain, ".");
+
+	/*
+	 * Filter out input keys whose domains lack enough labels to fill-in
+	 * the query template. See below and also db_common_parse() which
+	 * initializes ctx->nparts.
+	 */
+	if (parts->argc < ctx->nparts) {
+	    argv_free(parts);
+	    return (0);
+	}
+
+	/*
+	 * Skip domains with leading, consecutive or trailing '.' separators
+	 * among the required labels.
+	 */
+	for (i = 0; i < ctx->nparts; i++)
+	    if (*parts->argv[parts->argc - i - 1] == 0) {
+		argv_free(parts);
+		return (0);
+	    }
+    }
+    if (VSTRING_LEN(result) > 0)
+	VSTRING_ADDCH(result, ',');
+
+#define QUOTE_VAL(d, q, v, buf) do { \
+	if (q) \
+	    q(d, v, buf); \
+	else \
+	    vstring_strcat(buf, v); \
+    } while (0)
+
+    /*
+     * Replace all instances of %s with the address to look up. Replace %u
+     * with the user portion, and %d with the domain portion. "%%" expands to
+     * "%".  lowercase -> addr, uppercase -> key
+     */
+    for (cp = format; *cp; cp++) {
+	if (*cp == '%') {
+	    switch (*++cp) {
+
+	    case '%':
+		VSTRING_ADDCH(result, '%');
+		break;
+
+	    case 's':
+		QUOTE_VAL(ctx->dict, quote_func, value, result);
+		break;
+
+	    case 'u':
+		if (vdomain) {
+		    if (vuser == 0)
+			vuser = mystrndup(value, vdomain - value - 1);
+		    QUOTE_VAL(ctx->dict, quote_func, vuser, result);
+		} else
+		    QUOTE_VAL(ctx->dict, quote_func, value, result);
+		break;
+
+	    case 'd':
+		if (!(ctx->flags & dflag))
+		    msg_panic("%s: %s: %s: bad query/result template context",
+			      myname, ctx->dict->name, format);
+		if (!vdomain)
+		    msg_panic("%s: %s: %s: expanding domain-less key or value",
+			      myname, ctx->dict->name, format);
+		QUOTE_VAL(ctx->dict, quote_func, vdomain, result);
+		break;
+
+	    case 'S':
+		if (key)
+		    QUOTE_VAL(ctx->dict, quote_func, key, result);
+		else
+		    QUOTE_VAL(ctx->dict, quote_func, value, result);
+		break;
+
+	    case 'U':
+		if (key) {
+		    if (kdomain) {
+			if (kuser == 0)
+			    kuser = mystrndup(key, kdomain - key - 1);
+			QUOTE_VAL(ctx->dict, quote_func, kuser, result);
+		    } else
+			QUOTE_VAL(ctx->dict, quote_func, key, result);
+		} else {
+		    if (vdomain) {
+			if (vuser == 0)
+			    vuser = mystrndup(value, vdomain - value - 1);
+			QUOTE_VAL(ctx->dict, quote_func, vuser, result);
+		    } else
+			QUOTE_VAL(ctx->dict, quote_func, value, result);
+		}
+		break;
+
+	    case 'D':
+		if (!(ctx->flags & DB_COMMON_KEY_DOMAIN))
+		    msg_panic("%s: %s: %s: bad query/result template context",
+			      myname, ctx->dict->name, format);
+		if ((domain = key ? kdomain : vdomain) == 0)
+		    msg_panic("%s: %s: %s: expanding domain-less key or value",
+			      myname, ctx->dict->name, format);
+		QUOTE_VAL(ctx->dict, quote_func, domain, result);
+		break;
+
+	    case '1':
+	    case '2':
+	    case '3':
+	    case '4':
+	    case '5':
+	    case '6':
+	    case '7':
+	    case '8':
+	    case '9':
+
+		/*
+		 * Interpolate %[1-9] components into the query string. By
+		 * this point db_common_parse() has identified the highest
+		 * component index, and (see above) keys with fewer
+		 * components have been filtered out. The "parts" ARGV is
+		 * guaranteed to be initialized and hold enough elements to
+		 * satisfy the query template.
+		 */
+		if (!(ctx->flags & DB_COMMON_KEY_DOMAIN)
+		    || ctx->nparts < *cp - '0')
+		    msg_panic("%s: %s: %s: bad query/result template context",
+			      myname, ctx->dict->name, format);
+		if (!parts || parts->argc < ctx->nparts)
+		    msg_panic("%s: %s: %s: key has too few domain labels",
+			      myname, ctx->dict->name, format);
+		QUOTE_VAL(ctx->dict, quote_func,
+			  parts->argv[parts->argc - (*cp - '0')], result);
+		break;
+
+	    default:
+		msg_fatal("%s: %s: invalid %s template '%s'", myname,
+			  ctx->dict->name, key ? "result" : "query",
+			  format);
+	    }
+	} else
+	    VSTRING_ADDCH(result, *cp);
+    }
+    VSTRING_TERMINATE(result);
+
+    if (vuser)
+	myfree(vuser);
+    if (kuser)
+	myfree(kuser);
+    if (parts)
+	argv_free(parts);
+
+    return (1);
+}
+
+
+/* db_common_check_domain - check domain list */
+
+int     db_common_check_domain(void *ctxPtr, const char *addr)
+{
+    DB_COMMON_CTX *ctx = (DB_COMMON_CTX *) ctxPtr;
+    char   *domain;
+
+    if (ctx->domain) {
+	if ((domain = strrchr(addr, '@')) != NULL)
+	    ++domain;
+	if (domain == NULL || domain == addr + 1)
+	    return (0);
+	if (match_list_match(ctx->domain, domain) == 0)
+	    return (ctx->domain->error);
+    }
+    return (1);
+}
+
+/* db_common_sql_build_query -- build query for SQL maptypes */
+
+void    db_common_sql_build_query(VSTRING *query, CFG_PARSER *parser)
+{
+    const char *myname = "db_common_sql_build_query";
+    char   *table;
+    char   *select_field;
+    char   *where_field;
+    char   *additional_conditions;
+
+    /*
+     * Build "old style" query: "select %s from %s where %s"
+     */
+    if ((table = cfg_get_str(parser, "table", NULL, 1, 0)) == 0)
+	msg_fatal("%s: 'table' parameter not defined", myname);
+
+    if ((select_field = cfg_get_str(parser, "select_field", NULL, 1, 0)) == 0)
+	msg_fatal("%s: 'select_field' parameter not defined", myname);
+
+    if ((where_field = cfg_get_str(parser, "where_field", NULL, 1, 0)) == 0)
+	msg_fatal("%s: 'where_field' parameter not defined", myname);
+
+    additional_conditions = cfg_get_str(parser, "additional_conditions",
+					"", 0, 0);
+
+    vstring_sprintf(query, "SELECT %s FROM %s WHERE %s='%%s' %s",
+		    select_field, table, where_field,
+		    additional_conditions);
+
+    myfree(table);
+    myfree(select_field);
+    myfree(where_field);
+    myfree(additional_conditions);
+}