/* Copyright (c) The Exim Maintainers 2020 - 2022 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Functions for handling string expansion. */
#include "exim.h"
+#ifdef MACRO_PREDEF
+# include "macro_predef.h"
+#endif
+
typedef unsigned esi_flags;
#define ESI_NOFLAGS 0
#define ESI_BRACE_ENDS BIT(0) /* expansion should stop at } */
{ "recipient_verify_failure",vtype_stringptr,&recipient_verify_failure },
{ "recipients", vtype_string_func, (void *) &fn_recipients },
{ "recipients_count", vtype_int, &recipients_count },
+ { "regex_cachesize", vtype_int, ®ex_cachesize },/* undocumented; devel observability */
#ifdef WITH_CONTENT_SCAN
{ "regex_match_string", vtype_stringptr, ®ex_match_string },
#endif
};
static int var_table_size = nelem(var_table);
+
+#ifdef MACRO_PREDEF
+
+/* dummies */
+uschar * fn_arc_domains(void) {return NULL;}
+uschar * fn_hdrs_added(void) {return NULL;}
+uschar * fn_queue_size(void) {return NULL;}
+uschar * fn_recipients(void) {return NULL;}
+uschar * sender_helo_verified_boolstr(void) {return NULL;}
+uschar * smtp_cmd_hist(void) {return NULL;}
+
+
+
+static void
+expansion_items(void)
+{
+uschar buf[64];
+for (int i = 0; i < nelem(item_table); i++)
+ {
+ spf(buf, sizeof(buf), CUS"_EXP_ITEM_%T", item_table[i]);
+ builtin_macro_create(buf);
+ }
+}
+static void
+expansion_operators(void)
+{
+uschar buf[64];
+for (int i = 0; i < nelem(op_table_underscore); i++)
+ {
+ spf(buf, sizeof(buf), CUS"_EXP_OP_%T", op_table_underscore[i]);
+ builtin_macro_create(buf);
+ }
+for (int i = 0; i < nelem(op_table_main); i++)
+ {
+ spf(buf, sizeof(buf), CUS"_EXP_OP_%T", op_table_main[i]);
+ builtin_macro_create(buf);
+ }
+}
+static void
+expansion_conditions(void)
+{
+uschar buf[64];
+for (int i = 0; i < nelem(cond_table); i++)
+ {
+ spf(buf, sizeof(buf), CUS"_EXP_COND_%T", cond_table[i]);
+ builtin_macro_create(buf);
+ }
+}
+static void
+expansion_variables(void)
+{
+uschar buf[64];
+for (int i = 0; i < nelem(var_table); i++)
+ {
+ spf(buf, sizeof(buf), CUS"_EXP_VAR_%T", var_table[i].name);
+ builtin_macro_create(buf);
+ }
+}
+
+void
+expansions(void)
+{
+expansion_items();
+expansion_operators();
+expansion_conditions();
+expansion_variables();
+}
+
+#else /*!MACRO_PREDEF*/
+
static uschar var_buffer[256];
static BOOL malformed_header;
return node ? node->data.ptr : strict_acl_vars ? NULL : US"";
}
-/* Handle $auth<n> variables. */
+/* Handle $auth<n>, $regex<n> variables. */
if (Ustrncmp(name, "auth", 4) == 0)
{
if (!*endptr && n != 0 && n <= AUTH_VARS)
return auth_vars[n-1] ? auth_vars[n-1] : US"";
}
+#ifdef WITH_CONTENT_SCAN
else if (Ustrncmp(name, "regex", 5) == 0)
{
uschar *endptr;
if (!*endptr && n != 0 && n <= REGEX_VARS)
return regex_vars[n-1] ? regex_vars[n-1] : US"";
}
+#endif
/* For all other variables, search the table */
if (item_type == EITEM_FILTER)
{
BOOL condresult;
+ /* the condition could modify $value, as a side-effect */
+ uschar * save_value = lookup_value;
+
if (!eval_condition(expr, &resetok, &condresult))
{
iterate_item = save_iterate_item;
expand_string_message, name);
goto EXPAND_FAILED;
}
+ lookup_value = save_value;
DEBUG(D_expand) debug_printf_indent("%s: condition is %s\n", name,
condresult? "true":"false");
if (condresult)
continue; /* FALSE => skip this item */
}
- /* EITEM_MAP and EITEM_REDUCE */
-
- else
+ else /* EITEM_MAP and EITEM_REDUCE */
{
+ /* the expansion could modify $value, as a side-effect */
uschar * t = expand_string_internal(expr,
ESI_BRACE_ENDS | ESI_HONOR_DOLLAR | flags, NULL, &resetok, NULL);
- temp = t;
- if (!temp)
+ if (!(temp = t))
{
iterate_item = save_iterate_item;
expand_string_message = string_sprintf("%s inside \"%s\" item",
case 3: goto EXPAND_FAILED;
}
- g = string_catn(g, US"SRS0=", 5);
-
- /* ${l_4:${hmac{md5}{SRS_SECRET}{${lc:$return_path}}}}= */
- hmac_md5(sub[0], string_copylc(sub[1]), cksum, sizeof(cksum));
- g = string_catn(g, cksum, sizeof(cksum));
- g = string_catn(g, US"=", 1);
-
- /* ${base32:${eval:$tod_epoch/86400&0x3ff}}= */
+ if (sub[1] && *(sub[1]))
{
- struct timeval now;
- unsigned long i;
- gstring * h = NULL;
-
- gettimeofday(&now, NULL);
- for (unsigned long i = (now.tv_sec / 86400) & 0x3ff; i; i >>= 5)
- h = string_catn(h, &base32_chars[i & 0x1f], 1);
- if (h) while (h->ptr > 0)
- g = string_catn(g, &h->s[--h->ptr], 1);
- }
- g = string_catn(g, US"=", 1);
+ g = string_catn(g, US"SRS0=", 5);
- /* ${domain:$return_path}=${local_part:$return_path} */
- {
- int start, end, domain;
- uschar * t = parse_extract_address(sub[1], &expand_string_message,
- &start, &end, &domain, FALSE);
- uschar * s;
+ /* ${l_4:${hmac{md5}{SRS_SECRET}{${lc:$return_path}}}}= */
+ hmac_md5(sub[0], string_copylc(sub[1]), cksum, sizeof(cksum));
+ g = string_catn(g, cksum, sizeof(cksum));
+ g = string_catn(g, US"=", 1);
- if (!t)
- goto EXPAND_FAILED;
+ /* ${base32:${eval:$tod_epoch/86400&0x3ff}}= */
+ {
+ struct timeval now;
+ unsigned long i;
+ gstring * h = NULL;
- if (domain > 0) g = string_cat(g, t + domain);
+ gettimeofday(&now, NULL);
+ for (unsigned long i = (now.tv_sec / 86400) & 0x3ff; i; i >>= 5)
+ h = string_catn(h, &base32_chars[i & 0x1f], 1);
+ if (h) while (h->ptr > 0)
+ g = string_catn(g, &h->s[--h->ptr], 1);
+ }
g = string_catn(g, US"=", 1);
- s = domain > 0 ? string_copyn(t, domain - 1) : t;
- if ((quoted = Ustrchr(s, '"') != NULL))
+ /* ${domain:$return_path}=${local_part:$return_path} */
{
- gstring * h = NULL;
- DEBUG(D_expand) debug_printf_indent("auto-quoting local part\n");
- while (*s) /* de-quote */
+ int start, end, domain;
+ uschar * t = parse_extract_address(sub[1], &expand_string_message,
+ &start, &end, &domain, FALSE);
+ uschar * s;
+
+ if (!t)
+ goto EXPAND_FAILED;
+
+ if (domain > 0) g = string_cat(g, t + domain);
+ g = string_catn(g, US"=", 1);
+
+ s = domain > 0 ? string_copyn(t, domain - 1) : t;
+ if ((quoted = Ustrchr(s, '"') != NULL))
{
- while (*s && *s != '"') h = string_catn(h, s++, 1);
- if (*s) s++;
- while (*s && *s != '"') h = string_catn(h, s++, 1);
- if (*s) s++;
+ gstring * h = NULL;
+ DEBUG(D_expand) debug_printf_indent("auto-quoting local part\n");
+ while (*s) /* de-quote */
+ {
+ while (*s && *s != '"') h = string_catn(h, s++, 1);
+ if (*s) s++;
+ while (*s && *s != '"') h = string_catn(h, s++, 1);
+ if (*s) s++;
+ }
+ gstring_release_unused(h);
+ s = string_from_gstring(h);
}
- gstring_release_unused(h);
- s = string_from_gstring(h);
+ g = string_cat(g, s);
}
- g = string_cat(g, s);
- }
- /* Assume that if the original local_part had quotes
- it was for good reason */
+ /* Assume that if the original local_part had quotes
+ it was for good reason */
- if (quoted) yield = string_catn(yield, US"\"", 1);
- yield = string_catn(yield, g->s, g->ptr);
- if (quoted) yield = string_catn(yield, US"\"", 1);
+ if (quoted) yield = string_catn(yield, US"\"", 1);
+ yield = string_catn(yield, g->s, g->ptr);
+ if (quoted) yield = string_catn(yield, US"\"", 1);
- /* @$original_domain */
- yield = string_catn(yield, US"@", 1);
- yield = string_cat(yield, sub[2]);
+ /* @$original_domain */
+ yield = string_catn(yield, US"@", 1);
+ yield = string_cat(yield, sub[2]);
+ }
+ else
+ DEBUG(D_expand) debug_printf_indent("null return_path for srs-encode\n");
break;
}
for (int i = 0; i < AUTH_VARS; i++) if (auth_vars[i])
assert_variable_notin(US"auth<n>", US auth_vars[i], &e);
+#ifdef WITH_CONTENT_SCAN
/* check regex<n> variables. assert_variable_notin() treats as const. */
for (int i = 0; i < REGEX_VARS; i++) if (regex_vars[i])
assert_variable_notin(US"regex<n>", US regex_vars[i], &e);
+#endif
/* check known-name variables */
for (var_entry * v = var_table; v < var_table + var_table_size; v++)
return 0;
}
-#endif
+#endif /*STAND_ALONE*/
+#endif /*!MACRO_PREDEF*/
/* vi: aw ai sw=2
*/
/* End of expand.c */
git://git.exim.org / exim.git / blobdiff