X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/31f5b3492bde6a055c0c349a3d46718bd5a7e4f0..b7c6d0ccbc57c958954205b2c9d70528b9688c1a:/src/src/functions.h

diff --git a/src/src/functions.h b/src/src/functions.h
index 84eb87397..c03f88304 100644
--- a/src/src/functions.h
+++ b/src/src/functions.h
@@ -3,7 +3,7 @@
 *************************************************/
 
 /* Copyright (c) University of Cambridge 1995 - 2018 */
-/* Copyright (c) The Exim Maintainers 2020 */
+/* Copyright (c) The Exim Maintainers 2020 - 2021 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 
@@ -56,9 +56,9 @@ extern BOOL    tls_client_start(client_conn_ctx *, smtp_connect_args *,
 extern void    tls_client_creds_reload(BOOL);
 
 extern void    tls_close(void *, int);
-extern BOOL    tls_could_read(void);
+extern BOOL    tls_could_getc(void);
 extern void    tls_daemon_init(void);
-extern void    tls_daemon_tick(void);
+extern int     tls_daemon_tick(void);
 extern BOOL    tls_dropprivs_validate_require_cipher(BOOL);
 extern BOOL    tls_export_cert(uschar *, size_t, void *);
 extern int     tls_feof(void);
@@ -67,7 +67,8 @@ extern uschar *tls_field_from_dn(uschar *, const uschar *);
 extern void    tls_free_cert(void **);
 extern int     tls_getc(unsigned);
 extern uschar *tls_getbuf(unsigned *);
-extern void    tls_get_cache(void);
+extern void    tls_get_cache(unsigned);
+extern BOOL    tls_hasc(void);
 extern BOOL    tls_import_cert(const uschar *, void **);
 extern BOOL    tls_is_name_for_cert(const uschar *, void *);
 # ifdef USE_OPENSSL
@@ -84,7 +85,7 @@ extern void    tls_watch_invalidate(void);
 #endif
 extern int     tls_write(void *, const uschar *, size_t, BOOL);
 extern uschar *tls_validate_require_cipher(void);
-extern void    tls_version_report(FILE *);
+extern gstring *tls_version_report(gstring *);
 
 # ifdef SUPPORT_DANE
 extern int     tlsa_lookup(const host_item *, dns_answer *, BOOL);
@@ -150,6 +151,7 @@ extern uschar *b64encode_taint(const uschar *, int, BOOL);
 extern int     b64decode(const uschar *, uschar **);
 extern int     bdat_getc(unsigned);
 extern uschar *bdat_getbuf(unsigned *);
+extern BOOL    bdat_hasc(void);
 extern int     bdat_ungetc(int);
 extern void    bdat_flush_data(void);
 
@@ -184,14 +186,17 @@ extern int     dcc_process(uschar **);
 #endif
 
 extern void    debug_logging_activate(uschar *, uschar *);
-extern void    debug_logging_stop(void);
+extern void    debug_logging_stop(BOOL);
 extern void    debug_print_argv(const uschar **);
 extern void    debug_print_ids(uschar *);
 extern void    debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
 extern void    debug_print_string(uschar *);
 extern void    debug_print_tree(const char *, tree_node *);
 extern void    debug_vprintf(int, const char *, va_list);
+extern void    debug_pretrigger_setup(const uschar *);
+extern void    debug_pretrigger_discard(void);
 extern void    debug_print_socket(int);
+extern void    debug_trigger_fire(void);
 
 extern void    decode_bits(unsigned int *, size_t, int *,
 	           uschar *, bit_table *, int, uschar *, int);
@@ -234,7 +239,7 @@ extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 extern void    enq_end(uschar *);
 extern BOOL    enq_start(uschar *, unsigned);
 #ifndef DISABLE_EVENT
-extern uschar *event_raise(uschar *, const uschar *, uschar *);
+extern uschar *event_raise(uschar *, const uschar *, uschar *, int *);
 extern void    msg_event_raise(const uschar *, const address_item *);
 #endif
 
@@ -243,7 +248,7 @@ extern const uschar * exim_errstr(int);
 extern void    exim_exit(int) NORETURN;
 extern void    exim_gettime(struct timeval *);
 extern void    exim_nullstd(void);
-extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
+extern void    exim_setugid(uid_t, gid_t, BOOL, const uschar *);
 extern void    exim_underbar_exit(int) NORETURN;
 extern void    exim_wait_tick(struct timeval *, int);
 extern int     exp_bool(address_item *addr,
@@ -262,7 +267,7 @@ extern void    modify_variable(uschar *, void *);
 
 extern BOOL    fd_ready(int, time_t);
 
-extern int     filter_interpret(uschar *, int, address_item **, uschar **);
+extern int     filter_interpret(const uschar *, int, address_item **, uschar **);
 extern BOOL    filter_personal(string_item *, BOOL);
 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 extern BOOL    filter_system_interpret(address_item **, uschar **);
@@ -316,7 +321,7 @@ extern int     ip_streamsocket(const uschar *, uschar **, int, host_item *);
 extern int     ipv6_nmtoa(int *, uschar *);
 
 extern uschar *local_part_quote(uschar *);
-extern int     log_open_as_exim(uschar *);
+extern int     log_open_as_exim(uschar * const);
 extern void    log_close_all(void);
 
 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
@@ -372,13 +377,14 @@ extern int     open_cutthrough_connection( address_item * addr );
 
 extern uschar *parse_extract_address(const uschar *, uschar **, int *, int *, int *,
                  BOOL);
-extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
-                 const uschar *, uschar *, error_block **);
-extern uschar *parse_find_address_end(uschar *, BOOL);
+extern int     parse_forward_list(const uschar *, int, address_item **, uschar **,
+                 const uschar *, const uschar *, error_block **);
+extern uschar *parse_find_address_end(const uschar *, BOOL);
 extern const uschar *parse_find_at(const uschar *);
 extern const uschar *parse_fix_phrase(const uschar *, int);
 extern const uschar *parse_message_id(const uschar *, uschar **, uschar **);
-extern const uschar *parse_quote_2047(const uschar *, int, uschar *, BOOL);
+extern const uschar *parse_quote_2047(const uschar *, int, const uschar *,
+				      BOOL);
 extern const uschar *parse_date_time(const uschar *str, time_t *t);
 extern void priv_drop_temp(const uid_t, const gid_t);
 extern void priv_restore(void);
@@ -399,9 +405,9 @@ extern void    queue_run(uschar *, uschar *, BOOL);
 
 extern int     random_number(int);
 extern const uschar *rc_to_string(int);
-extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
-                 uschar *, uschar *, uschar *, ugid_block *, address_item **,
-                 uschar **, error_block **, int *, uschar *);
+extern int     rda_interpret(redirect_block *, int, const uschar *, const uschar *,
+                 const uschar *, const uschar *, const uschar *, const ugid_block *, address_item **,
+                 uschar **, error_block **, int *, const uschar *);
 extern int     rda_is_filter(const uschar *);
 extern BOOL    readconf_depends(driver_instance *, uschar *);
 extern void    readconf_driver_init(uschar *, driver_instance **,
@@ -426,8 +432,9 @@ extern void    receive_swallow_smtp(void);
 #ifdef WITH_CONTENT_SCAN
 extern int     regex(const uschar **);
 #endif
-extern BOOL    regex_match_and_setup(const pcre *, const uschar *, int, int);
-extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
+extern BOOL    regex_match(const pcre2_code *, const uschar *, int, uschar **);
+extern BOOL    regex_match_and_setup(const pcre2_code *, const uschar *, int, int);
+extern const pcre2_code *regex_must_compile(const uschar *, BOOL, BOOL);
 extern void    retry_add_item(address_item *, uschar *, int);
 extern BOOL    retry_check_address(const uschar *, host_item *, uschar *, BOOL,
                  uschar **, uschar **);
@@ -443,8 +450,8 @@ extern header_line *rewrite_header(header_line *,
 extern const uschar *rewrite_one(const uschar *, int, BOOL *, BOOL, uschar *,
                  rewrite_rule *);
 extern void    rewrite_test(const uschar *);
-extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
-                 uschar **);
+extern uschar *rfc2047_decode2(uschar *, BOOL, const uschar *, int, int *,
+				     int *, uschar **);
 extern int     route_address(address_item *, address_item **, address_item **,
                  address_item **, address_item **, int);
 extern int     route_check_prefix(const uschar *, const uschar *, unsigned *);
@@ -471,10 +478,10 @@ extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 extern void    sha1_end(hctx *, const uschar *, int, uschar *);
 extern void    sha1_mid(hctx *, const uschar *);
 extern void    sha1_start(hctx *);
-extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
-                 uschar *, address_item **, uschar **);
+extern int     sieve_interpret(const uschar *, int, const uschar *,
+		 const uschar *, const uschar *, const uschar *,
+		 address_item **, uschar **);
 extern void    sigalrm_handler(int);
-extern BOOL    smtp_buffered(void);
 extern void    smtp_closedown(uschar *);
 extern void    smtp_command_timeout_exit(void) NORETURN;
 extern void    smtp_command_sigterm_exit(void) NORETURN;
@@ -493,7 +500,8 @@ extern BOOL    smtp_get_interface(uschar *, int, address_item *,
 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 extern int     smtp_getc(unsigned);
 extern uschar *smtp_getbuf(unsigned *);
-extern void    smtp_get_cache(void);
+extern void    smtp_get_cache(unsigned);
+extern BOOL    smtp_hasc(void);
 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 extern void    smtp_log_no_mail(void);
 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
@@ -523,10 +531,12 @@ extern int     spool_write_header(uschar *, int, uschar **);
 extern int     stdin_getc(unsigned);
 extern int     stdin_feof(void);
 extern int     stdin_ferror(void);
+extern BOOL    stdin_hasc(void);
 extern int     stdin_ungetc(int);
 
 extern void    store_exit(void);
 extern void    store_init(void);
+extern void    store_writeprotect(int);
 
 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
@@ -580,6 +590,7 @@ extern uschar *string_nextinlist_trc(const uschar **listptr, int *separator, usc
 extern int     strcmpic(const uschar *, const uschar *);
 extern int     strncmpic(const uschar *, const uschar *, int);
 extern uschar *strstric(uschar *, uschar *, BOOL);
+extern const uschar *strstric_c(const uschar *, const uschar *, BOOL);
 
 extern int     test_harness_fudged_queue_time(int);
 extern void    tcp_init(void);
@@ -623,7 +634,7 @@ extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *)
 extern void    unspool_mbox(void);
 #endif
 #ifdef SUPPORT_I18N
-extern void    utf8_version_report(FILE *);
+extern gstring *utf8_version_report(gstring *);
 #endif
 
 extern int     verify_address(address_item *, FILE *, int, int, int, int,
@@ -804,11 +815,11 @@ Returns:  copy of string in new store, with letters lowercased
 */
 
 static inline uschar *
-string_copylc(const uschar *s)
+string_copylc(const uschar * s)
 {
-uschar *ss = store_get(Ustrlen(s) + 1, is_tainted(s));
-uschar *p = ss;
-while (*s != 0) *p++ = tolower(*s++);
+uschar * ss = store_get(Ustrlen(s) + 1, is_tainted(s));
+uschar * p = ss;
+while (*s) *p++ = tolower(*s++);
 *p = 0;
 return ss;
 }
@@ -830,7 +841,7 @@ Returns:    copy of string in new store, with letters lowercased
 */
 
 static inline uschar *
-string_copynlc(uschar *s, int n)
+string_copynlc(uschar * s, int n)
 {
 uschar *ss = store_get(n + 1, is_tainted(s));
 uschar *p = ss;
@@ -894,7 +905,7 @@ static inline gstring *
 string_get_tainted_trc(unsigned size, BOOL tainted, const char * func, unsigned line)
 {
 gstring * g = store_get_3(sizeof(gstring) + size, tainted, func, line);
-g->size = size;
+g->size = size;		/*XXX would be good if we could see the actual alloc size */
 g->ptr = 0;
 g->s = US(g + 1);
 return g;
@@ -983,7 +994,6 @@ could be used and would handle that implicitly. */
 static inline dns_answer *
 store_get_dns_answer_trc(const uschar * func, unsigned line)
 {
-/* return store_get_3(sizeof(dns_answer), TRUE, CCS func, line);   use tainted mem */
 return store_malloc_3(sizeof(dns_answer), CCS func, line);
 }
 
@@ -1125,20 +1135,50 @@ if (f.running_in_test_harness && f.testsuite_delays) millisleep(millisec);
 
 /******************************************************************************/
 /* Taint-checked file opens */
+static inline uschar *
+is_tainted2(const void *p, int lflags, const char* fmt, ...)
+{
+va_list ap;
+uschar *msg;
+rmark mark;
+
+if (!is_tainted(p))
+  return NULL;
+
+mark = store_mark();
+va_start(ap, fmt);
+msg = string_from_gstring(string_vformat(NULL, SVFMT_TAINT_NOCHK|SVFMT_EXTEND, fmt, ap));
+va_end(ap);
+
+#ifdef ALLOW_INSECURE_TAINTED_DATA
+if (allow_insecure_tainted_data)
+  {
+  if LOGGING(tainted) log_write(0, LOG_MAIN, "Warning: %s", msg);
+  store_reset(mark);
+  return NULL;
+  }
+#endif
+
+if (lflags) log_write(0, lflags, "%s", msg);
+return msg; /* no store_reset(), as the message might be used afterwards and Exim
+            is expected to exit anyway, so we do not care about the leaked
+            storage */
+}
 
 static inline int
 exim_open2(const char *pathname, int flags)
 {
-if (!is_tainted(pathname)) return open(pathname, flags);
-log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
+if (!is_tainted2(pathname, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname))
+  return open(pathname, flags);
 errno = EACCES;
 return -1;
 }
+
 static inline int
 exim_open(const char *pathname, int flags, mode_t mode)
 {
-if (!is_tainted(pathname)) return open(pathname, flags, mode);
-log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
+if (!is_tainted2(pathname, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname))
+  return open(pathname, flags, mode);
 errno = EACCES;
 return -1;
 }
@@ -1146,16 +1186,16 @@ return -1;
 static inline int
 exim_openat(int dirfd, const char *pathname, int flags)
 {
-if (!is_tainted(pathname)) return openat(dirfd, pathname, flags);
-log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
+if (!is_tainted2(pathname, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname))
+  return openat(dirfd, pathname, flags);
 errno = EACCES;
 return -1;
 }
 static inline int
 exim_openat4(int dirfd, const char *pathname, int flags, mode_t mode)
 {
-if (!is_tainted(pathname)) return openat(dirfd, pathname, flags, mode);
-log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
+if (!is_tainted2(pathname, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname))
+  return openat(dirfd, pathname, flags, mode);
 errno = EACCES;
 return -1;
 }
@@ -1164,8 +1204,8 @@ return -1;
 static inline FILE *
 exim_fopen(const char *pathname, const char *mode)
 {
-if (!is_tainted(pathname)) return fopen(pathname, mode);
-log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
+if (!is_tainted2(pathname, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname))
+  return fopen(pathname, mode);
 errno = EACCES;
 return NULL;
 }
@@ -1173,8 +1213,8 @@ return NULL;
 static inline DIR *
 exim_opendir(const uschar * name)
 {
-if (!is_tainted(name)) return opendir(CCS name);
-log_write(0, LOG_MAIN|LOG_PANIC, "Tainted dirname '%s'", name);
+if (!is_tainted2(name, LOG_MAIN|LOG_PANIC, "Tainted dirname '%s'", name))
+  return opendir(CCS name);
 errno = EACCES;
 return NULL;
 }
@@ -1218,6 +1258,14 @@ child_open(uschar **argv, uschar **envp, int newumask, int *infdptr,
   outfdptr, make_leader, purpose);
 }
 
+/* Return 1 if fd is usable per pollbits, else 0 */
+static inline int
+poll_one_fd(int fd, short pollbits, int tmo_millisec)
+{
+struct pollfd p = {.fd = fd, .events = pollbits};
+return poll(&p, 1, tmo_millisec);
+}
+
 # endif	/* !COMPILE_UTILITY */
 
 /******************************************************************************/