From 8ced3317ed7c9e5e04d58c0ccddb7cd0eea141d8 Mon Sep 17 00:00:00 2001
From: Tilghman Lesher <tilghman@meg.abyt.es>
Date: Thu, 15 Apr 2010 21:26:19 +0000
Subject: Merged revisions 257544 via svnmerge from
 https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r257544 | tilghman | 2010-04-15 16:23:24 -0500 (Thu, 15 Apr 2010) | 6 lines

  Allow application options with arguments to contain parentheses, through a variety of escaping techniques.

  Fixes SWP-1194 (ABE-2143).

  Review: https://reviewboard.asterisk.org/r/604/
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@257560 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 main/app.c | 88 ++++++++++++++++++++++++++++++++++++--------------------------
 1 file changed, 51 insertions(+), 37 deletions(-)

(limited to 'main/app.c')

diff --git a/main/app.c b/main/app.c
index 0619151d8..bfdec4fdd 100644
--- a/main/app.c
+++ b/main/app.c
@@ -1809,13 +1809,19 @@ char *ast_read_textfile(const char *filename)
 	return output;
 }
 
-int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags *flags, char **args, char *optstr)
+static int parse_options(const struct ast_app_option *options, void *_flags, char **args, char *optstr, int flaglen)
 {
 	char *s, *arg;
 	int curarg, res = 0;
 	unsigned int argloc;
+	struct ast_flags *flags = _flags;
+	struct ast_flags64 *flags64 = _flags;
 
-	ast_clear_flag(flags, AST_FLAGS_ALL);
+	if (flaglen == 32) {
+		ast_clear_flag(flags, AST_FLAGS_ALL);
+	} else {
+		flags64->flags = 0;
+	}
 
 	if (!optstr) {
 		return 0;
@@ -1826,8 +1832,40 @@ int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags
 		curarg = *s++ & 0x7f;	/* the array (in app.h) has 128 entries */
 		argloc = options[curarg].arg_index;
 		if (*s == '(') {
+			int paren = 1, quote = 0;
+			int parsequotes = (s[1] == '"') ? 1 : 0;
+
 			/* Has argument */
 			arg = ++s;
+			for (; *s; s++) {
+				if (*s == '(' && !quote) {
+					paren++;
+				} else if (*s == ')' && !quote) {
+					/* Count parentheses, unless they're within quotes (or backslashed, below) */
+					paren--;
+				} else if (*s == '"' && parsequotes) {
+					/* Leave embedded quotes alone, unless they are the first character */
+					quote = quote ? 0 : 1;
+					ast_copy_string(s, s + 1, INT_MAX);
+					s--;
+				} else if (*s == '\\') {
+					if (!quote) {
+						/* If a backslash is found outside of quotes, remove it */
+						ast_copy_string(s, s + 1, INT_MAX);
+					} else if (quote && s[1] == '"') {
+						/* Backslash for a quote character within quotes, remove the backslash */
+						ast_copy_string(s, s + 1, INT_MAX);
+					} else {
+						/* Backslash within quotes, keep both characters */
+						s++;
+					}
+				}
+
+				if (paren == 0) {
+					break;
+				}
+			}
+			/* This will find the closing paren we found above, or none, if the string ended before we found one. */
 			if ((s = strchr(s, ')'))) {
 				if (argloc) {
 					args[argloc - 1] = arg;
@@ -1841,48 +1879,24 @@ int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags
 		} else if (argloc) {
 			args[argloc - 1] = "";
 		}
-		ast_set_flag(flags, options[curarg].flag);
+		if (flaglen == 32) {
+			ast_set_flag(flags, options[curarg].flag);
+		} else {
+			ast_set_flag64(flags64, options[curarg].flag);
+		}
 	}
 
 	return res;
 }
 
-int ast_app_parse_options64(const struct ast_app_option *options, struct ast_flags64 *flags, char **args, char *optstr)
+int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags *flags, char **args, char *optstr)
 {
-	char *s, *arg;
-	int curarg, res = 0;
-	unsigned int argloc;
-
-	flags->flags = 0;
-
-	if (!optstr) {
-		return 0;
-	}
-
-	s = optstr;
-	while (*s) {
-		curarg = *s++ & 0x7f;	/* the array (in app.h) has 128 entries */
-		ast_set_flag64(flags, options[curarg].flag);
-		argloc = options[curarg].arg_index;
-		if (*s == '(') {
-			/* Has argument */
-			arg = ++s;
-			if ((s = strchr(s, ')'))) {
-				if (argloc) {
-					args[argloc - 1] = arg;
-				}
-				*s++ = '\0';
-			} else {
-				ast_log(LOG_WARNING, "Missing closing parenthesis for argument '%c' in string '%s'\n", curarg, arg);
-				res = -1;
-				break;
-			}
-		} else if (argloc) {
-			args[argloc - 1] = NULL;
-		}
-	}
+	return parse_options(options, flags, args, optstr, 32);
+}
 
-	return res;
+int ast_app_parse_options64(const struct ast_app_option *options, struct ast_flags64 *flags, char **args, char *optstr)
+{
+	return parse_options(options, flags, args, optstr, 64);
 }
 
 void ast_app_options2str64(const struct ast_app_option *options, struct ast_flags64 *flags, char *buf, size_t len)
-- 
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