[PATCH 4/6] ipset: Rework the "fake" argument parsing for ipset restore.

[Oliver <oliver@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

From: Oliver Smith <oliver@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

This reworks the argument parsing functionality of ipset to handle
quote-delimited lines in such a way that they are considered to be a
single argument.

This commit is necessary for ipset to successfully restore sets that
have comments.

Signed-off-by: Oliver Smith <oliver@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
 src/ipset.c | 40 +++++++++++++++++++++++++++++++++-------
 1 file changed, 33 insertions(+), 7 deletions(-)

diff --git a/src/ipset.c b/src/ipset.c
index 4f308da..d9d609c 100644
--- a/src/ipset.c
+++ b/src/ipset.c
@@ -159,20 +159,44 @@ ipset_print_file(const char *fmt, ...)
 static void
 build_argv(char *buffer)
 {
-	char *ptr;
+	char *ptr, *tmp;
 	int i;
 
 	/* Reset */
-	for (i = 1; i < newargc; i++)
+	for (i = 1; i < newargc; i++) {
+		if(newargv[i])
+			free(newargv[i]);
 		newargv[i] = NULL;
+	}
 	newargc = 1;
 
 	ptr = strtok(buffer, " \t\r\n");
-	newargv[newargc++] = ptr;
+	newargv[newargc] = calloc(strlen(ptr) + 1, sizeof(*ptr));
+	ipset_strlcpy(newargv[newargc++], ptr, strlen(ptr) + 1);
 	while ((ptr = strtok(NULL, " \t\r\n")) != NULL) {
-		if ((newargc + 1) < (int)(sizeof(newargv)/sizeof(char *)))
-			newargv[newargc++] = ptr;
-		else {
+		if ((newargc + 1) < (int)(sizeof(newargv)/sizeof(char *))) {
+			tmp = newargv[newargc] = calloc(strlen(ptr) + 1,
+							sizeof(*ptr));
+			if(*ptr == '"') {
+				ipset_strlcpy(tmp, ptr + 1, (strlen(ptr) + 1) *
+					      sizeof(*ptr));
+				ipset_strlcat(tmp, " ", (strlen(ptr) + 1) *
+					      sizeof(*ptr));
+				while((ptr = strtok(NULL, "\"")) != NULL) {
+					if(*ptr == '\n' || *ptr == '\r')
+						continue;
+					tmp = realloc(tmp, (strlen(tmp) +
+						      strlen(ptr) + 1) *
+						      sizeof(*ptr));
+					ipset_strlcat(tmp, ptr, (strlen(tmp) +
+						      strlen(ptr) + 1) *
+						      sizeof(*ptr));
+				}
+			} else
+				ipset_strlcpy(tmp, ptr, (strlen(ptr) + 1) *
+					      sizeof(*ptr));
+			newargv[newargc++] = tmp;
+		} else {
 			exit_error(PARAMETER_PROBLEM,
 				   "Line is too long to parse.");
 			return;
@@ -195,7 +219,8 @@ restore(char *argv0)
 
 	/* Initialize newargv/newargc */
 	newargc = 0;
-	newargv[newargc++] = argv0;
+	newargv[newargc] = calloc(strlen(argv0) + 1, sizeof(*argv0));
+	ipset_strlcpy(newargv[newargc++], argv0, strlen(argv0) + 1);
 	if (filename) {
 		fd = fopen(filename, "r");
 		if (!fd) {
@@ -232,6 +257,7 @@ restore(char *argv0)
 	if (ret < 0)
 		handle_error();
 
+	free(newargv[0]);
 	return ret;
 }
 
-- 
1.8.3.2

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