From: Scott Lovenberg <scott.lovenberg@xxxxxxxxx>
The standard for formatting IPv6 addresses is to enclose them in brackets.
This patch allows the mount helper to parse IPv6 addresses that are enclosed in brackets.
There is a slight change of behavior in this patch; specifying the --ip option without
supplying an address now exits the mount helper rather than just ignoring and continuing.
Signed-off-by: Scott Lovenberg <scott.lovenberg@xxxxxxxxx>
---
AUTHORS | 1 +
mount.cifs.c | 63 ++++++++++++++++++++++++++++++++++++++++++----------------
2 files changed, 47 insertions(+), 17 deletions(-)
diff --git a/AUTHORS b/AUTHORS
index 2807079..081c2fe 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -5,5 +5,6 @@ Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
Suresh Jayaraman <sjayaraman@xxxxxxx>
Pavel Shilovsky <piastry@xxxxxxxxxxx>
Igor Druzhinin <jaxbrigs@xxxxxxxxx>
+Scott Lovenberg <scott.lovenberg@xxxxxxxxx>
...and others.
diff --git a/mount.cifs.c b/mount.cifs.c
index 3b2b89e..276f50d 100644
--- a/mount.cifs.c
+++ b/mount.cifs.c
@@ -751,6 +751,48 @@ static int parse_opt_token(const char *token)
return OPT_ERROR;
}
+/*
+ Extract an ipv4 or ipv6 address and put it into parsed_info.
+ Returns 0 on success.
+*/
+static int parse_ip(char *value, struct parsed_mount_info *parsed_info)
+{
+ char *closingBracket = NULL;
+
+ if (!value || !*value) {
+ fprintf(stderr, "target ip address argument missing\n");
+ return OPT_ERROR;
+ }
+
+ /* check for ipv6 in brackets */
+ if (value[0] == '[') {
+ value++;
+ /* temporarily null the closing bracket */
+ closingBracket = strchr(value, ']');
+ if (closingBracket)
+ *closingBracket = '\0';
+ }
+
+ /* check length of address*/
+ if (strnlen(value, MAX_ADDRESS_LEN + 1) > MAX_ADDRESS_LEN) {
+ fprintf(stderr, "ip address too long\n");
+ if (closingBracket)
+ *closingBracket = ']';
+ return EX_USAGE;
+ }
+
+ /* all test pass, copy it */
+ strcpy(parsed_info->addrlist, value);
+ if (parsed_info->verboseflag)
+ fprintf(stderr, "ip address %s override specified\n", value);
+
+ /* put back closing bracket */
+ if (closingBracket)
+ *closingBracket = ']';
+
+ return 0;
+}
+
static int
parse_options(const char *data, struct parsed_mount_info *parsed_info)
{
@@ -861,23 +903,10 @@ parse_options(const char *data, struct parsed_mount_info *parsed_info)
break;
case OPT_IP:
- if (!value || !*value) {
- fprintf(stderr,
- "target ip address argument missing\n");
- } else if (strnlen(value, MAX_ADDRESS_LEN) <=
- MAX_ADDRESS_LEN) {
- strcpy(parsed_info->addrlist, value);
- if (parsed_info->verboseflag)
- fprintf(stderr,
- "ip address %s override specified\n",
- value);
- goto nocopy;
- } else {
- fprintf(stderr, "ip address too long\n");
- return EX_USAGE;
-
- }
- break;
+ rc = parse_ip(value, parsed_info);
+ if (rc)
+ return rc;
+ goto nocopy;
/* unc || target || path */
case OPT_UNC:
--
1.7.10.4
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