[Bug 2956] New: using "sftp root@[2001::16%eth0]", output error: Could not resolve hostname: Name or service not known
https://bugzilla.mindrot.org/show_bug.cgi?id=2956
Bug ID: 2956
Summary: using "sftp root@[2001::16%eth0]", output error: Could
not resolve hostname: Name or service not known
Product: Portable OpenSSH
Version: 7.9p1
Hardware: ix86
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: sftp
Assignee: unassigned-b...@mindrot.org
Reporter: xuchun...@huawei.com
when using sftp to connect ipv6 address without path, error happens
like this:
sftp root@[2001::16%eth0]
ssh: Could not resolve hostname [2001::16%eth0]: Name
or service not known
Connection closed.
Connection closed
openssh version is:
openssh-clients-7.8p1-3.fc29.x86_64
OS is fedora29 x86
i try to analyse the error output,
when parse_user_host_path, colon funciton:
char *
colon(char *cp)
{
int flag = 0;
if (*cp == ':') /* Leading colon is part of file name.
*/
return NULL;
if (*cp == '[')
flag = 1;
for (; *cp; ++cp) {
if (*cp == '@' && *(cp+1) == '[')
flag = 1;
if (*cp == ']' && *(cp+1) == ':' && flag)
return (cp+1);
if (*cp == ':' && !flag)
return (cp);
if (*cp == '/')
return NULL;
}
return NULL;
}
after ']' there must be ':', otherwise return NULL, then the whole arg
"root@[2001::16%eth0]" be treated as a plain hostname, host
resolv failed.
here is my solution:
---
misc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/misc.c b/misc.c
index bdc06fd..84dc451 100644
--- a/misc.c
+++ b/misc.c
@@ -557,6 +557,8 @@ colon(char *cp)
flag = 1;
if (*cp == ']' && *(cp+1) == ':' && flag)
return (cp+1);
+ if (*cp == ']' && *(cp+1) == '\0' && flag)
+ return (cp+1);
if (*cp == ':' && !flag)
return (cp);
if (*cp == '/')
--
please check.
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