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author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2020-09-09 23:49:51 +0200 |
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committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2020-09-10 00:46:44 +0200 |
commit | 08224f38acdf5e391dda43e4e004e4ddc5c00302 (patch) | |
tree | 3c7eb4bf60702d068395a6c67dff1d43c9dcf2fb /src/shared/socket-netlink.c | |
parent | a73569f180dbb8690ae3b350b0609ac0f9705c55 (diff) | |
download | systemd-08224f38acdf5e391dda43e4e004e4ddc5c00302.tar.gz |
Use sockaddr_un_set_path() in socket_address_parse()
Two functional changes:
- "/" is now refused. The test is adjusted.
- The trailing NUL is *not* included in the returned size for abstract size. The
comments in sockaddr_un_set_path() indicate that this is the right thing to do,
and the code in socket_address_parse() wasn't doing that.
Diffstat (limited to 'src/shared/socket-netlink.c')
-rw-r--r-- | src/shared/socket-netlink.c | 33 |
1 files changed, 7 insertions, 26 deletions
diff --git a/src/shared/socket-netlink.c b/src/shared/socket-netlink.c index 76b68dfa1c..23970dbe55 100644 --- a/src/shared/socket-netlink.c +++ b/src/shared/socket-netlink.c @@ -62,37 +62,18 @@ int socket_address_parse(SocketAddress *a, const char *s) { assert(a); assert(s); - if (*s == '/') { + if (IN_SET(*s, '/', '@')) { /* AF_UNIX socket */ + struct sockaddr_un un; - size_t l = strlen(s); - if (l >= sizeof(a->sockaddr.un.sun_path)) /* Note that we refuse non-NUL-terminated sockets when - * parsing (the kernel itself is less strict here in what it - * accepts) */ - return -EINVAL; - - *a = (SocketAddress) { - .sockaddr.un.sun_family = AF_UNIX, - .size = offsetof(struct sockaddr_un, sun_path) + l + 1, - }; - memcpy(a->sockaddr.un.sun_path, s, l); - - } else if (*s == '@') { - /* Abstract AF_UNIX socket */ - - size_t l = strlen(s+1); - if (l >= sizeof(a->sockaddr.un.sun_path) - 1) /* Note that we refuse non-NUL-terminated sockets here - * when parsing, even though abstract namespace sockets - * explicitly allow embedded NUL bytes and don't consider - * them special. But it's simply annoying to debug such - * sockets. */ - return -EINVAL; + r = sockaddr_un_set_path(&un, s); + if (r < 0) + return r; *a = (SocketAddress) { - .sockaddr.un.sun_family = AF_UNIX, - .size = offsetof(struct sockaddr_un, sun_path) + 1 + l, + .sockaddr.un = un, + .size = r, }; - memcpy(a->sockaddr.un.sun_path+1, s+1, l); } else if (startswith(s, "vsock:")) { /* AF_VSOCK socket in vsock:cid:port notation */ |