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[[!meta copyright="Copyright © 2010, 2011 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
[[!tag open_issue_glibc]]
IRC, unknown channel, unknown date.
<pinotree> Credentials: s_uid 1000, c_uid 1000, c_gid 100, c_pid 2722
<pinotree> 2722: Credentials: s_uid 1000, c_uid 1000, c_gid 100, c_pid 2724
<pinotree> \o/
<youpi> \o/
<pinotree> the patch is even short, after all: http://paste.debian.net/54795/
--- a/sysdeps/mach/hurd/sendmsg.c
+++ b/sysdeps/mach/hurd/sendmsg.c
@@ -18,6 +18,7 @@
#include <errno.h>
#include <string.h>
+#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
@@ -45,6 +46,7 @@
mach_msg_type_number_t amount;
int dealloc = 0;
int i;
+ struct sockaddr_storage sa;
/* Find the total number of bytes to be written. */
len = 0;
@@ -122,6 +124,34 @@
err = EIEIO;
}
+ memset (&sa, 0, sizeof (struct sockaddr_storage));
+ if (addr)
+ {
+ memcpy (&sa, addr, addr_len);
+ }
+ else
+ {
+ getsockname (fd, (struct sockaddr *) &sa, &addr_len);
+ }
+ addr = (struct sockaddr_un *) &sa;
+ if (message && (addr->sun_family == AF_LOCAL))
+ {
+ struct cmsghdr *cm;
+ struct msghdr *m = (struct msghdr *) message;
+ for (cm = CMSG_FIRSTHDR (m); cm; cm = CMSG_NXTHDR (m, cm))
+ {
+ if (cm->cmsg_level == SOL_SOCKET && cm->cmsg_type == SCM_CREDS)
+ {
+ struct cmsgcred *cred = (struct cmsgcred *) CMSG_DATA (cm);
+ cred->cmcred_pid = __getpid ();
+ cred->cmcred_uid = __getuid ();
+ cred->cmcred_euid = __geteuid ();
+ cred->cmcred_gid = __getgid ();
+ cred->cmcred_ngroups = getgroups (sizeof (cred->cmcred_groups) / sizeof (gid_t), cred->cmcred_groups);
+ }
+ }
+ }
+
err = HURD_DPORT_USE (fd,
({
if (err)
<youpi> what checks that the pid is correct?
<youpi> and uid, etc.
<pinotree> hm?
<youpi> credential is not only about one claiming to the other his uid & such
<youpi> it's about the kernel or whatever authority tell to an end the identity of the other end
<pinotree> yep
<pinotree> but given that the data is then send to pflocal, this code is the last part that runs on the application side
<youpi> pflocal could as well just request the info from proc
<youpi> it will have to anyway, to check that it's true
<pinotree> hm
<pinotree> yeah, though about that, chose this approach as "quicker" (of course not definitive)
<youpi> well at least it shows we're able to transmit something :)
<pinotree> well it just manipulates the data which gets send nicely already ;)
<youpi> but really, it's most probably up to pflocal to check authentication from proc and give it to the other end
<youpi> the application sender part would be just the RPC authentication calls
<youpi> Mmm, just realizing: so receiver part already exists actually, right?
<youpi> (since it's just about letting the application reading from the message structure)
<pinotree> yep
<youpi> ok, good :)
---
See also [[pflocal_socket_credentials_for_local_sockets]] and [[pflocal_reauth]].
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