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linux/include/asm-i386
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Catherine Zhang 877ce7c1b3 [AF_UNIX]: Datagram getpeersec 
This patch implements an API whereby an application can determine the
label of its peer's Unix datagram sockets via the auxiliary data mechanism of
recvmsg.

Patch purpose:

This patch enables a security-aware application to retrieve the
security context of the peer of a Unix datagram socket.  The application
can then use this security context to determine the security context for
processing on behalf of the peer who sent the packet.

Patch design and implementation:

The design and implementation is very similar to the UDP case for INET
sockets.  Basically we build upon the existing Unix domain socket API for
retrieving user credentials.  Linux offers the API for obtaining user
credentials via ancillary messages (i.e., out of band/control messages
that are bundled together with a normal message).  To retrieve the security
context, the application first indicates to the kernel such desire by
setting the SO_PASSSEC option via getsockopt.  Then the application
retrieves the security context using the auxiliary data mechanism.

An example server application for Unix datagram socket should look like this:

toggle = 1;
toggle_len = sizeof(toggle);

setsockopt(sockfd, SOL_SOCKET, SO_PASSSEC, &toggle, &toggle_len);
recvmsg(sockfd, &msg_hdr, 0);
if (msg_hdr.msg_controllen > sizeof(struct cmsghdr)) {
    cmsg_hdr = CMSG_FIRSTHDR(&msg_hdr);
    if (cmsg_hdr->cmsg_len <= CMSG_LEN(sizeof(scontext)) &&
        cmsg_hdr->cmsg_level == SOL_SOCKET &&
        cmsg_hdr->cmsg_type == SCM_SECURITY) {
        memcpy(&scontext, CMSG_DATA(cmsg_hdr), sizeof(scontext));
    }
}

sock_setsockopt is enhanced with a new socket option SOCK_PASSSEC to allow
a server socket to receive security context of the peer.

Testing:

We have tested the patch by setting up Unix datagram client and server
applications.  We verified that the server can retrieve the security context
using the auxiliary data mechanism of recvmsg.

Signed-off-by: Catherine Zhang <cxzhang@watson.ibm.com>
Acked-by: Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-29 16:58:06 -07:00
..
mach-bigsmp [PATCH] x86: convert bigsmp to use flat physical mode 2006-01-06 08:33:37 -08:00
mach-default Merge branch 'x86-64' 2006-06-26 10:51:09 -07:00
mach-es7000 [PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386) 2006-03-23 07:38:04 -08:00
mach-generic [PATCH] x86: sutomatically enable bigsmp when we have more than 8 CPUs 2005-09-05 00:06:10 -07:00
mach-numaq [PATCH] Do not enforce unique IO_APIC_ID check for xAPIC systems (i386) 2005-06-23 09:45:09 -07:00
mach-summit [PATCH] Time: i386 Conversion - part 2: Rework TSC Support 2006-06-26 09:58:21 -07:00
mach-visws [PATCH] fix sgivwfb compile 2006-06-29 10:26:19 -07:00
mach-voyager [PATCH] Clean up and refactor i386 sub-architecture setup 2006-06-25 10:00:55 -07:00
8253pit.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
a.out.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
acpi.h [PATCH] don't call check_acpi_pci() on x86 with ACPI disabled 2006-03-22 07:53:54 -08:00
agp.h [PATCH] i386: inline asm cleanup 2005-09-05 00:06:11 -07:00
alternative.h [PATCH] x86_64: x86_64 version of the smp alternative patch. 2006-06-26 10:48:14 -07:00
apic.h [PATCH] x86_64: nmi watchdog header cleanup 2006-06-26 10:48:16 -07:00
apicdef.h x86_64: Remove stale lapic definition from apicdef.h 2006-04-01 22:50:03 -05:00
arch_hooks.h [PATCH] x86: early printk handling fixes 2006-03-23 07:38:05 -08:00
atomic.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
auxvec.h [PATCH] auxiliary vector cleanups 2005-09-07 16:57:21 -07:00
bitops.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
boot.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
bug.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
bugs.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
byteorder.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cache.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cacheflush.h [PATCH] x86/x86_64: mark rodata section read only: x86 parts 2006-01-06 08:33:36 -08:00
checksum.h [NET]: Fix ipl=>ihl typo in ip_fast_csum 2005-08-29 16:02:48 -07:00
cpu.h [PATCH] Register sysfs file for hotplugged new node 2006-06-27 17:32:36 -07:00
cpufeature.h [PATCH] x86_64: i386/x86-64 Add nmi watchdog support for new Intel CPUs 2006-06-26 10:48:22 -07:00
cputime.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
current.h [PATCH] mark several functions __always_inline 2006-01-14 18:27:15 -08:00
debugreg.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
delay.h [PATCH] Time: i386 Conversion - part 3: Enable Generic Timekeeping 2006-06-26 09:58:21 -07:00
desc.h [PATCH] x86: fix broken SMP boot sequence 2006-02-24 14:31:38 -08:00
div64.h [PATCH] include/asm-i386/: "extern inline" -> "static inline" 2005-09-10 10:06:34 -07:00
dma-mapping.h [PATCH] i386: make pci_map_single/pci_map_sg warn for zero length. 2006-01-11 19:04:56 -08:00
dma.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
dmi.h [PATCH] x86_64: Implement early DMI scanning 2006-03-25 09:10:55 -08:00
dwarf2.h [PATCH] i386: reliable stack trace support i386 entry.S 2006-06-26 10:48:17 -07:00
e820.h [PATCH] x86_64: Introduce e820_all_mapped 2006-04-09 11:53:50 -07:00
edac.h [PATCH] EDAC: core EDAC support code 2006-01-18 19:20:31 -08:00
elf.h [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
emergency-restart.h [PATCH] i386: Implement machine_emergency_reboot 2005-07-26 14:35:42 -07:00
errno.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fcntl.h [PATCH] Clean up struct flock64 definitions 2005-09-07 16:57:38 -07:00
fixmap.h [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
floppy.h [PATCH] random: remove SA_SAMPLE_RANDOM from floppy driver 2006-06-25 10:01:00 -07:00
futex.h [PATCH] lightweight robust futexes updates 2006-03-27 08:44:49 -08:00
genapic.h [PATCH] Do not enforce unique IO_APIC_ID check for xAPIC systems (i386) 2005-06-23 09:45:09 -07:00
hardirq.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
highmem.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
hpet.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
hw_irq.h [PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend() 2006-06-29 10:26:23 -07:00
i387.h [PATCH] i386: fix broken FP exception handling 2006-04-29 14:13:16 -07:00
i8253.h [PATCH] x86: i8253/i8259A lock cleanup 2005-06-30 08:45:10 -07:00
i8259.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ide.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
intel_arch_perfmon.h [PATCH] x86_64: i386/x86-64 Add nmi watchdog support for new Intel CPUs 2006-06-26 10:48:22 -07:00
io.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
io_apic.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-05-24 09:22:21 +01:00
ioctl.h [PATCH] Generic ioctl.h 2006-01-10 08:01:34 -08:00
ioctls.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ipc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ipcbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
irq.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ist.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
k8.h [PATCH] x86_64: Clean and enhance up K8 northbridge access code 2006-06-26 10:48:15 -07:00
kdebug.h [PATCH] Notify page fault call chain for i386 2006-06-26 09:58:22 -07:00
kexec.h [PATCH] Kdump: i386 compiler warning fix 2006-01-10 08:01:27 -08:00
kmap_types.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
kprobes.h [PATCH] Notify page fault call chain 2006-06-26 09:58:22 -07:00
ldt.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
linkage.h [PATCH] i386: fix prevent_tail_call 2005-05-26 16:16:16 -07:00
local.h [PATCH] x86_64: Fix race in cpu_local_* on preemptible kernels 2006-06-26 10:48:21 -07:00
math_emu.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mc146818rtc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mca.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mca_dma.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mce.h [PATCH] Don't trigger full rebuild via CONFIG_X86_MCE 2006-06-23 07:42:56 -07:00
mman.h [PATCH] add asm-generic/mman.h 2006-02-15 15:32:22 -08:00
mmu.h [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
mmu_context.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
mmx.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmzone.h [PATCH] unify pfn_to_page: i386 pfn_to_page 2006-03-27 08:44:44 -08:00
module.h [PATCH] Base support for AMD Geode GX/LX processors 2006-01-06 08:33:38 -08:00
mpspec.h [PATCH] mptspec: remove duplicate #include 2006-04-11 06:18:34 -07:00
mpspec_def.h [PATCH] mpspec: remove unneeded packed attribute 2006-01-06 08:33:39 -08:00
msgbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
msi.h [PATCH] PCI: cleanup unused variable about msi driver 2006-06-21 12:00:00 -07:00
msr.h [PATCH] x86: more asm cleanups 2005-09-05 00:06:12 -07:00
mtrr.h [PATCH] Don't trigger full rebuild via CONFIG_MTRR 2006-06-23 07:42:56 -07:00
mutex.h [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
namei.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
nmi.h [PATCH] x86_64: nmi watchdog header cleanup 2006-06-26 10:48:16 -07:00
numa.h [PATCH] x86-64: Use ACPI PXM to parse PCI<->node assignments 2005-09-12 10:49:57 -07:00
numaq.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
page.h [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
param.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
parport.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci-direct.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
percpu.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pgalloc.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
pgtable-2level-defs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pgtable-2level.h [PATCH] x86/PAE: Fix pte_clear for the >4GB RAM case 2006-04-27 12:00:59 -07:00
pgtable-3level-defs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pgtable-3level.h [PATCH] x86/PAE: Fix pte_clear for the >4GB RAM case 2006-04-27 12:00:59 -07:00
pgtable.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-04-29 01:42:26 +01:00
poll.h [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
posix_types.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
processor.h [PATCH] i386: move phys_proc_id and cpu_core_id to cpuinfo_x86 2006-06-27 17:32:37 -07:00
ptrace.h [PATCH] PTRACE_SYSEMU is only for i386 and clashes with other ptrace codes of other archs 2006-01-08 20:14:04 -08:00
resource.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rtc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rwlock.h [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
rwsem.h [PATCH] add sem_is_read/write_locked() 2005-10-29 21:40:35 -07:00
scatterlist.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
seccomp.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sections.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
segment.h [PATCH] x86: Pnp segments in segment h 2006-01-06 08:33:34 -08:00
semaphore.h [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
sembuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
serial.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
setup.h [PATCH] Clean up and refactor i386 sub-architecture setup 2006-06-25 10:00:55 -07:00
shmbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
shmparam.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sigcontext.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
siginfo.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal.h [PATCH] Handle TIF_RESTORE_SIGMASK for i386 2006-01-18 19:20:29 -08:00
smp.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
socket.h [AF_UNIX]: Datagram getpeersec 2006-06-29 16:58:06 -07:00
sockios.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sparsemem.h [PATCH] sparsemem memory model for i386 2005-06-23 09:45:05 -07:00
spinlock.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
spinlock_types.h [PATCH] spinlock consolidation 2005-09-10 10:06:21 -07:00
srat.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
stat.h [PATCH] 2TB files: st_blocks is invalid when calling stat64 2006-03-26 08:57:00 -08:00
statfs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
string.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
suspend.h [PATCH] i386: Use loaddebug macro consistently 2005-04-16 15:24:46 -07:00
system.h spelling fixes 2006-06-26 18:35:02 +02:00
termbits.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
termios.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
thread_info.h [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
timer.h [PATCH] Time: i386 Conversion - part 3: Enable Generic Timekeeping 2006-06-26 09:58:21 -07:00
timex.h [PATCH] Time: i386 Conversion - part 2: Rework TSC Support 2006-06-26 09:58:21 -07:00
tlb.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tlbflush.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
topology.h [PATCH] sched: mc/smt power savings sched policy 2006-06-27 17:32:45 -07:00
tsc.h [PATCH] Time: i386 Conversion - part 2: Rework TSC Support 2006-06-26 09:58:21 -07:00
types.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
uaccess.h [PATCH] Make copy_from_user_inatomic NOT zero the tail on i386 2006-06-25 10:01:09 -07:00
ucontext.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unaligned.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unistd.h [PATCH] sys_move_pages: 32bit support (i386, x86_64) 2006-06-23 07:42:53 -07:00
unwind.h [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
vga.h [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
vic.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
vm86.h [PATCH] Make vm86 support optional 2006-01-08 20:14:11 -08:00
voyager.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
xor.h [PATCH] i386: inline asm cleanup 2005-09-05 00:06:11 -07:00