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[Qemu-devel] [PATCH 1/2] linux-user: Add setsockopt(SO_ATTACH_FILTER)
From: |
Laurent Vivier |
Subject: |
[Qemu-devel] [PATCH 1/2] linux-user: Add setsockopt(SO_ATTACH_FILTER) |
Date: |
Mon, 31 Dec 2012 20:37:59 +0100 |
This is needed to be able to run dhclient.
Signed-off-by: Laurent Vivier <address@hidden>
---
linux-user/syscall.c | 34 +++++++++++++++++++++++++++++++++-
linux-user/syscall_defs.h | 12 ++++++++++++
2 files changed, 45 insertions(+), 1 deletion(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index e99adab..000b640 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -98,6 +98,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#include <linux/fb.h>
#include <linux/vt.h>
#include <linux/dm-ioctl.h>
+#include <linux/filter.h>
#include "linux_loop.h"
#include "cpu-uname.h"
@@ -1491,6 +1492,38 @@ static abi_long do_setsockopt(int sockfd, int level, int
optname,
break;
case TARGET_SOL_SOCKET:
switch (optname) {
+ case TARGET_SO_ATTACH_FILTER: {
+ struct target_sock_fprog *tfprog;
+ struct target_sock_filter *tfilter;
+ struct sock_fprog fprog;
+ struct sock_filter *filter;
+ int i;
+
+ if (optlen != sizeof(*tfprog))
+ return -TARGET_EINVAL;
+ if (!lock_user_struct(VERIFY_READ, tfprog, optval_addr, 0))
+ return -TARGET_EFAULT;
+ if (!lock_user_struct(VERIFY_READ, tfilter,
+ tswapal(tfprog->filter), 0))
+ return -TARGET_EFAULT;
+
+ fprog.len = tswap16(tfprog->len);
+ filter = alloca(fprog.len * sizeof(*filter));
+ for (i = 0; i < fprog.len; i ++) {
+ filter[i].code = tswap16(tfilter[i].code);
+ filter[i].jt = tfilter[i].jt;
+ filter[i].jf = tfilter[i].jf;
+ filter[i].k = tswap32(tfilter[i].k);
+ }
+ fprog.filter = filter;
+
+ ret = get_errno(setsockopt(sockfd, SOL_SOCKET,
+ SO_ATTACH_FILTER, &fprog, sizeof(fprog)));
+
+ unlock_user_struct(tfilter, tfprog->filter, 1);
+ unlock_user_struct(tfprog, optval_addr, 1);
+ return ret;
+ }
/* Options with 'int' argument. */
case TARGET_SO_DEBUG:
optname = SO_DEBUG;
@@ -1548,7 +1581,6 @@ static abi_long do_setsockopt(int sockfd, int level, int
optname,
case TARGET_SO_SNDTIMEO:
optname = SO_SNDTIMEO;
break;
- break;
default:
goto unimplemented;
}
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index d4589e7..501735f 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -119,6 +119,18 @@ struct target_sockaddr {
uint8_t sa_data[14];
};
+struct target_sock_filter {
+ target_ushort code;
+ uint8_t jt;
+ uint8_t jf;
+ target_uint k;
+};
+
+struct target_sock_fprog {
+ target_ushort len;
+ abi_ulong filter;
+};
+
struct target_in_addr {
uint32_t s_addr; /* big endian */
};
--
1.7.10.4