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linux-user: Add setsockopt(SO_ATTACH_FILTER)

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This is needed to be able to run dhclient.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Laurent Vivier 2013-08-30 01:46:41 +02:00 committed by Riku Voipio
parent de6b993377
commit f57d419241
2 changed files with 56 additions and 0 deletions
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44
linux-user/syscall.c
View file

@ -106,6 +106,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#include <linux/dm-ioctl.h>
#include <linux/reboot.h>
#include <linux/route.h>
#include <linux/filter.h>
#include "linux_loop.h"
#include "cpu-uname.h"
@ -1357,6 +1358,49 @@ set_timeout:
case TARGET_SO_SNDTIMEO:
optname = SO_SNDTIMEO;
goto set_timeout;
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)) {
unlock_user_struct(tfprog, optval_addr, 1);
return -TARGET_EFAULT;
}
fprog.len = tswap16(tfprog->len);
filter = malloc(fprog.len * sizeof(*filter));
if (filter == NULL) {
unlock_user_struct(tfilter, tfprog->filter, 1);
unlock_user_struct(tfprog, optval_addr, 1);
return -TARGET_ENOMEM;
}
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)));
free(filter);
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;

12
linux-user/syscall_defs.h
View file

@ -119,6 +119,18 @@ struct target_sockaddr {
uint8_t sa_data[14];
};
struct target_sock_filter {
abi_ushort code;
uint8_t jt;
uint8_t jf;
abi_uint k;
};
struct target_sock_fprog {
abi_ushort len;
abi_ulong filter;
};
struct target_in_addr {
uint32_t s_addr; /* big endian */
};