linux-user: Add support for setsockopt() option SOL_ALG
Add support for options SOL_ALG of the syscall setsockopt(). This
option is used in relation to Linux kernel Crypto API, and allows
a user to set additional information for the cipher operation via
syscall setsockopt(). The field "optname" must be one of the
following:
- ALG_SET_KEY – seting the key
- ALG_SET_AEAD_AUTHSIZE – set the authentication tag size
SOL_ALG is relatively newer setsockopt() option. Therefore, the
code that handles SOL_ALG is enclosed in "ifdef" so that the build
does not fail for older kernels that do not contain support for
SOL_ALG. "ifdef" also contains check if ALG_SET_KEY and
ALG_SET_AEAD_AUTHSIZE are defined.
Signed-off-by: Yunqiang Su <ysu@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <1560953834-29584-3-git-send-email-aleksandar.markovic@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index e942049..ed1c9b0 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -102,6 +102,7 @@
#include <linux/blkpg.h>
#include <netpacket/packet.h>
#include <linux/netlink.h>
+#include <linux/if_alg.h>
#include "linux_loop.h"
#include "uname.h"
@@ -1941,6 +1942,36 @@
goto unimplemented;
}
break;
+#if defined(SOL_ALG) && defined(ALG_SET_KEY) && defined(ALG_SET_AEAD_AUTHSIZE)
+ case SOL_ALG:
+ switch (optname) {
+ case ALG_SET_KEY:
+ {
+ char *alg_key = g_malloc(optlen);
+
+ if (!alg_key) {
+ return -TARGET_ENOMEM;
+ }
+ if (copy_from_user(alg_key, optval_addr, optlen)) {
+ g_free(alg_key);
+ return -TARGET_EFAULT;
+ }
+ ret = get_errno(setsockopt(sockfd, level, optname,
+ alg_key, optlen));
+ g_free(alg_key);
+ break;
+ }
+ case ALG_SET_AEAD_AUTHSIZE:
+ {
+ ret = get_errno(setsockopt(sockfd, level, optname,
+ NULL, optlen));
+ break;
+ }
+ default:
+ goto unimplemented;
+ }
+ break;
+#endif
case TARGET_SOL_SOCKET:
switch (optname) {
case TARGET_SO_RCVTIMEO:
