+#define LTTNG_SYSCALL_ACCEPT_locvar \
+ __typeof__(upeer_sockaddr->sa_family) sa_family;\
+ uint16_t sport; \
+ uint32_t v4addr; \
+ uint16_t v6addr[8]; \
+ int v4addr_len, v6addr_len; \
+ int uaddr_len;
+
+#define LTTNG_SYSCALL_ACCEPT_code_pre \
+ sc_inout( \
+ memset(tp_locvar, 0, sizeof(*tp_locvar)); \
+ (void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->uaddr_len, \
+ upeer_addrlen, sizeof(tp_locvar->uaddr_len)); \
+ ) \
+ sc_out( \
+ if (tp_locvar->uaddr_len < sizeof(tp_locvar->sa_family)) \
+ goto skip_code; \
+ (void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->sa_family, \
+ &upeer_sockaddr->sa_family, sizeof(tp_locvar->sa_family)); \
+ switch (tp_locvar->sa_family) { \
+ case AF_INET: \
+ if (tp_locvar->uaddr_len < sizeof(struct sockaddr_in)) \
+ goto skip_code; \
+ (void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->sport, \
+ &((struct sockaddr_in __user *) upeer_sockaddr)->sin_port, \
+ sizeof(tp_locvar->sport)); \
+ (void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->v4addr, \
+ &((struct sockaddr_in __user *) upeer_sockaddr)->sin_addr.s_addr, \
+ sizeof(tp_locvar->v4addr)); \
+ tp_locvar->v4addr_len = 4; \
+ break; \
+ case AF_INET6: \
+ if (tp_locvar->uaddr_len < sizeof(struct sockaddr_in6)) \
+ goto skip_code; \
+ (void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->sport, \
+ &((struct sockaddr_in6 __user *) upeer_sockaddr)->sin6_port, \
+ sizeof(tp_locvar->sport)); \
+ if (lib_ring_buffer_copy_from_user_check_nofault(tp_locvar->v6addr, \
+ &((struct sockaddr_in6 __user *) upeer_sockaddr)->sin6_addr.in6_u.u6_addr8, \
+ sizeof(tp_locvar->v6addr))) \
+ memset(tp_locvar->v6addr, 0, sizeof(tp_locvar->v6addr)); \
+ tp_locvar->v6addr_len = 8; \
+ break; \
+ } \
+ skip_code: \
+ )
+