ssize_t INTERPOSE(recvmsg)(int fd, struct msghdr *msg, int flags)
{
__real_recvmsg_init();
const bool bypass_filter =
getenv("SIXJACK_BYPASS") != NULL || is_socket(fd) == false;
struct sockaddr_storage sa_local, *sa_local_ = &sa_local;
socklen_t sa_local_len;
get_sock_info(fd, &sa_local_, &sa_local_len, NULL, NULL);
int ret = 0;
int ret_errno = 0;
bool bypass_call = false;
size_t nbyte = (size_t) 0U;
struct iovec * const vecs = msg->msg_iov;
size_t i_vecs = 0U;
while (i_vecs < (size_t) msg->msg_iovlen) {
assert(SIZE_MAX - nbyte >= vecs[i_vecs].iov_len);
nbyte += vecs[i_vecs].iov_len;
i_vecs++;
}
size_t new_nbyte = nbyte;
FilterReplyResultBase rb = {
.pre = true, .ret = &ret, .ret_errno = &ret_errno, .fd = fd
};
if (bypass_filter == false && (rb.filter = filter_get()) &&
filter_apply(&rb, sa_local_, sa_local_len, msg,
&new_nbyte, &flags)
== FILTER_REPLY_BYPASS) {
bypass_call = true;
}
if (bypass_call == false) {
ssize_t ret_ = __real_recvmsg(fd, msg, flags);
ret_errno = errno;
ret = (int) ret_;
assert((ssize_t) ret_ == ret);
}
if (bypass_filter == false) {
new_nbyte = ret;
rb.pre = false;
filter_apply(&rb, sa_local_, sa_local_len, msg,
&new_nbyte, &flags);
}
errno = ret_errno;
return ret;
}
ssize_t __wrap_recvmsg(int fd, struct msghdr * msg, int flags)
{
if (fd >= __pse51_rtdm_fd_start) {
int ret, oldtype;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype);
ret = set_errno(XENOMAI_SKINCALL3(__pse51_rtdm_muxid,
__rtdm_recvmsg,
fd - __pse51_rtdm_fd_start,
msg, flags));
pthread_setcanceltype(oldtype, NULL);
return ret;
} else
return __real_recvmsg(fd, msg, flags);
}
