diff options
Diffstat (limited to 'vcl-ldpreload/src/libvcl-ldpreload/vcom_socket.c')
| -rw-r--r-- | vcl-ldpreload/src/libvcl-ldpreload/vcom_socket.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/vcl-ldpreload/src/libvcl-ldpreload/vcom_socket.c b/vcl-ldpreload/src/libvcl-ldpreload/vcom_socket.c index ba8a489..0fd2bb1 100644 --- a/vcl-ldpreload/src/libvcl-ldpreload/vcom_socket.c +++ b/vcl-ldpreload/src/libvcl-ldpreload/vcom_socket.c @@ -14,6 +14,10 @@ */ #include <unistd.h> #include <stdio.h> +#include <sys/uio.h> +#include <limits.h> +#define __need_IOV_MAX +#include <bits/stdio_lim.h> #include <vppinfra/types.h> #include <vppinfra/hash.h> @@ -542,6 +546,93 @@ vcom_socket_read (int __fd, void *__buf, size_t __nbytes) } ssize_t +vcom_socket_readv (int __fd, const struct iovec * __iov, int __iovcnt) +{ + int rv; + vcom_socket_main_t *vsm = &vcom_socket_main; + uword *p; + vcom_socket_t *vsock; + ssize_t total = 0, len = 0; + + p = hash_get (vsm->sockidx_by_fd, __fd); + if (!p) + return -EBADF; + + vsock = pool_elt_at_index (vsm->vsockets, p[0]); + if (!vsock) + return -ENOTSOCK; + + if (vsock->type != SOCKET_TYPE_VPPCOM_BOUND) + return -EINVAL; + + if (__iov == 0 || __iovcnt == 0 || __iovcnt > IOV_MAX) + return -EINVAL; + + /* Sanity check */ + for (int i = 0; i < __iovcnt; ++i) + { + if (SSIZE_MAX - len < __iov[i].iov_len) + return -EINVAL; + len += __iov[i].iov_len; + } + + rv = vcom_fcntl (__fd, F_GETFL, 0); + if (rv < 0) + { + return rv; + } + + /* is blocking */ + if (!(rv & O_NONBLOCK)) + { + do + { + for (int i = 0; i < __iovcnt; ++i) + { + rv = vppcom_session_read (vsock->sid, __iov[i].iov_base, + __iov[i].iov_len); + if (rv < 0) + break; + else + { + total += rv; + if (rv < __iov[i].iov_len) + /* Read less than buffer provided, no point to continue */ + break; + } + } + } + while ((rv == -EAGAIN || rv == -EWOULDBLOCK) && total == 0); + return total; + } + + /* is non blocking */ + for (int i = 0; i < __iovcnt; ++i) + { + rv = vppcom_session_read (vsock->sid, __iov[i].iov_base, + __iov[i].iov_len); + if (rv < 0) + { + if (total > 0) + break; + else + { + errno = rv; + return rv; + } + } + else + { + total += rv; + if (rv < __iov[i].iov_len) + /* Read less than buffer provided, no point to continue */ + break; + } + } + return total; +} + +ssize_t vcom_socket_write (int __fd, const void *__buf, size_t __n) { int rv = -1; @@ -569,6 +660,46 @@ vcom_socket_write (int __fd, const void *__buf, size_t __n) return rv; } +ssize_t +vcom_socket_writev (int __fd, const struct iovec * __iov, int __iovcnt) +{ + int rv = -1; + ssize_t total = 0; + vcom_socket_main_t *vsm = &vcom_socket_main; + uword *p; + vcom_socket_t *vsock; + + p = hash_get (vsm->sockidx_by_fd, __fd); + if (!p) + return -EBADF; + + vsock = pool_elt_at_index (vsm->vsockets, p[0]); + if (!vsock) + return -ENOTSOCK; + + if (vsock->type != SOCKET_TYPE_VPPCOM_BOUND) + return -EINVAL; + + if (__iov == 0 || __iovcnt == 0 || __iovcnt > IOV_MAX) + return -EINVAL; + + for (int i = 0; i < __iovcnt; ++i) + { + rv = vppcom_session_write (vsock->sid, __iov[i].iov_base, + __iov[i].iov_len); + if (rv < 0) + { + if (total > 0) + break; + else + return rv; + } + else + total += rv; + } + return total; +} + /* * RETURN: 0 - invalid cmd * 1 - cmd not handled by vcom and vppcom |