VCL-LDPRELOAD: statically link vppcom into libvcl-ldpreload.so

- Move VCL & VCL-LDPRELOAD source into src/vcl
- Statically link vppcom into libvcl-ldpreload.so

Change-Id: I778300b37e8b06640d9dbc01caf297edf7a6edb7
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>

1 files changed, 204 insertions, 0 deletions

diff --git a/src/vcl/vcom.h b/src/vcl/vcom.h
new file mode 100644
index 00000000000..da9dc5f7bf4
--- /dev/null
+++ b/src/vcl/vcom.h
@@ -0,0 +1,204 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_vcom_h
+#define included_vcom_h
+
+/* VCOM DEBUG flag.  Setting this to 1 or 0 turns off
+   ASSERT & other debugging code. */
+#ifndef VCOM_DEBUG
+#define VCOM_DEBUG 0
+#endif
+
+#include <vcl/vcom_glibc_socket.h>
+
+#define MAX_VCOM_APP_NAME  256
+
+/* Returns 0 on success or -1 on error. */
+extern int vcom_set_app_name (char *__app_name);
+
+/*
+ *
+ * File descriptor based APIs
+ *
+ */
+
+/*
+ * vpp implementation of glibc APIs from <unistd.h>
+ */
+extern int vcom_close (int __fd);
+
+extern ssize_t __wur vcom_read (int __fd, void *__buf, size_t __nbytes);
+
+extern ssize_t __wur vcom_write (int __fd, const void *__buf, size_t __n);
+
+extern ssize_t __wur vcom_readv (int __fd, const struct iovec *__iov,
+				 int __iovcnt);
+
+extern ssize_t __wur vcom_writev (int __fd, const struct iovec *__iov,
+				  int __iovcnt);
+
+/*
+ * vpp implementation of glibc APIs from <fcntl.h>
+ */
+extern int vcom_fcntl (int __fd, int __cmd, ...);
+
+/*
+ * VPP implementation of glibc APIs ioctl
+ */
+extern int vcom_ioctl (int __fd, unsigned long int __cmd, ...);
+
+/*
+ * vpp implementation of glibc APIs from <sys/select.h>
+ */
+extern int
+vcom_select (int __nfds, fd_set * __restrict __readfds,
+	     fd_set * __restrict __writefds,
+	     fd_set * __restrict __exceptfds,
+	     struct timeval *__restrict __timeout);
+
+#ifdef __USE_XOPEN2K
+extern int
+vcom_pselect (int __nfds, fd_set * __restrict __readfds,
+	      fd_set * __restrict __writefds,
+	      fd_set * __restrict __exceptfds,
+	      const struct timespec *__restrict __timeout,
+	      const __sigset_t * __restrict __sigmask);
+#endif
+
+/*
+ * vpp implementation of glibc APIs from <sys/socket.h>
+ */
+extern int __THROW vcom_socket (int __domain, int __type, int __protocol);
+
+/* On Linux, the only supported domain for this call is AF_UNIX
+* (or synonymously, AF_LOCAL). Most implementations have the
+* same restriction.
+* vpp does not implement AF_UNIX domain in this release.
+* */
+extern int __THROW
+vcom_socketpair (int __domain, int __type, int __protocol, int __fds[2]);
+
+extern int __THROW
+vcom_bind (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len);
+
+extern int __THROW
+vcom_getsockname (int __fd, __SOCKADDR_ARG __addr,
+		  socklen_t * __restrict __len);
+
+extern int
+vcom_connect (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len);
+
+extern int __THROW
+vcom_getpeername (int __fd, __SOCKADDR_ARG __addr,
+		  socklen_t * __restrict __len);
+
+extern ssize_t
+vcom_send (int __fd, const void *__buf, size_t __n, int __flags);
+
+extern ssize_t vcom_recv (int __fd, void *__buf, size_t __n, int __flags);
+
+extern ssize_t
+vcom_sendto (int __fd, const void *__buf, size_t __n,
+	     int __flags, __CONST_SOCKADDR_ARG __addr, socklen_t __addr_len);
+
+extern ssize_t
+vcom_recvfrom (int __fd, void *__restrict __buf,
+	       size_t __n, int __flags,
+	       __SOCKADDR_ARG __addr, socklen_t * __restrict __addr_len);
+
+extern ssize_t
+vcom_sendmsg (int __fd, const struct msghdr *__message, int __flags);
+
+#ifdef __USE_GNU
+extern int
+sendmmsg (int __fd, struct mmsghdr *__vmessages,
+	  unsigned int __vlen, int __flags);
+#endif
+
+extern ssize_t vcom_recvmsg (int __fd, struct msghdr *__message, int __flags);
+
+#ifdef __USE_GNU
+extern int
+vcom_recvmmsg (int __fd, struct mmsghdr *__vmessages,
+	       unsigned int __vlen, int __flags, struct timespec *__tmo);
+#endif
+
+extern int __THROW
+vcom_getsockopt (int __fd, int __level, int __optname,
+		 void *__restrict __optval, socklen_t * __restrict __optlen);
+
+extern int __THROW
+vcom_setsockopt (int __fd, int __level, int __optname,
+		 const void *__optval, socklen_t __optlen);
+
+extern int __THROW vcom_listen (int __fd, int __n);
+
+extern int
+vcom_accept (int __fd, __SOCKADDR_ARG __addr,
+	     socklen_t * __restrict __addr_len);
+
+#ifdef __USE_GNU
+/*
+ * Similar to 'accept' but takes an additional parameter to specify
+ * flags.
+ * */
+/* TBD: implemented later */
+extern int
+vcom_accept4 (int __fd, __SOCKADDR_ARG __addr,
+	      socklen_t * __restrict __addr_len, int __flags);
+#endif
+
+extern int __THROW vcom_shutdown (int __fd, int __how);
+
+extern int __THROW vcom_epoll_create (int __size);
+
+extern int __THROW vcom_epoll_create1 (int __flags);
+
+extern int __THROW
+vcom_epoll_ctl (int __epfd, int __op, int __fd, struct epoll_event *__event);
+
+extern int
+vcom_epoll_wait (int __epfd, struct epoll_event *__events,
+		 int __maxevents, int __timeout);
+
+extern int
+vcom_epoll_pwait (int __epfd, struct epoll_event *__events,
+		  int __maxevents, int __timeout, const __sigset_t * __ss);
+
+/*
+ * NOTE: observed __nfds is less than 128 from kubecon strace files
+ * for the POC, it's fair to assume that nfds is less than 1024.
+ * TBD: make it thread safe and design to scale.
+ * */
+#define MAX_POLL_NFDS_DEFAULT   1024
+extern int vcom_poll (struct pollfd *__fds, nfds_t __nfds, int __timeout);
+
+#ifdef __USE_GNU
+extern int
+vcom_ppoll (struct pollfd *__fds, nfds_t __nfds,
+	    const struct timespec *__timeout, const __sigset_t * __ss);
+#endif
+
+
+#endif /* included_vcom_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */