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/*
* Copyright 2015 Google Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/*
* Author: xiaoj@google.com (Xiao Jia)
*
* Interface for packetdrill.
*
* To be tested against as a shared object (*.so) file, implement this
* interface, export a function "packetdrill_interface_init", and
* initialize the interface struct passed in with your own functions.
*/
#ifndef __PACKETDRILL_H__
#define __PACKETDRILL_H__
#include <poll.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/epoll.h>
#include <unistd.h>
struct packetdrill_interface {
void *userdata;
void (*free)(void *userdata);
int (*socket)(void *userdata, int domain, int type, int protocol);
int (*bind)(void *userdata, int sockfd, const struct sockaddr *addr,
socklen_t addrlen);
int (*listen)(void *userdata, int sockfd, int backlog);
int (*accept)(void *userdata, int sockfd, struct sockaddr *addr,
socklen_t *addrlen);
int (*connect)(void *userdata, int sockfd, const struct sockaddr *addr,
socklen_t addrlen);
ssize_t (*read)(void *userdata, int fd, void *buf, size_t count);
ssize_t (*readv)(void *userdata, int fd, const struct iovec *iov,
int iovcnt);
ssize_t (*recv)(void *userdata, int sockfd, void *buf, size_t len,
int flags);
ssize_t (*recvfrom)(void *userdata, int sockfd, void *buf, size_t len,
int flags, struct sockaddr *src_addr,
socklen_t *addrlen);
ssize_t (*recvmsg)(void *userdata, int sockfd, struct msghdr *msg,
int flags);
ssize_t (*write)(void *userdata, int fd, const void *buf, size_t count);
ssize_t (*writev)(void *userdata, int fd, const struct iovec *iov,
int iovcnt);
ssize_t (*send)(void *userdata, int sockfd, const void *buf, size_t len,
int flags);
ssize_t (*sendto)(void *userdata, int sockfd, const void *buf,
size_t len, int flags,
const struct sockaddr *dest_addr, socklen_t addrlen);
ssize_t (*sendmsg)(void *userdata, int sockfd, const struct msghdr *msg,
int flags);
int (*fcntl)(void *userdata, int fd, int cmd, ...);
int (*ioctl)(void *userdata, int fd, unsigned long request, ...);
int (*close)(void *userdata, int fd);
int (*shutdown)(void *userdata, int sockfd, int how);
int (*getsockopt)(void *userdata, int sockfd, int level, int optname,
void *optval, socklen_t *optlen);
int (*setsockopt)(void *userdata, int sockfd, int level, int optname,
const void *optval, socklen_t optlen);
int (*poll)(void *userdata, struct pollfd *fds, nfds_t nfds,
int timeout);
/* Send @count bytes of data starting from @buf to the TCP stack.
* Return 0 on success or -1 on error. */
int (*netdev_send)(void *userdata, const void *buf, size_t count);
/* Sniff the next packet leaving the TCP stack.
* Put packet data in @buf. @count is passed in as the buffer size.
* The actual number of bytes received should be put in @count.
* Set @count to 0 if received nothing.
* Set @time_usecs to the receive timestamp.
* Return 0 on success or -1 on error. */
int (*netdev_receive)(void *userdata, void *buf, size_t *count,
long long *time_usecs);
int (*usleep)(void *userdata, useconds_t usec);
int (*gettimeofday)(void *userdata, struct timeval *tv,
struct timezone *tz);
int (*epoll_create)(void *userdata, int size);
int (*epoll_ctl)(void *userdata, int epfd, int op, int fd,
struct epoll_event *event);
int (*epoll_wait)(void *userdata, int epfd, struct epoll_event *events,
int maxevents, int timeout);
int (*pipe)(void *userdata, int pipefd[2]);
int (*splice)(void *userdata, int fd_in, loff_t *off_in, int fd_out,
loff_t *off_out, size_t len, unsigned int flags);
};
typedef void (*packetdrill_interface_init_t)(const char *flags,
struct packetdrill_interface *);
void
packetdrill_interface_init(const char *flags, struct packetdrill_interface *ifc);
#endif /* __PACKETDRILL_H__ */
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