118     int getpeername (int fd, sockaddr *addr, socklen_t *len)

   118     int getpeername (int fd, sockaddr *addr, socklen_t *len)

   119 

   119 

   120     ssize_t send (int fd, void *buf, size_t n, int flags)

   120     ssize_t send (int fd, void *buf, size_t n, int flags)

   121     ssize_t recv (int fd, void *buf, size_t n, int flags)

   121     ssize_t recv (int fd, void *buf, size_t n, int flags)

   122     ssize_t sendto (int fd, void *buf, size_t n, int flags, sockaddr *addr, socklen_t addr_len)

   122     ssize_t sendto (int fd, void *buf, size_t n, int flags, sockaddr *addr, socklen_t addr_len)

   124     ssize_t sendmsg (int fd, msghdr *msg, int flags)

   124     ssize_t sendmsg (int fd, msghdr *msg, int flags)

   125     ssize_t recvmsg (int fd, msghdr *msg, int flags)

   125     ssize_t recvmsg (int fd, msghdr *msg, int flags)

   126 

   126 

   127     int getsockopt (int fd, int level, int optname, void *optval, socklen_t optlen)

   127     int getsockopt (int fd, int level, int optname, void *optval, socklen_t optlen)

   128     int setsockopt (int fd, int level, int optname, void *optval, socklen_t optlen)

   128     int setsockopt (int fd, int level, int optname, void *optval, socklen_t optlen)