системные вызовы сокетов (socket system calls)
Имя (Name)
socketcall - socket system calls
Синопсис (Synopsis)
#include <linux/net.h> /* Definition of SYS_* constants */
#include <sys/syscall.h> /* Definition of SYS_socketcall */
#include <unistd.h>
int syscall(SYS_socketcall, int call, unsigned long *args);
Note: glibc provides no wrapper for socketcall(), necessitating
the use of syscall(2).
Описание (Description)
socketcall() is a common kernel entry point for the socket system
calls. call determines which socket function to invoke. args
points to a block containing the actual arguments, which are
passed through to the appropriate call.
User programs should call the appropriate functions by their
usual names. Only standard library implementors and kernel
hackers need to know about socketcall().
call Man page
SYS_SOCKET socket(2)
SYS_BIND bind(2)
SYS_CONNECT connect(2)
SYS_LISTEN listen(2)
SYS_ACCEPT accept(2)
SYS_GETSOCKNAME getsockname(2)
SYS_GETPEERNAME getpeername(2)
SYS_SOCKETPAIR socketpair(2)
SYS_SEND send(2)
SYS_RECV recv(2)
SYS_SENDTO sendto(2)
SYS_RECVFROM recvfrom(2)
SYS_SHUTDOWN shutdown(2)
SYS_SETSOCKOPT setsockopt(2)
SYS_GETSOCKOPT getsockopt(2)
SYS_SENDMSG sendmsg(2)
SYS_RECVMSG recvmsg(2)
SYS_ACCEPT4 accept4(2)
SYS_RECVMMSG recvmmsg(2)
SYS_SENDMMSG sendmmsg(2)
Стандарты (Conforming to)
This call is specific to Linux, and should not be used in
programs intended to be portable.
Примечание (Note)
On some architectures—for example, x86-64 and ARM—there is no
socketcall() system call; instead socket(2), accept(2), bind(2),
and so on really are implemented as separate system calls.
On x86-32, socketcall() was historically the only entry point for
the sockets API. However, starting in Linux 4.3, direct system
calls are provided on x86-32 for the sockets API. This
facilitates the creation of seccomp(2) filters that filter
sockets system calls (for new user-space binaries that are
compiled to use the new entry points) and also provides a (very)
small performance improvement.
Смотри также (See also)
accept(2), bind(2), connect(2), getpeername(2), getsockname(2),
getsockopt(2), listen(2), recv(2), recvfrom(2), recvmsg(2),
send(2), sendmsg(2), sendto(2), setsockopt(2), shutdown(2),
socket(2), socketpair(2)
