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// SPDX-License-Identifier: GPL-2.0-or-later
/* seitan - Syscall Expressive Interpreter, Transformer and Notifier
*
* cooker/calls/net.c - Description of known networking system calls
*
* Copyright 2023 Red Hat GmbH
* Author: Stefano Brivio <sbrivio@redhat.com>
*/
/*
fd = socket(family, type stream/dgram/..., protocol)
fd = connect(fd, addr, addrlen)
fd = accept(fd, addr, addrlen)
n = sendto(fd, buf, len, flags, dst addr, addrlen)
n = recvfrom(fd, buf, len, flags, src addr, addrlen)
n = sendmsg(fd, msg, flags)
n = recvmsg(fd, msg, flags)
e = shutdown(fd, rd/wr/rdwr)
e = bind(fd, addr, addrlen)
e = listen(fd, backlog)
e = getsockname(fd, bound addr, addrlen)
e = getpeername(fd, peer addr, addrlen)
e = socketpair(family, type stream/dgram/..., sockets[2])
e = setsockopt(fd, level, optname, *optval, optlen)
e = getsockopt(fd, level, optname, *optval, *optlen)
n = recvmmsg(fd, *msgvec, vlen, flags, *timeout)
n = sendmmsg(fd, *msgvec, vlen, flags)
*/
#include <asm-generic/unistd.h>
#include <sys/syscall.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/un.h>
#include <linux/netlink.h>
#include "../cooker.h"
#include "../calls.h"
static struct num af[] = {
{ "unix", AF_UNIX },
{ "ipv4", AF_INET },
{ "ipv6", AF_INET6 },
{ "netlink", AF_NETLINK },
{ "packet", AF_PACKET },
{ "vsock", AF_VSOCK },
{ 0 },
};
static struct num socket_types[] = {
{ "stream", SOCK_STREAM },
{ "dgram", SOCK_DGRAM },
{ "seq", SOCK_SEQPACKET },
{ "raw", SOCK_RAW },
{ "packet", SOCK_PACKET },
{ 0 },
};
static struct num socket_flags[] = {
{ "nonblock", SOCK_NONBLOCK },
{ "cloexec", SOCK_CLOEXEC },
{ 0 },
};
static struct num protocols[] = {
{ "ip", IPPROTO_IP },
{ "icmp", IPPROTO_ICMP },
{ "igmp", IPPROTO_IGMP },
{ "tcp", IPPROTO_TCP },
{ "udp", IPPROTO_UDP },
{ "ipv6", IPPROTO_IPV6 },
{ "gre", IPPROTO_GRE },
{ "esp", IPPROTO_ESP },
{ "ah", IPPROTO_AH },
{ "sctp", IPPROTO_SCTP },
{ "udplite", IPPROTO_UDPLITE },
{ "mpls", IPPROTO_MPLS },
{ "raw", IPPROTO_RAW },
{ "mptcp", IPPROTO_MPTCP },
{ 0 },
};
static struct arg socket_args[] = {
{ 0,
{
"family", INT, 0, 0, 0,
{ .d_num = af }
}
},
{ 1,
{
"type", INT, MASK, 0, 0,
{ .d_num = socket_types }
}
},
{ 1,
{
"flags", INT, MASK | FLAGS, 0, 0,
{ .d_num = socket_flags }
}
},
{ 2,
{
"protocol", INT, 0, 0, 0,
{ .d_num = protocols }
}
},
{ 0 },
};
static struct field connect_addr_unix[] = {
{
"path", STRING, 0,
offsetof(struct sockaddr_un, sun_path),
UNIX_PATH_MAX, { 0 }
},
{ 0 },
};
static struct field connect_addr_ipv4[] = {
{
"port", PORT, 0,
offsetof(struct sockaddr_in, sin_port),
0, { 0 }
},
{
"addr", IPV4, 0,
offsetof(struct sockaddr_in, sin_addr),
0, { 0 }
},
{ 0 },
};
static struct field connect_addr_ipv6[] = {
{
"port", PORT, 0,
offsetof(struct sockaddr_in6, sin6_port),
0, { 0 }
},
{
"addr", IPV6, 0,
offsetof(struct sockaddr_in6, sin6_addr),
0, { 0 }
},
{ 0 },
};
static struct field connect_addr_nl[] = {
{
"pid", PID, 0,
offsetof(struct sockaddr_nl, nl_pid),
0, { 0 }
},
{
"groups", U32, 0,
offsetof(struct sockaddr_nl, nl_groups),
0, { 0 }
},
{ 0 },
};
static struct field connect_family = {
"family", USHORT, 0,
offsetof(struct sockaddr, sa_family),
0, { .d_num = af }
};
static struct select_num connect_addr_select_family[] = {
{ AF_UNIX, sizeof(struct sockaddr_un),
{ 1,
{
NULL, STRUCT, 0, 0, 0,
{ .d_struct = connect_addr_unix }
}
}
},
{ AF_INET, sizeof(struct sockaddr_in),
{ 1,
{
NULL, STRUCT, 0, 0, 0,
{ .d_struct = connect_addr_ipv4 }
}
}
},
{ AF_INET6, sizeof(struct sockaddr_in6),
{ 1,
{
NULL, STRUCT, 0, 0, 0,
{ .d_struct = connect_addr_ipv6 }
}
}
},
{ AF_NETLINK, sizeof(struct sockaddr_nl),
{ 1,
{
NULL, STRUCT, 0, 0, 0,
{ .d_struct = connect_addr_nl }
}
}
},
{ 0 },
};
static struct select connect_addr_select = {
&connect_family, { .d_num = connect_addr_select_family }
};
static struct arg connect_args[] = {
{ 0,
{
"fd", INT, 0,
0,
0,
{ 0 },
},
},
{ 0,
{
"path", FDPATH, 0,
0,
0,
{ 0 },
},
},
{ 1,
{
"addr", SELECT, 0,
0,
sizeof(struct sockaddr_storage),
{ .d_select = &connect_addr_select },
},
},
{ 2,
{
"addrlen", LONG, SIZE,
0,
0,
{ .d_size = (intptr_t)&connect_addr_select },
},
},
{ 0 }
};
struct call syscalls_net[] = {
{ __NR_connect, "connect", connect_args },
{ __NR_bind, "bind", connect_args },
{ __NR_socket, "socket", socket_args },
{ 0 },
};
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