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#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/ucred.h>
#include <netinet/tcp.h>
#include <net/gen/in.h>
#include <net/gen/tcp.h>
#include <net/gen/tcp_io.h>
#include <net/gen/udp.h>
#include <net/gen/udp_io.h>
#include <minix/type.h>
#define DEBUG 0
static int _tcp_getsockopt(int sock, int level, int option_name,
void *__restrict option_value, socklen_t *__restrict option_len);
static int _udp_getsockopt(int sock, int level, int option_name,
void *__restrict option_value, socklen_t *__restrict option_len);
static int _uds_getsockopt(int sock, int level, int option_name,
void *__restrict option_value, socklen_t *__restrict option_len);
static void getsockopt_copy(void *return_value, size_t return_len,
void *__restrict option_value, socklen_t *__restrict option_len);
/*
* Get socket options.
*/
static int
__getsockopt(int fd, int level, int option_name,
void * __restrict option_value, socklen_t * __restrict option_len)
{
message m;
if (option_len == NULL) {
errno = EFAULT;
return -1;
}
memset(&m, 0, sizeof(m));
m.m_lc_vfs_sockopt.fd = fd;
m.m_lc_vfs_sockopt.level = level;
m.m_lc_vfs_sockopt.name = option_name;
m.m_lc_vfs_sockopt.buf = (vir_bytes)option_value;
m.m_lc_vfs_sockopt.len = *option_len;
if (_syscall(VFS_PROC_NR, VFS_GETSOCKOPT, &m) < 0)
return -1;
*option_len = m.m_vfs_lc_socklen.len;
return 0;
}
int getsockopt(int sock, int level, int option_name,
void *__restrict option_value, socklen_t *__restrict option_len)
{
int r;
nwio_tcpopt_t tcpopt;
nwio_udpopt_t udpopt;
struct sockaddr_un uds_addr;
r = __getsockopt(sock, level, option_name, option_value, option_len);
if (r != -1 || (errno != ENOTSOCK && errno != ENOSYS))
return r;
r= ioctl(sock, NWIOGTCPOPT, &tcpopt);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _tcp_getsockopt(sock, level, option_name,
option_value, option_len);
}
r= ioctl(sock, NWIOGUDPOPT, &udpopt);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _udp_getsockopt(sock, level, option_name,
option_value, option_len);
}
r= ioctl(sock, NWIOGUDSADDR, &uds_addr);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _uds_getsockopt(sock, level, option_name,
option_value, option_len);
}
errno = ENOTSOCK;
return -1;
}
static void getsockopt_copy(void *return_value, size_t return_len,
void *__restrict option_value, socklen_t *__restrict option_len)
{
/* copy as much data as possible */
if (*option_len < return_len)
memcpy(option_value, return_value, *option_len);
else
memcpy(option_value, return_value, return_len);
/* return length */
*option_len = return_len;
}
static int _tcp_getsockopt(int sock, int level, int option_name,
void *__restrict option_value, socklen_t *__restrict option_len)
{
int i, r, err;
if (level == SOL_SOCKET && option_name == SO_REUSEADDR)
{
i = 1; /* Binds to TIME_WAIT sockets never cause errors */
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
if (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
{
i = 1; /* Keepalive is always on */
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
if (level == SOL_SOCKET && option_name == SO_ERROR)
{
r = ioctl(sock, NWIOTCPGERROR, &err);
if (r != 0)
return r;
getsockopt_copy(&err, sizeof(err), option_value, option_len);
return 0;
}
if (level == SOL_SOCKET && option_name == SO_RCVBUF)
{
i = 32 * 1024; /* Receive buffer in the current
* implementation
*/
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
if (level == SOL_SOCKET && option_name == SO_SNDBUF)
{
i = 32 * 1024; /* Send buffer in the current implementation */
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
if (level == SOL_SOCKET && option_name == SO_TYPE)
{
i = SOCK_STREAM; /* this is a TCP socket */
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
if (level == IPPROTO_TCP && option_name == TCP_NODELAY)
{
i = 0; /* nodelay is always off */
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
#if DEBUG
fprintf(stderr, "_tcp_getsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOPROTOOPT;
return -1;
}
static int _udp_getsockopt(int sock, int level, int option_name,
void *__restrict option_value, socklen_t *__restrict option_len)
{
int i;
if (level == SOL_SOCKET && option_name == SO_TYPE)
{
i = SOCK_DGRAM; /* this is a UDP socket */
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
#if DEBUG
fprintf(stderr, "_udp_getsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOSYS;
return -1;
}
static int _uds_getsockopt(int sock, int level, int option_name,
void *__restrict option_value, socklen_t *__restrict option_len)
{
int i, r;
size_t size;
if (level == SOL_SOCKET && option_name == SO_RCVBUF)
{
r= ioctl(sock, NWIOGUDSRCVBUF, &size);
if (r == -1) {
return r;
}
getsockopt_copy(&size, sizeof(size), option_value, option_len);
return 0;
}
if (level == SOL_SOCKET && option_name == SO_SNDBUF)
{
r= ioctl(sock, NWIOGUDSSNDBUF, &size);
if (r == -1) {
return r;
}
getsockopt_copy(&size, sizeof(size), option_value, option_len);
return 0;
}
if (level == SOL_SOCKET && option_name == SO_TYPE)
{
r= ioctl(sock, NWIOGUDSSOTYPE, &i);
if (r == -1) {
return r;
}
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
#ifdef SO_PEERCRED
if (level == SOL_SOCKET && option_name == SO_PEERCRED)
{
struct uucred cred;
r= ioctl(sock, NWIOGUDSPEERCRED, &cred);
if (r == -1) {
return -1;
}
getsockopt_copy(&cred, sizeof(struct uucred), option_value,
option_len);
return 0;
}
#endif
if (level == SOL_SOCKET && option_name == SO_REUSEADDR)
{
i = 1; /* as long as nobody is listen()ing on the address,
* it can be reused without waiting for a
* timeout to expire.
*/
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
#ifdef SO_PASSCRED
if (level == SOL_SOCKET && option_name == SO_PASSCRED)
{
i = 1; /* option is always 'on' */
getsockopt_copy(&i, sizeof(i), option_value, option_len);
return 0;
}
#endif
#if DEBUG
fprintf(stderr, "_uds_getsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOSYS;
return -1;
}
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