#include <sys/socket.h>
#include <string.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/tcp.h>
#include <unistd.h>
#ifdef HAVE_LIBWRAP
#include <tcpd.h>
#endif
#include "usbip_common.h"
#include "usbip_network.h"
int usbip_port = 3240;
char *usbip_port_string = "3240";
void usbip_setup_port_number(char *arg)
{
dbg("parsing port arg '%s'", arg);
char *end;
unsigned long int port = strtoul(arg, &end, 10);
if (end == arg) {
err("port: could not parse '%s' as a decimal integer", arg);
return;
}
if (*end != '\0') {
err("port: garbage at end of '%s'", arg);
return;
}
if (port > UINT16_MAX) {
err("port: %s too high (max=%d)",
arg, UINT16_MAX);
return;
}
usbip_port = port;
usbip_port_string = arg;
info("using port %d (\"%s\")", usbip_port, usbip_port_string);
}
uint32_t usbip_net_pack_uint32_t(int pack, uint32_t num)
{
uint32_t i;
if (pack)
i = htonl(num);
else
i = ntohl(num);
return i;
}
uint16_t usbip_net_pack_uint16_t(int pack, uint16_t num)
{
uint16_t i;
if (pack)
i = htons(num);
else
i = ntohs(num);
return i;
}
void usbip_net_pack_usb_device(int pack, struct usbip_usb_device *udev)
{
udev->busnum = usbip_net_pack_uint32_t(pack, udev->busnum);
udev->devnum = usbip_net_pack_uint32_t(pack, udev->devnum);
udev->speed = usbip_net_pack_uint32_t(pack, udev->speed);
udev->idVendor = usbip_net_pack_uint16_t(pack, udev->idVendor);
udev->idProduct = usbip_net_pack_uint16_t(pack, udev->idProduct);
udev->bcdDevice = usbip_net_pack_uint16_t(pack, udev->bcdDevice);
}
void usbip_net_pack_usb_interface(int pack __attribute__((unused)),
struct usbip_usb_interface *udev
__attribute__((unused)))
{
}
static ssize_t usbip_net_xmit(int sockfd, void *buff, size_t bufflen,
int sending)
{
ssize_t nbytes;
ssize_t total = 0;
if (!bufflen)
return 0;
do {
if (sending)
nbytes = send(sockfd, buff, bufflen, 0);
else
nbytes = recv(sockfd, buff, bufflen, MSG_WAITALL);
if (nbytes <= 0)
return -1;
buff = (void *)((intptr_t) buff + nbytes);
bufflen -= nbytes;
total += nbytes;
} while (bufflen > 0);
return total;
}
ssize_t usbip_net_recv(int sockfd, void *buff, size_t bufflen)
{
return usbip_net_xmit(sockfd, buff, bufflen, 0);
}
ssize_t usbip_net_send(int sockfd, void *buff, size_t bufflen)
{
return usbip_net_xmit(sockfd, buff, bufflen, 1);
}
static inline void usbip_net_pack_op_common(int pack,
struct op_common *op_common)
{
op_common->version = usbip_net_pack_uint16_t(pack, op_common->version);
op_common->code = usbip_net_pack_uint16_t(pack, op_common->code);
op_common->status = usbip_net_pack_uint32_t(pack, op_common->status);
}
int usbip_net_send_op_common(int sockfd, uint32_t code, uint32_t status)
{
struct op_common op_common;
int rc;
memset(&op_common, 0, sizeof(op_common));
op_common.version = USBIP_VERSION;
op_common.code = code;
op_common.status = status;
usbip_net_pack_op_common(1, &op_common);
rc = usbip_net_send(sockfd, &op_common, sizeof(op_common));
if (rc < 0) {
dbg("usbip_net_send failed: %d", rc);
return -1;
}
return 0;
}
int usbip_net_recv_op_common(int sockfd, uint16_t *code, int *status)
{
struct op_common op_common;
int rc;
memset(&op_common, 0, sizeof(op_common));
rc = usbip_net_recv(sockfd, &op_common, sizeof(op_common));
if (rc < 0) {
dbg("usbip_net_recv failed: %d", rc);
goto err;
}
usbip_net_pack_op_common(0, &op_common);
if (op_common.version != USBIP_VERSION) {
err("USBIP Kernel and tool version mismatch: %d %d:",
op_common.version, USBIP_VERSION);
goto err;
}
switch (*code) {
case OP_UNSPEC:
break;
default:
if (op_common.code != *code) {
dbg("unexpected pdu %#0x for %#0x", op_common.code,
*code);
*status = ST_ERROR;
goto err;
}
}
*status = op_common.status;
if (op_common.status != ST_OK) {
dbg("request failed at peer: %d", op_common.status);
goto err;
}
*code = op_common.code;
return 0;
err:
return -1;
}
int usbip_net_set_reuseaddr(int sockfd)
{
const int val = 1;
int ret;
ret = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
if (ret < 0)
dbg("setsockopt: SO_REUSEADDR");
return ret;
}
int usbip_net_set_nodelay(int sockfd)
{
const int val = 1;
int ret;
ret = setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
if (ret < 0)
dbg("setsockopt: TCP_NODELAY");
return ret;
}
int usbip_net_set_keepalive(int sockfd)
{
const int val = 1;
int ret;
ret = setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof(val));
if (ret < 0)
dbg("setsockopt: SO_KEEPALIVE");
return ret;
}
int usbip_net_set_v6only(int sockfd)
{
const int val = 1;
int ret;
ret = setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val));
if (ret < 0)
dbg("setsockopt: IPV6_V6ONLY");
return ret;
}
int usbip_net_tcp_connect(char *hostname, char *service)
{
struct addrinfo hints, *res, *rp;
int sockfd;
int ret;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
ret = getaddrinfo(hostname, service, &hints, &res);
if (ret < 0) {
dbg("getaddrinfo: %s service %s: %s", hostname, service,
gai_strerror(ret));
return ret;
}
for (rp = res; rp; rp = rp->ai_next) {
sockfd = socket(rp->ai_family, rp->ai_socktype,
rp->ai_protocol);
if (sockfd < 0)
continue;
usbip_net_set_nodelay(sockfd);
usbip_net_set_keepalive(sockfd);
if (connect(sockfd, rp->ai_addr, rp->ai_addrlen) == 0)
break;
close(sockfd);
}
freeaddrinfo(res);
if (!rp)
return EAI_SYSTEM;
return sockfd;
}
