1 files changed, 303 insertions, 0 deletions

diff --git a/tools/usb/usbip/src/usbip_network.c b/tools/usb/usbip/src/usbip_network.c
new file mode 100644
index 000000000000..b4c37e76a6e0
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_network.c
@@ -0,0 +1,303 @@
+/*
+ * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
+ *               2005-2007 Takahiro Hirofuchi
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#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);
+}
+
+void usbip_net_pack_uint32_t(int pack, uint32_t *num)
+{
+        uint32_t i;
+
+        if (pack)
+                i = htonl(*num);
+        else
+                i = ntohl(*num);
+
+        *num = i;
+}
+
+void usbip_net_pack_uint16_t(int pack, uint16_t *num)
+{
+        uint16_t i;
+
+        if (pack)
+                i = htons(*num);
+        else
+                i = ntohs(*num);
+
+        *num = i;
+}
+
+void usbip_net_pack_usb_device(int pack, struct usbip_usb_device *udev)
+{
+        usbip_net_pack_uint32_t(pack, &udev->busnum);
+        usbip_net_pack_uint32_t(pack, &udev->devnum);
+        usbip_net_pack_uint32_t(pack, &udev->speed);
+
+        usbip_net_pack_uint16_t(pack, &udev->idVendor);
+        usbip_net_pack_uint16_t(pack, &udev->idProduct);
+        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)))
+{
+        /* uint8_t members need nothing */
+}
+
+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);
+}
+
+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;
+
+        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)
+{
+        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;
+        }
+
+        PACK_OP_COMMON(0, &op_common);
+
+        if (op_common.version != USBIP_VERSION) {
+                dbg("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);
+                        goto err;
+                }
+        }
+
+        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;
+}
+
+/*
+ * IPv6 Ready
+ */
+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;
+
+        /* get all possible addresses */
+        ret = getaddrinfo(hostname, service, &hints, &res);
+        if (ret < 0) {
+                dbg("getaddrinfo: %s service %s: %s", hostname, service,
+                    gai_strerror(ret));
+                return ret;
+        }
+
+        /* try the addresses */
+        for (rp = res; rp; rp = rp->ai_next) {
+                sockfd = socket(rp->ai_family, rp->ai_socktype,
+                                rp->ai_protocol);
+                if (sockfd < 0)
+                        continue;
+
+                /* should set TCP_NODELAY for usbip */
+                usbip_net_set_nodelay(sockfd);
+                /* TODO: write code for heartbeat */
+                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;
+}