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7#include <sys/socket.h>
8
9#include <string.h>
10
11#include <arpa/inet.h>
12#include <netdb.h>
13#include <netinet/tcp.h>
14#include <unistd.h>
15
16#ifdef HAVE_LIBWRAP
17#include <tcpd.h>
18#endif
19
20#include "usbip_common.h"
21#include "usbip_network.h"
22
23int usbip_port = 3240;
24char *usbip_port_string = "3240";
25
26void usbip_setup_port_number(char *arg)
27{
28 dbg("parsing port arg '%s'", arg);
29 char *end;
30 unsigned long int port = strtoul(arg, &end, 10);
31
32 if (end == arg) {
33 err("port: could not parse '%s' as a decimal integer", arg);
34 return;
35 }
36
37 if (*end != '\0') {
38 err("port: garbage at end of '%s'", arg);
39 return;
40 }
41
42 if (port > UINT16_MAX) {
43 err("port: %s too high (max=%d)",
44 arg, UINT16_MAX);
45 return;
46 }
47
48 usbip_port = port;
49 usbip_port_string = arg;
50 info("using port %d (\"%s\")", usbip_port, usbip_port_string);
51}
52
53void usbip_net_pack_uint32_t(int pack, uint32_t *num)
54{
55 uint32_t i;
56
57 if (pack)
58 i = htonl(*num);
59 else
60 i = ntohl(*num);
61
62 *num = i;
63}
64
65void usbip_net_pack_uint16_t(int pack, uint16_t *num)
66{
67 uint16_t i;
68
69 if (pack)
70 i = htons(*num);
71 else
72 i = ntohs(*num);
73
74 *num = i;
75}
76
77void usbip_net_pack_usb_device(int pack, struct usbip_usb_device *udev)
78{
79 usbip_net_pack_uint32_t(pack, &udev->busnum);
80 usbip_net_pack_uint32_t(pack, &udev->devnum);
81 usbip_net_pack_uint32_t(pack, &udev->speed);
82
83 usbip_net_pack_uint16_t(pack, &udev->idVendor);
84 usbip_net_pack_uint16_t(pack, &udev->idProduct);
85 usbip_net_pack_uint16_t(pack, &udev->bcdDevice);
86}
87
88void usbip_net_pack_usb_interface(int pack __attribute__((unused)),
89 struct usbip_usb_interface *udev
90 __attribute__((unused)))
91{
92
93}
94
95static ssize_t usbip_net_xmit(int sockfd, void *buff, size_t bufflen,
96 int sending)
97{
98 ssize_t nbytes;
99 ssize_t total = 0;
100
101 if (!bufflen)
102 return 0;
103
104 do {
105 if (sending)
106 nbytes = send(sockfd, buff, bufflen, 0);
107 else
108 nbytes = recv(sockfd, buff, bufflen, MSG_WAITALL);
109
110 if (nbytes <= 0)
111 return -1;
112
113 buff = (void *)((intptr_t) buff + nbytes);
114 bufflen -= nbytes;
115 total += nbytes;
116
117 } while (bufflen > 0);
118
119 return total;
120}
121
122ssize_t usbip_net_recv(int sockfd, void *buff, size_t bufflen)
123{
124 return usbip_net_xmit(sockfd, buff, bufflen, 0);
125}
126
127ssize_t usbip_net_send(int sockfd, void *buff, size_t bufflen)
128{
129 return usbip_net_xmit(sockfd, buff, bufflen, 1);
130}
131
132int usbip_net_send_op_common(int sockfd, uint32_t code, uint32_t status)
133{
134 struct op_common op_common;
135 int rc;
136
137 memset(&op_common, 0, sizeof(op_common));
138
139 op_common.version = USBIP_VERSION;
140 op_common.code = code;
141 op_common.status = status;
142
143 PACK_OP_COMMON(1, &op_common);
144
145 rc = usbip_net_send(sockfd, &op_common, sizeof(op_common));
146 if (rc < 0) {
147 dbg("usbip_net_send failed: %d", rc);
148 return -1;
149 }
150
151 return 0;
152}
153
154int usbip_net_recv_op_common(int sockfd, uint16_t *code, int *status)
155{
156 struct op_common op_common;
157 int rc;
158
159 memset(&op_common, 0, sizeof(op_common));
160
161 rc = usbip_net_recv(sockfd, &op_common, sizeof(op_common));
162 if (rc < 0) {
163 dbg("usbip_net_recv failed: %d", rc);
164 goto err;
165 }
166
167 PACK_OP_COMMON(0, &op_common);
168
169 if (op_common.version != USBIP_VERSION) {
170 err("USBIP Kernel and tool version mismatch: %d %d:",
171 op_common.version, USBIP_VERSION);
172 goto err;
173 }
174
175 switch (*code) {
176 case OP_UNSPEC:
177 break;
178 default:
179 if (op_common.code != *code) {
180 dbg("unexpected pdu %#0x for %#0x", op_common.code,
181 *code);
182
183 *status = ST_ERROR;
184 goto err;
185 }
186 }
187
188 *status = op_common.status;
189
190 if (op_common.status != ST_OK) {
191 dbg("request failed at peer: %d", op_common.status);
192 goto err;
193 }
194
195 *code = op_common.code;
196
197 return 0;
198err:
199 return -1;
200}
201
202int usbip_net_set_reuseaddr(int sockfd)
203{
204 const int val = 1;
205 int ret;
206
207 ret = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
208 if (ret < 0)
209 dbg("setsockopt: SO_REUSEADDR");
210
211 return ret;
212}
213
214int usbip_net_set_nodelay(int sockfd)
215{
216 const int val = 1;
217 int ret;
218
219 ret = setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
220 if (ret < 0)
221 dbg("setsockopt: TCP_NODELAY");
222
223 return ret;
224}
225
226int usbip_net_set_keepalive(int sockfd)
227{
228 const int val = 1;
229 int ret;
230
231 ret = setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof(val));
232 if (ret < 0)
233 dbg("setsockopt: SO_KEEPALIVE");
234
235 return ret;
236}
237
238int usbip_net_set_v6only(int sockfd)
239{
240 const int val = 1;
241 int ret;
242
243 ret = setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val));
244 if (ret < 0)
245 dbg("setsockopt: IPV6_V6ONLY");
246
247 return ret;
248}
249
250
251
252
253int usbip_net_tcp_connect(char *hostname, char *service)
254{
255 struct addrinfo hints, *res, *rp;
256 int sockfd;
257 int ret;
258
259 memset(&hints, 0, sizeof(hints));
260 hints.ai_family = AF_UNSPEC;
261 hints.ai_socktype = SOCK_STREAM;
262
263
264 ret = getaddrinfo(hostname, service, &hints, &res);
265 if (ret < 0) {
266 dbg("getaddrinfo: %s service %s: %s", hostname, service,
267 gai_strerror(ret));
268 return ret;
269 }
270
271
272 for (rp = res; rp; rp = rp->ai_next) {
273 sockfd = socket(rp->ai_family, rp->ai_socktype,
274 rp->ai_protocol);
275 if (sockfd < 0)
276 continue;
277
278
279 usbip_net_set_nodelay(sockfd);
280
281 usbip_net_set_keepalive(sockfd);
282
283 if (connect(sockfd, rp->ai_addr, rp->ai_addrlen) == 0)
284 break;
285
286 close(sockfd);
287 }
288
289 freeaddrinfo(res);
290
291 if (!rp)
292 return EAI_SYSTEM;
293
294 return sockfd;
295}
296
