1 | //////////////////////////////////////////////////////////////////////////////// |
---|
2 | // Copyright (c) 2004 Xilinx, Inc. All rights reserved. |
---|
3 | // |
---|
4 | // Xilinx, Inc. |
---|
5 | // XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A |
---|
6 | // COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS |
---|
7 | // ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR |
---|
8 | // STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION |
---|
9 | // IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE |
---|
10 | // FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION. |
---|
11 | // XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO |
---|
12 | // THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO |
---|
13 | // ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE |
---|
14 | // FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY |
---|
15 | // AND FITNESS FOR A PARTICULAR PURPOSE. |
---|
16 | // |
---|
17 | // File : xilsock.c |
---|
18 | // Date : 2002, March 20. |
---|
19 | // Author : Sathya Thammanur |
---|
20 | // Company: Xilinx |
---|
21 | // Group : Emerging Software Technologies |
---|
22 | // |
---|
23 | // Summary: |
---|
24 | // Xilinx internal socket related functions (xilsock functions) |
---|
25 | // |
---|
26 | // $Id: xilsock.c,v 1.2.8.6 2005/11/15 23:41:10 salindac Exp $ |
---|
27 | // |
---|
28 | //////////////////////////////////////////////////////////////////////////////// |
---|
29 | |
---|
30 | //////////////////////////////////////////////////////////////////////////////// |
---|
31 | // see copyright.txt for Rice University/Mango Communications modifications |
---|
32 | //////////////////////////////////////////////////////////////////////////////// |
---|
33 | |
---|
34 | #include <xilnet_xilsock.h> |
---|
35 | |
---|
36 | /* buffers for sending and receiving packets */ |
---|
37 | unsigned char recvbuf[LINK_FRAME_LEN]; |
---|
38 | unsigned char sendbuf[LINK_FRAME_LEN]; |
---|
39 | unsigned char mb_ip_addr[IP_VERSION] = {0,0,0,0}; /* microblaze ip address , currently set to 127.0.0.0 */ |
---|
40 | unsigned char mb_hw_addr[ETH_ADDR_LEN] = {0x00,0x60,0x08,0x11,0x27,0x7b}; /* microblaze hardware address */ |
---|
41 | |
---|
42 | unsigned char sync_IP_octet = 255; |
---|
43 | |
---|
44 | struct xilsock_socket xilsock_sockets[NO_OF_XILSOCKS]; |
---|
45 | /* gives the status of the received packet */ |
---|
46 | int xilsock_status_flag = 0; |
---|
47 | |
---|
48 | /* |
---|
49 | * Initialisation of xilsock_sockets |
---|
50 | */ |
---|
51 | |
---|
52 | unsigned char is_xilsock_init = 0; |
---|
53 | |
---|
54 | int xilsock_init (void) { |
---|
55 | |
---|
56 | int i; |
---|
57 | if (!is_xilsock_init) { |
---|
58 | for (i = 0; i < NO_OF_XILSOCKS; i++) { |
---|
59 | xilsock_sockets[i].type = 0; |
---|
60 | xilsock_sockets[i].domain = 0; |
---|
61 | xilsock_sockets[i].proto = 0; |
---|
62 | xilsock_sockets[i].listen = 0; |
---|
63 | xilsock_sockets[i].bound = 0; |
---|
64 | xilsock_sockets[i].accept = 0; |
---|
65 | xilsock_sockets[i].connect = 0; |
---|
66 | xilsock_sockets[i].closing = 0; |
---|
67 | xilsock_sockets[i].closed = 0; |
---|
68 | xilsock_sockets[i].free = 1; |
---|
69 | xilsock_sockets[i].conn.tcp_conn = NULL; |
---|
70 | xilsock_sockets[i].recvbuf.buf = NULL; |
---|
71 | xilsock_sockets[i].recvbuf.size = 0; |
---|
72 | } |
---|
73 | is_xilsock_init = 1; |
---|
74 | } |
---|
75 | return is_xilsock_init; |
---|
76 | } |
---|
77 | |
---|
78 | |
---|
79 | /* |
---|
80 | * Release a socket |
---|
81 | */ |
---|
82 | |
---|
83 | void xilsock_rel_socket (int sd) { |
---|
84 | |
---|
85 | if (xilsock_sockets[sd].type == SOCK_STREAM) { |
---|
86 | xilsock_sockets[sd].conn.tcp_conn = NULL; |
---|
87 | } |
---|
88 | else { |
---|
89 | xilsock_sockets[sd].conn.udp_conn = NULL; |
---|
90 | } |
---|
91 | xilsock_sockets[sd].type = 0; |
---|
92 | xilsock_sockets[sd].domain = 0; |
---|
93 | xilsock_sockets[sd].proto = 0; |
---|
94 | xilsock_sockets[sd].listen = 0; |
---|
95 | xilsock_sockets[sd].bound = 0; |
---|
96 | xilsock_sockets[sd].accept = 0; |
---|
97 | xilsock_sockets[sd].connect = 0; |
---|
98 | xilsock_sockets[sd].closing = 0; |
---|
99 | xilsock_sockets[sd].closed = 0; |
---|
100 | xilsock_sockets[sd].free = 1; |
---|
101 | xilsock_sockets[sd].recvbuf.buf = NULL; |
---|
102 | xilsock_sockets[sd].recvbuf.size = 0; |
---|
103 | |
---|
104 | } |
---|
105 | |
---|
106 | |
---|
107 | /* |
---|
108 | * Allocate a xilsock_socket and return socket descriptor |
---|
109 | * if not able to alloc socket, return -1 |
---|
110 | */ |
---|
111 | |
---|
112 | int xilsock_socket(int domain, int type, int proto) { |
---|
113 | |
---|
114 | int sd; |
---|
115 | |
---|
116 | // find a free xilsock_socket |
---|
117 | if (!xilsock_init()) |
---|
118 | return (-1); |
---|
119 | for (sd = 0; sd < NO_OF_XILSOCKS; sd++) { |
---|
120 | if (xilsock_sockets[sd].free) { |
---|
121 | // initialise the socket & make it unavailable |
---|
122 | xilsock_sockets[sd].domain = domain; |
---|
123 | xilsock_sockets[sd].type = type; |
---|
124 | xilsock_sockets[sd].proto = proto; |
---|
125 | xilsock_sockets[sd].free = 0; |
---|
126 | return sd; |
---|
127 | } |
---|
128 | } |
---|
129 | // return as no sockets available |
---|
130 | return -1; |
---|
131 | } |
---|
132 | |
---|
133 | |
---|
134 | /* |
---|
135 | * bind a socket to the specified address. |
---|
136 | * binds addr to socket sd. returns 1 if bound |
---|
137 | * returns -1 if not able to bind |
---|
138 | */ |
---|
139 | |
---|
140 | int xilsock_bind(int sd, struct sockaddr* addr, int addrlen) { |
---|
141 | |
---|
142 | int connd; |
---|
143 | |
---|
144 | // open a tcp conn/udp conn |
---|
145 | if (xilsock_sockets[sd].type == SOCK_STREAM) { |
---|
146 | if ( (connd = xilnet_tcp_open_conn (((struct sockaddr_in*)addr)->sin_port)) == -1) { |
---|
147 | print("bind: tcp sockets not available \n"); |
---|
148 | xilsock_rel_socket(sd); |
---|
149 | return -1; |
---|
150 | } |
---|
151 | xilsock_sockets[sd].conn.tcp_conn = (xilnet_tcp_conns + connd); |
---|
152 | // update fd of tcp conn |
---|
153 | xilnet_tcp_conns[connd].fd = sd; |
---|
154 | } |
---|
155 | else if (xilsock_sockets[sd].type == SOCK_DGRAM) { |
---|
156 | if ( (connd = xilnet_udp_open_conn (((struct sockaddr_in*)addr)->sin_port)) == -1) { |
---|
157 | print("bind: udp sockets not available \n"); |
---|
158 | xilsock_rel_socket(sd); |
---|
159 | return -1; |
---|
160 | } |
---|
161 | xilsock_sockets[sd].conn.udp_conn = (xilnet_udp_conns + connd); |
---|
162 | // update fd of udp conn |
---|
163 | xilnet_udp_conns[connd].fd = sd; |
---|
164 | } |
---|
165 | |
---|
166 | return 1; |
---|
167 | } |
---|
168 | |
---|
169 | |
---|
170 | /* |
---|
171 | * listen on a socket |
---|
172 | * called from listen() |
---|
173 | */ |
---|
174 | |
---|
175 | int xilsock_listen(int s, int backlog) { |
---|
176 | |
---|
177 | xilsock_sockets[s].listen = 1; |
---|
178 | return 1; |
---|
179 | |
---|
180 | } |
---|
181 | |
---|
182 | |
---|
183 | /* |
---|
184 | * accept a conn on the socket |
---|
185 | * if pkt for new conn, open new xilsock_socket, return 0 |
---|
186 | * if pkt for exisiting conn, return 0 |
---|
187 | */ |
---|
188 | |
---|
189 | int xilsock_accept(int sd, struct sockaddr* addr, int *addrlen) { |
---|
190 | |
---|
191 | int n = 0; |
---|
192 | int nsd; |
---|
193 | int ns; |
---|
194 | struct xilnet_tcp_conn* new_conn; |
---|
195 | struct xilnet_tcp_conn* curr_conn; |
---|
196 | int connd; |
---|
197 | unsigned char *buf = recvbuf; // recvbuf is the array to recv messages |
---|
198 | int len = LINK_FRAME_LEN; |
---|
199 | |
---|
200 | // reset status flag |
---|
201 | xilsock_status_flag = 0; |
---|
202 | |
---|
203 | // check for tcp conn to execute this call |
---|
204 | if (xilsock_sockets[sd].type != SOCK_STREAM) { |
---|
205 | print("accept: not a tcp socket \n"); |
---|
206 | return -1; |
---|
207 | } |
---|
208 | |
---|
209 | // call eth recv. if return val is 1, new conn |
---|
210 | // create new file, socket with same properties |
---|
211 | // else no new conn., return -1 |
---|
212 | |
---|
213 | n = xilnet_eth_recv_frame(buf, len); |
---|
214 | if (n < 0) // not for any of the supported conns |
---|
215 | return -1; |
---|
216 | |
---|
217 | if ( n == XILSOCK_NEW_CONN) { |
---|
218 | // create a new socket |
---|
219 | nsd = xilsock_socket(xilsock_sockets[sd].domain, xilsock_sockets[sd].type, xilsock_sockets[sd].proto); |
---|
220 | if (nsd < 0) { |
---|
221 | print("xilsock sockets not available \n"); |
---|
222 | return (-1); |
---|
223 | } |
---|
224 | if ( (connd = xilnet_tcp_open_conn (xilsock_sockets[sd].conn.tcp_conn->src_port)) == -1) { |
---|
225 | print("accept: tcp sockets not available \n"); |
---|
226 | xilsock_rel_socket(nsd); |
---|
227 | return -1; |
---|
228 | } |
---|
229 | // copy the orig socket characteristics to new socket |
---|
230 | xilsock_sockets[nsd].type = xilsock_sockets[sd].type; |
---|
231 | xilsock_sockets[nsd].domain = xilsock_sockets[sd].domain; |
---|
232 | xilsock_sockets[nsd].proto = xilsock_sockets[sd].proto; |
---|
233 | xilsock_sockets[nsd].connect = 1; |
---|
234 | new_conn = xilsock_sockets[nsd].conn.tcp_conn = (xilnet_tcp_conns + connd); |
---|
235 | curr_conn = xilsock_sockets[sd].conn.tcp_conn; |
---|
236 | |
---|
237 | // update new tcp conn which starts listening |
---|
238 | new_conn->fd = nsd; |
---|
239 | new_conn->dst_ip[0] = xilsock_sockets[sd].conn.tcp_conn->dst_ip[0]; |
---|
240 | new_conn->dst_ip[1] = xilsock_sockets[sd].conn.tcp_conn->dst_ip[1]; |
---|
241 | new_conn->dst_ip[2] = xilsock_sockets[sd].conn.tcp_conn->dst_ip[2]; |
---|
242 | new_conn->dst_ip[3] = xilsock_sockets[sd].conn.tcp_conn->dst_ip[3]; |
---|
243 | new_conn->dst_port = xilsock_sockets[sd].conn.tcp_conn->dst_port; |
---|
244 | new_conn->seqno = curr_conn->seqno; |
---|
245 | new_conn->ack_seqno = curr_conn->ack_seqno; |
---|
246 | new_conn->exp_acknum = curr_conn->exp_acknum; |
---|
247 | new_conn->state = curr_conn->state; |
---|
248 | |
---|
249 | // reset the listening connection |
---|
250 | curr_conn->state = TCP_LISTEN; |
---|
251 | curr_conn->dst_ip[0] = 0; |
---|
252 | curr_conn->dst_ip[1] = 0; |
---|
253 | curr_conn->dst_ip[2] = 0; |
---|
254 | curr_conn->dst_ip[3] = 0; |
---|
255 | curr_conn->dst_port = 0; |
---|
256 | curr_conn->seqno = 0; |
---|
257 | curr_conn->ack_seqno = 0; |
---|
258 | curr_conn->exp_acknum = 0; |
---|
259 | xilsock_sockets[sd].listen = 1; |
---|
260 | |
---|
261 | // send a reply using new socket |
---|
262 | memset(sendbuf, 0, LINK_FRAME_LEN); |
---|
263 | xilnet_tcp_send_pkt(new_conn, (sendbuf + LINK_HDR_LEN + (IP_HDR_LEN*4)), 0, (TCP_SYN|TCP_ACK)); |
---|
264 | xilnet_ip_header(sendbuf+LINK_HDR_LEN,(IP_HDR_LEN*4)+(TCP_HDR_LEN*4), IP_PROTO_TCP, new_conn->dst_ip); |
---|
265 | xilnet_eth_send_frame(sendbuf,LINK_HDR_LEN+(IP_HDR_LEN*4)+(TCP_HDR_LEN*4), new_conn->dst_ip, 0, ETH_PROTO_IP); |
---|
266 | new_conn->exp_acknum += 1; |
---|
267 | |
---|
268 | // set status flag |
---|
269 | xilsock_status_flag |= XILSOCK_NEW_CONN; |
---|
270 | return nsd; |
---|
271 | } |
---|
272 | else if (n == XILSOCK_CLOSE_CONN) { |
---|
273 | int i; |
---|
274 | for ( i = 0; i < NO_OF_XILSOCKS; i++) { |
---|
275 | if (xilsock_sockets[i].closed) { |
---|
276 | // close conn |
---|
277 | if (xilsock_sockets[i].type == SOCK_STREAM) |
---|
278 | xilnet_tcp_close_conn(xilsock_sockets[i].conn.tcp_conn); |
---|
279 | else if (xilsock_sockets[i].type == SOCK_DGRAM) |
---|
280 | xilnet_udp_close_conn(xilsock_sockets[i].conn.udp_conn); |
---|
281 | // close the socket |
---|
282 | xilsock_rel_socket(i); |
---|
283 | // set status flag |
---|
284 | xilsock_status_flag |= XILSOCK_CLOSE_CONN; |
---|
285 | return -1; |
---|
286 | } |
---|
287 | } |
---|
288 | } |
---|
289 | // set status flag |
---|
290 | xilsock_status_flag |= n; |
---|
291 | return n; |
---|
292 | } |
---|
293 | |
---|
294 | |
---|
295 | /* |
---|
296 | * recv data on socket |
---|
297 | * called from recv() |
---|
298 | * returns -1 if no data recvd for "s" (non_blocking call) or |
---|
299 | * number of bytes recvd for "s" |
---|
300 | */ |
---|
301 | |
---|
302 | int xilsock_recv(int s, unsigned char *buf, unsigned int len) { |
---|
303 | |
---|
304 | int n; |
---|
305 | int i; |
---|
306 | int bytes_recvd = 0; |
---|
307 | |
---|
308 | if (s > NO_OF_XILSOCKS) { |
---|
309 | print("recv: invalid socket descriptor \n"); |
---|
310 | return -1; |
---|
311 | } |
---|
312 | |
---|
313 | n = xilnet_eth_recv_frame(buf, len); |
---|
314 | |
---|
315 | // Return if data not for socket s |
---|
316 | if ((n < 0 ) || (xilsock_sockets[s].recvbuf.buf == NULL)) |
---|
317 | return -1; |
---|
318 | |
---|
319 | // Copy data if required onto buf |
---|
320 | if (xilsock_sockets[s].recvbuf.buf != buf) |
---|
321 | { |
---|
322 | memcpy(buf, xilsock_sockets[s].recvbuf.buf, len); |
---|
323 | bytes_recvd = xilsock_sockets[s].recvbuf.size; |
---|
324 | |
---|
325 | //reset socket buffer and size |
---|
326 | xilsock_sockets[s].recvbuf.buf = NULL; |
---|
327 | xilsock_sockets[s].recvbuf.size = 0; |
---|
328 | } |
---|
329 | |
---|
330 | |
---|
331 | // return no of bytes recvd for this conn |
---|
332 | //return xilsock_sockets[s].recvbuf.size; |
---|
333 | return bytes_recvd; |
---|
334 | |
---|
335 | } |
---|
336 | |
---|
337 | |
---|
338 | /* |
---|
339 | * send data on socket |
---|
340 | * called from send() |
---|
341 | */ |
---|
342 | |
---|
343 | int xilsock_send(int s, unsigned char* buf, unsigned int len) { |
---|
344 | |
---|
345 | struct xilnet_tcp_conn *conn; |
---|
346 | |
---|
347 | conn = xilsock_sockets[s].conn.tcp_conn; |
---|
348 | |
---|
349 | if (!conn) { |
---|
350 | print("send: no such socket \n"); |
---|
351 | return -1; |
---|
352 | } |
---|
353 | |
---|
354 | if (buf != sendbuf) { |
---|
355 | memset(sendbuf, 0, LINK_FRAME_LEN); |
---|
356 | memcpy(sendbuf+LINK_HDR_LEN+IP_HDR_LEN*4+(TCP_HDR_LEN*4), buf, len); |
---|
357 | } |
---|
358 | |
---|
359 | xilnet_tcp_send_pkt(conn, sendbuf+LINK_HDR_LEN+IP_HDR_LEN*4, len, TCP_ACK); |
---|
360 | xilnet_ip_header(sendbuf+LINK_HDR_LEN, len+(TCP_HDR_LEN*4)+IP_HDR_LEN*4, IP_PROTO_TCP, conn->dst_ip); |
---|
361 | |
---|
362 | xilnet_eth_send_frame(sendbuf, len+(TCP_HDR_LEN*4)+IP_HDR_LEN*4+ETH_HDR_LEN, conn->dst_ip, NULL, ETH_PROTO_IP); |
---|
363 | |
---|
364 | return len; |
---|
365 | |
---|
366 | } |
---|
367 | |
---|
368 | |
---|
369 | /* |
---|
370 | * recvfrom socket |
---|
371 | * Data recvd on any UDP socket |
---|
372 | * return -1 if data not for socket "s" [non-blocking call] |
---|
373 | */ |
---|
374 | int xilsock_recvfrom(int s, unsigned char *buf, unsigned int len, |
---|
375 | struct sockaddr* from, unsigned int *fromlen) |
---|
376 | { |
---|
377 | int n; |
---|
378 | int i; |
---|
379 | int bytes_recvd = 0; |
---|
380 | |
---|
381 | struct xilnet_udp_conn *conn = xilsock_sockets[s].conn.udp_conn; |
---|
382 | |
---|
383 | if (s > NO_OF_XILSOCKS) { |
---|
384 | print("recvfrom: invalid socket descriptor \n"); |
---|
385 | return -1; |
---|
386 | } |
---|
387 | |
---|
388 | n = xilnet_eth_recv_frame(buf, len); |
---|
389 | |
---|
390 | // Return if data not for socket s |
---|
391 | if ((n < 0 ) || (xilsock_sockets[s].recvbuf.buf == NULL)) |
---|
392 | return -1; |
---|
393 | |
---|
394 | // Copy data if required onto buf |
---|
395 | if (xilsock_sockets[s].recvbuf.buf != buf) |
---|
396 | { |
---|
397 | memcpy(buf, xilsock_sockets[s].recvbuf.buf, len); |
---|
398 | bytes_recvd = xilsock_sockets[s].recvbuf.size; |
---|
399 | |
---|
400 | //reset socket buffer and size |
---|
401 | xilsock_sockets[s].recvbuf.buf = NULL; |
---|
402 | xilsock_sockets[s].recvbuf.size = 0; |
---|
403 | } |
---|
404 | |
---|
405 | // Copy the source address onto "to" |
---|
406 | ((struct sockaddr_in*)from)->sin_addr.s_addr = |
---|
407 | (conn->dst_ip[0] << 24) + (conn->dst_ip[1] << 16) + (conn->dst_ip[2] << 8) + conn->dst_ip[3]; |
---|
408 | ((struct sockaddr_in*)from)->sin_port = conn->dst_port; |
---|
409 | *fromlen = sizeof(from); |
---|
410 | |
---|
411 | // return no of bytes recvd for this conn |
---|
412 | return bytes_recvd; |
---|
413 | |
---|
414 | } |
---|
415 | |
---|
416 | |
---|
417 | /* |
---|
418 | * sendto socket |
---|
419 | * called from sendto() |
---|
420 | */ |
---|
421 | |
---|
422 | int xilsock_sendto(int s, unsigned char* buf, unsigned int len, struct sockaddr* to, unsigned int tolen) |
---|
423 | { |
---|
424 | |
---|
425 | struct xilnet_udp_conn *conn; |
---|
426 | unsigned int dstaddr = ((struct sockaddr_in*)to)->sin_addr.s_addr; |
---|
427 | |
---|
428 | conn = xilsock_sockets[s].conn.udp_conn; |
---|
429 | conn->dst_ip[0] = (unsigned char) ((dstaddr >> 24) & 0xFF); |
---|
430 | conn->dst_ip[1] = (unsigned char) ((dstaddr >> 16) & 0xFF); |
---|
431 | conn->dst_ip[2] = (unsigned char) ((dstaddr >> 8) & 0xFF); |
---|
432 | conn->dst_ip[3] = (unsigned char) ((dstaddr) & 0xFF); |
---|
433 | conn->dst_port = ((struct sockaddr_in*)to)->sin_port; |
---|
434 | |
---|
435 | if (!conn) { |
---|
436 | print("sendto: no such socket \n"); |
---|
437 | return -1; |
---|
438 | } |
---|
439 | |
---|
440 | if (buf != sendbuf) { |
---|
441 | memset(sendbuf, 0, LINK_FRAME_LEN); |
---|
442 | memcpy(sendbuf+LINK_HDR_LEN+IP_HDR_LEN*4+UDP_HDR_LEN, buf, len); |
---|
443 | } |
---|
444 | |
---|
445 | // calls to udp stack |
---|
446 | xilnet_udp_header(conn, sendbuf+LINK_HDR_LEN+IP_HDR_LEN*4, len+UDP_HDR_LEN); |
---|
447 | xilnet_ip_header(sendbuf+LINK_HDR_LEN, len+UDP_HDR_LEN+IP_HDR_LEN*4, IP_PROTO_UDP, conn->dst_ip); |
---|
448 | |
---|
449 | xilnet_eth_send_frame(sendbuf, len+UDP_HDR_LEN+IP_HDR_LEN*4+ETH_HDR_LEN, conn->dst_ip, NULL, ETH_PROTO_IP); |
---|
450 | |
---|
451 | return len; |
---|
452 | } |
---|
453 | |
---|
454 | |
---|
455 | /* |
---|
456 | * close socket |
---|
457 | */ |
---|
458 | |
---|
459 | void xilsock_close(int s) { |
---|
460 | |
---|
461 | unsigned char flags = 0; |
---|
462 | unsigned short check = 0; |
---|
463 | unsigned char *tcp_reply; |
---|
464 | |
---|
465 | if (xilsock_sockets[s].type == SOCK_STREAM) { |
---|
466 | struct xilnet_tcp_conn *conn = xilsock_sockets[s].conn.tcp_conn; |
---|
467 | |
---|
468 | // construct the FIN and wait for ack & FIN from client |
---|
469 | flags = (TCP_FIN | TCP_ACK); |
---|
470 | ((struct xilnet_tcp_conn*)conn)->state = TCP_FIN_WAIT1; |
---|
471 | memset(sendbuf, 0, LINK_FRAME_LEN); |
---|
472 | tcp_reply = sendbuf+ETH_HDR_LEN+(IP_HDR_LEN*4); |
---|
473 | |
---|
474 | xilnet_tcp_header(((struct xilnet_tcp_conn*)conn), tcp_reply, 1, flags); |
---|
475 | |
---|
476 | // calculate tcp checksum |
---|
477 | check = xilnet_udp_tcp_calc_chksum(tcp_reply, (TCP_HDR_LEN*4), mb_ip_addr, ((struct xilnet_tcp_conn*)conn)->dst_ip, IP_PROTO_TCP); |
---|
478 | tcp_reply[TCP_CHECK_OFF] = (check & 0xff00) >> 8; |
---|
479 | tcp_reply[TCP_CHECK_OFF+1] = (check & 0x00ff); |
---|
480 | |
---|
481 | xilnet_ip_header(sendbuf+ETH_HDR_LEN,(IP_HDR_LEN*4)+(TCP_HDR_LEN*4), IP_PROTO_TCP, ((struct xilnet_tcp_conn*)conn)->dst_ip); |
---|
482 | xilnet_eth_send_frame(sendbuf, (TCP_HDR_LEN*4)+(IP_HDR_LEN*4)+ETH_HDR_LEN, ((struct xilnet_tcp_conn*)conn)->dst_ip, NULL, ETH_PROTO_IP); |
---|
483 | |
---|
484 | |
---|
485 | } |
---|
486 | else if (xilsock_sockets[s].type == SOCK_DGRAM) { |
---|
487 | xilnet_udp_close_conn(xilsock_sockets[s].conn.udp_conn); |
---|
488 | // close the socket |
---|
489 | xilsock_rel_socket(s); |
---|
490 | } |
---|
491 | |
---|
492 | } |
---|