2 * Copyright (C) 2005-2011 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief Protocol stuff for lpp server
23 * @author Sebastian Hack
33 #define WIN32_LEAN_AND_MEAN
38 #include <sys/types.h>
39 #include <sys/socket.h>
40 #include <arpa/inet.h>
58 static inline firm_dbg_module_t *get_dbg_module(void)
60 static firm_dbg_module_t *dbg = NULL;
62 dbg = firm_dbg_register("lpp.comm");
68 #define dbg get_dbg_module()
71 * Try to read some bytes but block until a certain amount is read.
72 * @param fd The file descriptor.
73 * @param buf The buffer to read into.
74 * @param try_amount The amount of bytes to try to read.
75 * @param at_least block until this many bytes are read.
76 * @return The number of bytes read or -1 on error.
78 static ssize_t secure_recv(int fd, void *buf, size_t try_amount, size_t at_least)
81 size_t bytes_read = 0;
85 res = recv(fd, &data[bytes_read], try_amount - bytes_read, 0);
87 if(res == 0 || errno != EAGAIN)
94 } while(bytes_read < at_least);
99 static ssize_t secure_send(int fd, const void *buf, size_t n)
102 size_t bytes_written = 0;
103 const char *data = buf;
106 res = send(fd, &data[bytes_written], n - bytes_written, 0);
113 bytes_written += res;
115 } while(bytes_written < n);
120 ssize_t lpp_flush(lpp_comm_t *comm)
123 if(comm->w_pos - comm->w_buf > 0) {
124 DBG((dbg, LEVEL_1, "flushing %d bytes\n", comm->w_pos - comm->w_buf));
125 res = secure_send(comm->fd, comm->w_buf, comm->w_pos - comm->w_buf);
129 comm->w_pos = comm->w_buf;
134 static ssize_t lpp_write(lpp_comm_t *comm, const void *buf, size_t len)
136 assert(comm->w_pos - comm->w_buf >= 0);
138 DBG((dbg, LEVEL_1, "write of length %d\n", len));
140 size_t free = (comm->w_buf + comm->buf_size) - comm->w_pos;
141 size_t copy = MIN(free, len);
142 size_t rest = len - copy;
143 const char *pos = buf;
145 DBG((dbg, LEVEL_1, "\tfree = %d, copy = %d, rest = %d\n", free, copy, rest));
147 memcpy(comm->w_pos, pos, copy);
153 * Not everything in buf fits into the buffer,
154 * so flush the buffer and write the rest.
158 size_t n_direct = rest / comm->buf_size;
161 if(lpp_flush(comm) < 0)
164 for(i = 0; i < n_direct; ++i) {
165 if(secure_send(comm->fd, pos, comm->buf_size) < 0)
168 pos += comm->buf_size;
171 last_rest = ((const char *) buf + len) - pos;
174 assert(last_rest < comm->buf_size);
175 assert(comm->w_pos == comm->w_buf);
176 memcpy(comm->w_pos, pos, last_rest);
177 comm->w_pos += last_rest;
185 static ssize_t lpp_read(lpp_comm_t *comm, void *buf, size_t len)
187 DBG((dbg, LEVEL_1, "read of length %d\n", len));
189 size_t left = comm->r_max - comm->r_pos;
190 size_t copy = MIN(left, len);
191 size_t rest = len - copy;
194 DBG((dbg, LEVEL_1, "\tleft = %d, copy = %d, rest = %d\n", left, copy, rest));
196 memcpy(pos, comm->r_pos, copy);
201 /* We want to read more than the buffer can provide. */
203 size_t bs = comm->buf_size;
204 size_t n_direct = rest / comm->buf_size;
209 * The buffer is now completely read, so
210 * reset the pointers.
212 comm->r_pos = comm->r_buf;
213 comm->r_max = comm->r_buf;
215 for(i = 0; i < n_direct; ++i) {
216 if(secure_recv(comm->fd, pos, bs, bs) < 0)
219 pos += comm->buf_size;
222 last_rest = ((const char *) buf + len) - pos;
225 ssize_t bytes_read = 0;
227 assert(last_rest < comm->buf_size);
228 assert(comm->r_pos == comm->r_buf);
230 bytes_read = secure_recv(comm->fd, comm->r_buf, bs, last_rest);
234 memcpy(pos, comm->r_buf, last_rest);
235 comm->r_pos = comm->r_buf + last_rest;
236 comm->r_max = comm->r_buf + bytes_read;
244 lpp_comm_t *lpp_comm_new(int fd, size_t buf_size)
246 lpp_comm_t *res = malloc(sizeof(res[0]));
249 res->w_buf = malloc(buf_size);
250 res->w_pos = res->w_buf;
251 res->r_buf = malloc(buf_size);
252 res->r_pos = res->r_buf;
253 res->r_max = res->r_buf;
254 res->buf_size = buf_size;
259 int lpp_comm_fileno(const lpp_comm_t *comm)
264 void lpp_comm_free(lpp_comm_t *comm)
271 void lpp_print_err(const char *fmt, ...)
276 vfprintf(stderr, fmt, args);
280 void lpp_writel(lpp_comm_t *comm, uint32_t x)
283 ERRNO_CHECK(lpp_write(comm, &x, sizeof(x)), !=, (ssize_t)sizeof(x));
286 void lpp_writed(lpp_comm_t *comm, double dbl)
288 ERRNO_CHECK(lpp_write(comm, &dbl, sizeof(dbl)), !=, (ssize_t)sizeof(dbl));
291 void lpp_writes(lpp_comm_t *comm, const char *str)
293 size_t n = strlen(str);
295 ERRNO_CHECK(lpp_write(comm, str, n), !=, (ssize_t) n);
298 uint32_t lpp_readl(lpp_comm_t *comm)
302 ERRNO_CHECK(lpp_read(comm, &res, sizeof(res)), !=, (ssize_t)sizeof(res));
306 int lpp_read_cmd(lpp_comm_t *comm)
312 retval = recv(comm->fd, (char *)&res, sizeof(res), 0);
322 return (int) ntohl(res);
325 double lpp_readd(lpp_comm_t *comm)
328 ERRNO_CHECK(lpp_read(comm, &res, sizeof(res)), !=, (ssize_t)sizeof(res));
332 char *lpp_reads(lpp_comm_t *comm)
334 size_t len = lpp_readl(comm);
335 char *res = malloc(sizeof(char) * (len + 1));
337 ERRNO_CHECK(lpp_read(comm, res, len), !=, (ssize_t) len);
342 char *lpp_readbuf(lpp_comm_t *comm, char *buf, size_t buflen)
346 size_t n = buflen - 1;
347 size_t len = lpp_readl(comm);
348 size_t max_read = n < len ? n : len;
349 size_t rest = len - max_read;
351 if(buflen > 0 && buf != NULL) {
352 ERRNO_CHECK(lpp_read(comm, buf, max_read), !=, (ssize_t) max_read);
353 buf[max_read] = '\0';
358 /* eat up data that didnt fit into the string */
359 for(i = 0, n = rest / sizeof(dummy); i < n; ++i)
360 ERRNO_CHECK(lpp_read(comm, dummy, sizeof(dummy)), !=, (ssize_t)sizeof(dummy));
362 if(rest % sizeof(dummy) > 0)
363 ERRNO_CHECK(lpp_read(comm, dummy, rest % sizeof(dummy)), !=,
364 (ssize_t) (rest % sizeof(dummy)) );
369 int lpp_ack(lpp_comm_t *comm, char *buf, size_t buflen)
372 int cmd = lpp_readl(comm);
379 lpp_readbuf(comm, buf, buflen);
387 void lpp_send_res(lpp_comm_t *comm, int ok, const char *fmt, ...)
394 vsnprintf(buf, sizeof(buf), fmt, args);
397 lpp_writel(comm, LPP_CMD_BAD);
398 lpp_writes(comm, buf);
400 lpp_writel(comm, LPP_CMD_OK);
404 void lpp_send_ack(lpp_comm_t *comm)
406 lpp_send_res(comm, 1, "");
409 const char *lpp_get_cmd_name(int cmd)
412 case LPP_CMD_BAD: return "BAD";
413 case LPP_CMD_OK: return "OK";
414 case LPP_CMD_PROBLEM: return "PROBLEM";
415 case LPP_CMD_SOLUTION: return "SOLUTION";
416 case LPP_CMD_SOLVER: return "SOLVER";
417 case LPP_CMD_BYE: return "BYE";
418 case LPP_CMD_SOLVERS: return "SOLVERS";
419 case LPP_CMD_SET_DEBUG: return "SET_DEBUG";
420 case LPP_CMD_INFO: return "INFO";