2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1993
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34 static char sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95";
36 static const char rcsid[] =
40 #include <sys/param.h>
42 #include <sys/socket.h>
45 #include <ufs/ufs/dinode.h>
47 #include <netinet/in.h>
48 #include <netinet/in_systm.h>
49 #include <netinet/ip.h>
50 #include <netinet/tcp.h>
52 #include <protocols/dumprestore.h>
64 #include "pathnames.h"
70 static int rmtstate = TS_CLOSED;
74 static int okname(const char *);
75 static int rmtcall(const char *, const char *);
76 static void rmtconnaborted(int);
77 static int rmtgetb(void);
78 static void rmtgetconn(void);
79 static void rmtgets(char *, int);
80 static int rmtreply(const char *);
82 static int errfd = -1;
85 rmthost(const char *host)
88 rmtpeer = strdup(host);
91 signal(SIGPIPE, rmtconnaborted);
99 rmtconnaborted(int sig __unused)
101 msg("Lost connection to remote host.\n");
110 if (select(errfd + 1, &r, NULL, NULL, &t)) {
114 if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) {
116 msg("on %s: %s%s", rmtpeer, buf,
117 buf[i - 1] == '\n' ? "" : "\n");
130 static struct servent *sp = NULL;
131 static struct passwd *pwd = NULL;
138 sp = getservbyname("shell", "tcp");
140 msg("shell/tcp: unknown service\n");
143 pwd = getpwuid(getuid());
145 msg("who are you?\n");
149 if ((cp = strchr(rmtpeer, '@')) != NULL) {
156 tuser = pwd->pw_name;
157 if ((rmt = getenv("RMT")) == NULL)
160 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name,
163 msg("login to %s as %s failed.\n", rmtpeer, tuser);
166 (void)fprintf(stderr, "Connection to %s established.\n", rmtpeer);
167 size = ntrec * TP_BSIZE;
168 if (size > 60 * 1024) /* XXX */
170 /* Leave some space for rmt request/response protocol */
172 while (size > TP_BSIZE &&
173 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
175 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
176 throughput = IPTOS_THROUGHPUT;
177 if (setsockopt(rmtape, IPPROTO_IP, IP_TOS,
178 &throughput, sizeof(throughput)) < 0)
179 perror("IP_TOS:IPTOS_THROUGHPUT setsockopt");
181 if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
182 perror("TCP_NODELAY setsockopt");
186 okname(const char *cp0)
191 for (cp = cp0; *cp; cp++) {
193 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
194 msg("invalid user name %s\n", cp0);
202 rmtopen(const char *tape, int mode)
206 (void)snprintf(buf, sizeof (buf), "O%.226s\n%d\n", tape, mode);
208 return (rmtcall(tape, buf));
215 if (rmtstate != TS_OPEN)
217 rmtcall("close", "C\n");
218 rmtstate = TS_CLOSED;
222 rmtread(char *buf, int count)
227 (void)snprintf(line, sizeof (line), "R%d\n", count);
228 n = rmtcall("read", line);
230 /* rmtcall() properly sets errno for us on errors. */
232 for (i = 0; i < n; i += cc) {
233 cc = read(rmtape, buf+i, n - i);
241 rmtwrite(const char *buf, int count)
245 (void)snprintf(line, sizeof (line), "W%d\n", count);
246 write(rmtape, line, strlen(line));
247 write(rmtape, buf, count);
248 return (rmtreply("write"));
256 (void)snprintf(line, sizeof (line), "W%d\n", count);
257 write(rmtape, line, strlen(line));
261 rmtwrite1(const char *buf, int count)
264 write(rmtape, buf, count);
271 return (rmtreply("write"));
275 rmtseek(int offset, int pos) /* XXX off_t ? */
279 (void)snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos);
280 return (rmtcall("seek", line));
291 if (rmtstate != TS_OPEN)
293 rmtcall("status", "S\n");
294 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
300 rmtioctl(int cmd, int count)
306 (void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count);
307 return (rmtcall("ioctl", buf));
311 rmtcall(const char *cmd, const char *buf)
314 if (write(rmtape, buf, strlen(buf)) != strlen(buf))
316 return (rmtreply(cmd));
320 rmtreply(const char *cmd)
323 char code[30], emsg[BUFSIZ];
325 rmtgets(code, sizeof (code));
326 if (*code == 'E' || *code == 'F') {
327 rmtgets(emsg, sizeof (emsg));
328 msg("%s: %s", cmd, emsg);
329 errno = atoi(code + 1);
331 rmtstate = TS_CLOSED;
335 /* Kill trailing newline */
336 cp = code + strlen(code);
337 if (cp > code && *--cp == '\n')
340 msg("Protocol to remote tape server botched (code \"%s\").\n",
344 return (atoi(code + 1));
352 if (read(rmtape, &c, 1) != 1)
357 /* Get a line (guaranteed to have a trailing newline). */
359 rmtgets(char *line, int len)
373 msg("Protocol to remote tape server botched.\n");
374 msg("(rmtgets got \"%s\").\n", line);