1 /*
2 * System-dependent procedures for pppd under Solaris 2.
3 *
4 * Parts re-written by Adi Masputra <adi.masputra@sun.com>, based on
5 * the original sys-svr4.c
6 *
7 * Copyright (c) 2000 by Sun Microsystems, Inc.
8 * All rights reserved.
9 *
10 * Permission to use, copy, modify, and distribute this software and its
11 * documentation is hereby granted, provided that the above copyright
12 * notice appears in all copies.
13 *
14 * SUN MAKES NO REPRESENTATION OR WARRANTIES ABOUT THE SUITABILITY OF
15 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
16 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
17 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
18 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
19 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES
20 *
21 * Copyright (c) 1995-2002 Paul Mackerras. All rights reserved.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 *
27 * 1. Redistributions of source code must retain the above copyright
28 * notice, this list of conditions and the following disclaimer.
29 *
30 * 2. The name(s) of the authors of this software must not be used to
31 * endorse or promote products derived from this software without
32 * prior written permission.
33 *
34 * 3. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by Paul Mackerras
37 * <paulus@samba.org>".
38 *
39 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
40 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
41 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
42 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
43 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
44 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
45 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
46 *
47 * Derived from main.c and pppd.h, which are:
48 *
49 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
50 *
51 * Redistribution and use in source and binary forms, with or without
52 * modification, are permitted provided that the following conditions
53 * are met:
54 *
55 * 1. Redistributions of source code must retain the above copyright
56 * notice, this list of conditions and the following disclaimer.
57 *
58 * 2. Redistributions in binary form must reproduce the above copyright
59 * notice, this list of conditions and the following disclaimer in
60 * the documentation and/or other materials provided with the
61 * distribution.
62 *
63 * 3. The name "Carnegie Mellon University" must not be used to
64 * endorse or promote products derived from this software without
65 * prior written permission. For permission or any legal
66 * details, please contact
67 * Office of Technology Transfer
68 * Carnegie Mellon University
69 * 5000 Forbes Avenue
70 * Pittsburgh, PA 15213-3890
71 * (412) 268-4387, fax: (412) 268-7395
72 * tech-transfer@andrew.cmu.edu
73 *
74 * 4. Redistributions of any form whatsoever must retain the following
75 * acknowledgment:
76 * "This product includes software developed by Computing Services
77 * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
78 *
79 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
80 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
81 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
82 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
83 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
84 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
85 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
86 */
87
88 #define RCSID "$Id: sys-solaris.c,v 1.16 2008/01/30 14:26:53 carlsonj Exp $"
89
90 #include <limits.h>
91 #include <stdio.h>
92 #include <stddef.h>
93 #include <stdlib.h>
94 #include <string.h>
95 #include <ctype.h>
96 #include <errno.h>
97 #include <fcntl.h>
98 #include <unistd.h>
99 #include <termios.h>
100 #ifndef CRTSCTS
101 #include <sys/termiox.h>
102 #endif
103 #include <signal.h>
104 #include <utmpx.h>
105 #include <stropts.h>
106 #include <sys/types.h>
107 #include <sys/ioccom.h>
108 #include <sys/stream.h>
109 #include <sys/stropts.h>
110 #include <sys/socket.h>
111 #include <sys/sockio.h>
112 #include <sys/sysmacros.h>
113 #include <sys/systeminfo.h>
114 #include <sys/dlpi.h>
115 #include <sys/stat.h>
116 #include <sys/mkdev.h>
117 #include <net/if.h>
118 #include <net/if_arp.h>
119 #include <net/route.h>
120 #include <net/ppp_defs.h>
121 #include <net/pppio.h>
122 #include <netinet/in.h>
123 #ifdef SOL2
124 #include <sys/tihdr.h>
125 #include <sys/tiuser.h>
126 #include <inet/common.h>
127 #include <inet/mib2.h>
128 #include <sys/ethernet.h>
129 #endif
130
131 #include "pppd.h"
132 #include "fsm.h"
133 #include "lcp.h"
134 #include "ipcp.h"
135 #include "ccp.h"
136
137 #if !defined(PPP_DRV_NAME)
138 #define PPP_DRV_NAME "ppp"
139 #endif /* !defined(PPP_DRV_NAME) */
140
141 #if !defined(PPP_DEV_NAME)
142 #define PPP_DEV_NAME "/dev/" PPP_DRV_NAME
143 #endif /* !defined(PPP_DEV_NAME) */
144
145 #if !defined(AHDLC_MOD_NAME)
146 #define AHDLC_MOD_NAME "ppp_ahdl"
147 #endif /* !defined(AHDLC_MOD_NAME) */
148
149 #if !defined(COMP_MOD_NAME)
150 #define COMP_MOD_NAME "ppp_comp"
151 #endif /* !defined(COMP_MOD_NAME) */
152
153 #if !defined(IP_DEV_NAME)
154 #define IP_DEV_NAME "/dev/ip"
155 #endif /* !defined(IP_DEV_NAME) */
156
157 #if !defined(IP_MOD_NAME)
158 #define IP_MOD_NAME "ip"
159 #endif /* !defined(IP_MOD_NAME) */
160
161 #if !defined(UDP_DEV_NAME) && defined(SOL2)
162 #define UDP_DEV_NAME "/dev/udp"
163 #endif /* !defined(UDP_DEV_NAME) && defined(SOL2) */
164
165 #if !defined(UDP6_DEV_NAME) && defined(SOL2)
166 #define UDP6_DEV_NAME "/dev/udp6"
167 #endif /* !defined(UDP6_DEV_NAME) && defined(SOL2) */
168
169 static const char rcsid[] = RCSID;
170
171 #if defined(SOL2)
172 /*
173 * "/dev/udp" is used as a multiplexor to PLINK the interface stream
174 * under. It is used in place of "/dev/ip" since STREAMS will not let
175 * a driver be PLINK'ed under itself, and "/dev/ip" is typically the
176 * driver at the bottom of the tunneling interfaces stream.
177 */
178 static char *mux_dev_name = UDP_DEV_NAME;
179 #else
180 static char *mux_dev_name = IP_DEV_NAME;
181 #endif
182 static int pppfd;
183 static int fdmuxid = -1;
184 static int ipfd;
185 static int ipmuxid = -1;
186
187 #if defined(INET6) && defined(SOL2)
188 static int ip6fd; /* IP file descriptor */
189 static int ip6muxid = -1; /* Multiplexer file descriptor */
190 static int if6_is_up = 0; /* IPv6 interface has been marked up */
191
192 #define _IN6_LLX_FROM_EUI64(l, s, eui64, as) do { \
193 s->sin6_addr.s6_addr32[0] = htonl(as); \
194 eui64_copy(eui64, s->sin6_addr.s6_addr32[2]); \
195 s->sin6_family = AF_INET6; \
196 l.lifr_addr.ss_family = AF_INET6; \
197 l.lifr_addrlen = 64; \
198 l.lifr_addr = laddr; \
199 } while (0)
200
201 #define IN6_LLADDR_FROM_EUI64(l, s, eui64) \
202 _IN6_LLX_FROM_EUI64(l, s, eui64, 0xfe800000)
203
204 #define IN6_LLTOKEN_FROM_EUI64(l, s, eui64) \
205 _IN6_LLX_FROM_EUI64(l, s, eui64, 0)
206
207 #endif /* defined(INET6) && defined(SOL2) */
208
209 #if defined(INET6) && defined(SOL2)
210 static char first_ether_name[LIFNAMSIZ]; /* Solaris 8 and above */
211 #else
212 static char first_ether_name[IFNAMSIZ]; /* Before Solaris 8 */
213 #define MAXIFS 256 /* Max # of interfaces */
214 #endif /* defined(INET6) && defined(SOL2) */
215
216 static int restore_term;
217 static struct termios inittermios;
218 #ifndef CRTSCTS
219 static struct termiox inittermiox;
220 static int termiox_ok;
221 #endif
222 static struct winsize wsinfo; /* Initial window size info */
223 static pid_t tty_sid; /* original session ID for terminal */
224
225 extern u_char inpacket_buf[]; /* borrowed from main.c */
226
227 #define MAX_POLLFDS 32
228 static struct pollfd pollfds[MAX_POLLFDS];
229 static int n_pollfds;
230
231 static int link_mtu, link_mru;
232
233 #define NMODULES 32
234 static int tty_nmodules;
235 static char tty_modules[NMODULES][FMNAMESZ+1];
236 static int tty_npushed;
237
238 static int if_is_up; /* Interface has been marked up */
239 static u_int32_t remote_addr; /* IP address of peer */
240 static u_int32_t default_route_gateway; /* Gateway for default route added */
241 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
242
243 /* Prototypes for procedures local to this file. */
244 static int translate_speed __P((int));
245 static int baud_rate_of __P((int));
246 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
247 static int get_hw_addr __P((char *, u_int32_t, struct sockaddr *));
248 static int get_hw_addr_dlpi __P((char *, struct sockaddr *));
249 static int dlpi_attach __P((int, int));
250 static int dlpi_info_req __P((int));
251 static int dlpi_get_reply __P((int, union DL_primitives *, int, int));
252 static int strioctl __P((int, int, void *, int, int));
253
254 #ifdef SOL2
255 /*
256 * sifppa - Sets interface ppa
257 *
258 * without setting the ppa, ip module will return EINVAL upon setting the
259 * interface UP (SIOCSxIFFLAGS). This is because ip module in 2.8 expects
260 * two DLPI_INFO_REQ to be sent down to the driver (below ip) before
261 * IFF_UP can be set. Plumbing the device causes one DLPI_INFO_REQ to
262 * be sent down, and the second DLPI_INFO_REQ is sent upon receiving
263 * IF_UNITSEL (old) or SIOCSLIFNAME (new) ioctls. Such setting of the ppa
264 * is required because the ppp DLPI provider advertises itself as
265 * a DLPI style 2 type, which requires a point of attachment to be
266 * specified. The only way the user can specify a point of attachment
267 * is via SIOCSLIFNAME or IF_UNITSEL.
268 *
269 * Such changes in the behavior of ip module was made to meet new or
270 * evolving standards requirements.
271 *
272 */
273 static int
sifppa(fd,ppa)274 sifppa(fd, ppa)
275 int fd;
276 int ppa;
277 {
278 return (int)ioctl(fd, IF_UNITSEL, (char *)&ppa);
279 }
280 #endif /* SOL2 */
281
282 #if defined(SOL2) && defined(INET6)
283 /*
284 * get_first_ethernet - returns the first Ethernet interface name found in
285 * the system, or NULL if none is found
286 *
287 * NOTE: This is the lifreq version (Solaris 8 and above)
288 */
289 char *
get_first_ethernet()290 get_first_ethernet()
291 {
292 struct lifnum lifn;
293 struct lifconf lifc;
294 struct lifreq *plifreq;
295 struct lifreq lifr;
296 int fd, num_ifs, i, found;
297 uint_t fl, req_size;
298 char *req;
299
300 fd = socket(AF_INET, SOCK_DGRAM, 0);
301 if (fd < 0) {
302 return 0;
303 }
304
305 /*
306 * Find out how many interfaces are running
307 */
308 lifn.lifn_family = AF_UNSPEC;
309 lifn.lifn_flags = LIFC_NOXMIT;
310 if (ioctl(fd, SIOCGLIFNUM, &lifn) < 0) {
311 close(fd);
312 error("could not determine number of interfaces: %m");
313 return 0;
314 }
315
316 num_ifs = lifn.lifn_count;
317 req_size = num_ifs * sizeof(struct lifreq);
318 req = malloc(req_size);
319 if (req == NULL) {
320 close(fd);
321 error("out of memory");
322 return 0;
323 }
324
325 /*
326 * Get interface configuration info for all interfaces
327 */
328 lifc.lifc_family = AF_UNSPEC;
329 lifc.lifc_flags = LIFC_NOXMIT;
330 lifc.lifc_len = req_size;
331 lifc.lifc_buf = req;
332 if (ioctl(fd, SIOCGLIFCONF, &lifc) < 0) {
333 close(fd);
334 free(req);
335 error("SIOCGLIFCONF: %m");
336 return 0;
337 }
338
339 /*
340 * And traverse each interface to look specifically for the first
341 * occurence of an Ethernet interface which has been marked up
342 */
343 plifreq = lifc.lifc_req;
344 found = 0;
345 for (i = lifc.lifc_len / sizeof(struct lifreq); i > 0; i--, plifreq++) {
346
347 if (strchr(plifreq->lifr_name, ':') != NULL)
348 continue;
349
350 memset(&lifr, 0, sizeof(lifr));
351 strncpy(lifr.lifr_name, plifreq->lifr_name, sizeof(lifr.lifr_name));
352 if (ioctl(fd, SIOCGLIFFLAGS, &lifr) < 0) {
353 close(fd);
354 free(req);
355 error("SIOCGLIFFLAGS: %m");
356 return 0;
357 }
358 fl = lifr.lifr_flags;
359
360 if ((fl & (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
361 != (IFF_UP | IFF_BROADCAST))
362 continue;
363
364 found = 1;
365 break;
366 }
367 free(req);
368 close(fd);
369
370 if (found) {
371 strncpy(first_ether_name, lifr.lifr_name, sizeof(first_ether_name));
372 return (char *)first_ether_name;
373 } else
374 return NULL;
375 }
376 #else
377 /*
378 * get_first_ethernet - returns the first Ethernet interface name found in
379 * the system, or NULL if none is found
380 *
381 * NOTE: This is the ifreq version (before Solaris 8).
382 */
383 char *
get_first_ethernet()384 get_first_ethernet()
385 {
386 struct ifconf ifc;
387 struct ifreq *pifreq;
388 struct ifreq ifr;
389 int fd, num_ifs, i, found;
390 uint_t fl, req_size;
391 char *req;
392
393 fd = socket(AF_INET, SOCK_DGRAM, 0);
394 if (fd < 0) {
395 return 0;
396 }
397
398 /*
399 * Find out how many interfaces are running
400 */
401 if (ioctl(fd, SIOCGIFNUM, (char *)&num_ifs) < 0) {
402 num_ifs = MAXIFS;
403 }
404
405 req_size = num_ifs * sizeof(struct ifreq);
406 req = malloc(req_size);
407 if (req == NULL) {
408 close(fd);
409 error("out of memory");
410 return 0;
411 }
412
413 /*
414 * Get interface configuration info for all interfaces
415 */
416 ifc.ifc_len = req_size;
417 ifc.ifc_buf = req;
418 if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
419 close(fd);
420 free(req);
421 error("SIOCGIFCONF: %m");
422 return 0;
423 }
424
425 /*
426 * And traverse each interface to look specifically for the first
427 * occurence of an Ethernet interface which has been marked up
428 */
429 pifreq = ifc.ifc_req;
430 found = 0;
431 for (i = ifc.ifc_len / sizeof(struct ifreq); i > 0; i--, pifreq++) {
432
433 if (strchr(pifreq->ifr_name, ':') != NULL)
434 continue;
435
436 memset(&ifr, 0, sizeof(ifr));
437 strncpy(ifr.ifr_name, pifreq->ifr_name, sizeof(ifr.ifr_name));
438 if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
439 close(fd);
440 free(req);
441 error("SIOCGIFFLAGS: %m");
442 return 0;
443 }
444 fl = ifr.ifr_flags;
445
446 if ((fl & (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
447 != (IFF_UP | IFF_BROADCAST))
448 continue;
449
450 found = 1;
451 break;
452 }
453 free(req);
454 close(fd);
455
456 if (found) {
457 strncpy(first_ether_name, ifr.ifr_name, sizeof(first_ether_name));
458 return (char *)first_ether_name;
459 } else
460 return NULL;
461 }
462 #endif /* defined(SOL2) && defined(INET6) */
463
464 #if defined(SOL2)
465 /*
466 * get_if_hwaddr - get the hardware address for the specified
467 * network interface device.
468 */
469 int
get_if_hwaddr(u_char * addr,char * if_name)470 get_if_hwaddr(u_char *addr, char *if_name)
471 {
472 struct sockaddr s_eth_addr;
473 struct ether_addr *eth_addr = (struct ether_addr *)&s_eth_addr.sa_data;
474
475 if (if_name == NULL)
476 return -1;
477
478 /*
479 * Send DL_INFO_REQ to the driver to solicit its MAC address
480 */
481 if (!get_hw_addr_dlpi(if_name, &s_eth_addr)) {
482 error("could not obtain hardware address for %s", if_name);
483 return -1;
484 }
485
486 memcpy(addr, eth_addr->ether_addr_octet, 6);
487 return 1;
488 }
489 #endif /* SOL2 */
490
491 #if defined(SOL2) && defined(INET6)
492 /*
493 * slifname - Sets interface ppa and flags
494 *
495 * in addition to the comments stated in sifppa(), IFF_IPV6 bit must
496 * be set in order to declare this as an IPv6 interface
497 */
498 static int
slifname(fd,ppa)499 slifname(fd, ppa)
500 int fd;
501 int ppa;
502 {
503 struct lifreq lifr;
504 int ret;
505
506 memset(&lifr, 0, sizeof(lifr));
507 ret = ioctl(fd, SIOCGLIFFLAGS, &lifr);
508 if (ret < 0)
509 goto slifname_done;
510
511 lifr.lifr_flags |= IFF_IPV6;
512 lifr.lifr_flags &= ~(IFF_BROADCAST | IFF_IPV4);
513 lifr.lifr_ppa = ppa;
514 strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
515
516 ret = ioctl(fd, SIOCSLIFNAME, &lifr);
517
518 slifname_done:
519 return ret;
520
521
522 }
523
524
525 /*
526 * ether_to_eui64 - Convert 48-bit Ethernet address into 64-bit EUI
527 *
528 * walks the list of valid ethernet interfaces, and convert the first
529 * found 48-bit MAC address into EUI 64. caller also assumes that
530 * the system has a properly configured Ethernet interface for this
531 * function to return non-zero.
532 */
533 int
ether_to_eui64(eui64_t * p_eui64)534 ether_to_eui64(eui64_t *p_eui64)
535 {
536 struct sockaddr s_eth_addr;
537 struct ether_addr *eth_addr = (struct ether_addr *)&s_eth_addr.sa_data;
538 char *if_name;
539
540 if ((if_name = get_first_ethernet()) == NULL) {
541 error("no persistent id can be found");
542 return 0;
543 }
544
545 /*
546 * Send DL_INFO_REQ to the driver to solicit its MAC address
547 */
548 if (!get_hw_addr_dlpi(if_name, &s_eth_addr)) {
549 error("could not obtain hardware address for %s", if_name);
550 return 0;
551 }
552
553 /*
554 * And convert the EUI-48 into EUI-64, per RFC 2472 [sec 4.1]
555 */
556 p_eui64->e8[0] = (eth_addr->ether_addr_octet[0] & 0xFF) | 0x02;
557 p_eui64->e8[1] = (eth_addr->ether_addr_octet[1] & 0xFF);
558 p_eui64->e8[2] = (eth_addr->ether_addr_octet[2] & 0xFF);
559 p_eui64->e8[3] = 0xFF;
560 p_eui64->e8[4] = 0xFE;
561 p_eui64->e8[5] = (eth_addr->ether_addr_octet[3] & 0xFF);
562 p_eui64->e8[6] = (eth_addr->ether_addr_octet[4] & 0xFF);
563 p_eui64->e8[7] = (eth_addr->ether_addr_octet[5] & 0xFF);
564
565 return 1;
566 }
567 #endif /* defined(SOL2) && defined(INET6) */
568
569 /*
570 * sys_init - System-dependent initialization.
571 */
572 void
sys_init()573 sys_init()
574 {
575 int ifd, x;
576 struct ifreq ifr;
577 #if defined(INET6) && defined(SOL2)
578 int i6fd;
579 struct lifreq lifr;
580 #endif /* defined(INET6) && defined(SOL2) */
581 #if !defined(SOL2)
582 struct {
583 union DL_primitives prim;
584 char space[64];
585 } reply;
586 #endif /* !defined(SOL2) */
587
588 ipfd = open(mux_dev_name, O_RDWR, 0);
589 if (ipfd < 0)
590 fatal("Couldn't open IP device: %m");
591
592 #if defined(INET6) && defined(SOL2)
593 ip6fd = open(UDP6_DEV_NAME, O_RDWR, 0);
594 if (ip6fd < 0)
595 fatal("Couldn't open IP device (2): %m");
596 #endif /* defined(INET6) && defined(SOL2) */
597
598 if (default_device && !notty)
599 tty_sid = getsid((pid_t)0);
600
601 pppfd = open(PPP_DEV_NAME, O_RDWR | O_NONBLOCK, 0);
602 if (pppfd < 0)
603 fatal("Can't open %s: %m", PPP_DEV_NAME);
604 if (kdebugflag & 1) {
605 x = PPPDBG_LOG + PPPDBG_DRIVER;
606 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
607 }
608
609 /* Assign a new PPA and get its unit number. */
610 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0)
611 fatal("Can't create new PPP interface: %m");
612
613 #if defined(SOL2)
614 /*
615 * Since sys_init() is called prior to ifname being set in main(),
616 * we need to get the ifname now, otherwise slifname(), and others,
617 * will fail, or maybe, I should move them to a later point ?
618 * <adi.masputra@sun.com>
619 */
620 sprintf(ifname, PPP_DRV_NAME "%d", ifunit);
621 #endif /* defined(SOL2) */
622 /*
623 * Open the ppp device again and link it under the ip multiplexor.
624 * IP will assign a unit number which hopefully is the same as ifunit.
625 * I don't know any way to be certain they will be the same. :-(
626 */
627 ifd = open(PPP_DEV_NAME, O_RDWR, 0);
628 if (ifd < 0)
629 fatal("Can't open %s (2): %m", PPP_DEV_NAME);
630 if (kdebugflag & 1) {
631 x = PPPDBG_LOG + PPPDBG_DRIVER;
632 strioctl(ifd, PPPIO_DEBUG, &x, sizeof(int), 0);
633 }
634
635 #if defined(INET6) && defined(SOL2)
636 i6fd = open(PPP_DEV_NAME, O_RDWR, 0);
637 if (i6fd < 0) {
638 close(ifd);
639 fatal("Can't open %s (3): %m", PPP_DEV_NAME);
640 }
641 if (kdebugflag & 1) {
642 x = PPPDBG_LOG + PPPDBG_DRIVER;
643 strioctl(i6fd, PPPIO_DEBUG, &x, sizeof(int), 0);
644 }
645 #endif /* defined(INET6) && defined(SOL2) */
646
647 #if defined(SOL2)
648 if (ioctl(ifd, I_PUSH, IP_MOD_NAME) < 0) {
649 close(ifd);
650 #if defined(INET6)
651 close(i6fd);
652 #endif /* defined(INET6) */
653 fatal("Can't push IP module: %m");
654 }
655
656 /*
657 * Assign ppa according to the unit number returned by ppp device
658 * after plumbing is completed above.
659 */
660 if (sifppa(ifd, ifunit) < 0) {
661 close (ifd);
662 #if defined(INET6)
663 close(i6fd);
664 #endif /* defined(INET6) */
665 fatal("Can't set ppa for unit %d: %m", ifunit);
666 }
667
668 #if defined(INET6)
669 /*
670 * An IPv6 interface is created anyway, even when the user does not
671 * explicitly enable it. Note that the interface will be marked
672 * IPv6 during slifname().
673 */
674 if (ioctl(i6fd, I_PUSH, IP_MOD_NAME) < 0) {
675 close(ifd);
676 close(i6fd);
677 fatal("Can't push IP module (2): %m");
678 }
679
680 /*
681 * Assign ppa according to the unit number returned by ppp device
682 * after plumbing is completed above. In addition, mark the interface
683 * as an IPv6 interface.
684 */
685 if (slifname(i6fd, ifunit) < 0) {
686 close(ifd);
687 close(i6fd);
688 fatal("Can't set ifname for unit %d: %m", ifunit);
689 }
690 #endif /* defined(INET6) */
691
692 ipmuxid = ioctl(ipfd, I_PLINK, ifd);
693 close(ifd);
694 if (ipmuxid < 0) {
695 #if defined(INET6)
696 close(i6fd);
697 #endif /* defined(INET6) */
698 fatal("Can't I_PLINK PPP device to IP: %m");
699 }
700
701 memset(&ifr, 0, sizeof(ifr));
702 sprintf(ifr.ifr_name, "%s", ifname);
703 ifr.ifr_ip_muxid = ipmuxid;
704
705 /*
706 * In Sol 8 and later, STREAMS dynamic module plumbing feature exists.
707 * This is so that an arbitrary module can be inserted, or deleted,
708 * between ip module and the device driver without tearing down the
709 * existing stream. Such feature requires the mux ids, which is set
710 * by SIOCSIFMUXID (or SIOCLSIFMUXID).
711 */
712 if (ioctl(ipfd, SIOCSIFMUXID, &ifr) < 0) {
713 ioctl(ipfd, I_PUNLINK, ipmuxid);
714 #if defined(INET6)
715 close(i6fd);
716 #endif /* defined(INET6) */
717 fatal("SIOCSIFMUXID: %m");
718 }
719
720 #else /* else if !defined(SOL2) */
721
722 if (dlpi_attach(ifd, ifunit) < 0 ||
723 dlpi_get_reply(ifd, &reply.prim, DL_OK_ACK, sizeof(reply)) < 0) {
724 close(ifd);
725 fatal("Can't attach to ppp%d: %m", ifunit);
726 }
727
728 ipmuxid = ioctl(ipfd, I_LINK, ifd);
729 close(ifd);
730 if (ipmuxid < 0)
731 fatal("Can't link PPP device to IP: %m");
732 #endif /* defined(SOL2) */
733
734 #if defined(INET6) && defined(SOL2)
735 ip6muxid = ioctl(ip6fd, I_PLINK, i6fd);
736 close(i6fd);
737 if (ip6muxid < 0) {
738 ioctl(ipfd, I_PUNLINK, ipmuxid);
739 fatal("Can't I_PLINK PPP device to IP (2): %m");
740 }
741
742 memset(&lifr, 0, sizeof(lifr));
743 sprintf(lifr.lifr_name, "%s", ifname);
744 lifr.lifr_ip_muxid = ip6muxid;
745
746 /*
747 * Let IP know of the mux id [see comment for SIOCSIFMUXID above]
748 */
749 if (ioctl(ip6fd, SIOCSLIFMUXID, &lifr) < 0) {
750 ioctl(ipfd, I_PUNLINK, ipmuxid);
751 ioctl(ip6fd, I_PUNLINK, ip6muxid);
752 fatal("Can't link PPP device to IP (2): %m");
753 }
754 #endif /* defined(INET6) && defined(SOL2) */
755
756 #if !defined(SOL2)
757 /* Set the interface name for the link. */
758 slprintf(ifr.ifr_name, sizeof(ifr.ifr_name), PPP_DRV_NAME "%d", ifunit);
759 ifr.ifr_metric = ipmuxid;
760 if (strioctl(ipfd, SIOCSIFNAME, (char *)&ifr, sizeof ifr, 0) < 0)
761 fatal("Can't set interface name %s: %m", ifr.ifr_name);
762 #endif /* !defined(SOL2) */
763
764 n_pollfds = 0;
765 }
766
767 /*
768 * sys_cleanup - restore any system state we modified before exiting:
769 * mark the interface down, delete default route and/or proxy arp entry.
770 * This should call die() because it's called from die().
771 */
772 void
sys_cleanup()773 sys_cleanup()
774 {
775 #if defined(SOL2)
776 struct ifreq ifr;
777 #if defined(INET6)
778 struct lifreq lifr;
779 #endif /* defined(INET6) */
780 #endif /* defined(SOL2) */
781
782 #if defined(SOL2) && defined(INET6)
783 if (if6_is_up)
784 sif6down(0);
785 #endif /* defined(SOL2) && defined(INET6) */
786 if (if_is_up)
787 sifdown(0);
788 if (default_route_gateway)
789 cifdefaultroute(0, default_route_gateway, default_route_gateway);
790 if (proxy_arp_addr)
791 cifproxyarp(0, proxy_arp_addr);
792 #if defined(SOL2)
793 /*
794 * Make sure we ask ip what the muxid, because 'ifconfig modlist' will
795 * unlink and re-link the modules, causing the muxid to change.
796 */
797 memset(&ifr, 0, sizeof(ifr));
798 sprintf(ifr.ifr_name, "%s", ifname);
799 if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
800 error("SIOCGIFFLAGS: %m");
801 return;
802 }
803
804 if (ioctl(ipfd, SIOCGIFMUXID, &ifr) < 0) {
805 error("SIOCGIFMUXID: %m");
806 return;
807 }
808
809 ipmuxid = ifr.ifr_ip_muxid;
810
811 if (ioctl(ipfd, I_PUNLINK, ipmuxid) < 0) {
812 error("Can't I_PUNLINK PPP from IP: %m");
813 return;
814 }
815 #if defined(INET6)
816 /*
817 * Make sure we ask ip what the muxid, because 'ifconfig modlist' will
818 * unlink and re-link the modules, causing the muxid to change.
819 */
820 memset(&lifr, 0, sizeof(lifr));
821 sprintf(lifr.lifr_name, "%s", ifname);
822 if (ioctl(ip6fd, SIOCGLIFFLAGS, &lifr) < 0) {
823 error("SIOCGLIFFLAGS: %m");
824 return;
825 }
826
827 if (ioctl(ip6fd, SIOCGLIFMUXID, &lifr) < 0) {
828 error("SIOCGLIFMUXID: %m");
829 return;
830 }
831
832 ip6muxid = lifr.lifr_ip_muxid;
833
834 if (ioctl(ip6fd, I_PUNLINK, ip6muxid) < 0) {
835 error("Can't I_PUNLINK PPP from IP (2): %m");
836 }
837 #endif /* defined(INET6) */
838 #endif /* defined(SOL2) */
839 }
840
841 /*
842 * sys_close - Clean up in a child process before execing.
843 */
844 void
sys_close()845 sys_close()
846 {
847 close(ipfd);
848 #if defined(INET6) && defined(SOL2)
849 close(ip6fd);
850 #endif /* defined(INET6) && defined(SOL2) */
851 if (pppfd >= 0)
852 close(pppfd);
853 }
854
855 /*
856 * sys_check_options - check the options that the user specified
857 */
858 int
sys_check_options()859 sys_check_options()
860 {
861 return 1;
862 }
863
864 #if 0
865 /*
866 * daemon - Detach us from controlling terminal session.
867 */
868 int
869 daemon(nochdir, noclose)
870 int nochdir, noclose;
871 {
872 int pid;
873
874 if ((pid = fork()) < 0)
875 return -1;
876 if (pid != 0)
877 exit(0); /* parent dies */
878 setsid();
879 if (!nochdir)
880 chdir("/");
881 if (!noclose) {
882 fclose(stdin); /* don't need stdin, stdout, stderr */
883 fclose(stdout);
884 fclose(stderr);
885 }
886 return 0;
887 }
888 #endif
889
890 /*
891 * ppp_available - check whether the system has any ppp interfaces
892 */
893 int
ppp_available()894 ppp_available()
895 {
896 struct stat buf;
897
898 return stat(PPP_DEV_NAME, &buf) >= 0;
899 }
900
901 /*
902 * any_compressions - see if compression is enabled or not
903 *
904 * In the STREAMS implementation of kernel-portion pppd,
905 * the comp STREAMS module performs the ACFC, PFC, as well
906 * CCP and VJ compressions. However, if the user has explicitly
907 * declare to not enable them from the command line, there is
908 * no point of having the comp module be pushed on the stream.
909 */
910 static int
any_compressions()911 any_compressions()
912 {
913 if ((!lcp_wantoptions[0].neg_accompression) &&
914 (!lcp_wantoptions[0].neg_pcompression) &&
915 (!ccp_protent.enabled_flag) &&
916 (!ipcp_wantoptions[0].neg_vj)) {
917 return 0;
918 }
919 return 1;
920 }
921
922 /*
923 * tty_establish_ppp - Turn the serial port into a ppp interface.
924 */
925 int
tty_establish_ppp(fd)926 tty_establish_ppp(fd)
927 int fd;
928 {
929 int i;
930
931 /* Pop any existing modules off the tty stream. */
932 for (i = 0;; ++i)
933 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
934 || strcmp(tty_modules[i], "ptem") == 0
935 || ioctl(fd, I_POP, 0) < 0)
936 break;
937 tty_nmodules = i;
938
939 /* Push the async hdlc module and the compressor module. */
940 tty_npushed = 0;
941
942 if(!sync_serial) {
943 if (ioctl(fd, I_PUSH, AHDLC_MOD_NAME) < 0) {
944 error("Couldn't push PPP Async HDLC module: %m");
945 return -1;
946 }
947 ++tty_npushed;
948 }
949 if (kdebugflag & 4) {
950 i = PPPDBG_LOG + PPPDBG_AHDLC;
951 strioctl(pppfd, PPPIO_DEBUG, &i, sizeof(int), 0);
952 }
953 /*
954 * There's no need to push comp module if we don't intend
955 * to compress anything
956 */
957 if (any_compressions()) {
958 if (ioctl(fd, I_PUSH, COMP_MOD_NAME) < 0)
959 error("Couldn't push PPP compression module: %m");
960 else
961 ++tty_npushed;
962 }
963
964 if (kdebugflag & 2) {
965 i = PPPDBG_LOG;
966 if (any_compressions())
967 i += PPPDBG_COMP;
968 strioctl(pppfd, PPPIO_DEBUG, &i, sizeof(int), 0);
969 }
970
971 /* Link the serial port under the PPP multiplexor. */
972 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
973 error("Can't link tty to PPP mux: %m");
974 return -1;
975 }
976
977 return pppfd;
978 }
979
980 /*
981 * tty_disestablish_ppp - Restore the serial port to normal operation.
982 * It attempts to reconstruct the stream with the previously popped
983 * modules. This shouldn't call die() because it's called from die().
984 */
985 void
tty_disestablish_ppp(fd)986 tty_disestablish_ppp(fd)
987 int fd;
988 {
989 int i;
990
991 if (fdmuxid >= 0) {
992 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
993 if (!hungup)
994 error("Can't unlink tty from PPP mux: %m");
995 }
996 fdmuxid = -1;
997
998 if (!hungup) {
999 while (tty_npushed > 0 && ioctl(fd, I_POP, 0) >= 0)
1000 --tty_npushed;
1001 for (i = tty_nmodules - 1; i >= 0; --i)
1002 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
1003 error("Couldn't restore tty module %s: %m",
1004 tty_modules[i]);
1005 }
1006 if (hungup && default_device && tty_sid > 0) {
1007 /*
1008 * If we have received a hangup, we need to send a SIGHUP
1009 * to the terminal's controlling process. The reason is
1010 * that the original stream head for the terminal hasn't
1011 * seen the M_HANGUP message (it went up through the ppp
1012 * driver to the stream head for our fd to /dev/ppp).
1013 */
1014 kill(tty_sid, SIGHUP);
1015 }
1016 }
1017 }
1018
1019 /*
1020 * Check whether the link seems not to be 8-bit clean.
1021 */
1022 void
clean_check()1023 clean_check()
1024 {
1025 int x;
1026 char *s;
1027
1028 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
1029 return;
1030 s = NULL;
1031 switch (~x) {
1032 case RCV_B7_0:
1033 s = "bit 7 set to 1";
1034 break;
1035 case RCV_B7_1:
1036 s = "bit 7 set to 0";
1037 break;
1038 case RCV_EVNP:
1039 s = "odd parity";
1040 break;
1041 case RCV_ODDP:
1042 s = "even parity";
1043 break;
1044 }
1045 if (s != NULL) {
1046 warn("Serial link is not 8-bit clean:");
1047 warn("All received characters had %s", s);
1048 }
1049 }
1050
1051 /*
1052 * List of valid speeds.
1053 */
1054 struct speed {
1055 int speed_int, speed_val;
1056 } speeds[] = {
1057 #ifdef B50
1058 { 50, B50 },
1059 #endif
1060 #ifdef B75
1061 { 75, B75 },
1062 #endif
1063 #ifdef B110
1064 { 110, B110 },
1065 #endif
1066 #ifdef B134
1067 { 134, B134 },
1068 #endif
1069 #ifdef B150
1070 { 150, B150 },
1071 #endif
1072 #ifdef B200
1073 { 200, B200 },
1074 #endif
1075 #ifdef B300
1076 { 300, B300 },
1077 #endif
1078 #ifdef B600
1079 { 600, B600 },
1080 #endif
1081 #ifdef B1200
1082 { 1200, B1200 },
1083 #endif
1084 #ifdef B1800
1085 { 1800, B1800 },
1086 #endif
1087 #ifdef B2000
1088 { 2000, B2000 },
1089 #endif
1090 #ifdef B2400
1091 { 2400, B2400 },
1092 #endif
1093 #ifdef B3600
1094 { 3600, B3600 },
1095 #endif
1096 #ifdef B4800
1097 { 4800, B4800 },
1098 #endif
1099 #ifdef B7200
1100 { 7200, B7200 },
1101 #endif
1102 #ifdef B9600
1103 { 9600, B9600 },
1104 #endif
1105 #ifdef B19200
1106 { 19200, B19200 },
1107 #endif
1108 #ifdef B38400
1109 { 38400, B38400 },
1110 #endif
1111 #ifdef EXTA
1112 { 19200, EXTA },
1113 #endif
1114 #ifdef EXTB
1115 { 38400, EXTB },
1116 #endif
1117 #ifdef B57600
1118 { 57600, B57600 },
1119 #endif
1120 #ifdef B76800
1121 { 76800, B76800 },
1122 #endif
1123 #ifdef B115200
1124 { 115200, B115200 },
1125 #endif
1126 #ifdef B153600
1127 { 153600, B153600 },
1128 #endif
1129 #ifdef B230400
1130 { 230400, B230400 },
1131 #endif
1132 #ifdef B307200
1133 { 307200, B307200 },
1134 #endif
1135 #ifdef B460800
1136 { 460800, B460800 },
1137 #endif
1138 { 0, 0 }
1139 };
1140
1141 /*
1142 * Translate from bits/second to a speed_t.
1143 */
1144 static int
translate_speed(bps)1145 translate_speed(bps)
1146 int bps;
1147 {
1148 struct speed *speedp;
1149
1150 if (bps == 0)
1151 return 0;
1152 for (speedp = speeds; speedp->speed_int; speedp++)
1153 if (bps == speedp->speed_int)
1154 return speedp->speed_val;
1155 warn("speed %d not supported", bps);
1156 return 0;
1157 }
1158
1159 /*
1160 * Translate from a speed_t to bits/second.
1161 */
1162 static int
baud_rate_of(speed)1163 baud_rate_of(speed)
1164 int speed;
1165 {
1166 struct speed *speedp;
1167
1168 if (speed == 0)
1169 return 0;
1170 for (speedp = speeds; speedp->speed_int; speedp++)
1171 if (speed == speedp->speed_val)
1172 return speedp->speed_int;
1173 return 0;
1174 }
1175
1176 /*
1177 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
1178 * at the requested speed, etc. If `local' is true, set CLOCAL
1179 * regardless of whether the modem option was specified.
1180 */
1181 void
set_up_tty(fd,local)1182 set_up_tty(fd, local)
1183 int fd, local;
1184 {
1185 int speed;
1186 struct termios tios;
1187 #if !defined (CRTSCTS)
1188 struct termiox tiox;
1189 #endif
1190
1191 if (!sync_serial && tcgetattr(fd, &tios) < 0)
1192 fatal("tcgetattr: %m");
1193
1194 #ifndef CRTSCTS
1195 termiox_ok = 1;
1196 if (!sync_serial && ioctl (fd, TCGETX, &tiox) < 0) {
1197 termiox_ok = 0;
1198 if (errno != ENOTTY)
1199 error("TCGETX: %m");
1200 }
1201 #endif
1202
1203 if (!restore_term) {
1204 inittermios = tios;
1205 #ifndef CRTSCTS
1206 inittermiox = tiox;
1207 #endif
1208 if (!sync_serial)
1209 ioctl(fd, TIOCGWINSZ, &wsinfo);
1210 }
1211
1212 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
1213 #ifdef CRTSCTS
1214 if (crtscts > 0)
1215 tios.c_cflag |= CRTSCTS;
1216 else if (crtscts < 0)
1217 tios.c_cflag &= ~CRTSCTS;
1218 #else
1219 if (crtscts != 0 && !termiox_ok) {
1220 error("Can't set RTS/CTS flow control");
1221 } else if (crtscts > 0) {
1222 tiox.x_hflag |= RTSXOFF|CTSXON;
1223 } else if (crtscts < 0) {
1224 tiox.x_hflag &= ~(RTSXOFF|CTSXON);
1225 }
1226 #endif
1227
1228 if (stop_bits >= 2)
1229 tios.c_cflag |= CSTOPB;
1230
1231 tios.c_cflag |= CS8 | CREAD | HUPCL;
1232 if (local || !modem)
1233 tios.c_cflag |= CLOCAL;
1234 tios.c_iflag = IGNBRK | IGNPAR;
1235 tios.c_oflag = 0;
1236 tios.c_lflag = 0;
1237 tios.c_cc[VMIN] = 1;
1238 tios.c_cc[VTIME] = 0;
1239
1240 if (crtscts == -2) {
1241 tios.c_iflag |= IXON | IXOFF;
1242 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
1243 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
1244 }
1245
1246 speed = translate_speed(inspeed);
1247 if (speed) {
1248 cfsetospeed(&tios, speed);
1249 cfsetispeed(&tios, speed);
1250 } else {
1251 speed = cfgetospeed(&tios);
1252 /*
1253 * We can't proceed if the serial port speed is 0,
1254 * since that implies that the serial port is disabled.
1255 */
1256 if ((speed == B0) && !sync_serial)
1257 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
1258 }
1259
1260 if (!sync_serial && tcsetattr(fd, TCSAFLUSH, &tios) < 0)
1261 fatal("tcsetattr: %m");
1262
1263 #ifndef CRTSCTS
1264 if (!sync_serial && termiox_ok && ioctl (fd, TCSETXF, &tiox) < 0){
1265 error("TCSETXF: %m");
1266 }
1267 #endif
1268
1269 baud_rate = inspeed = baud_rate_of(speed);
1270 if (!sync_serial)
1271 restore_term = 1;
1272 }
1273
1274 /*
1275 * restore_tty - restore the terminal to the saved settings.
1276 */
1277 void
restore_tty(fd)1278 restore_tty(fd)
1279 int fd;
1280 {
1281 if (restore_term) {
1282 if (!default_device) {
1283 /*
1284 * Turn off echoing, because otherwise we can get into
1285 * a loop with the tty and the modem echoing to each other.
1286 * We presume we are the sole user of this tty device, so
1287 * when we close it, it will revert to its defaults anyway.
1288 */
1289 inittermios.c_lflag &= ~(ECHO | ECHONL);
1290 }
1291 if (!sync_serial && tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
1292 if (!hungup && errno != ENXIO)
1293 warn("tcsetattr: %m");
1294 #ifndef CRTSCTS
1295 if (!sync_serial && ioctl (fd, TCSETXF, &inittermiox) < 0){
1296 if (!hungup && errno != ENXIO)
1297 error("TCSETXF: %m");
1298 }
1299 #endif
1300 if (!sync_serial)
1301 ioctl(fd, TIOCSWINSZ, &wsinfo);
1302 restore_term = 0;
1303 }
1304 }
1305
1306 /*
1307 * setdtr - control the DTR line on the serial port.
1308 * This is called from die(), so it shouldn't call die().
1309 */
1310 void
setdtr(fd,on)1311 setdtr(fd, on)
1312 int fd, on;
1313 {
1314 int modembits = TIOCM_DTR;
1315
1316 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
1317 }
1318
1319 /*
1320 * open_loopback - open the device we use for getting packets
1321 * in demand mode. Under Solaris 2, we use our existing fd
1322 * to the ppp driver.
1323 */
1324 int
open_ppp_loopback()1325 open_ppp_loopback()
1326 {
1327 return pppfd;
1328 }
1329
1330 /*
1331 * output - Output PPP packet.
1332 */
1333 void
output(unit,p,len)1334 output(unit, p, len)
1335 int unit;
1336 u_char *p;
1337 int len;
1338 {
1339 struct strbuf data;
1340 int retries;
1341 struct pollfd pfd;
1342
1343 dump_packet("sent", p, len);
1344 if (snoop_send_hook) snoop_send_hook(p, len);
1345
1346 data.len = len;
1347 data.buf = (caddr_t) p;
1348 retries = 4;
1349 while (putmsg(pppfd, NULL, &data, 0) < 0) {
1350 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
1351 if (errno != ENXIO)
1352 error("Couldn't send packet: %m");
1353 break;
1354 }
1355 pfd.fd = pppfd;
1356 pfd.events = POLLOUT;
1357 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
1358 }
1359 }
1360
1361
1362 /*
1363 * wait_input - wait until there is data available,
1364 * for the length of time specified by *timo (indefinite
1365 * if timo is NULL).
1366 */
1367 void
wait_input(timo)1368 wait_input(timo)
1369 struct timeval *timo;
1370 {
1371 int t;
1372
1373 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
1374 if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR)
1375 fatal("poll: %m");
1376 }
1377
1378 /*
1379 * add_fd - add an fd to the set that wait_input waits for.
1380 */
add_fd(fd)1381 void add_fd(fd)
1382 int fd;
1383 {
1384 int n;
1385
1386 for (n = 0; n < n_pollfds; ++n)
1387 if (pollfds[n].fd == fd)
1388 return;
1389 if (n_pollfds < MAX_POLLFDS) {
1390 pollfds[n_pollfds].fd = fd;
1391 pollfds[n_pollfds].events = POLLIN | POLLPRI | POLLHUP;
1392 ++n_pollfds;
1393 } else
1394 error("Too many inputs!");
1395 }
1396
1397 /*
1398 * remove_fd - remove an fd from the set that wait_input waits for.
1399 */
remove_fd(fd)1400 void remove_fd(fd)
1401 int fd;
1402 {
1403 int n;
1404
1405 for (n = 0; n < n_pollfds; ++n) {
1406 if (pollfds[n].fd == fd) {
1407 while (++n < n_pollfds)
1408 pollfds[n-1] = pollfds[n];
1409 --n_pollfds;
1410 break;
1411 }
1412 }
1413 }
1414
1415 #if 0
1416 /*
1417 * wait_loop_output - wait until there is data available on the
1418 * loopback, for the length of time specified by *timo (indefinite
1419 * if timo is NULL).
1420 */
1421 void
1422 wait_loop_output(timo)
1423 struct timeval *timo;
1424 {
1425 wait_input(timo);
1426 }
1427
1428 /*
1429 * wait_time - wait for a given length of time or until a
1430 * signal is received.
1431 */
1432 void
1433 wait_time(timo)
1434 struct timeval *timo;
1435 {
1436 int n;
1437
1438 n = select(0, NULL, NULL, NULL, timo);
1439 if (n < 0 && errno != EINTR)
1440 fatal("select: %m");
1441 }
1442 #endif
1443
1444
1445 /*
1446 * read_packet - get a PPP packet from the serial device.
1447 */
1448 int
read_packet(buf)1449 read_packet(buf)
1450 u_char *buf;
1451 {
1452 struct strbuf ctrl, data;
1453 int flags, len;
1454 unsigned char ctrlbuf[sizeof(union DL_primitives) + 64];
1455
1456 for (;;) {
1457 data.maxlen = PPP_MRU + PPP_HDRLEN;
1458 data.buf = (caddr_t) buf;
1459 ctrl.maxlen = sizeof(ctrlbuf);
1460 ctrl.buf = (caddr_t) ctrlbuf;
1461 flags = 0;
1462 len = getmsg(pppfd, &ctrl, &data, &flags);
1463 if (len < 0) {
1464 if (errno == EAGAIN || errno == EINTR)
1465 return -1;
1466 fatal("Error reading packet: %m");
1467 }
1468
1469 if (ctrl.len <= 0)
1470 return data.len;
1471
1472 /*
1473 * Got a M_PROTO or M_PCPROTO message. Interpret it
1474 * as a DLPI primitive??
1475 */
1476 if (debug)
1477 dbglog("got dlpi prim 0x%x, len=%d",
1478 ((union DL_primitives *)ctrlbuf)->dl_primitive, ctrl.len);
1479
1480 }
1481 }
1482
1483 /*
1484 * get_loop_output - get outgoing packets from the ppp device,
1485 * and detect when we want to bring the real link up.
1486 * Return value is 1 if we need to bring up the link, 0 otherwise.
1487 */
1488 int
get_loop_output()1489 get_loop_output()
1490 {
1491 int len;
1492 int rv = 0;
1493
1494 while ((len = read_packet(inpacket_buf)) > 0) {
1495 if (loop_frame(inpacket_buf, len))
1496 rv = 1;
1497 }
1498 return rv;
1499 }
1500
1501 /*
1502 * netif_set_mtu - set the MTU on the PPP network interface.
1503 */
1504 void
netif_set_mtu(unit,mtu)1505 netif_set_mtu(unit, mtu)
1506 int unit, mtu;
1507 {
1508 struct ifreq ifr;
1509 #if defined(INET6) && defined(SOL2)
1510 struct lifreq lifr;
1511 int fd;
1512 #endif /* defined(INET6) && defined(SOL2) */
1513
1514 memset(&ifr, 0, sizeof(ifr));
1515 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1516 ifr.ifr_metric = link_mtu;
1517 if (ioctl(ipfd, SIOCSIFMTU, &ifr) < 0) {
1518 error("Couldn't set IP MTU (%s): %m", ifr.ifr_name);
1519 }
1520
1521 #if defined(INET6) && defined(SOL2)
1522 fd = socket(AF_INET6, SOCK_DGRAM, 0);
1523 if (fd < 0)
1524 error("Couldn't open IPv6 socket: %m");
1525
1526 memset(&lifr, 0, sizeof(lifr));
1527 strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1528 lifr.lifr_mtu = link_mtu;
1529 if (ioctl(fd, SIOCSLIFMTU, &lifr) < 0) {
1530 close(fd);
1531 error("Couldn't set IPv6 MTU (%s): %m", ifr.ifr_name);
1532 }
1533 close(fd);
1534 #endif /* defined(INET6) && defined(SOL2) */
1535 }
1536
1537 /*
1538 * tty_send_config - configure the transmit characteristics of
1539 * the ppp interface.
1540 */
1541 void
tty_send_config(mtu,asyncmap,pcomp,accomp)1542 tty_send_config(mtu, asyncmap, pcomp, accomp)
1543 int mtu;
1544 u_int32_t asyncmap;
1545 int pcomp, accomp;
1546 {
1547 int cf[2];
1548
1549 link_mtu = mtu;
1550 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
1551 if (hungup && errno == ENXIO) {
1552 ++error_count;
1553 return;
1554 }
1555 error("Couldn't set MTU: %m");
1556 }
1557 if (fdmuxid >= 0) {
1558 if (!sync_serial) {
1559 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0)
1560 error("Couldn't set transmit ACCM: %m");
1561 }
1562 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
1563 cf[1] = COMP_PROT | COMP_AC;
1564 if (any_compressions() &&
1565 strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0)
1566 error("Couldn't set prot/AC compression: %m");
1567 }
1568 }
1569
1570 /*
1571 * tty_set_xaccm - set the extended transmit ACCM for the interface.
1572 */
1573 void
tty_set_xaccm(accm)1574 tty_set_xaccm(accm)
1575 ext_accm accm;
1576 {
1577 if (sync_serial)
1578 return;
1579
1580 if (fdmuxid >= 0
1581 && strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
1582 if (!hungup || errno != ENXIO)
1583 warn("Couldn't set extended ACCM: %m");
1584 }
1585 }
1586
1587 /*
1588 * tty_recv_config - configure the receive-side characteristics of
1589 * the ppp interface.
1590 */
1591 void
tty_recv_config(mru,asyncmap,pcomp,accomp)1592 tty_recv_config(mru, asyncmap, pcomp, accomp)
1593 int mru;
1594 u_int32_t asyncmap;
1595 int pcomp, accomp;
1596 {
1597 int cf[2];
1598
1599 link_mru = mru;
1600 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
1601 if (hungup && errno == ENXIO) {
1602 ++error_count;
1603 return;
1604 }
1605 error("Couldn't set MRU: %m");
1606 }
1607 if (fdmuxid >= 0) {
1608 if (!sync_serial) {
1609 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0)
1610 error("Couldn't set receive ACCM: %m");
1611 }
1612 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
1613 cf[1] = DECOMP_PROT | DECOMP_AC;
1614 if (any_compressions() &&
1615 strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0)
1616 error("Couldn't set prot/AC decompression: %m");
1617 }
1618 }
1619
1620 /*
1621 * ccp_test - ask kernel whether a given compression method
1622 * is acceptable for use.
1623 */
1624 int
ccp_test(unit,opt_ptr,opt_len,for_transmit)1625 ccp_test(unit, opt_ptr, opt_len, for_transmit)
1626 int unit, opt_len, for_transmit;
1627 u_char *opt_ptr;
1628 {
1629 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
1630 opt_ptr, opt_len, 0) >= 0)
1631 return 1;
1632 return (errno == ENOSR)? 0: -1;
1633 }
1634
1635 /*
1636 * ccp_flags_set - inform kernel about the current state of CCP.
1637 */
1638 void
ccp_flags_set(unit,isopen,isup)1639 ccp_flags_set(unit, isopen, isup)
1640 int unit, isopen, isup;
1641 {
1642 int cf[2];
1643
1644 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
1645 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
1646 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1647 if (!hungup || errno != ENXIO)
1648 error("Couldn't set kernel CCP state: %m");
1649 }
1650 }
1651
1652 /*
1653 * get_idle_time - return how long the link has been idle.
1654 */
1655 int
get_idle_time(u,ip)1656 get_idle_time(u, ip)
1657 int u;
1658 struct ppp_idle *ip;
1659 {
1660 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1661 }
1662
1663 /*
1664 * get_ppp_stats - return statistics for the link.
1665 */
1666 int
get_ppp_stats(u,stats)1667 get_ppp_stats(u, stats)
1668 int u;
1669 struct pppd_stats *stats;
1670 {
1671 struct ppp_stats s;
1672
1673 if (!sync_serial &&
1674 strioctl(pppfd, PPPIO_GETSTAT, &s, 0, sizeof(s)) < 0) {
1675 error("Couldn't get link statistics: %m");
1676 return 0;
1677 }
1678 stats->bytes_in = s.p.ppp_ibytes;
1679 stats->bytes_out = s.p.ppp_obytes;
1680 stats->pkts_in = s.p.ppp_ipackets;
1681 stats->pkts_out = s.p.ppp_opackets;
1682 return 1;
1683 }
1684
1685 #if 0
1686 /*
1687 * set_filters - transfer the pass and active filters to the kernel.
1688 */
1689 int
1690 set_filters(pass, active)
1691 struct bpf_program *pass, *active;
1692 {
1693 int ret = 1;
1694
1695 if (pass->bf_len > 0) {
1696 if (strioctl(pppfd, PPPIO_PASSFILT, pass,
1697 sizeof(struct bpf_program), 0) < 0) {
1698 error("Couldn't set pass-filter in kernel: %m");
1699 ret = 0;
1700 }
1701 }
1702 if (active->bf_len > 0) {
1703 if (strioctl(pppfd, PPPIO_ACTIVEFILT, active,
1704 sizeof(struct bpf_program), 0) < 0) {
1705 error("Couldn't set active-filter in kernel: %m");
1706 ret = 0;
1707 }
1708 }
1709 return ret;
1710 }
1711 #endif
1712
1713 /*
1714 * ccp_fatal_error - returns 1 if decompression was disabled as a
1715 * result of an error detected after decompression of a packet,
1716 * 0 otherwise. This is necessary because of patent nonsense.
1717 */
1718 int
ccp_fatal_error(unit)1719 ccp_fatal_error(unit)
1720 int unit;
1721 {
1722 int cf[2];
1723
1724 cf[0] = cf[1] = 0;
1725 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1726 if (errno != ENXIO && errno != EINVAL)
1727 error("Couldn't get compression flags: %m");
1728 return 0;
1729 }
1730 return cf[0] & CCP_FATALERROR;
1731 }
1732
1733 /*
1734 * sifvjcomp - config tcp header compression
1735 */
1736 int
sifvjcomp(u,vjcomp,xcidcomp,xmaxcid)1737 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1738 int u, vjcomp, xcidcomp, xmaxcid;
1739 {
1740 int cf[2];
1741 char maxcid[2];
1742
1743 if (vjcomp) {
1744 maxcid[0] = xcidcomp;
1745 maxcid[1] = 15; /* XXX should be rmaxcid */
1746 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1747 error("Couldn't initialize VJ compression: %m");
1748 }
1749 }
1750
1751 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1752 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1753 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1754 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1755 if (vjcomp)
1756 error("Couldn't enable VJ compression: %m");
1757 }
1758
1759 return 1;
1760 }
1761
1762 /*
1763 * sifup - Config the interface up and enable IP packets to pass.
1764 */
1765 int
sifup(u)1766 sifup(u)
1767 int u;
1768 {
1769 struct ifreq ifr;
1770
1771 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1772 if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
1773 error("Couldn't mark interface up (get): %m");
1774 return 0;
1775 }
1776 ifr.ifr_flags |= IFF_UP;
1777 if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1778 error("Couldn't mark interface up (set): %m");
1779 return 0;
1780 }
1781 if_is_up = 1;
1782 return 1;
1783 }
1784
1785 /*
1786 * sifdown - Config the interface down and disable IP.
1787 */
1788 int
sifdown(u)1789 sifdown(u)
1790 int u;
1791 {
1792 struct ifreq ifr;
1793
1794 if (ipmuxid < 0)
1795 return 1;
1796 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1797 if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
1798 error("Couldn't mark interface down (get): %m");
1799 return 0;
1800 }
1801 ifr.ifr_flags &= ~IFF_UP;
1802 if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1803 error("Couldn't mark interface down (set): %m");
1804 return 0;
1805 }
1806 if_is_up = 0;
1807 return 1;
1808 }
1809
1810 /*
1811 * sifnpmode - Set the mode for handling packets for a given NP.
1812 */
1813 int
sifnpmode(u,proto,mode)1814 sifnpmode(u, proto, mode)
1815 int u;
1816 int proto;
1817 enum NPmode mode;
1818 {
1819 int npi[2];
1820
1821 npi[0] = proto;
1822 npi[1] = (int) mode;
1823 if (strioctl(pppfd, PPPIO_NPMODE, &npi, 2 * sizeof(int), 0) < 0) {
1824 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1825 return 0;
1826 }
1827 return 1;
1828 }
1829
1830 #if defined(SOL2) && defined(INET6)
1831 /*
1832 * sif6up - Config the IPv6 interface up and enable IPv6 packets to pass.
1833 */
1834 int
sif6up(u)1835 sif6up(u)
1836 int u;
1837 {
1838 struct lifreq lifr;
1839 int fd;
1840
1841 fd = socket(AF_INET6, SOCK_DGRAM, 0);
1842 if (fd < 0) {
1843 return 0;
1844 }
1845
1846 memset(&lifr, 0, sizeof(lifr));
1847 strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1848 if (ioctl(fd, SIOCGLIFFLAGS, &lifr) < 0) {
1849 close(fd);
1850 return 0;
1851 }
1852
1853 lifr.lifr_flags |= IFF_UP;
1854 strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1855 if (ioctl(fd, SIOCSLIFFLAGS, &lifr) < 0) {
1856 close(fd);
1857 return 0;
1858 }
1859
1860 if6_is_up = 1;
1861 close(fd);
1862 return 1;
1863 }
1864
1865 /*
1866 * sifdown - Config the IPv6 interface down and disable IPv6.
1867 */
1868 int
sif6down(u)1869 sif6down(u)
1870 int u;
1871 {
1872 struct lifreq lifr;
1873 int fd;
1874
1875 fd = socket(AF_INET6, SOCK_DGRAM, 0);
1876 if (fd < 0)
1877 return 0;
1878
1879 memset(&lifr, 0, sizeof(lifr));
1880 strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1881 if (ioctl(fd, SIOCGLIFFLAGS, &lifr) < 0) {
1882 close(fd);
1883 return 0;
1884 }
1885
1886 lifr.lifr_flags &= ~IFF_UP;
1887 strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1888 if (ioctl(fd, SIOCGLIFFLAGS, &lifr) < 0) {
1889 close(fd);
1890 return 0;
1891 }
1892
1893 if6_is_up = 0;
1894 close(fd);
1895 return 1;
1896 }
1897
1898 /*
1899 * sif6addr - Config the interface with an IPv6 link-local address
1900 */
1901 int
sif6addr(u,o,h)1902 sif6addr(u, o, h)
1903 int u;
1904 eui64_t o, h;
1905 {
1906 struct lifreq lifr;
1907 struct sockaddr_storage laddr;
1908 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&laddr;
1909 int fd;
1910
1911 fd = socket(AF_INET6, SOCK_DGRAM, 0);
1912 if (fd < 0)
1913 return 0;
1914
1915 memset(&lifr, 0, sizeof(lifr));
1916 strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1917
1918 /*
1919 * Do this because /dev/ppp responds to DL_PHYS_ADDR_REQ with
1920 * zero values, hence the interface token came to be zero too,
1921 * and without this, in.ndpd will complain
1922 */
1923 IN6_LLTOKEN_FROM_EUI64(lifr, sin6, o);
1924 if (ioctl(fd, SIOCSLIFTOKEN, &lifr) < 0) {
1925 close(fd);
1926 return 0;
1927 }
1928
1929 /*
1930 * Set the interface address and destination address
1931 */
1932 IN6_LLADDR_FROM_EUI64(lifr, sin6, o);
1933 if (ioctl(fd, SIOCSLIFADDR, &lifr) < 0) {
1934 close(fd);
1935 return 0;
1936 }
1937
1938 memset(&lifr, 0, sizeof(lifr));
1939 strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1940 IN6_LLADDR_FROM_EUI64(lifr, sin6, h);
1941 if (ioctl(fd, SIOCSLIFDSTADDR, &lifr) < 0) {
1942 close(fd);
1943 return 0;
1944 }
1945
1946 return 1;
1947 }
1948
1949 /*
1950 * cif6addr - Remove the IPv6 address from interface
1951 */
1952 int
cif6addr(u,o,h)1953 cif6addr(u, o, h)
1954 int u;
1955 eui64_t o, h;
1956 {
1957 return 1;
1958 }
1959
1960 #endif /* defined(SOL2) && defined(INET6) */
1961
1962
1963 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1964
1965 /*
1966 * sifaddr - Config the interface IP addresses and netmask.
1967 */
1968 int
sifaddr(u,o,h,m)1969 sifaddr(u, o, h, m)
1970 int u;
1971 u_int32_t o, h, m;
1972 {
1973 struct ifreq ifr;
1974 int ret = 1;
1975
1976 memset(&ifr, 0, sizeof(ifr));
1977 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1978 ifr.ifr_addr.sa_family = AF_INET;
1979 INET_ADDR(ifr.ifr_addr) = m;
1980 if (ioctl(ipfd, SIOCSIFNETMASK, &ifr) < 0) {
1981 error("Couldn't set IP netmask: %m");
1982 ret = 0;
1983 }
1984 ifr.ifr_addr.sa_family = AF_INET;
1985 INET_ADDR(ifr.ifr_addr) = o;
1986 if (ioctl(ipfd, SIOCSIFADDR, &ifr) < 0) {
1987 error("Couldn't set local IP address: %m");
1988 ret = 0;
1989 }
1990
1991 /*
1992 * On some systems, we have to explicitly set the point-to-point
1993 * flag bit before we can set a destination address.
1994 */
1995 if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) >= 0
1996 && (ifr.ifr_flags & IFF_POINTOPOINT) == 0) {
1997 ifr.ifr_flags |= IFF_POINTOPOINT;
1998 if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1999 error("Couldn't mark interface pt-to-pt: %m");
2000 ret = 0;
2001 }
2002 }
2003 ifr.ifr_dstaddr.sa_family = AF_INET;
2004 INET_ADDR(ifr.ifr_dstaddr) = h;
2005 if (ioctl(ipfd, SIOCSIFDSTADDR, &ifr) < 0) {
2006 error("Couldn't set remote IP address: %m");
2007 ret = 0;
2008 }
2009
2010 remote_addr = h;
2011 return ret;
2012 }
2013
2014 /*
2015 * cifaddr - Clear the interface IP addresses, and delete routes
2016 * through the interface if possible.
2017 */
2018 int
cifaddr(u,o,h)2019 cifaddr(u, o, h)
2020 int u;
2021 u_int32_t o, h;
2022 {
2023 #if defined(__USLC__) /* was: #if 0 */
2024 cifroute(unit, ouraddr, hisaddr);
2025 if (ipmuxid >= 0) {
2026 notice("Removing ppp interface unit");
2027 if (ioctl(ipfd, I_UNLINK, ipmuxid) < 0) {
2028 error("Can't remove ppp interface unit: %m");
2029 return 0;
2030 }
2031 ipmuxid = -1;
2032 }
2033 #endif
2034 remote_addr = 0;
2035 return 1;
2036 }
2037
2038 /*
2039 * sifdefaultroute - assign a default route through the address given.
2040 */
2041 int
sifdefaultroute(u,l,g)2042 sifdefaultroute(u, l, g)
2043 int u;
2044 u_int32_t l, g;
2045 {
2046 struct rtentry rt;
2047
2048 #if defined(__USLC__)
2049 g = l; /* use the local address as gateway */
2050 #endif
2051 memset(&rt, 0, sizeof(rt));
2052 rt.rt_dst.sa_family = AF_INET;
2053 INET_ADDR(rt.rt_dst) = 0;
2054 rt.rt_gateway.sa_family = AF_INET;
2055 INET_ADDR(rt.rt_gateway) = g;
2056 rt.rt_flags = RTF_GATEWAY;
2057
2058 if (ioctl(ipfd, SIOCADDRT, &rt) < 0) {
2059 error("Can't add default route: %m");
2060 return 0;
2061 }
2062
2063 default_route_gateway = g;
2064 return 1;
2065 }
2066
2067 /*
2068 * cifdefaultroute - delete a default route through the address given.
2069 */
2070 int
cifdefaultroute(u,l,g)2071 cifdefaultroute(u, l, g)
2072 int u;
2073 u_int32_t l, g;
2074 {
2075 struct rtentry rt;
2076
2077 #if defined(__USLC__)
2078 g = l; /* use the local address as gateway */
2079 #endif
2080 memset(&rt, 0, sizeof(rt));
2081 rt.rt_dst.sa_family = AF_INET;
2082 INET_ADDR(rt.rt_dst) = 0;
2083 rt.rt_gateway.sa_family = AF_INET;
2084 INET_ADDR(rt.rt_gateway) = g;
2085 rt.rt_flags = RTF_GATEWAY;
2086
2087 if (ioctl(ipfd, SIOCDELRT, &rt) < 0) {
2088 error("Can't delete default route: %m");
2089 return 0;
2090 }
2091
2092 default_route_gateway = 0;
2093 return 1;
2094 }
2095
2096 /*
2097 * sifproxyarp - Make a proxy ARP entry for the peer.
2098 */
2099 int
sifproxyarp(unit,hisaddr)2100 sifproxyarp(unit, hisaddr)
2101 int unit;
2102 u_int32_t hisaddr;
2103 {
2104 struct arpreq arpreq;
2105
2106 memset(&arpreq, 0, sizeof(arpreq));
2107 if (!get_ether_addr(hisaddr, &arpreq.arp_ha))
2108 return 0;
2109
2110 arpreq.arp_pa.sa_family = AF_INET;
2111 INET_ADDR(arpreq.arp_pa) = hisaddr;
2112 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
2113 if (ioctl(ipfd, SIOCSARP, (caddr_t) &arpreq) < 0) {
2114 error("Couldn't set proxy ARP entry: %m");
2115 return 0;
2116 }
2117
2118 proxy_arp_addr = hisaddr;
2119 return 1;
2120 }
2121
2122 /*
2123 * cifproxyarp - Delete the proxy ARP entry for the peer.
2124 */
2125 int
cifproxyarp(unit,hisaddr)2126 cifproxyarp(unit, hisaddr)
2127 int unit;
2128 u_int32_t hisaddr;
2129 {
2130 struct arpreq arpreq;
2131
2132 memset(&arpreq, 0, sizeof(arpreq));
2133 arpreq.arp_pa.sa_family = AF_INET;
2134 INET_ADDR(arpreq.arp_pa) = hisaddr;
2135 if (ioctl(ipfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
2136 error("Couldn't delete proxy ARP entry: %m");
2137 return 0;
2138 }
2139
2140 proxy_arp_addr = 0;
2141 return 1;
2142 }
2143
2144 /*
2145 * get_ether_addr - get the hardware address of an interface on the
2146 * the same subnet as ipaddr.
2147 */
2148 #define MAX_IFS 32
2149
2150 static int
get_ether_addr(ipaddr,hwaddr)2151 get_ether_addr(ipaddr, hwaddr)
2152 u_int32_t ipaddr;
2153 struct sockaddr *hwaddr;
2154 {
2155 struct ifreq *ifr, *ifend, ifreq;
2156 int nif;
2157 struct ifconf ifc;
2158 u_int32_t ina, mask;
2159
2160 /*
2161 * Scan through the system's network interfaces.
2162 */
2163 #ifdef SIOCGIFNUM
2164 if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0)
2165 #endif
2166 nif = MAX_IFS;
2167 ifc.ifc_len = nif * sizeof(struct ifreq);
2168 ifc.ifc_buf = (caddr_t) malloc(ifc.ifc_len);
2169 if (ifc.ifc_buf == 0)
2170 return 0;
2171 if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) {
2172 warn("Couldn't get system interface list: %m");
2173 free(ifc.ifc_buf);
2174 return 0;
2175 }
2176 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
2177 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
2178 if (ifr->ifr_addr.sa_family != AF_INET)
2179 continue;
2180 /*
2181 * Check that the interface is up, and not point-to-point or loopback.
2182 */
2183 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
2184 if (ioctl(ipfd, SIOCGIFFLAGS, &ifreq) < 0)
2185 continue;
2186 if ((ifreq.ifr_flags &
2187 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
2188 != (IFF_UP|IFF_BROADCAST))
2189 continue;
2190 /*
2191 * Get its netmask and check that it's on the right subnet.
2192 */
2193 if (ioctl(ipfd, SIOCGIFNETMASK, &ifreq) < 0)
2194 continue;
2195 ina = INET_ADDR(ifr->ifr_addr);
2196 mask = INET_ADDR(ifreq.ifr_addr);
2197 if ((ipaddr & mask) == (ina & mask))
2198 break;
2199 }
2200
2201 if (ifr >= ifend) {
2202 warn("No suitable interface found for proxy ARP");
2203 free(ifc.ifc_buf);
2204 return 0;
2205 }
2206
2207 info("found interface %s for proxy ARP", ifr->ifr_name);
2208 if (!get_hw_addr(ifr->ifr_name, ina, hwaddr)) {
2209 error("Couldn't get hardware address for %s", ifr->ifr_name);
2210 free(ifc.ifc_buf);
2211 return 0;
2212 }
2213
2214 free(ifc.ifc_buf);
2215 return 1;
2216 }
2217
2218 /*
2219 * get_hw_addr_dlpi - obtain the hardware address using DLPI
2220 */
2221 static int
get_hw_addr_dlpi(name,hwaddr)2222 get_hw_addr_dlpi(name, hwaddr)
2223 char *name;
2224 struct sockaddr *hwaddr;
2225 {
2226 char *q;
2227 int unit, iffd, adrlen;
2228 unsigned char *adrp;
2229 char ifdev[24];
2230 struct {
2231 union DL_primitives prim;
2232 char space[64];
2233 } reply;
2234
2235 /*
2236 * We have to open the device and ask it for its hardware address.
2237 * First split apart the device name and unit.
2238 */
2239 slprintf(ifdev, sizeof(ifdev), "/dev/%s", name);
2240 for (q = ifdev + strlen(ifdev); --q >= ifdev; )
2241 if (!isdigit(*q))
2242 break;
2243 unit = atoi(q+1);
2244 q[1] = 0;
2245
2246 /*
2247 * Open the device and do a DLPI attach and phys_addr_req.
2248 */
2249 iffd = open(ifdev, O_RDWR);
2250 if (iffd < 0) {
2251 error("Can't open %s: %m", ifdev);
2252 return 0;
2253 }
2254 if (dlpi_attach(iffd, unit) < 0
2255 || dlpi_get_reply(iffd, &reply.prim, DL_OK_ACK, sizeof(reply)) < 0
2256 || dlpi_info_req(iffd) < 0
2257 || dlpi_get_reply(iffd, &reply.prim, DL_INFO_ACK, sizeof(reply)) < 0) {
2258 close(iffd);
2259 return 0;
2260 }
2261
2262 adrlen = reply.prim.info_ack.dl_addr_length;
2263 adrp = (unsigned char *)&reply + reply.prim.info_ack.dl_addr_offset;
2264
2265 #if DL_CURRENT_VERSION >= 2
2266 if (reply.prim.info_ack.dl_sap_length < 0)
2267 adrlen += reply.prim.info_ack.dl_sap_length;
2268 else
2269 adrp += reply.prim.info_ack.dl_sap_length;
2270 #endif
2271
2272 hwaddr->sa_family = AF_UNSPEC;
2273 memcpy(hwaddr->sa_data, adrp, adrlen);
2274
2275 return 1;
2276 }
2277 /*
2278 * get_hw_addr - obtain the hardware address for a named interface.
2279 */
2280 static int
get_hw_addr(name,ina,hwaddr)2281 get_hw_addr(name, ina, hwaddr)
2282 char *name;
2283 u_int32_t ina;
2284 struct sockaddr *hwaddr;
2285 {
2286 /* New way - get the address by doing an arp request. */
2287 int s;
2288 struct arpreq req;
2289
2290 s = socket(AF_INET, SOCK_DGRAM, 0);
2291 if (s < 0)
2292 return 0;
2293 memset(&req, 0, sizeof(req));
2294 req.arp_pa.sa_family = AF_INET;
2295 INET_ADDR(req.arp_pa) = ina;
2296 if (ioctl(s, SIOCGARP, &req) < 0) {
2297 error("Couldn't get ARP entry for %s: %m", ip_ntoa(ina));
2298 return 0;
2299 }
2300 *hwaddr = req.arp_ha;
2301 hwaddr->sa_family = AF_UNSPEC;
2302
2303 return 1;
2304 }
2305
2306 static int
dlpi_attach(fd,ppa)2307 dlpi_attach(fd, ppa)
2308 int fd, ppa;
2309 {
2310 dl_attach_req_t req;
2311 struct strbuf buf;
2312
2313 req.dl_primitive = DL_ATTACH_REQ;
2314 req.dl_ppa = ppa;
2315 buf.len = sizeof(req);
2316 buf.buf = (void *) &req;
2317 return putmsg(fd, &buf, NULL, RS_HIPRI);
2318 }
2319
2320 static int
dlpi_info_req(fd)2321 dlpi_info_req(fd)
2322 int fd;
2323 {
2324 dl_info_req_t req;
2325 struct strbuf buf;
2326
2327 req.dl_primitive = DL_INFO_REQ;
2328 buf.len = sizeof(req);
2329 buf.buf = (void *) &req;
2330 return putmsg(fd, &buf, NULL, RS_HIPRI);
2331 }
2332
2333 static int
dlpi_get_reply(fd,reply,expected_prim,maxlen)2334 dlpi_get_reply(fd, reply, expected_prim, maxlen)
2335 union DL_primitives *reply;
2336 int fd, expected_prim, maxlen;
2337 {
2338 struct strbuf buf;
2339 int flags, n;
2340 struct pollfd pfd;
2341
2342 /*
2343 * Use poll to wait for a message with a timeout.
2344 */
2345 pfd.fd = fd;
2346 pfd.events = POLLIN | POLLPRI;
2347 do {
2348 n = poll(&pfd, 1, 1000);
2349 } while (n == -1 && errno == EINTR);
2350 if (n <= 0)
2351 return -1;
2352
2353 /*
2354 * Get the reply.
2355 */
2356 buf.maxlen = maxlen;
2357 buf.buf = (void *) reply;
2358 flags = 0;
2359 if (getmsg(fd, &buf, NULL, &flags) < 0)
2360 return -1;
2361
2362 if (buf.len < sizeof(ulong)) {
2363 if (debug)
2364 dbglog("dlpi response short (len=%d)\n", buf.len);
2365 return -1;
2366 }
2367
2368 if (reply->dl_primitive == expected_prim)
2369 return 0;
2370
2371 if (debug) {
2372 if (reply->dl_primitive == DL_ERROR_ACK) {
2373 dbglog("dlpi error %d (unix errno %d) for prim %x\n",
2374 reply->error_ack.dl_errno, reply->error_ack.dl_unix_errno,
2375 reply->error_ack.dl_error_primitive);
2376 } else {
2377 dbglog("dlpi unexpected response prim %x\n",
2378 reply->dl_primitive);
2379 }
2380 }
2381
2382 return -1;
2383 }
2384
2385 /*
2386 * Return user specified netmask, modified by any mask we might determine
2387 * for address `addr' (in network byte order).
2388 * Here we scan through the system's list of interfaces, looking for
2389 * any non-point-to-point interfaces which might appear to be on the same
2390 * network as `addr'. If we find any, we OR in their netmask to the
2391 * user-specified netmask.
2392 */
2393 u_int32_t
GetMask(addr)2394 GetMask(addr)
2395 u_int32_t addr;
2396 {
2397 u_int32_t mask, nmask, ina;
2398 struct ifreq *ifr, *ifend, ifreq;
2399 int nif;
2400 struct ifconf ifc;
2401
2402 addr = ntohl(addr);
2403 if (IN_CLASSA(addr)) /* determine network mask for address class */
2404 nmask = IN_CLASSA_NET;
2405 else if (IN_CLASSB(addr))
2406 nmask = IN_CLASSB_NET;
2407 else
2408 nmask = IN_CLASSC_NET;
2409 /* class D nets are disallowed by bad_ip_adrs */
2410 mask = netmask | htonl(nmask);
2411
2412 /*
2413 * Scan through the system's network interfaces.
2414 */
2415 #ifdef SIOCGIFNUM
2416 if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0)
2417 #endif
2418 nif = MAX_IFS;
2419 ifc.ifc_len = nif * sizeof(struct ifreq);
2420 ifc.ifc_buf = (caddr_t) malloc(ifc.ifc_len);
2421 if (ifc.ifc_buf == 0)
2422 return mask;
2423 if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) {
2424 warn("Couldn't get system interface list: %m");
2425 free(ifc.ifc_buf);
2426 return mask;
2427 }
2428 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
2429 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
2430 /*
2431 * Check the interface's internet address.
2432 */
2433 if (ifr->ifr_addr.sa_family != AF_INET)
2434 continue;
2435 ina = INET_ADDR(ifr->ifr_addr);
2436 if ((ntohl(ina) & nmask) != (addr & nmask))
2437 continue;
2438 /*
2439 * Check that the interface is up, and not point-to-point or loopback.
2440 */
2441 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
2442 if (ioctl(ipfd, SIOCGIFFLAGS, &ifreq) < 0)
2443 continue;
2444 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
2445 != IFF_UP)
2446 continue;
2447 /*
2448 * Get its netmask and OR it into our mask.
2449 */
2450 if (ioctl(ipfd, SIOCGIFNETMASK, &ifreq) < 0)
2451 continue;
2452 mask |= INET_ADDR(ifreq.ifr_addr);
2453 }
2454
2455 free(ifc.ifc_buf);
2456 return mask;
2457 }
2458
2459 /*
2460 * logwtmp - write an accounting record to the /var/adm/wtmp file.
2461 */
2462 void
logwtmp(line,name,host)2463 logwtmp(line, name, host)
2464 const char *line, *name, *host;
2465 {
2466 static struct utmpx utmpx;
2467
2468 if (name[0] != 0) {
2469 /* logging in */
2470 strncpy(utmpx.ut_user, name, sizeof(utmpx.ut_user));
2471 strncpy(utmpx.ut_line, line, sizeof(utmpx.ut_line));
2472 strncpy(utmpx.ut_host, host, sizeof(utmpx.ut_host));
2473 if (*host != '\0') {
2474 utmpx.ut_syslen = strlen(host) + 1;
2475 if (utmpx.ut_syslen > sizeof(utmpx.ut_host))
2476 utmpx.ut_syslen = sizeof(utmpx.ut_host);
2477 }
2478 utmpx.ut_pid = getpid();
2479 utmpx.ut_type = USER_PROCESS;
2480 } else {
2481 utmpx.ut_type = DEAD_PROCESS;
2482 }
2483 gettimeofday(&utmpx.ut_tv, NULL);
2484 updwtmpx("/var/adm/wtmpx", &utmpx);
2485 }
2486
2487 /*
2488 * get_host_seed - return the serial number of this machine.
2489 */
2490 int
get_host_seed()2491 get_host_seed()
2492 {
2493 char buf[32];
2494
2495 if (sysinfo(SI_HW_SERIAL, buf, sizeof(buf)) < 0) {
2496 error("sysinfo: %m");
2497 return 0;
2498 }
2499 return (int) strtoul(buf, NULL, 16);
2500 }
2501
2502 static int
strioctl(fd,cmd,ptr,ilen,olen)2503 strioctl(fd, cmd, ptr, ilen, olen)
2504 int fd, cmd, ilen, olen;
2505 void *ptr;
2506 {
2507 struct strioctl str;
2508
2509 str.ic_cmd = cmd;
2510 str.ic_timout = 0;
2511 str.ic_len = ilen;
2512 str.ic_dp = ptr;
2513 if (ioctl(fd, I_STR, &str) == -1)
2514 return -1;
2515 if (str.ic_len != olen)
2516 dbglog("strioctl: expected %d bytes, got %d for cmd %x\n",
2517 olen, str.ic_len, cmd);
2518 return 0;
2519 }
2520
2521 #if 0
2522 /*
2523 * lock - create a lock file for the named lock device
2524 */
2525
2526 #define LOCK_PREFIX "/var/spool/locks/LK."
2527 static char lock_file[40]; /* name of lock file created */
2528
2529 int
2530 lock(dev)
2531 char *dev;
2532 {
2533 int n, fd, pid;
2534 struct stat sbuf;
2535 char ascii_pid[12];
2536
2537 if (stat(dev, &sbuf) < 0) {
2538 error("Can't get device number for %s: %m", dev);
2539 return -1;
2540 }
2541 if ((sbuf.st_mode & S_IFMT) != S_IFCHR) {
2542 error("Can't lock %s: not a character device", dev);
2543 return -1;
2544 }
2545 slprintf(lock_file, sizeof(lock_file), "%s%03d.%03d.%03d",
2546 LOCK_PREFIX, major(sbuf.st_dev),
2547 major(sbuf.st_rdev), minor(sbuf.st_rdev));
2548
2549 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
2550 if (errno == EEXIST
2551 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
2552 /* Read the lock file to find out who has the device locked */
2553 n = read(fd, ascii_pid, 11);
2554 if (n <= 0) {
2555 error("Can't read pid from lock file %s", lock_file);
2556 close(fd);
2557 } else {
2558 ascii_pid[n] = 0;
2559 pid = atoi(ascii_pid);
2560 if (pid > 0 && kill(pid, 0) == -1 && errno == ESRCH) {
2561 /* pid no longer exists - remove the lock file */
2562 if (unlink(lock_file) == 0) {
2563 close(fd);
2564 notice("Removed stale lock on %s (pid %d)",
2565 dev, pid);
2566 continue;
2567 } else
2568 warn("Couldn't remove stale lock on %s",
2569 dev);
2570 } else
2571 notice("Device %s is locked by pid %d",
2572 dev, pid);
2573 }
2574 close(fd);
2575 } else
2576 error("Can't create lock file %s: %m", lock_file);
2577 lock_file[0] = 0;
2578 return -1;
2579 }
2580
2581 slprintf(ascii_pid, sizeof(ascii_pid), "%10d\n", getpid());
2582 write(fd, ascii_pid, 11);
2583
2584 close(fd);
2585 return 1;
2586 }
2587
2588 /*
2589 * unlock - remove our lockfile
2590 */
2591 void
2592 unlock()
2593 {
2594 if (lock_file[0]) {
2595 unlink(lock_file);
2596 lock_file[0] = 0;
2597 }
2598 }
2599 #endif
2600
2601 /*
2602 * cifroute - delete a route through the addresses given.
2603 */
2604 int
cifroute(u,our,his)2605 cifroute(u, our, his)
2606 int u;
2607 u_int32_t our, his;
2608 {
2609 struct rtentry rt;
2610
2611 memset(&rt, 0, sizeof(rt));
2612 rt.rt_dst.sa_family = AF_INET;
2613 INET_ADDR(rt.rt_dst) = his;
2614 rt.rt_gateway.sa_family = AF_INET;
2615 INET_ADDR(rt.rt_gateway) = our;
2616 rt.rt_flags = RTF_HOST;
2617
2618 if (ioctl(ipfd, SIOCDELRT, &rt) < 0) {
2619 error("Can't delete route: %m");
2620 return 0;
2621 }
2622
2623 return 1;
2624 }
2625
2626 /*
2627 * have_route_to - determine if the system has a route to the specified
2628 * IP address. Returns 0 if not, 1 if so, -1 if we can't tell.
2629 * `addr' is in network byte order.
2630 * For demand mode to work properly, we have to ignore routes
2631 * through our own interface.
2632 */
2633 #ifndef T_CURRENT /* needed for Solaris 2.5 */
2634 #define T_CURRENT MI_T_CURRENT
2635 #endif
2636
2637 int
have_route_to(addr)2638 have_route_to(addr)
2639 u_int32_t addr;
2640 {
2641 #ifdef SOL2
2642 int fd, r, flags, i;
2643 struct {
2644 struct T_optmgmt_req req;
2645 struct opthdr hdr;
2646 } req;
2647 union {
2648 struct T_optmgmt_ack ack;
2649 unsigned char space[64];
2650 } ack;
2651 struct opthdr *rh;
2652 struct strbuf cbuf, dbuf;
2653 int nroutes;
2654 mib2_ipRouteEntry_t routes[8];
2655 mib2_ipRouteEntry_t *rp;
2656
2657 fd = open(mux_dev_name, O_RDWR);
2658 if (fd < 0) {
2659 warn("have_route_to: couldn't open %s: %m", mux_dev_name);
2660 return -1;
2661 }
2662
2663 req.req.PRIM_type = T_OPTMGMT_REQ;
2664 req.req.OPT_offset = (char *) &req.hdr - (char *) &req;
2665 req.req.OPT_length = sizeof(req.hdr);
2666 req.req.MGMT_flags = T_CURRENT;
2667
2668 req.hdr.level = MIB2_IP;
2669 req.hdr.name = 0;
2670 req.hdr.len = 0;
2671
2672 cbuf.buf = (char *) &req;
2673 cbuf.len = sizeof(req);
2674
2675 if (putmsg(fd, &cbuf, NULL, 0) == -1) {
2676 warn("have_route_to: putmsg: %m");
2677 close(fd);
2678 return -1;
2679 }
2680
2681 for (;;) {
2682 cbuf.buf = (char *) &ack;
2683 cbuf.maxlen = sizeof(ack);
2684 dbuf.buf = (char *) routes;
2685 dbuf.maxlen = sizeof(routes);
2686 flags = 0;
2687 r = getmsg(fd, &cbuf, &dbuf, &flags);
2688 if (r == -1) {
2689 warn("have_route_to: getmsg: %m");
2690 close(fd);
2691 return -1;
2692 }
2693
2694 if (cbuf.len < sizeof(struct T_optmgmt_ack)
2695 || ack.ack.PRIM_type != T_OPTMGMT_ACK
2696 || ack.ack.MGMT_flags != T_SUCCESS
2697 || ack.ack.OPT_length < sizeof(struct opthdr)) {
2698 dbglog("have_route_to: bad message len=%d prim=%d",
2699 cbuf.len, ack.ack.PRIM_type);
2700 close(fd);
2701 return -1;
2702 }
2703
2704 rh = (struct opthdr *) ((char *)&ack + ack.ack.OPT_offset);
2705 if (rh->level == 0 && rh->name == 0)
2706 break;
2707 if (rh->level != MIB2_IP || rh->name != MIB2_IP_21) {
2708 while (r == MOREDATA)
2709 r = getmsg(fd, NULL, &dbuf, &flags);
2710 continue;
2711 }
2712
2713 for (;;) {
2714 nroutes = dbuf.len / sizeof(mib2_ipRouteEntry_t);
2715 for (rp = routes, i = 0; i < nroutes; ++i, ++rp) {
2716 if (rp->ipRouteMask != ~0) {
2717 dbglog("have_route_to: dest=%x gw=%x mask=%x\n",
2718 rp->ipRouteDest, rp->ipRouteNextHop,
2719 rp->ipRouteMask);
2720 if (((addr ^ rp->ipRouteDest) & rp->ipRouteMask) == 0
2721 && rp->ipRouteNextHop != remote_addr)
2722 return 1;
2723 }
2724 }
2725 if (r == 0)
2726 break;
2727 r = getmsg(fd, NULL, &dbuf, &flags);
2728 }
2729 }
2730 close(fd);
2731 return 0;
2732 #else
2733 return -1;
2734 #endif /* SOL2 */
2735 }
2736
2737 /*
2738 * get_pty - get a pty master/slave pair and chown the slave side to
2739 * the uid given. Assumes slave_name points to MAXPATHLEN bytes of space.
2740 */
2741 int
get_pty(master_fdp,slave_fdp,slave_name,uid)2742 get_pty(master_fdp, slave_fdp, slave_name, uid)
2743 int *master_fdp;
2744 int *slave_fdp;
2745 char *slave_name;
2746 int uid;
2747 {
2748 int mfd, sfd;
2749 char *pty_name;
2750
2751 mfd = open("/dev/ptmx", O_RDWR);
2752 if (mfd < 0) {
2753 error("Couldn't open pty master: %m");
2754 return 0;
2755 }
2756
2757 pty_name = ptsname(mfd);
2758 if (pty_name == NULL) {
2759 error("Couldn't get name of pty slave");
2760 close(mfd);
2761 return 0;
2762 }
2763 if (chown(pty_name, uid, -1) < 0)
2764 warn("Couldn't change owner of pty slave: %m");
2765 if (chmod(pty_name, S_IRUSR | S_IWUSR) < 0)
2766 warn("Couldn't change permissions on pty slave: %m");
2767 if (unlockpt(mfd) < 0)
2768 warn("Couldn't unlock pty slave: %m");
2769
2770 sfd = open(pty_name, O_RDWR);
2771 if (sfd < 0) {
2772 error("Couldn't open pty slave %s: %m", pty_name);
2773 close(mfd);
2774 return 0;
2775 }
2776 if (ioctl(sfd, I_PUSH, "ptem") < 0)
2777 warn("Couldn't push ptem module on pty slave: %m");
2778
2779 dbglog("Using %s", pty_name);
2780 strlcpy(slave_name, pty_name, MAXPATHLEN);
2781 *master_fdp = mfd;
2782 *slave_fdp = sfd;
2783
2784 return 1;
2785 }
2786