Bug Summary

File:src/usr.sbin/npppd/npppd/ipcp.c
Warning:line 218, column 3
Value stored to 'rejbuf' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ipcp.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/usr.sbin/npppd/npppd/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/usr.sbin/npppd/npppd/../common -I /usr/src/usr.sbin/npppd/npppd -I /usr/src/usr.sbin/npppd/npppd/../pptp -I /usr/src/usr.sbin/npppd/npppd/../l2tp -I /usr/src/usr.sbin/npppd/npppd/../pppoe -D USE_NPPPD_PPTP -D USE_NPPPD_L2TP -D USE_NPPPD_PPPOE -D __COPYRIGHT(x)= -D __RCSID(x)= -D NPPPD_MAX_IFACE=8 -D NPPPD_MAX_POOL=8 -D USE_NPPPD_MPPE -D USE_NPPPD_PIPEX -D USE_NPPPD_RADIUS -D USE_SA_COOKIE -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.sbin/npppd/npppd/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/usr.sbin/npppd/npppd/ipcp.c
1/* $OpenBSD: ipcp.c,v 1.6 2019/02/27 04:52:19 denis Exp $ */
2
3/*-
4 * Copyright (c) 2009 Internet Initiative Japan Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28/**@file
29 * This is an implementation of IPCP. This code is currently implemented
30 * as network service provider, and the peer is forced to obey our proposal.
31 */
32/*
33 * RFC 1332, 1877
34 */
35/* $Id: ipcp.c,v 1.6 2019/02/27 04:52:19 denis Exp $ */
36#include <sys/types.h>
37#include <sys/socket.h>
38#include <sys/time.h>
39#include <netinet/in.h>
40#include <net/if_dl.h>
41#include <arpa/inet.h>
42#include <stdlib.h>
43#include <stdio.h>
44#include <syslog.h>
45#include <string.h>
46#include <event.h>
47
48#include "debugutil.h"
49#include "npppd.h"
50
51#ifdef IPCP_DEBUG
52#define IPCP_DBG(x) fsm_log x
53#define IPCP_ASSERT(x) ASSERT(x)((void)0);
54#else
55#define IPCP_DBG(x)
56#define IPCP_ASSERT(x)
57#endif
58
59
60#define IPCP_IP_ADDRESSES1 1
61#define IPCP_IP_COMP2 2
62#define IPCP_IP_ADDRESS3 3
63#define IPCP_PRI_DNS129 129 /* 0x81 */
64#define IPCP_PRI_NBNS130 130 /* 0x82 */
65#define IPCP_SEC_DNS131 131 /* 0x83 */
66#define IPCP_SEC_NBNS132 132 /* 0x84 */
67
68#define u32maskcmp(mask, a, b)(((a) & (mask)) == ((b) & (mask))) (((a) & (mask)) == ((b) & (mask)))
69
70static void ipcp_resetci (fsm *);
71static int ipcp_cilen (fsm *);
72static void ipcp_addci (fsm *, u_char *, int *);
73static int ipcp_ackci (fsm *, u_char *, int);
74static int ipcp_nakci (fsm *, u_char *, int);
75static int ipcp_rejci (fsm *, u_char *, int);
76static int ipcp_reqci (fsm *, u_char *, int *, int);
77static void ipcp_open (fsm *);
78static void ipcp_close (fsm *);
79static void ipcp_start (fsm *);
80static void ipcp_stop (fsm *);
81
82static struct fsm_callbacks ipcp_callbacks = {
83 ipcp_resetci, /* Reset our Configuration Information */
84 ipcp_cilen, /* Length of our Configuration Information */
85 ipcp_addci, /* Add our Configuration Information */
86 ipcp_ackci, /* ACK our Configuration Information */
87 ipcp_nakci, /* NAK our Configuration Information */
88 ipcp_rejci, /* Reject our Configuration Information */
89 ipcp_reqci, /* Request peer's Configuration Information */
90
91 ipcp_open, /* Called when fsm reaches OPENED state */
92 ipcp_close, /* Called when fsm leaves OPENED state */
93 ipcp_start, /* Called when we want the lower layer up */
94 ipcp_stop, /* Called when we want the lower layer down */
95 NULL((void *)0), /* Called when Protocol-Reject received */
96 NULL((void *)0), /* Retransmission is necessary */
97 NULL((void *)0), /* Called to handle LCP-specific codes */
98 "ipcp" /* String name of protocol */
99};
100
101/**
102 * Initialize {@link ::_ipcp IPCP instance }.
103 */
104void
105ipcp_init(ipcp *_this, npppd_ppp *ppp)
106{
107 struct tunnconf *conf;
108
109 memset(_this, 0, sizeof(ipcp));
110
111 _this->ppp = ppp;
112 _this->fsm.ppp = ppp;
113
114 fsm_init(&_this->fsm);
115
116 _this->fsm.callbacks = &ipcp_callbacks;
117 _this->fsm.protocol = PPP_PROTO_NCP0x8000 | NCP_IPCP0x21;
118
119 conf = ppp_get_tunnconf(ppp);
120 PPP_FSM_CONFIG(&_this->fsm, timeouttime, conf->ipcp_timeout)do { (&_this->fsm)->timeouttime = ((conf->ipcp_timeout
) == 0) ? (&_this->fsm)->timeouttime : (conf->ipcp_timeout
); } while (0 );
121 PPP_FSM_CONFIG(&_this->fsm, maxconfreqtransmits,do { (&_this->fsm)->maxconfreqtransmits = ((conf->
ipcp_max_configure) == 0) ? (&_this->fsm)->maxconfreqtransmits
: (conf->ipcp_max_configure); } while (0 )
122 conf->ipcp_max_configure)do { (&_this->fsm)->maxconfreqtransmits = ((conf->
ipcp_max_configure) == 0) ? (&_this->fsm)->maxconfreqtransmits
: (conf->ipcp_max_configure); } while (0 );
123 PPP_FSM_CONFIG(&_this->fsm, maxtermtransmits,do { (&_this->fsm)->maxtermtransmits = ((conf->ipcp_max_terminate
) == 0) ? (&_this->fsm)->maxtermtransmits : (conf->
ipcp_max_terminate); } while (0 )
124 conf->ipcp_max_terminate)do { (&_this->fsm)->maxtermtransmits = ((conf->ipcp_max_terminate
) == 0) ? (&_this->fsm)->maxtermtransmits : (conf->
ipcp_max_terminate); } while (0 );
125 PPP_FSM_CONFIG(&_this->fsm, maxnakloops,do { (&_this->fsm)->maxnakloops = ((conf->ipcp_max_nak_loop
) == 0) ? (&_this->fsm)->maxnakloops : (conf->ipcp_max_nak_loop
); } while (0 )
126 conf->ipcp_max_nak_loop)do { (&_this->fsm)->maxnakloops = ((conf->ipcp_max_nak_loop
) == 0) ? (&_this->fsm)->maxnakloops : (conf->ipcp_max_nak_loop
); } while (0 );
127}
128
129static void
130ipcp_resetci(fsm *f)
131{
132 IPCP_DBG((f, LOG_DEBUG, "%s", __func__));
133 if (npppd_prepare_ip(f->ppp->pppd, f->ppp) != 0) {
134 fsm_log(f, LOG_ERR3, "failed to assign ip address.");
135 ppp_stop(f->ppp, NULL((void *)0));
136 }
137}
138
139static int
140ipcp_cilen(fsm *f)
141{
142 IPCP_DBG((f, LOG_DEBUG, "%s", __func__));
143 return f->ppp->mru;
144}
145
146static void
147ipcp_addci(fsm *f, u_char *pktp, int *lpktp)
148{
149 u_char *pktp0;
150
151 IPCP_DBG((f, LOG_DEBUG, "%s", __func__));
152 pktp0 = pktp;
153
154 PUTCHAR(IPCP_IP_ADDRESS, pktp){ *(pktp)++ = (u_char) (3); };
155 PUTCHAR(6, pktp){ *(pktp)++ = (u_char) (6); };
156 memcpy(pktp, &f->ppp->ipcp.ip4_our.s_addr, 4);
157 pktp += 4;
158 *lpktp = pktp - pktp0;
159}
160
161
162static int
163ipcp_ackci(fsm *f, u_char *pktp, int lpkt)
164{
165 IPCP_DBG((f, LOG_DEBUG, "%s", __func__));
166 /* TODO */
167 return -1;
168}
169
170static int
171ipcp_nakci(fsm *f, u_char *pktp, int lpkt)
172{
173 IPCP_DBG((f, LOG_DEBUG, "%s", __func__));
174
175 fsm_log(f, LOG_INFO6, "Peer refused(ConfNak) our ip=%s.",
176 inet_ntoa(f->ppp->ipcp.ip4_our));
177 fsm_close(f, NULL((void *)0));
178 return -1;
179}
180
181static int
182ipcp_rejci(fsm *f, u_char *pktp, int lpkt)
183{
184 IPCP_DBG((f, LOG_DEBUG, "%s", __func__));
185
186 fsm_log(f, LOG_INFO6, "Peer refused(ConfRej) our ip=%s.",
187 inet_ntoa(f->ppp->ipcp.ip4_our));
188 fsm_close(f, NULL((void *)0));
189
190 return 0;
191}
192
193static int
194ipcp_reqci(fsm *f, u_char *pktp, int *lpktp, int reject_if_disagree)
195{
196 int type, len, rcode, lrej, lnak;
197 u_char rejbuf0[256], nakbuf0[256], *nakbuf, *rejbuf, *pktp0;
198 char buf0[256];
199 struct in_addr ip_addr, *ip_addrp;
200 npppd_ppp *ppp;
201 npppd *_npppd;
202 int ip_address_acked = 0;
203
204 IPCP_DBG((f, LOG_DEBUG, "%s(reject_if_disagree=%d, nakloops=%d)",
205 __func__, reject_if_disagree, f->nakloops));
206 ppp = f->ppp;
207 _npppd = ppp->pppd;
208
209 nakbuf = nakbuf0;
210 rejbuf = rejbuf0;
211 lrej = 0;
212 lnak = 0;
213 pktp0 = pktp;
214 rcode = -1;
215
216 if (*lpktp > 128) {
217 rcode = CONFREJ4;
218 rejbuf = pktp;
Value stored to 'rejbuf' is never read
219 lrej = *lpktp;
220 goto fail;
221 }
222
223#define remlen() (*lpktp - (pktp - pktp0))
224
225 ip_address_acked = 0;
226 while (remlen() >= 2) {
227 GETCHAR(type, pktp){ (type) = *(pktp)++; };
228 GETCHAR(len, pktp){ (len) = *(pktp)++; };
229 if (len <= 0 || remlen() + 2 < len)
230 goto fail;
231
232 switch (type) {
233 case IPCP_IP_ADDRESS3:
234 case IPCP_PRI_DNS129:
235 case IPCP_PRI_NBNS130:
236 case IPCP_SEC_DNS131:
237 case IPCP_SEC_NBNS132:
238 if (remlen() < 4)
239 goto fail;
240 GETLONG(ip_addr.s_addr, pktp){ (ip_addr.s_addr) = *(pktp)++ << 8; (ip_addr.s_addr) |=
*(pktp)++; (ip_addr.s_addr) <<= 8; (ip_addr.s_addr) |=
*(pktp)++; (ip_addr.s_addr) <<= 8; (ip_addr.s_addr) |=
*(pktp)++; };
241 ip_addr.s_addr = htonl(ip_addr.s_addr)(__uint32_t)(__builtin_constant_p(ip_addr.s_addr) ? (__uint32_t
)(((__uint32_t)(ip_addr.s_addr) & 0xff) << 24 | ((__uint32_t
)(ip_addr.s_addr) & 0xff00) << 8 | ((__uint32_t)(ip_addr
.s_addr) & 0xff0000) >> 8 | ((__uint32_t)(ip_addr.s_addr
) & 0xff000000) >> 24) : __swap32md(ip_addr.s_addr)
);
242
243 switch (type) {
244 case IPCP_IP_ADDRESS3:
245 if (!ppp_ip_assigned(ppp)(ppp->snp.sin4.sin_addr.s_addr != 0)) {
246 if (npppd_assign_ip_addr(ppp->pppd, ppp,
247 htonl(ip_addr.s_addr)(__uint32_t)(__builtin_constant_p(ip_addr.s_addr) ? (__uint32_t
)(((__uint32_t)(ip_addr.s_addr) & 0xff) << 24 | ((__uint32_t
)(ip_addr.s_addr) & 0xff00) << 8 | ((__uint32_t)(ip_addr
.s_addr) & 0xff0000) >> 8 | ((__uint32_t)(ip_addr.s_addr
) & 0xff000000) >> 24) : __swap32md(ip_addr.s_addr)
)) != 0 &&
248 npppd_assign_ip_addr(ppp->pppd, ppp,
249 INADDR_ANY((u_int32_t)(0x00000000))) != 0) {
250 /*
251 * The reason why it call with INADDR_ANY again here
252 * is to adapt the client expecting to fall back into
253 * dynamic allocation when user-select is allowed.
254 */
255 pktp -= 4;
256 goto do_reject;
257 }
258 strlcpy(buf0, inet_ntoa(ip_addr),
259 sizeof(buf0));
260 fsm_log(f, LOG_INFO6,
261 "IP Address peer=%s our=%s.", buf0,
262 inet_ntoa(
263 ppp->ppp_framed_ip_addresssnp.sin4.sin_addr));
264 }
265
266 if (u32maskcmp(ppp->ppp_framed_ip_netmask(((ip_addr.s_addr) & (ppp->snp.sin4mask.sin_addr .s_addr
)) == ((ppp->snp.sin4.sin_addr.s_addr) & (ppp->snp.
sin4mask.sin_addr .s_addr)))
267 .s_addr, ip_addr.s_addr,(((ip_addr.s_addr) & (ppp->snp.sin4mask.sin_addr .s_addr
)) == ((ppp->snp.sin4.sin_addr.s_addr) & (ppp->snp.
sin4mask.sin_addr .s_addr)))
268 ppp->ppp_framed_ip_address.s_addr)(((ip_addr.s_addr) & (ppp->snp.sin4mask.sin_addr .s_addr
)) == ((ppp->snp.sin4.sin_addr.s_addr) & (ppp->snp.
sin4mask.sin_addr .s_addr)))) {
269 /*
270 * In case of assigning network address, it obey
271 * peer's proposal if peer's IP-Address Option is
272 * included in network address to assign.
273 */
274 ip_addrp = &ip_addr;
275 } else {
276 ip_addrp = &ppp->
277 ppp_framed_ip_addresssnp.sin4.sin_addr;
278 }
279 ip_address_acked = 1;
280 break;
281 case IPCP_PRI_DNS129:
282 ip_addrp = &ppp->ipcp.dns_pri; break;
283 case IPCP_SEC_DNS131:
284 ip_addrp = &ppp->ipcp.dns_sec; break;
285 case IPCP_PRI_NBNS130:
286 ip_addrp = &ppp->ipcp.nbns_pri; break;
287 case IPCP_SEC_NBNS132:
288 ip_addrp = &ppp->ipcp.nbns_sec; break;
289 default:
290 ip_addrp = NULL((void *)0);
291 }
292
293 if (ip_addrp == NULL((void *)0) ||
294 ip_addrp->s_addr == INADDR_NONE((u_int32_t)(0xffffffff))) {
295 pktp -= 4;
296 goto do_reject;
297 }
298 if (ip_addrp->s_addr != ip_addr.s_addr) {
299 if (reject_if_disagree) {
300 pktp -= 4;
301 goto do_reject;
302 }
303 if (lrej > 0) {
304 /* if there is a reject, will send Rej, not send Nak. */
305 } else {
306 PUTCHAR(type, nakbuf){ *(nakbuf)++ = (u_char) (type); };
307 PUTCHAR(6, nakbuf){ *(nakbuf)++ = (u_char) (6); };
308 PUTLONG(ntohl(ip_addrp->s_addr),{ *(nakbuf)++ = (u_char) (((__uint32_t)(__builtin_constant_p(
ip_addrp->s_addr) ? (__uint32_t)(((__uint32_t)(ip_addrp->
s_addr) & 0xff) << 24 | ((__uint32_t)(ip_addrp->
s_addr) & 0xff00) << 8 | ((__uint32_t)(ip_addrp->
s_addr) & 0xff0000) >> 8 | ((__uint32_t)(ip_addrp->
s_addr) & 0xff000000) >> 24) : __swap32md(ip_addrp->
s_addr))) >> 24); *(nakbuf)++ = (u_char) (((__uint32_t)
(__builtin_constant_p(ip_addrp->s_addr) ? (__uint32_t)(((__uint32_t
)(ip_addrp->s_addr) & 0xff) << 24 | ((__uint32_t
)(ip_addrp->s_addr) & 0xff00) << 8 | ((__uint32_t
)(ip_addrp->s_addr) & 0xff0000) >> 8 | ((__uint32_t
)(ip_addrp->s_addr) & 0xff000000) >> 24) : __swap32md
(ip_addrp->s_addr))) >> 16); *(nakbuf)++ = (u_char) (
((__uint32_t)(__builtin_constant_p(ip_addrp->s_addr) ? (__uint32_t
)(((__uint32_t)(ip_addrp->s_addr) & 0xff) << 24 |
((__uint32_t)(ip_addrp->s_addr) & 0xff00) << 8 |
((__uint32_t)(ip_addrp->s_addr) & 0xff0000) >> 8
| ((__uint32_t)(ip_addrp->s_addr) & 0xff000000) >>
24) : __swap32md(ip_addrp->s_addr))) >> 8); *(nakbuf
)++ = (u_char) ((__uint32_t)(__builtin_constant_p(ip_addrp->
s_addr) ? (__uint32_t)(((__uint32_t)(ip_addrp->s_addr) &
0xff) << 24 | ((__uint32_t)(ip_addrp->s_addr) &
0xff00) << 8 | ((__uint32_t)(ip_addrp->s_addr) &
0xff0000) >> 8 | ((__uint32_t)(ip_addrp->s_addr) &
0xff000000) >> 24) : __swap32md(ip_addrp->s_addr)))
; }
309 nakbuf){ *(nakbuf)++ = (u_char) (((__uint32_t)(__builtin_constant_p(
ip_addrp->s_addr) ? (__uint32_t)(((__uint32_t)(ip_addrp->
s_addr) & 0xff) << 24 | ((__uint32_t)(ip_addrp->
s_addr) & 0xff00) << 8 | ((__uint32_t)(ip_addrp->
s_addr) & 0xff0000) >> 8 | ((__uint32_t)(ip_addrp->
s_addr) & 0xff000000) >> 24) : __swap32md(ip_addrp->
s_addr))) >> 24); *(nakbuf)++ = (u_char) (((__uint32_t)
(__builtin_constant_p(ip_addrp->s_addr) ? (__uint32_t)(((__uint32_t
)(ip_addrp->s_addr) & 0xff) << 24 | ((__uint32_t
)(ip_addrp->s_addr) & 0xff00) << 8 | ((__uint32_t
)(ip_addrp->s_addr) & 0xff0000) >> 8 | ((__uint32_t
)(ip_addrp->s_addr) & 0xff000000) >> 24) : __swap32md
(ip_addrp->s_addr))) >> 16); *(nakbuf)++ = (u_char) (
((__uint32_t)(__builtin_constant_p(ip_addrp->s_addr) ? (__uint32_t
)(((__uint32_t)(ip_addrp->s_addr) & 0xff) << 24 |
((__uint32_t)(ip_addrp->s_addr) & 0xff00) << 8 |
((__uint32_t)(ip_addrp->s_addr) & 0xff0000) >> 8
| ((__uint32_t)(ip_addrp->s_addr) & 0xff000000) >>
24) : __swap32md(ip_addrp->s_addr))) >> 8); *(nakbuf
)++ = (u_char) ((__uint32_t)(__builtin_constant_p(ip_addrp->
s_addr) ? (__uint32_t)(((__uint32_t)(ip_addrp->s_addr) &
0xff) << 24 | ((__uint32_t)(ip_addrp->s_addr) &
0xff00) << 8 | ((__uint32_t)(ip_addrp->s_addr) &
0xff0000) >> 8 | ((__uint32_t)(ip_addrp->s_addr) &
0xff000000) >> 24) : __swap32md(ip_addrp->s_addr)))
; };
310 lnak += 6;
311 rcode = CONFNAK3;
312 }
313 }
314 break;
315 case IPCP_IP_COMP2:
316 case IPCP_IP_ADDRESSES1:
317 default:
318 fsm_log(f, LOG_DEBUG7, "Unhandled Option %02x %d", type,
319 len);
320do_reject:
321 pktp -= 2;
322 memmove(rejbuf + lrej, pktp, len);
323 lrej += len;
324 pktp += len;
325 rcode = CONFREJ4;
326 }
327 continue;
328 }
329 if (rcode == -1)
330 rcode = CONFACK2;
331
332fail:
333 switch (rcode) {
334 case CONFREJ4:
335 IPCP_DBG((f, LOG_DEBUG, "SendConfRej"));
336 memmove(pktp0, rejbuf0, lrej);
337 *lpktp = lrej;
338 break;
339 case CONFNAK3:
340 /*
341 * In case of Yamaha router is set "pp ppp ipcp ip-address off",
342 * it sends ConfReq without IP-Address Option.
343 * To quote RFC 1332:
344 * If negotiation about the remote IP-address is required, and
345 * the peer did not provide the option in its Configure-Request,
346 * the option SHOULD be appended to a Configure-Nak.
347 *
348 * Is any problem of overrunning 6 bytes of lpkt?
349 * - In ppp.c, lpkt is allocated mru + 64 bytes. lpkt is less
350 * than mru, so +6 is enough.
351 */
352 if (!ip_address_acked) {
353 /* It is mandatory to assign IP address. */
354 if (!ppp_ip_assigned(ppp)(ppp->snp.sin4.sin_addr.s_addr != 0)) {
355 if (npppd_assign_ip_addr(ppp->pppd, ppp,
356 INADDR_ANY((u_int32_t)(0x00000000))) != 0) {
357 /* The log already put in npppd_assign_ip_addr(). */
358 }
359 }
360 PUTCHAR(IPCP_IP_ADDRESS, nakbuf){ *(nakbuf)++ = (u_char) (3); };
361 PUTCHAR(6, nakbuf){ *(nakbuf)++ = (u_char) (6); };
362 PUTLONG(ntohl(ppp->ppp_framed_ip_address.s_addr),{ *(nakbuf)++ = (u_char) (((__uint32_t)(__builtin_constant_p(
ppp->snp.sin4.sin_addr.s_addr) ? (__uint32_t)(((__uint32_t
)(ppp->snp.sin4.sin_addr.s_addr) & 0xff) << 24 |
((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr) & 0xff00
) << 8 | ((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr
) & 0xff0000) >> 8 | ((__uint32_t)(ppp->snp.sin4
.sin_addr.s_addr) & 0xff000000) >> 24) : __swap32md
(ppp->snp.sin4.sin_addr.s_addr))) >> 24); *(nakbuf)++
= (u_char) (((__uint32_t)(__builtin_constant_p(ppp->snp.sin4
.sin_addr.s_addr) ? (__uint32_t)(((__uint32_t)(ppp->snp.sin4
.sin_addr.s_addr) & 0xff) << 24 | ((__uint32_t)(ppp
->snp.sin4.sin_addr.s_addr) & 0xff00) << 8 | ((__uint32_t
)(ppp->snp.sin4.sin_addr.s_addr) & 0xff0000) >> 8
| ((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr) & 0xff000000
) >> 24) : __swap32md(ppp->snp.sin4.sin_addr.s_addr)
)) >> 16); *(nakbuf)++ = (u_char) (((__uint32_t)(__builtin_constant_p
(ppp->snp.sin4.sin_addr.s_addr) ? (__uint32_t)(((__uint32_t
)(ppp->snp.sin4.sin_addr.s_addr) & 0xff) << 24 |
((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr) & 0xff00
) << 8 | ((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr
) & 0xff0000) >> 8 | ((__uint32_t)(ppp->snp.sin4
.sin_addr.s_addr) & 0xff000000) >> 24) : __swap32md
(ppp->snp.sin4.sin_addr.s_addr))) >> 8); *(nakbuf)++
= (u_char) ((__uint32_t)(__builtin_constant_p(ppp->snp.sin4
.sin_addr.s_addr) ? (__uint32_t)(((__uint32_t)(ppp->snp.sin4
.sin_addr.s_addr) & 0xff) << 24 | ((__uint32_t)(ppp
->snp.sin4.sin_addr.s_addr) & 0xff00) << 8 | ((__uint32_t
)(ppp->snp.sin4.sin_addr.s_addr) & 0xff0000) >> 8
| ((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr) & 0xff000000
) >> 24) : __swap32md(ppp->snp.sin4.sin_addr.s_addr)
)); }
363 nakbuf){ *(nakbuf)++ = (u_char) (((__uint32_t)(__builtin_constant_p(
ppp->snp.sin4.sin_addr.s_addr) ? (__uint32_t)(((__uint32_t
)(ppp->snp.sin4.sin_addr.s_addr) & 0xff) << 24 |
((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr) & 0xff00
) << 8 | ((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr
) & 0xff0000) >> 8 | ((__uint32_t)(ppp->snp.sin4
.sin_addr.s_addr) & 0xff000000) >> 24) : __swap32md
(ppp->snp.sin4.sin_addr.s_addr))) >> 24); *(nakbuf)++
= (u_char) (((__uint32_t)(__builtin_constant_p(ppp->snp.sin4
.sin_addr.s_addr) ? (__uint32_t)(((__uint32_t)(ppp->snp.sin4
.sin_addr.s_addr) & 0xff) << 24 | ((__uint32_t)(ppp
->snp.sin4.sin_addr.s_addr) & 0xff00) << 8 | ((__uint32_t
)(ppp->snp.sin4.sin_addr.s_addr) & 0xff0000) >> 8
| ((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr) & 0xff000000
) >> 24) : __swap32md(ppp->snp.sin4.sin_addr.s_addr)
)) >> 16); *(nakbuf)++ = (u_char) (((__uint32_t)(__builtin_constant_p
(ppp->snp.sin4.sin_addr.s_addr) ? (__uint32_t)(((__uint32_t
)(ppp->snp.sin4.sin_addr.s_addr) & 0xff) << 24 |
((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr) & 0xff00
) << 8 | ((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr
) & 0xff0000) >> 8 | ((__uint32_t)(ppp->snp.sin4
.sin_addr.s_addr) & 0xff000000) >> 24) : __swap32md
(ppp->snp.sin4.sin_addr.s_addr))) >> 8); *(nakbuf)++
= (u_char) ((__uint32_t)(__builtin_constant_p(ppp->snp.sin4
.sin_addr.s_addr) ? (__uint32_t)(((__uint32_t)(ppp->snp.sin4
.sin_addr.s_addr) & 0xff) << 24 | ((__uint32_t)(ppp
->snp.sin4.sin_addr.s_addr) & 0xff00) << 8 | ((__uint32_t
)(ppp->snp.sin4.sin_addr.s_addr) & 0xff0000) >> 8
| ((__uint32_t)(ppp->snp.sin4.sin_addr.s_addr) & 0xff000000
) >> 24) : __swap32md(ppp->snp.sin4.sin_addr.s_addr)
)); };
364 lnak += 6;
365 }
366 IPCP_DBG((f, LOG_DEBUG, "SendConfNak"));
367 memmove(pktp0, nakbuf0, lnak);
368 *lpktp = lnak;
369 break;
370 case CONFACK2:
371 IPCP_DBG((f, LOG_DEBUG, "SendConfAck"));
372 break;
373 }
374
375 return rcode;
376#undef remlen
377}
378
379static void
380ipcp_open(fsm *f)
381{
382 if (!ppp_ip_assigned(f->ppp)(f->ppp->snp.sin4.sin_addr.s_addr != 0)) {
383 fsm_log(f, LOG_INFO6, "the ip-address option from the peer was "
384 "not agreed.");
385 /*
386 * agreed without IP-Address Option. try to assign static address.
387 */
388 if (f->ppp->realm_framed_ip_address.s_addr
389 != INADDR_USER_SELECT((__uint32_t)(__builtin_constant_p(0xFFFFFFFFL) ? (__uint32_t
)(((__uint32_t)(0xFFFFFFFFL) & 0xff) << 24 | ((__uint32_t
)(0xFFFFFFFFL) & 0xff00) << 8 | ((__uint32_t)(0xFFFFFFFFL
) & 0xff0000) >> 8 | ((__uint32_t)(0xFFFFFFFFL) &
0xff000000) >> 24) : __swap32md(0xFFFFFFFFL))) &&
390 f->ppp->realm_framed_ip_address.s_addr
391 != INADDR_NAS_SELECT((__uint32_t)(__builtin_constant_p(0xFFFFFFFEL) ? (__uint32_t
)(((__uint32_t)(0xFFFFFFFEL) & 0xff) << 24 | ((__uint32_t
)(0xFFFFFFFEL) & 0xff00) << 8 | ((__uint32_t)(0xFFFFFFFEL
) & 0xff0000) >> 8 | ((__uint32_t)(0xFFFFFFFEL) &
0xff000000) >> 24) : __swap32md(0xFFFFFFFEL))) &&
392 f->ppp->realm_framed_ip_address.s_addr != 0) {
393 npppd_assign_ip_addr(f->ppp->pppd, f->ppp, INADDR_ANY((u_int32_t)(0x00000000)));
394 }
395 }
396 if (!ppp_ip_assigned(f->ppp)(f->ppp->snp.sin4.sin_addr.s_addr != 0)) {
397 fsm_log(f, LOG_NOTICE5,
398 "IPCP opened but no IP address for the peer.");
399 ppp_stop(f->ppp, NULL((void *)0));
400 return;
401 }
402
403 fsm_log(f, LOG_INFO6, "logtype=Opened ip=%s assignType=%s",
404 inet_ntoa(f->ppp->ppp_framed_ip_addresssnp.sin4.sin_addr),
405 (f->ppp->assign_dynapool)? "dynamic" : "static");
406
407 ppp_ipcp_opened(f->ppp);
408}
409
410static void
411ipcp_close(fsm *f)
412{
413 IPCP_DBG((f, LOG_DEBUG, "%s", __func__));
414}
415
416static void
417ipcp_start(fsm *f)
418{
419}
420
421static void
422ipcp_stop(fsm *f)
423{
424 fsm_log(f, LOG_INFO6, "IPCP is stopped");
425 ppp_stop(f->ppp, NULL((void *)0));
426}