File: | src/usr.sbin/mopd/moptrace/../common/loop-bsd.c |
Warning: | line 102, column 8 1st function call argument is an uninitialized value |
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1 | /* $OpenBSD: loop-bsd.c,v 1.14 2021/01/26 18:25:07 deraadt Exp $ */ | |||
2 | ||||
3 | /* | |||
4 | * Copyright (c) 1993-95 Mats O Jansson. All rights reserved. | |||
5 | * | |||
6 | * Redistribution and use in source and binary forms, with or without | |||
7 | * modification, are permitted provided that the following conditions | |||
8 | * are met: | |||
9 | * 1. Redistributions of source code must retain the above copyright | |||
10 | * notice, this list of conditions and the following disclaimer. | |||
11 | * 2. Redistributions in binary form must reproduce the above copyright | |||
12 | * notice, this list of conditions and the following disclaimer in the | |||
13 | * documentation and/or other materials provided with the distribution. | |||
14 | * | |||
15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |||
16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |||
17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |||
18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |||
19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |||
20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |||
21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |||
22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |||
23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |||
24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |||
25 | */ | |||
26 | ||||
27 | #include <errno(*__errno()).h> | |||
28 | #include <stdlib.h> | |||
29 | #include <string.h> | |||
30 | #include <unistd.h> | |||
31 | #if defined(__bsdi__) || defined(__FreeBSD__) | |||
32 | #include <sys/time.h> | |||
33 | #endif | |||
34 | #include <net/bpf.h> | |||
35 | #include <sys/ioctl.h> | |||
36 | ||||
37 | #include "os.h" | |||
38 | #include "common/common.h" | |||
39 | #include "common/mopdef.h" | |||
40 | ||||
41 | int | |||
42 | mopOpenRC(struct if_info *p, int trans) | |||
43 | { | |||
44 | #ifndef NORC | |||
45 | return (*(p->iopen))(p->if_name, O_RDWR0x0002, MOP_K_PROTO_RC0x6002, trans); | |||
46 | #else | |||
47 | return (-1); | |||
48 | #endif | |||
49 | } | |||
50 | ||||
51 | int | |||
52 | mopOpenDL(struct if_info *p, int trans) | |||
53 | { | |||
54 | #ifndef NODL | |||
55 | return (*(p->iopen))(p->if_name, O_RDWR0x0002, MOP_K_PROTO_DL0x6001, trans); | |||
56 | #else | |||
57 | return (-1); | |||
58 | #endif | |||
59 | } | |||
60 | ||||
61 | void | |||
62 | mopReadRC(void) | |||
63 | { | |||
64 | } | |||
65 | ||||
66 | void | |||
67 | mopReadDL(void) | |||
68 | { | |||
69 | } | |||
70 | ||||
71 | /* | |||
72 | * The list of all interfaces that are being listened to. loop() | |||
73 | * "selects" on the descriptors in this list. | |||
74 | */ | |||
75 | extern struct if_info *iflist; | |||
76 | ||||
77 | void mopProcess(struct if_info *, u_char *); | |||
78 | ||||
79 | /* | |||
80 | * Loop indefinitely listening for MOP requests on the | |||
81 | * interfaces in 'iflist'. | |||
82 | */ | |||
83 | void | |||
84 | Loop(void) | |||
85 | { | |||
86 | u_char *buf, *bp, *ep; | |||
87 | int cc; | |||
88 | fd_set fds, listeners; | |||
89 | int bufsize, maxfd = 0; | |||
| ||||
90 | struct if_info *ii; | |||
91 | ||||
92 | if (iflist == 0) { | |||
93 | syslog(LOG_ERR3, "no interfaces"); | |||
94 | exit(0); | |||
95 | } | |||
96 | if (iflist->fd != -1) | |||
97 | if (ioctl(iflist->fd, BIOCGBLEN((unsigned long)0x40000000 | ((sizeof(u_int) & 0x1fff) << 16) | ((('B')) << 8) | ((102))), (caddr_t)&bufsize) < 0) { | |||
98 | syslog(LOG_ERR3, "BIOCGBLEN: %m"); | |||
99 | exit(0); | |||
100 | } | |||
101 | ||||
102 | buf = malloc(bufsize); | |||
| ||||
103 | if (buf == 0) { | |||
104 | syslog(LOG_ERR3, "malloc: %m"); | |||
105 | exit(0); | |||
106 | } | |||
107 | /* | |||
108 | * Find the highest numbered file descriptor for select(). | |||
109 | * Initialize the set of descriptors to listen to. | |||
110 | */ | |||
111 | FD_ZERO(&fds)do { fd_set *_p = (&fds); __size_t _n = (((1024) + ((((unsigned )(sizeof(__fd_mask) * 8))) - 1)) / (((unsigned)(sizeof(__fd_mask ) * 8)))); while (_n > 0) _p->fds_bits[--_n] = 0; } while (0); | |||
112 | for (ii = iflist; ii; ii = ii->next) | |||
113 | if (ii->fd != -1) { | |||
114 | FD_SET(ii->fd, &fds)__fd_set((ii->fd), (&fds)); | |||
115 | if (ii->fd > maxfd) | |||
116 | maxfd = ii->fd; | |||
117 | } | |||
118 | ||||
119 | while (1) { | |||
120 | listeners = fds; | |||
121 | if (select(maxfd + 1, &listeners, NULL((void *)0), NULL((void *)0), NULL((void *)0)) < 0) { | |||
122 | syslog(LOG_ERR3, "select: %m"); | |||
123 | exit(0); | |||
124 | } | |||
125 | for (ii = iflist; ii; ii = ii->next) | |||
126 | if (ii->fd != -1) { | |||
127 | if (!FD_ISSET(ii->fd, &listeners)__fd_isset((ii->fd), (&listeners))) | |||
128 | continue; | |||
129 | again: | |||
130 | cc = read(ii->fd, buf, bufsize); | |||
131 | /* Don't choke when we get ptraced */ | |||
132 | if (cc < 0 && errno(*__errno()) == EINTR4) | |||
133 | goto again; | |||
134 | /* Due to a SunOS bug, after 2^31 bytes, the file | |||
135 | * offset overflows and read fails with EINVAL. The | |||
136 | * lseek() to 0 will fix things. */ | |||
137 | if (cc < 0) { | |||
138 | if (errno(*__errno()) == EINVAL22 && (lseek(ii->fd, 0, | |||
139 | SEEK_CUR1) + bufsize) < 0) { | |||
140 | lseek(ii->fd, 0, SEEK_SET0); | |||
141 | goto again; | |||
142 | } | |||
143 | syslog(LOG_ERR3, "read: %m"); | |||
144 | exit(0); | |||
145 | } | |||
146 | /* Loop through the packet(s) */ | |||
147 | #define bhp((struct bpf_hdr *)bp) ((struct bpf_hdr *)bp) | |||
148 | bp = buf; | |||
149 | ep = bp + cc; | |||
150 | while (bp < ep) { | |||
151 | int caplen, hdrlen; | |||
152 | ||||
153 | caplen = bhp((struct bpf_hdr *)bp)->bh_caplen; | |||
154 | hdrlen = bhp((struct bpf_hdr *)bp)->bh_hdrlen; | |||
155 | mopProcess(ii, bp + hdrlen); | |||
156 | bp += BPF_WORDALIGN(hdrlen + caplen)(((hdrlen + caplen) + (sizeof(u_int32_t) - 1)) & ~(sizeof (u_int32_t) - 1)); | |||
157 | } | |||
158 | } | |||
159 | } | |||
160 | } |