| File: | src/usr.sbin/mopd/mopd/../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 | } |