| File: | src/usr.sbin/iscsid/util.c |
| Warning: | line 120, column 7 Although the value stored to 'flags' is used in the enclosing expression, the value is never actually read from 'flags' |
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| 1 | /* $OpenBSD: util.c,v 1.9 2021/04/12 10:03:33 claudio Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2009 Claudio Jeker <claudio@openbsd.org> |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | #include <sys/queue.h> |
| 20 | #include <sys/socket.h> |
| 21 | #include <sys/uio.h> |
| 22 | |
| 23 | #include <scsi/iscsi.h> |
| 24 | |
| 25 | #include <errno(*__errno()).h> |
| 26 | #include <event.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <netdb.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | #include <unistd.h> |
| 33 | |
| 34 | #include "iscsid.h" |
| 35 | #include "log.h" |
| 36 | |
| 37 | struct pdu * |
| 38 | pdu_new(void) |
| 39 | { |
| 40 | struct pdu *p; |
| 41 | |
| 42 | if (!(p = calloc(1, sizeof(*p)))) |
| 43 | return NULL((void *)0); |
| 44 | return p; |
| 45 | } |
| 46 | |
| 47 | void * |
| 48 | pdu_alloc(size_t len) |
| 49 | { |
| 50 | return malloc(PDU_LEN(len)((((len) + 3) / 4) * 4)); |
| 51 | } |
| 52 | |
| 53 | void * |
| 54 | pdu_dup(void *data, size_t len) |
| 55 | { |
| 56 | void *p; |
| 57 | |
| 58 | if ((p = malloc(PDU_LEN(len)((((len) + 3) / 4) * 4)))) |
| 59 | memcpy(p, data, len); |
| 60 | return p; |
| 61 | } |
| 62 | |
| 63 | int |
| 64 | pdu_addbuf(struct pdu *p, void *buf, size_t len, unsigned int elm) |
| 65 | { |
| 66 | if (len & 0x3) { |
| 67 | bzero((char *)buf + len, 4 - (len & 0x3)); |
| 68 | len += 4 - (len & 0x3); |
| 69 | } |
| 70 | |
| 71 | if (elm < PDU_MAXIOV5) |
| 72 | if (!p->iov[elm].iov_base) { |
| 73 | p->iov[elm].iov_base = buf; |
| 74 | p->iov[elm].iov_len = len; |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | /* no space left */ |
| 79 | return -1; |
| 80 | } |
| 81 | |
| 82 | void * |
| 83 | pdu_getbuf(struct pdu *p, size_t *len, unsigned int elm) |
| 84 | { |
| 85 | if (len) |
| 86 | *len = 0; |
| 87 | if (elm < PDU_MAXIOV5) |
| 88 | if (p->iov[elm].iov_base) { |
| 89 | if (len) |
| 90 | *len = p->iov[elm].iov_len; |
| 91 | return p->iov[elm].iov_base; |
| 92 | } |
| 93 | |
| 94 | return NULL((void *)0); |
| 95 | } |
| 96 | |
| 97 | void |
| 98 | pdu_free(struct pdu *p) |
| 99 | { |
| 100 | unsigned int j; |
| 101 | |
| 102 | for (j = 0; j < PDU_MAXIOV5; j++) |
| 103 | free(p->iov[j].iov_base); |
| 104 | free(p); |
| 105 | } |
| 106 | |
| 107 | int |
| 108 | socket_setblockmode(int fd, int nonblocking) |
| 109 | { |
| 110 | int flags; |
| 111 | |
| 112 | if ((flags = fcntl(fd, F_GETFL3)) == -1) |
| 113 | return -1; |
| 114 | |
| 115 | if (nonblocking) |
| 116 | flags |= O_NONBLOCK0x0004; |
| 117 | else |
| 118 | flags &= ~O_NONBLOCK0x0004; |
| 119 | |
| 120 | if ((flags = fcntl(fd, F_SETFL4, flags)) == -1) |
Although the value stored to 'flags' is used in the enclosing expression, the value is never actually read from 'flags' | |
| 121 | return -1; |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | const char * |
| 126 | log_sockaddr(void *arg) |
| 127 | { |
| 128 | struct sockaddr *sa = arg; |
| 129 | char port[6]; |
| 130 | char host[NI_MAXHOST256]; |
| 131 | static char buf[NI_MAXHOST256 + 8]; |
| 132 | |
| 133 | if (getnameinfo(sa, sa->sa_len, host, sizeof(host), port, sizeof(port), |
| 134 | NI_NUMERICHOST1)) |
| 135 | return "unknown"; |
| 136 | if (port[0] == '0') |
| 137 | strlcpy(buf, host, sizeof(buf)); |
| 138 | else if (sa->sa_family == AF_INET2) |
| 139 | snprintf(buf, sizeof(buf), "%s:%s", host, port); |
| 140 | else |
| 141 | snprintf(buf, sizeof(buf), "[%s]:%s", host, port); |
| 142 | return buf; |
| 143 | } |
| 144 | |
| 145 | int |
| 146 | control_compose(void *ch, u_int16_t type, void *buf, size_t len) |
| 147 | { |
| 148 | return control_build(ch, type, 1, CTRLARGV({ buf, len })((struct ctrldata []){ { buf, len } })); |
| 149 | } |
| 150 | |
| 151 | int |
| 152 | control_build(void *ch, u_int16_t type, int argc, struct ctrldata *argv) |
| 153 | { |
| 154 | struct pdu *pdu; |
| 155 | struct ctrlmsghdr *cmh; |
| 156 | size_t size = 0; |
| 157 | int i; |
| 158 | |
| 159 | if (argc > (int)nitems(cmh->len)(sizeof((cmh->len)) / sizeof((cmh->len)[0]))) |
| 160 | return -1; |
| 161 | |
| 162 | for (i = 0; i < argc; i++) |
| 163 | size += argv[i].len; |
| 164 | if (PDU_LEN(size)((((size) + 3) / 4) * 4) > CONTROL_READ_SIZE8192 - PDU_LEN(sizeof(*cmh))((((sizeof(*cmh)) + 3) / 4) * 4)) |
| 165 | return -1; |
| 166 | |
| 167 | if ((pdu = pdu_new()) == NULL((void *)0)) |
| 168 | return -1; |
| 169 | if ((cmh = pdu_alloc(sizeof(*cmh))) == NULL((void *)0)) |
| 170 | goto fail; |
| 171 | bzero(cmh, sizeof(*cmh)); |
| 172 | cmh->type = type; |
| 173 | pdu_addbuf(pdu, cmh, sizeof(*cmh), 0); |
| 174 | |
| 175 | for (i = 0; i < argc; i++) |
| 176 | if (argv[i].len > 0) { |
| 177 | void *ptr; |
| 178 | |
| 179 | cmh->len[i] = argv[i].len; |
| 180 | if ((ptr = pdu_alloc(argv[i].len)) == NULL((void *)0)) |
| 181 | goto fail; |
| 182 | memcpy(ptr, argv[i].buf, argv[i].len); |
| 183 | pdu_addbuf(pdu, ptr, argv[i].len, i + 1); |
| 184 | } |
| 185 | |
| 186 | control_queue(ch, pdu); |
| 187 | return 0; |
| 188 | fail: |
| 189 | pdu_free(pdu); |
| 190 | return -1; |
| 191 | } |