diff options
author | Luke Shumaker <lukeshu@lukeshu.com> | 2017-05-20 17:35:06 -0400 |
---|---|---|
committer | Luke Shumaker <lukeshu@lukeshu.com> | 2017-05-20 17:35:06 -0400 |
commit | f2f1f2472c5efc541bd53f51289ad58a86fa2d41 (patch) | |
tree | 42807ddc64ab0672744c716d9f952e5673762b9d /src/libsystemd-network/dhcp-option.c | |
parent | 3eed542bbc10978aa0b68a39dd3619edf7a7d90b (diff) |
./tools/notsd-move
Diffstat (limited to 'src/libsystemd-network/dhcp-option.c')
-rw-r--r-- | src/libsystemd-network/dhcp-option.c | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/src/libsystemd-network/dhcp-option.c b/src/libsystemd-network/dhcp-option.c deleted file mode 100644 index c105196334..0000000000 --- a/src/libsystemd-network/dhcp-option.c +++ /dev/null @@ -1,263 +0,0 @@ -/*** - This file is part of systemd. - - Copyright (C) 2013 Intel Corporation. All rights reserved. - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <stdint.h> -#include <stdio.h> -#include <string.h> - -#include "alloc-util.h" -#include "utf8.h" - -#include "dhcp-internal.h" - -static int option_append(uint8_t options[], size_t size, size_t *offset, - uint8_t code, size_t optlen, const void *optval) { - assert(options); - assert(offset); - - if (code != SD_DHCP_OPTION_END) - /* always make sure there is space for an END option */ - size--; - - switch (code) { - - case SD_DHCP_OPTION_PAD: - case SD_DHCP_OPTION_END: - if (size < *offset + 1) - return -ENOBUFS; - - options[*offset] = code; - *offset += 1; - break; - - default: - if (size < *offset + optlen + 2) - return -ENOBUFS; - - options[*offset] = code; - options[*offset + 1] = optlen; - - memcpy_safe(&options[*offset + 2], optval, optlen); - *offset += optlen + 2; - - break; - } - - return 0; -} - -int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset, - uint8_t overload, - uint8_t code, size_t optlen, const void *optval) { - size_t file_offset = 0, sname_offset =0; - bool file, sname; - int r; - - assert(message); - assert(offset); - - file = overload & DHCP_OVERLOAD_FILE; - sname = overload & DHCP_OVERLOAD_SNAME; - - if (*offset < size) { - /* still space in the options array */ - r = option_append(message->options, size, offset, code, optlen, optval); - if (r >= 0) - return 0; - else if (r == -ENOBUFS && (file || sname)) { - /* did not fit, but we have more buffers to try - close the options array and move the offset to its end */ - r = option_append(message->options, size, offset, SD_DHCP_OPTION_END, 0, NULL); - if (r < 0) - return r; - - *offset = size; - } else - return r; - } - - if (overload & DHCP_OVERLOAD_FILE) { - file_offset = *offset - size; - - if (file_offset < sizeof(message->file)) { - /* still space in the 'file' array */ - r = option_append(message->file, sizeof(message->file), &file_offset, code, optlen, optval); - if (r >= 0) { - *offset = size + file_offset; - return 0; - } else if (r == -ENOBUFS && sname) { - /* did not fit, but we have more buffers to try - close the file array and move the offset to its end */ - r = option_append(message->options, size, offset, SD_DHCP_OPTION_END, 0, NULL); - if (r < 0) - return r; - - *offset = size + sizeof(message->file); - } else - return r; - } - } - - if (overload & DHCP_OVERLOAD_SNAME) { - sname_offset = *offset - size - (file ? sizeof(message->file) : 0); - - if (sname_offset < sizeof(message->sname)) { - /* still space in the 'sname' array */ - r = option_append(message->sname, sizeof(message->sname), &sname_offset, code, optlen, optval); - if (r >= 0) { - *offset = size + (file ? sizeof(message->file) : 0) + sname_offset; - return 0; - } else { - /* no space, or other error, give up */ - return r; - } - } - } - - return -ENOBUFS; -} - -static int parse_options(const uint8_t options[], size_t buflen, uint8_t *overload, - uint8_t *message_type, char **error_message, dhcp_option_callback_t cb, - void *userdata) { - uint8_t code, len; - const uint8_t *option; - size_t offset = 0; - - while (offset < buflen) { - code = options[offset ++]; - - switch (code) { - case SD_DHCP_OPTION_PAD: - continue; - - case SD_DHCP_OPTION_END: - return 0; - } - - if (buflen < offset + 1) - return -ENOBUFS; - - len = options[offset ++]; - - if (buflen < offset + len) - return -EINVAL; - - option = &options[offset]; - - switch (code) { - case SD_DHCP_OPTION_MESSAGE_TYPE: - if (len != 1) - return -EINVAL; - - if (message_type) - *message_type = *option; - - break; - - case SD_DHCP_OPTION_ERROR_MESSAGE: - if (len == 0) - return -EINVAL; - - if (error_message) { - _cleanup_free_ char *string = NULL; - - /* Accept a trailing NUL byte */ - if (memchr(option, 0, len - 1)) - return -EINVAL; - - string = strndup((const char *) option, len); - if (!string) - return -ENOMEM; - - if (!ascii_is_valid(string)) - return -EINVAL; - - free(*error_message); - *error_message = string; - string = NULL; - } - - break; - case SD_DHCP_OPTION_OVERLOAD: - if (len != 1) - return -EINVAL; - - if (overload) - *overload = *option; - - break; - - default: - if (cb) - cb(code, len, option, userdata); - - break; - } - - offset += len; - } - - if (offset < buflen) - return -EINVAL; - - return 0; -} - -int dhcp_option_parse(DHCPMessage *message, size_t len, dhcp_option_callback_t cb, void *userdata, char **_error_message) { - _cleanup_free_ char *error_message = NULL; - uint8_t overload = 0; - uint8_t message_type = 0; - int r; - - if (!message) - return -EINVAL; - - if (len < sizeof(DHCPMessage)) - return -EINVAL; - - len -= sizeof(DHCPMessage); - - r = parse_options(message->options, len, &overload, &message_type, &error_message, cb, userdata); - if (r < 0) - return r; - - if (overload & DHCP_OVERLOAD_FILE) { - r = parse_options(message->file, sizeof(message->file), NULL, &message_type, &error_message, cb, userdata); - if (r < 0) - return r; - } - - if (overload & DHCP_OVERLOAD_SNAME) { - r = parse_options(message->sname, sizeof(message->sname), NULL, &message_type, &error_message, cb, userdata); - if (r < 0) - return r; - } - - if (message_type == 0) - return -ENOMSG; - - if (_error_message && IN_SET(message_type, DHCP_NAK, DHCP_DECLINE)) { - *_error_message = error_message; - error_message = NULL; - } - - return message_type; -} |