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Diffstat (limited to 'src/libsystemd-network/dhcp-option.c')
-rw-r--r--src/libsystemd-network/dhcp-option.c263
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;
-}
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