diff options
Diffstat (limited to 'src/libsystemd/dhcp-option.c')
| -rw-r--r-- | src/libsystemd/dhcp-option.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/src/libsystemd/dhcp-option.c b/src/libsystemd/dhcp-option.c deleted file mode 100644 index 4d45b3b3a4..0000000000 --- a/src/libsystemd/dhcp-option.c +++ /dev/null @@ -1,184 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - 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 <stdint.h> -#include <string.h> -#include <errno.h> -#include <stdio.h> - -#include "dhcp-internal.h" - -int dhcp_option_append(uint8_t **buf, size_t *buflen, uint8_t code, - size_t optlen, const void *optval) -{ - if (!buf || !buflen) - return -EINVAL; - - switch (code) { - - case DHCP_OPTION_PAD: - case DHCP_OPTION_END: - if (*buflen < 1) - return -ENOBUFS; - - (*buf)[0] = code; - *buf += 1; - *buflen -= 1; - break; - - default: - if (*buflen < optlen + 2) - return -ENOBUFS; - - if (!optval) - return -EINVAL; - - (*buf)[0] = code; - (*buf)[1] = optlen; - memcpy(&(*buf)[2], optval, optlen); - - *buf += optlen + 2; - *buflen -= (optlen + 2); - - break; - } - - return 0; -} - -static int parse_options(const uint8_t *buf, size_t buflen, uint8_t *overload, - uint8_t *message_type, dhcp_option_cb_t cb, - void *user_data) -{ - const uint8_t *code = buf; - const uint8_t *len; - - while (buflen > 0) { - switch (*code) { - case DHCP_OPTION_PAD: - buflen -= 1; - code++; - break; - - case DHCP_OPTION_END: - return 0; - - case DHCP_OPTION_MESSAGE_TYPE: - if (buflen < 3) - return -ENOBUFS; - buflen -= 3; - - len = code + 1; - if (*len != 1) - return -EINVAL; - - if (message_type) - *message_type = *(len + 1); - - code += 3; - - break; - - case DHCP_OPTION_OVERLOAD: - if (buflen < 3) - return -ENOBUFS; - buflen -= 3; - - len = code + 1; - if (*len != 1) - return -EINVAL; - - if (overload) - *overload = *(len + 1); - - code += 3; - - break; - - default: - if (buflen < 3) - return -ENOBUFS; - - len = code + 1; - - if (buflen < (size_t)*len + 2) - return -EINVAL; - buflen -= *len + 2; - - if (cb) - cb(*code, *len, len + 1, user_data); - - code += *len + 2; - - break; - } - } - - if (buflen) - return -EINVAL; - - return 0; -} - -int dhcp_option_parse(DHCPMessage *message, size_t len, - dhcp_option_cb_t cb, void *user_data) -{ - uint8_t overload = 0; - uint8_t message_type = 0; - uint8_t *opt = (uint8_t *)(message + 1); - int res; - - if (!message) - return -EINVAL; - - if (len < sizeof(DHCPMessage) + 4) - return -EINVAL; - - len -= sizeof(DHCPMessage) + 4; - - if (opt[0] != 0x63 && opt[1] != 0x82 && opt[2] != 0x53 && - opt[3] != 0x63) - return -EINVAL; - - res = parse_options(&opt[4], len, &overload, &message_type, - cb, user_data); - if (res < 0) - return res; - - if (overload & DHCP_OVERLOAD_FILE) { - res = parse_options(message->file, sizeof(message->file), - NULL, &message_type, cb, user_data); - if (res < 0) - return res; - } - - if (overload & DHCP_OVERLOAD_SNAME) { - res = parse_options(message->sname, sizeof(message->sname), - NULL, &message_type, cb, user_data); - if (res < 0) - return res; - } - - if (message_type) - return message_type; - - return -ENOMSG; -} |