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/* $OpenBSD: pptp_subr.c,v 1.4 2012/05/08 13:15:12 yasuoka Exp $ */ |
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/*- |
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* Copyright (c) 2009 Internet Initiative Japan Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* utility functions for the pptp.c */ |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <sys/time.h> |
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#include <netinet/in.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <event.h> |
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#include "bytebuf.h" |
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#include "hash.h" |
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#include "slist.h" |
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#include "pptp.h" |
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#include "pptp_local.h" |
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#include "pptp_subr.h" |
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/* convert the Faming Capability bit as CSV strings */ |
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const char * |
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pptp_framing_string(uint32_t bits) |
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{ |
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static char framing_cap_buf[40]; |
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snprintf(framing_cap_buf, sizeof(framing_cap_buf), "%s%s", |
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(bits & PPTP_CTRL_FRAMING_ASYNC)? ",async" : "", |
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(bits & PPTP_CTRL_FRAMING_SYNC)? ",sync" : ""); |
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if (strlen(framing_cap_buf) > 0) |
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return &framing_cap_buf[1]; |
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return ""; |
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} |
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/* convert the Bearer Capability bit as CSV strings */ |
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const char * |
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pptp_bearer_string(uint32_t bits) |
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{ |
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static char bearer_cap_buf[40]; |
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snprintf(bearer_cap_buf, sizeof(bearer_cap_buf), "%s%s", |
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(bits &PPTP_CTRL_BEARER_ANALOG)? ",analog" : "", |
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(bits &PPTP_CTRL_BEARER_DIGITAL)? ",digital" : ""); |
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if (strlen(bearer_cap_buf) > 0) |
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return &bearer_cap_buf[1]; |
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return ""; |
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} |
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/* build common header part of a control packet */ |
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void |
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pptp_init_header(struct pptp_ctrl_header *header, int length, int ctrl_mes_type) |
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{ |
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header->length = htons(length); |
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header->pptp_message_type = htons(PPTP_MES_TYPE_CTRL); |
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header->magic_cookie = htonl(PPTP_MAGIC_COOKIE); |
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header->control_message_type = htons(ctrl_mes_type); |
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header->reserved0 = 0; |
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} |
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#define NAME_VAL(x) { x, #x } |
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static struct _label_name { |
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int label; |
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const char *name; |
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} pptp_StopCCRQ_reason_labels[] = { |
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NAME_VAL(PPTP_StopCCRQ_REASON_NONE), |
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NAME_VAL(PPTP_StopCCRQ_REASON_STOP_PROTOCOL), |
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NAME_VAL(PPTP_StopCCRQ_REASON_STOP_LOCAL_SHUTDOWN), |
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}, pptp_StopCCRP_result_labels[] = { |
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NAME_VAL(PPTP_StopCCRP_RESULT_OK), |
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NAME_VAL(PPTP_StopCCRP_RESULT_GENERIC_ERROR), |
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}, pptp_general_error_labels[] = { |
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NAME_VAL(PPTP_ERROR_NONE), |
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NAME_VAL(PPTP_ERROR_NOT_CONNECTED), |
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NAME_VAL(PPTP_ERROR_BAD_FORMAT), |
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NAME_VAL(PPTP_ERROR_NO_RESOURCE), |
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NAME_VAL(PPTP_ERROR_BAD_CALL), |
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}, pptp_ctrl_mes_type_labels[] = { |
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NAME_VAL(PPTP_CTRL_MES_CODE_SCCRQ), |
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NAME_VAL(PPTP_CTRL_MES_CODE_SCCRP), |
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NAME_VAL(PPTP_CTRL_MES_CODE_StopCCRQ), |
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NAME_VAL(PPTP_CTRL_MES_CODE_StopCCRP), |
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NAME_VAL(PPTP_CTRL_MES_CODE_ECHO_RQ), |
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NAME_VAL(PPTP_CTRL_MES_CODE_ECHO_RP), |
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NAME_VAL(PPTP_CTRL_MES_CODE_OCRQ), |
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NAME_VAL(PPTP_CTRL_MES_CODE_OCRP), |
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NAME_VAL(PPTP_CTRL_MES_CODE_ICRQ), |
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NAME_VAL(PPTP_CTRL_MES_CODE_ICRP), |
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NAME_VAL(PPTP_CTRL_MES_CODE_ICCN), |
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NAME_VAL(PPTP_CTRL_MES_CODE_CCR), |
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NAME_VAL(PPTP_CTRL_MES_CODE_CDN), |
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NAME_VAL(PPTP_CTRL_MES_CODE_SLI), |
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}, pptp_CDN_result_labels[] = { |
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NAME_VAL(PPTP_CDN_RESULT_LOST_CARRIER), |
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NAME_VAL(PPTP_CDN_RESULT_GENRIC_ERROR), |
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NAME_VAL(PPTP_CDN_RESULT_ADMIN_SHUTDOWN), |
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NAME_VAL(PPTP_CDN_RESULT_REQUEST), |
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}; |
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/* value to strings convert macros */ |
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#define LABEL_TO_STRING(func_name, label_names, prefix_len) \ |
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const char * \ |
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func_name(int code) \ |
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{ \ |
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int i; \ |
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\ |
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for (i = 0; i < countof(label_names); i++) { \ |
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if (label_names[i].label == code) \ |
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return label_names[i].name + prefix_len;\ |
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} \ |
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\ |
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return "UNKNOWN"; \ |
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} |
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LABEL_TO_STRING(pptp_StopCCRQ_reason_string, pptp_StopCCRQ_reason_labels, 21) |
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LABEL_TO_STRING(pptp_StopCCRP_result_string, pptp_StopCCRP_result_labels, 21) |
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LABEL_TO_STRING(pptp_general_error_string, pptp_general_error_labels, 11) |
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LABEL_TO_STRING(pptp_ctrl_mes_type_string, pptp_ctrl_mes_type_labels, 19) |
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LABEL_TO_STRING(pptp_CDN_result_string, pptp_CDN_result_labels, 16) |