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74 lines
2.9 KiB
74 lines
2.9 KiB
/**************************************************************************** |
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* libc/net/lib_inetaddr.c |
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* |
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* Copyright (C) 2011 Yu Qiang. All rights reserved. |
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* Author: Yu Qiang <yuq825@gmail.com> |
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* |
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* This file is a part of NuttX: |
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* |
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* Copyright (C) 2011 Gregory Nutt. 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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* |
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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 |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <stdio.h> |
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#include <arpa/inet.h> |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* name inet_addr |
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* |
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* Description: |
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* The inet_addr() function converts the string pointed to by cp, in the |
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* standard IPv4 dotted decimal notation, to an integer value suitable for |
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* use as an Internet address. |
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****************************************************************************/ |
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in_addr_t inet_addr(FAR const char *cp) |
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{ |
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unsigned int a, b, c, d; |
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uint32_t result; |
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sscanf(cp, "%u.%u.%u.%u", &a, &b, &c, &d); |
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result = a << 8; |
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result |= b; |
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result <<= 8; |
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result |= c; |
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result <<= 8; |
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result |= d; |
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return HTONL(result); |
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}
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