65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
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#include <errno.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <string.h>
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/*
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* gai_strerror is based on
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* http://www.opengroup.org/onlinepubs/009695399/functions/gai_strerror.html
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*/
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const char *gai_strerror(int ecode)
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{
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static char buffer[256];
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/* check for each known error code */
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switch (ecode)
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{
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case EAI_AGAIN:
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return "The name could not be resolved at this time";
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case EAI_BADFLAGS:
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return "The flags had an invalid value";
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case EAI_FAIL:
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return "A non-recoverable error occurred";
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case EAI_FAMILY:
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return "The address family was not recognized or the "
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"address length was invalid for the specified "
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"family";
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case EAI_MEMORY:
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return "There was a memory allocation failure";
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case EAI_NONAME:
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return "The name does not resolve for the supplied "
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"parameters, NI_NAMEREQD is set and the host's "
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"name cannot be located, or both nodename and "
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"servname were null";
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case EAI_SERVICE:
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return "The service passed was not recognized for the "
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"specified socket type";
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case EAI_SOCKTYPE:
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return "The intended socket type was not recognized";
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case EAI_SYSTEM:
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snprintf(buffer,
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sizeof(buffer),
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"A system error occurred: %s",
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strerror(errno));
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return buffer;
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case EAI_OVERFLOW:
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return "An argument buffer overflowed";
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}
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/* unknown error code */
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snprintf(buffer,
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sizeof(buffer),
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"An unknown error code was passed to gai_strerror: %d",
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ecode);
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return buffer;
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}
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