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