84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
#include <netdb.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#define satosin(x) ((struct sockaddr_in *) &(x))
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#define SOCKADDR(x) (satosin(x)->sin_addr.s_addr)
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#define SOCKADDR_2(x) (satosin(x)->sin_addr)
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#define SOCKPORT(x) (satosin(x)->sin_port)
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#define SOCKFAMILY(x) (satosin(x)->sin_family)
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int main() {
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struct sockaddr a = {0}, *sa = &a;
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char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
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SOCKPORT(a) = htons(80);
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memcpy( &( (struct sockaddr_in*) sa ) ->sin_addr , (char[]) {127,0,0,1}, 4);
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int ret;
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if ((ret = getnameinfo(sa, 0, hbuf, sizeof(hbuf), sbuf,
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sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV)) == 0)
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printf("host=%s, serv=%s\n", hbuf, sbuf);
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else
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printf("%s\n", gai_strerror(ret));
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assert(ret == EAI_FAMILY);
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if ((ret = getnameinfo(sa, sizeof a, hbuf, sizeof(hbuf), sbuf,
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sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV)) == 0)
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printf("host=%s, serv=%s\n", hbuf, sbuf);
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else
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printf("%s\n", gai_strerror(ret));
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assert(ret == EAI_FAMILY);
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SOCKFAMILY(a) = AF_INET;
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if ((ret = getnameinfo(sa, sizeof a, hbuf, 1, sbuf,
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sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV)) == 0)
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printf("host=%s, serv=%s\n", hbuf, sbuf);
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else
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printf("%s\n", gai_strerror(ret));
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assert(ret == EAI_OVERFLOW);
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if ((ret = getnameinfo(sa, sizeof a, hbuf, 0, sbuf,
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1, NI_NUMERICHOST | NI_NUMERICSERV)) == 0)
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printf("host=%s, serv=%s\n", hbuf, sbuf);
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else
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printf("%s\n", gai_strerror(ret));
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assert(ret == EAI_OVERFLOW);
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if ((ret = getnameinfo(sa, sizeof a, hbuf, 0, sbuf,
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sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV)) == 0)
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printf("host=%s, serv=%s\n", hbuf, sbuf);
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else
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printf("%s\n", gai_strerror(ret));
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assert(ret == 0);
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if ((ret = getnameinfo(sa, sizeof a, hbuf, sizeof hbuf, sbuf,
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0, NI_NUMERICHOST | NI_NUMERICSERV)) == 0)
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printf("host=%s, serv=%s\n", hbuf, sbuf);
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else
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printf("%s\n", gai_strerror(ret));
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assert(ret == 0);
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if ((ret = getnameinfo(sa, sizeof a, hbuf, sizeof(hbuf), sbuf,
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sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV)) == 0)
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printf("host=%s, serv=%s\n", hbuf, sbuf);
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else
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printf("%s\n", gai_strerror(ret));
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assert(ret == 0);
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return 0;
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}
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