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#include <arpa/inet.h>
#include <sys/socket.h>
#include <assert.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if EMSCRIPTEN
#include <emscripten.h>
#endif
int main() {
struct addrinfo hints;
struct addrinfo *servinfo;
struct sockaddr_in sa4;
struct sockaddr_in6 sa6;
char node[256];
char serv[256];
int flags;
int err;
#ifndef __APPLE__
// incorrect sockaddr size
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
err = getnameinfo((struct sockaddr*)&sa4, sizeof(sa4)-1, NULL, 0, NULL, 0, 0);
assert(err == EAI_FAMILY);
memset(&sa6, 0, sizeof(sa6));
sa6.sin6_family = AF_INET6;
err = getnameinfo((struct sockaddr*)&sa6, sizeof(sa6)-1, NULL, 0, NULL, 0, 0);
assert(err == EAI_FAMILY);
// invalid family
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = 9999;
err = getnameinfo((struct sockaddr*)&sa4, sizeof(sa4), NULL, 0, NULL, 0, 0);
assert(err == EAI_FAMILY);
#endif
// NI_NUMERICHOST and NI_NAMEREQD conflict
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
flags = NI_NUMERICHOST | NI_NAMEREQD;
err = getnameinfo((struct sockaddr*)&sa4, sizeof(sa4), node, sizeof(node), serv, sizeof(serv), flags);
assert(err == EAI_NONAME);
// too small of buffer
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
*(uint32_t*)&sa4.sin_addr = 67305985;
sa4.sin_port = htons(54321);
flags = NI_NUMERICHOST;
err = getnameinfo((struct sockaddr*)&sa4, sizeof(sa4), node, 1, serv, sizeof(serv), flags);
assert(err == EAI_OVERFLOW);
err = getnameinfo((struct sockaddr*)&sa4, sizeof(sa4), node, sizeof(node), serv, 1, flags);
assert(err == EAI_OVERFLOW);
// NI_NAMEREQD and lookup failed
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
*(uint32_t*)&sa4.sin_addr = 67305985;
flags = NI_NAMEREQD;
err = getnameinfo((struct sockaddr*)&sa4, sizeof(sa4), node, sizeof(node), serv, sizeof(serv), flags);
assert(err == EAI_NONAME);
// lookup failed
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
*(uint32_t*)&sa4.sin_addr = 67305985;
err = getnameinfo((struct sockaddr*)&sa4, sizeof(sa4), node, sizeof(node), serv, sizeof(serv), flags);
assert(err == EAI_NONAME);
// no lookup
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
*(uint32_t*)&sa4.sin_addr = 67305985;
sa4.sin_port = htons(54321);
flags = NI_NUMERICHOST;
err = getnameinfo((struct sockaddr*)&sa4, sizeof(sa4), node, sizeof(node), serv, sizeof(serv), flags);
assert(!err);
assert(!strcmp(node, "1.2.3.4"));
assert(!strcmp(serv, "54321"));
// lookup
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
err = getaddrinfo("www.mozilla.org", "54321", &hints, &servinfo);
assert(!err);
flags = NI_NAMEREQD;
err = getnameinfo(servinfo->ai_addr, servinfo->ai_addrlen, node, sizeof(node), serv, sizeof(serv), flags);
assert(!err);
assert(strstr(node, "mozilla"));
assert(!strcmp(serv, "54321"));
puts("success");
return EXIT_SUCCESS;
}
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