55 lines
1002 B
C++
55 lines
1002 B
C++
#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#define MAX(a, b) ((a) < (b) ? (b) : (a))
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int main(int argc, char** argv)
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{
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if (argc != 2)
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{
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fprintf(stderr, "usage: %s DOMAIN\n", argv[0]);
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return 1;
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}
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int socket = ::socket(AF_UNIX, SOCK_SEQPACKET, 0);
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if (socket == -1)
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{
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perror("socket");
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return 1;
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}
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sockaddr_un addr;
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addr.sun_family = AF_UNIX;
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strcpy(addr.sun_path, "/tmp/resolver.sock");
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if (connect(socket, (sockaddr*)&addr, sizeof(addr)) == -1)
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{
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perror("connect");
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return 1;
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}
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if (send(socket, argv[1], strlen(argv[1]), 0) == -1)
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{
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perror("send");
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return 1;
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}
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sockaddr_storage storage;
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if (recv(socket, &storage, sizeof(storage), 0) == -1)
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{
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perror("recv");
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return 1;
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}
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close(socket);
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char buffer[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)];
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printf("%s\n", inet_ntop(storage.ss_family, storage.ss_storage, buffer, sizeof(buffer)));
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return 0;
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}
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