c447e5cf15
See script directory for method. The script to run in the top level MaxScale directory is called maxscale-uncrustify.sh, which uses another script, list-src, from the same directory (so you need to set your PATH). The uncrustify version was 0.66.
60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
/*
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* Find local ip used as source ip in ip packets.
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* Use getsockname and a udp connection
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*/
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#include <stdio.h> // printf
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#include <string.h> // memset
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#include <errno.h> // errno
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#include <sys/socket.h> // socket
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#include <netinet/in.h> // sockaddr_in
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#include <arpa/inet.h> // getsockname
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#include <unistd.h> // close
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#include "get_my_ip.h"
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int get_my_ip(char* remote_ip, char* my_ip)
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{
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int dns_port = 53;
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struct sockaddr_in serv;
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int sock = socket (AF_INET, SOCK_DGRAM, 0);
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// Socket could not be created
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if (sock < 0)
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{
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return 1;
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}
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memset(&serv, 0, sizeof(serv));
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serv.sin_family = AF_INET;
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serv.sin_addr.s_addr = inet_addr(remote_ip);
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serv.sin_port = htons(dns_port);
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connect(sock, (const struct sockaddr*) &serv, sizeof(serv));
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struct sockaddr_in name;
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socklen_t namelen = sizeof(name);
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getsockname(sock, (struct sockaddr*) &name, &namelen);
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char buffer[100];
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const char* p = inet_ntop(AF_INET, &name.sin_addr, buffer, 100);
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if (p != NULL)
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{
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// printf("Local ip is : %s \n" , buffer);
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strcpy(my_ip, buffer);
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close(sock);
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return 0;
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}
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else
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{
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// Some error
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printf ("Error number : %d . Error message : %s \n", errno, strerror(errno));
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close(sock);
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return 2;
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}
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}
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