--- a/connection.c
+++ b/connection.c
@@ -16,36 +16,38 @@
#include <sys/types.h>
#include <sys/socket.h>
-int connection (char *ip, unsigned short port)
+int connection (char *server, char *port)
{
- struct hostent *hs;
- struct sockaddr_in sock;
+ struct addrinfo hints;
+ struct addrinfo *result, *rp;
- int sockfd;
-
- memset (&sock, 0, sizeof (sock));
- sock.sin_family = PF_INET;
- sock.sin_port = htons (port);
+ int sockfd = -1;
- if ((sock.sin_addr.s_addr = inet_addr (ip)) == -1) {
- if ((hs = gethostbyname (ip)) == NULL) {
- perror ("[-] Error");
- return -1;
- }
- sock.sin_family = hs->h_addrtype;
- memcpy (&sock.sin_addr.s_addr, hs->h_addr_list[0], hs->h_length);
- }
+ memset (&hints, 0, sizeof (struct addrinfo));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = 0;
+ hints.ai_protocol = IPPROTO_TCP;
- if ((sockfd = socket (PF_INET, SOCK_STREAM, 0)) < 0) {
- perror ("[-] Error");
+ if (getaddrinfo (server, port, &hints, &result) != 0) {
+ perror ("getaddrinfo");
return -1;
}
- if (connect (sockfd, (struct sockaddr *)&sock, sizeof (sock)) < 0) {
- perror ("[-] Error ");
- return -1;
+ for (rp = result; rp != NULL; rp = rp->ai_next) {
+ if ((sockfd = socket (rp->ai_family, rp->ai_socktype, rp->ai_protocol)) == -1)
+ continue;
+
+ if (connect (sockfd, rp->ai_addr, rp->ai_addrlen) != -1) {
+ break;
+ }
+ close (sockfd);
+ sockfd = -1;
}
+ if (result != NULL)
+ freeaddrinfo (result);
+
return (sockfd);
}
@@ -58,16 +60,16 @@
int num;
if (argc != 3) {
- printf ("Usage: %s <ipaddr> <port>\n", argv[0]);
+ printf ("Usage: %s <ipaddr> <service>\n", argv[0]);
return EXIT_FAILURE;
}
- if ((sockfd = connection (argv[1], atoi (argv[2]))) < 0) {
- printf ("Connection error: %s:%d\n", argv[1], atoi (argv[2]));
+ if ((sockfd = connection (argv[1], argv[2])) < 0) {
+ printf ("Connection error: %s:%s\n", argv[1], argv[2]);
return EXIT_FAILURE;
}
- if (write (sockfd, "GET /\r\n", 7) == -1) {
+ if (write (sockfd, "GET / HTTP/1.0\r\n\r\n", 18) == -1) {
perror ("write");
return EXIT_FAILURE;
}
--- a/dnsresolve.c
+++ b/dnsresolve.c
@@ -11,27 +11,42 @@
int main (int argc, char **argv)
{
- struct hostent *he;
+ struct addrinfo hints;
+ struct addrinfo *result, *rp;
- char *ip;
-
- int i = 0;
+ void *addr = NULL;
+ char ip[INET6_ADDRSTRLEN];
if (argc != 2) {
fprintf (stderr, "Usage: %s <hostname>\n", argv[0]);
return EXIT_FAILURE;
}
- he = gethostbyname (argv[1]);
- ip = NULL;
+ memset (&hints, 0, sizeof (hints));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+
+ if (getaddrinfo (argv[1], NULL, &hints, &result) != 0) {
+ perror ("getaddrinfo");
+ return EXIT_FAILURE;
+ }
- if (he != NULL) {
- while (he->h_addr_list[i] != NULL) {
- ip = inet_ntoa (*((struct in_addr *)he->h_addr_list[i]));
- printf ("%s: %s\n", argv[1], ip);
- i++;
+ for (rp = result; rp != NULL; rp = rp->ai_next) {
+ if (rp->ai_family == AF_INET6) {
+ struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)rp->ai_addr;
+ addr = &(ipv6->sin6_addr);
+ } else if (rp->ai_family == AF_INET) {
+ struct sockaddr_in *ipv4 = (struct sockaddr_in *)rp->ai_addr;
+ addr = &(ipv4->sin_addr);
+ }
+ if (addr != NULL) {
+ if (inet_ntop (rp->ai_family, addr, ip, sizeof (ip)) != NULL)
+ printf ("%s: %s\n", argv[1], ip);
}
}
+ if (result != NULL)
+ freeaddrinfo (result);
+
return EXIT_SUCCESS;
}
--- a/lsflib/include/lsf/lsf.h
+++ b/lsflib/include/lsf/lsf.h
@@ -31,7 +31,7 @@
int isFile (char *);
/* isLink returns true, if a fd points to a link */
-int isLink(char *);
+int isLink (char *);
/* getdir prints a dir hierarchy */
void getdir (char *, int);