* Version 2.1 - Check for disconnection before INIT_PASSWD is received
* to make errormsg a bit more helpful in case the server can't
* open the exported file.
+ * 16/03/2010 - Add IPv6 support.
+ * Kitt Tientanopajai <kitt@kitty.in.th>
+ * Neutron Soutmun <neo.neutron@gmail.com>
+ * Suriya Soutmun <darksolar@gmail.com>
*/
#include "config.h"
#include <sys/types.h>
#include <unistd.h>
#include <netinet/tcp.h>
-#include <netinet/in.h> /* sockaddr_in, htons, in_addr */
-#include <netdb.h> /* hostent, gethostby*, getservby* */
+#include <netinet/in.h>
+#include <netdb.h>
#include <stdio.h>
#include <fcntl.h>
#include <syslog.h>
int opennet(char *name, int port, int sdp) {
int sock;
- struct sockaddr_in xaddrin;
- int xaddrinlen = sizeof(xaddrin);
- struct hostent *hostn;
- int af;
-
- hostn = gethostbyname(name);
- if (!hostn)
- err("Gethostname failed: %h\n");
+ char portstr[6];
+ struct addrinfo hints;
+ struct addrinfo *ai = NULL;
+ struct addrinfo *rp = NULL;
+ int e;
+
+ snprintf(portstr, sizeof(portstr), "%d", port);
+
+ memset(&hints,'\0',sizeof(hints));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICSERV;
+ hints.ai_protocol = IPPROTO_TCP;
+
+ e = getaddrinfo(name, portstr, &hints, &ai);
+
+ if(e != 0) {
+ fprintf(stderr, "getaddrinfo failed: %s\n", gai_strerror(e));
+ freeaddrinfo(ai);
+ exit(EXIT_FAILURE);
+ }
- af = AF_INET;
if(sdp) {
#ifdef WITH_SDP
- af = AF_INET_SDP;
+ if (ai->ai_family == AF_INET)
+ ai->ai_family = AF_INET_SDP;
+ else (ai->ai_family == AF_INET6)
+ ai->ai_family = AF_INET6_SDP;
#else
err("Can't do SDP: I was not compiled with SDP support!");
#endif
}
- if ((sock = socket(af, SOCK_STREAM, IPPROTO_TCP)) < 0)
- err("Socket failed: %m");
- xaddrin.sin_family = af;
- xaddrin.sin_port = htons(port);
- xaddrin.sin_addr.s_addr = *((int *) hostn->h_addr);
- if ((connect(sock, (struct sockaddr *) &xaddrin, xaddrinlen) < 0))
- err("Connect: %m");
+ for(rp = ai; rp != NULL; rp = rp->ai_next) {
+ sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+
+ if(sock == -1)
+ continue; /* error */
+
+ if(connect(sock, rp->ai_addr, rp->ai_addrlen) != -1)
+ break; /* success */
+ }
+
+ if (rp == NULL)
+ err("Socket failed: %m");
setmysockopt(sock);
+
+ freeaddrinfo(ai);
return sock;
}
int nofork=0;
u64 size64;
u32 flags;
+ int i;
logging();
err("Cannot open NBD: %m\nPlease ensure the 'nbd' module is loaded.");
++argv; --argc; /* skip device */
- if (argc>3) goto errmsg;
- if (argc) {
- if(strncmp(argv[0], "-swap", 5)==0) {
- swap=1;
- ++argv;--argc;
+ if (argc>4) goto errmsg;
+ for(i=0; i<4; i++) {
+ if (argc) {
+ if(strncmp(argv[0], "-swap", 5)==0) {
+ swap=1;
+ ++argv;--argc;
+ }
}
- }
- if (argc) {
- if(strncmp(argv[0], "-persist", 8)==0) {
- cont=1;
- ++argv;--argc;
+ if (argc) {
+ if(strncmp(argv[0], "-persist", 8)==0) {
+ cont=1;
+ ++argv;--argc;
+ }
}
- }
- if (argc) {
- if(strncmp(argv[0], "-sdp", 4)==0) {
- sdp=1;
- ++argv;--argc;
+ if (argc) {
+ if(strncmp(argv[0], "-sdp", 4)==0) {
+ sdp=1;
+ ++argv;--argc;
+ }
}
- }
- if (argc) {
- if(strncmp(argv[0], "-nofork", 7)==0) {
- nofork=1;
- ++argv;--argc;
+ if (argc) {
+ if(strncmp(argv[0], "-nofork", 7)==0) {
+ nofork=1;
+ ++argv;--argc;
+ }
}
}
if(argc) goto errmsg;
/* Go daemon */
- daemon(0,0);
+#ifndef NOFORK
+ if(!nofork) daemon(0,0);
+#endif
do {
#ifndef NOFORK
- if (!nofork) {
- if (fork()) {
- while(check_conn(nbddev, 0)) {
- sleep(1);
- }
- open(nbddev, O_RDONLY);
- exit(0);
+ if (fork()) {
+ /* Due to a race, the kernel NBD driver cannot
+ * call for a reread of the partition table
+ * in the handling of the NBD_DO_IT ioctl().
+ * Therefore, this is done in the first open()
+ * of the device. We therefore make sure that
+ * the device is opened at least once after the
+ * connection was made. This has to be done in a
+ * separate process, since the NBD_DO_IT ioctl()
+ * does not return until the NBD device has
+ * disconnected.
+ */
+ while(check_conn(nbddev, 0)) {
+ sleep(1);
}
+ open(nbddev, O_RDONLY);
+ exit(0);
}
#endif