PA: 83 - Revised IPv6 patch

Author: Holger Liebig
Deduplicated socket connection shared among lan and lanplus.
Allows IPv6 address and tries to pick correct scope ID.

ipmitool/configure.in

@@ -29,7 +29,7 @@ AC_C_BIGENDIAN
 AC_FUNC_MALLOC
 AC_FUNC_SELECT_ARGTYPES
 AC_FUNC_STRTOD
-AC_CHECK_FUNCS([alarm gethostbyname socket select])
+AC_CHECK_FUNCS([alarm gethostbyname getaddrinfo getifaddrs socket select])
 AC_CHECK_FUNCS([memmove memset strchr strdup strerror])
 AC_CHECK_FUNCS([getpassphrase])
 
@@ -39,6 +39,8 @@ AM_PROG_LIBTOOL
 LIBTOOL="$LIBTOOL --silent"
 
 AC_SEARCH_LIBS([gethostbyname], [nsl])
+AC_SEARCH_LIBS([getaddrinfo], [nsl])
+AC_SEARCH_LIBS([getifaddrs], [nsl])
 AC_SEARCH_LIBS([socket], [socket], [],
 	[AC_CHECK_LIB([nsl], [socket],
 		[LIBS="$LIBS -lsocket -lnsl"], [], [-lsocket])])

ipmitool/include/ipmitool/ipmi_intf.h

@@ -89,8 +89,9 @@ struct ipmi_session {
 	uint32_t out_seq;
 	uint32_t timeout;
 
-	struct sockaddr_in addr;
+	struct sockaddr_storage addr;
 	socklen_t addrlen;
+	int ai_family; /* Protocol family for socket.  */
 
 	/*
 	 * This struct holds state data specific to IPMI v2 / RMCP+ sessions
@@ -211,4 +212,7 @@ void ipmi_intf_session_set_timeout(struct ipmi_intf * intf, uint32_t timeout);
 void ipmi_intf_session_set_retry(struct ipmi_intf * intf, int retry);
 void ipmi_cleanup(struct ipmi_intf * intf);
 
+#if defined(IPMI_INTF_LAN) || defined (IPMI_INTF_LANPLUS)
+int  ipmi_intf_socket_connect(struct ipmi_intf * intf);
+#endif
 #endif /* IPMI_INTF_H */

ipmitool/lib/ipmi_dcmi.c

@@ -481,44 +481,14 @@ ipmi_dcmi_prnt_oobDiscover(struct ipmi_intf * intf)
 	intf->abort = 1;
 	intf->session->sol_data.sequence_number = 1;
 
-	/* open port to BMC */
-	memset(&s->addr, 0, sizeof(struct sockaddr_in));
-	s->addr.sin_family = AF_INET;
-	s->addr.sin_port = htons(s->port);
-
-	rc = inet_pton(AF_INET, (const char *)s->hostname, &s->addr.sin_addr);
-	if (rc <= 0) {
-		struct hostent *host = gethostbyname((const char *)s->hostname);
-		if (host == NULL) {
-			lprintf(LOG_ERR, "Address lookup for %s failed",
-			s->hostname);
-			return -1;
-		}
-		if (host->h_addrtype != AF_INET) {
-			lprintf(LOG_ERR,
-					"Address lookup for %s failed. Got %s, expected IPv4 address.",
-					s->hostname,
-					(host->h_addrtype == AF_INET6) ? "IPv6" : "Unknown");
-			return (-1);
-		}
-		s->addr.sin_family = host->h_addrtype;
-		memcpy(&s->addr.sin_addr, host->h_addr, host->h_length);
-	}
-
-	lprintf(LOG_DEBUG, "IPMI LAN host %s port %d",
-			s->hostname, ntohs(s->addr.sin_port));
-
-	intf->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-	if (intf->fd < 0) {
-		lperror(LOG_ERR, "Socket failed");
+	if (ipmi_intf_socket_connect (intf)  == -1) {
+		lprintf(LOG_ERR, "Could not open socket!");
 		return -1;
 	}
 
-	/* connect to UDP socket so we get async errors */
-	rc = connect(intf->fd, (struct sockaddr *)&s->addr,
-			sizeof(struct sockaddr_in));
-	if (rc < 0) {
-		lperror(LOG_ERR, "Connect failed");
+	if (intf->fd < 0) {
+		lperror(LOG_ERR, "Connect to %s failed",
+			s->hostname);
 		intf->close(intf);
 		return -1;
 	}

ipmitool/lib/ipmi_tsol.c

@@ -381,7 +381,7 @@ int
 ipmi_tsol_main(struct ipmi_intf * intf, int argc, char ** argv)
 {
 	struct pollfd fds_wait[3], fds_data_wait[3], *fds;
-	struct sockaddr_in sin, myaddr;
+	struct sockaddr_in sin, myaddr, *sa_in;
 	socklen_t mylen;
 	char *recvip = NULL;
 	char out_buff[IPMI_BUF_SIZE * 8], in_buff[IPMI_BUF_SIZE];
@@ -398,8 +398,11 @@ ipmi_tsol_main(struct ipmi_intf * intf, int argc, char ** argv)
 	}
 
 	for (i = 0; i<argc; i++) {
-		if (sscanf(argv[i], "%d.%d.%d.%d", &ip1, &ip2, &ip3, &ip4) == 4)
-			recvip = strdup(argv[i]);
+		if (sscanf(argv[i], "%d.%d.%d.%d", &ip1, &ip2, &ip3, &ip4) == 4) {
+			/* not free'd ...*/
+			/* recvip = strdup(argv[i]); */
+			recvip = argv[i];
+		} 
 		else if (sscanf(argv[i], "port=%d", &ip1) == 1)
 			port = ip1;
 		else if (sscanf(argv[i], "rows=%d", &ip1) == 1)
@@ -427,8 +430,9 @@ ipmi_tsol_main(struct ipmi_intf * intf, int argc, char ** argv)
 	sin.sin_family = AF_INET;
 	sin.sin_port = htons(port);
 
+	sa_in = (struct sockaddr_in *)&intf->session->addr;
 	result = inet_pton(AF_INET, (const char *)intf->session->hostname,
-			   &intf->session->addr.sin_addr);
+			   &sa_in->sin_addr);
 
 	if (result <= 0) {
 		struct hostent *host = gethostbyname((const char *)intf->session->hostname);
@@ -444,8 +448,8 @@ ipmi_tsol_main(struct ipmi_intf * intf, int argc, char ** argv)
 					(host->h_addrtype == AF_INET6) ? "IPv6" : "Unknown");
 			return (-1);
 		}
-		intf->session->addr.sin_family = host->h_addrtype;
-		memcpy(&intf->session->addr.sin_addr, host->h_addr, host->h_length);
+		sa_in->sin_family = host->h_addrtype;
+		memcpy(&sa_in->sin_addr, host->h_addr, host->h_length);
 	}
 
 	fd_socket = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
@@ -455,6 +459,7 @@ ipmi_tsol_main(struct ipmi_intf * intf, int argc, char ** argv)
 	}
 	if (-1 == bind(fd_socket, (struct sockaddr *)&sin, sizeof(sin))) {
 		lprintf(LOG_ERR, "Failed to bind socket.");
+		close(fd_socket);
 		return -1;
 	}
 

ipmitool/src/plugins/ipmi_intf.c

@@ -36,6 +36,18 @@
 #if defined(HAVE_CONFIG_H)
 # include <config.h>
 #endif
+
+#if defined(IPMI_INTF_LAN) || defined (IPMI_INTF_LANPLUS)
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <ifaddrs.h>
+#include <unistd.h>
+#include <netdb.h>
+#endif
+
+
 #include <ipmitool/ipmi_intf.h>
 #include <ipmitool/ipmi.h>
 #include <ipmitool/ipmi_sdr.h>
@@ -321,3 +333,170 @@ ipmi_cleanup(struct ipmi_intf * intf)
 {
 	ipmi_sdr_list_empty(intf);
 }
+
+#if defined(IPMI_INTF_LAN) || defined (IPMI_INTF_LANPLUS)
+int
+ipmi_intf_socket_connect(struct ipmi_intf * intf)
+{
+	struct ipmi_session *session;
+
+	struct sockaddr_storage addr;
+	struct addrinfo hints;
+	struct addrinfo *rp0 = NULL, *rp;
+	char service[NI_MAXSERV];
+	int rc;
+
+	if (!intf || intf->session == NULL)
+		return -1;
+
+	session = intf->session;
+
+	if (session->hostname == NULL || strlen((const char *)session->hostname) == 0) {
+		lprintf(LOG_ERR, "No hostname specified!");
+		return -1;
+	}
+
+	/* open port to BMC */
+	memset(&addr, 0, sizeof(addr));
+
+	sprintf(service, "%d", session->port);
+	/* Obtain address(es) matching host/port */
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family   = AF_UNSPEC;    /* Allow IPv4 or IPv6 */
+	hints.ai_socktype = SOCK_DGRAM;   /* Datagram socket */
+	hints.ai_flags    = 0;            /* use AI_NUMERICSERV for no name resolution */
+	hints.ai_protocol = IPPROTO_UDP; /*  */
+
+	if (getaddrinfo(session->hostname, service, &hints, &rp0) != 0) {
+		lprintf(LOG_ERR, "Address lookup for %s failed",
+			session->hostname);
+		return -1;
+	}
+
+	/* getaddrinfo() returns a list of address structures.
+	 * Try each address until we successfully connect(2).
+	 * If socket(2) (or connect(2)) fails, we (close the socket
+	 * and) try the next address. 
+	 */
+
+	session->ai_family = AF_UNSPEC;
+	for (rp = rp0; rp != NULL; rp = rp->ai_next) {
+		/* We are only interested in IPv4 and IPv6 */
+		if ((rp->ai_family != AF_INET6) && (rp->ai_family == AF_INET))
+			continue;
+
+		intf->fd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+		if (intf->fd == -1)
+			continue;
+
+		if (rp->ai_family == AF_INET) {
+			if (connect(intf->fd, rp->ai_addr, rp->ai_addrlen) != -1) {
+				memcpy(&session->addr, rp->ai_addr, rp->ai_addrlen);
+				session->addrlen = rp->ai_addrlen;
+				session->ai_family = rp->ai_family;
+				break;  /* Success */
+			}
+		} 
+
+		else if (rp->ai_family == AF_INET6) {
+			struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)rp->ai_addr;
+			char hbuf[NI_MAXHOST];
+			socklen_t len;
+
+			/* The scope was specified on the command line e.g. with -H FE80::219:99FF:FEA0:BD95%eth0 */
+			if ( addr6->sin6_scope_id != 0) {
+
+				len = sizeof(struct sockaddr_in6);
+				if ( getnameinfo((struct sockaddr *)addr6, len, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) == 0) {
+					lprintf(LOG_DEBUG, "Trying address: %s scope=%d", 
+						hbuf, 
+						addr6->sin6_scope_id);
+				}
+
+				if (connect(intf->fd, rp->ai_addr, rp->ai_addrlen) != -1) {
+					memcpy(&session->addr, rp->ai_addr, rp->ai_addrlen);
+					session->addrlen = rp->ai_addrlen;
+					session->ai_family = rp->ai_family;
+					break;  /* Success */
+				}
+
+			} else {
+				/* No scope specified, try to get this from the list of interfaces */
+				struct ifaddrs *ifaddrs = NULL;
+				struct ifaddrs *ifa = NULL;
+
+				if (getifaddrs(&ifaddrs) < 0) {
+					lprintf(LOG_ERR, "Interface address lookup for %s failed",
+						session->hostname);
+					break;
+				}
+
+				for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
+					if (ifa->ifa_addr == NULL)
+						continue;
+
+					if (ifa->ifa_addr->sa_family == AF_INET6) {
+						struct sockaddr_in6 *tmp6 = (struct sockaddr_in6 *)ifa->ifa_addr;
+
+						/* Skip unwanted addresses */
+						if (IN6_IS_ADDR_MULTICAST(&tmp6->sin6_addr))
+							continue;
+						if (IN6_IS_ADDR_LOOPBACK(&tmp6->sin6_addr))
+							continue;
+
+						len = sizeof(struct sockaddr_in6);
+						if ( getnameinfo((struct sockaddr *)tmp6, len, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) == 0) {
+							lprintf(LOG_DEBUG, "Testing %s interface address: %s scope=%d", 
+								ifa->ifa_name != NULL ? ifa->ifa_name : "???", 
+								hbuf, 
+								tmp6->sin6_scope_id);
+						}
+
+						if (tmp6->sin6_scope_id != 0) {
+							addr6->sin6_scope_id = tmp6->sin6_scope_id;
+						} else {
+							/* 
+							 * No scope information in interface address information 
+							 * On some OS'es, getifaddrs() is returning out the 'kernel' representation
+							 * of scoped addresses which stores the scope in the 3rd and 4th
+							 * byte. See also this page:
+							 * http://www.freebsd.org/doc/en/books/developers-handbook/ipv6.html
+							 */
+							if ( IN6_IS_ADDR_LINKLOCAL(&tmp6->sin6_addr)
+							&& ( tmp6->sin6_addr.s6_addr16[1] != 0 ) ) {
+								addr6->sin6_scope_id = ntohs(tmp6->sin6_addr.s6_addr16[1]);
+							}
+						}
+
+						/* OK, now try to connect with the scope id from this interface address */
+						if (addr6->sin6_scope_id != 0) {
+							if (connect(intf->fd, rp->ai_addr, rp->ai_addrlen) != -1) {
+								memcpy(&session->addr, rp->ai_addr, rp->ai_addrlen);
+								session->addrlen = rp->ai_addrlen;
+								session->ai_family = rp->ai_family;
+								lprintf(LOG_DEBUG, "Successful connected on %s interface with scope id %d", ifa->ifa_name, tmp6->sin6_scope_id);
+								break;  /* Success */
+							}
+						} 
+					}
+				}
+
+				freeifaddrs(ifaddrs);
+			}
+
+		}
+
+		if (session->ai_family != AF_UNSPEC)
+			break;
+
+		close(intf->fd);
+		intf->fd = -1;
+	}
+
+	/* No longer needed */
+	freeaddrinfo(rp0);
+
+	return ((intf->fd != -1) ? 0 : -1);
+}
+#endif
+

ipmitool/src/plugins/lan/lan.c

@@ -2032,44 +2032,14 @@ ipmi_lan_open(struct ipmi_intf * intf)
 
 	intf->session->sol_data.sequence_number = 1;
 	
-	/* open port to BMC */
-	memset(&s->addr, 0, sizeof(struct sockaddr_in));
-	s->addr.sin_family = AF_INET;
-	s->addr.sin_port = htons(s->port);
-
-	rc = inet_pton(AF_INET, (const char *)s->hostname, &s->addr.sin_addr);
-	if (rc <= 0) {
-		struct hostent *host = gethostbyname((const char *)s->hostname);
-		if (host == NULL) {
-			lprintf(LOG_ERR, "Address lookup for %s failed",
-				s->hostname);
-			return -1;
-		}
-		if (host->h_addrtype != AF_INET) {
-			lprintf(LOG_ERR,
-					"Address lookup for %s failed. Got %s, expected IPv4 address.",
-					s->hostname,
-					(host->h_addrtype == AF_INET6) ? "IPv6" : "Unknown");
-			return (-1);
-		}
-		s->addr.sin_family = host->h_addrtype;
-		memcpy(&s->addr.sin_addr, host->h_addr, host->h_length);
-	}
-
-	lprintf(LOG_DEBUG, "IPMI LAN host %s port %d",
-		s->hostname, ntohs(s->addr.sin_port));
-
-	intf->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-	if (intf->fd < 0) {
-		lperror(LOG_ERR, "Socket failed");
+	if (ipmi_intf_socket_connect (intf) == -1) {
+		lprintf(LOG_ERR, "Could not open socket!");
 		return -1;
 	}
 
-	/* connect to UDP socket so we get async errors */
-	rc = connect(intf->fd, (struct sockaddr *)&s->addr,
-		     sizeof(struct sockaddr_in));
-	if (rc < 0) {
-		lperror(LOG_ERR, "Connect failed");
+	if (intf->fd < 0) {
+		lperror(LOG_ERR, "Connect to %s failed",
+			s->hostname);
 		intf->close(intf);
 		return -1;
 	}

ipmitool/src/plugins/lanplus/lanplus.c

@@ -3334,7 +3334,6 @@ ipmi_lanplus_open(struct ipmi_intf * intf)
 {
 	int rc;
 	struct get_channel_auth_cap_rsp auth_cap;
-	struct sockaddr_in addr;
 	struct ipmi_session *session;
 
 	if (!intf || !intf->session)
@@ -3373,46 +3372,14 @@ ipmi_lanplus_open(struct ipmi_intf * intf)
 	/* Kg is set in ipmi_intf */
 	//memset(session->v2_data.kg,  0, IPMI_KG_BUFFER_SIZE);
 
-
-	/* open port to BMC */
-	memset(&addr, 0, sizeof(struct sockaddr_in));
-	addr.sin_family = AF_INET;
-	addr.sin_port = htons(session->port);
-
-	rc = inet_pton(AF_INET, (const char *)session->hostname, &addr.sin_addr);
-	if (rc <= 0) {
-		struct hostent *host = gethostbyname((const char *)session->hostname);
-		if (host == NULL) {
-			lprintf(LOG_ERR, "Address lookup for %s failed",
-				session->hostname);
-			return -1;
-		}
-		if (host->h_addrtype != AF_INET) {
-			lprintf(LOG_ERR,
-					"Address lookup for %s failed. Got %s, expected IPv4 address.",
-					session->hostname,
-					(host->h_addrtype == AF_INET6) ? "IPv6" : "Unknown");
-			return (-1);
-		}
-		addr.sin_family = host->h_addrtype;
-		memcpy(&addr.sin_addr, host->h_addr, host->h_length);
-	}
-
-	lprintf(LOG_DEBUG, "IPMI LAN host %s port %d",
-		session->hostname, ntohs(addr.sin_port));
-
-	intf->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-	if (intf->fd < 0) {
-		lperror(LOG_ERR, "Socket failed");
+	if (ipmi_intf_socket_connect (intf) == -1) {
+		lprintf(LOG_ERR, "Could not open socket!");
 		return -1;
 	}
 
-
-	/* connect to UDP socket so we get async errors */
-	rc = connect(intf->fd,
-				 (struct sockaddr *)&addr, sizeof(struct sockaddr_in));
-	if (rc < 0) {
-		lperror(LOG_ERR, "Connect failed");
+	if (intf->fd < 0) {
+		lperror(LOG_ERR, "Connect to %s failed",
+			session->hostname);
 		intf->close(intf);
 		return -1;
 	}