Remove obsolete patches and files and move ulogd to repository top-level directory

1 files changed, 256 insertions, 0 deletions

diff --git a/libipulog/libipulog.c b/libipulog/libipulog.c
new file mode 100644
index 0000000..415b712
--- /dev/null
+++ b/libipulog/libipulog.c
@@ -0,0 +1,256 @@
+/* 
+ * libipulog.c, $Revision$
+ *
+ * netfilter ULOG userspace library.
+ *
+ * (C) 2000-2001 by Harald Welte <laforge@gnumonks.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 
+ *  as published by the Free Software Foundation
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * This library is still under development, so be aware of sudden interface
+ * changes
+ *
+ * $Id$
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <net/if.h>
+#include <libipulog/libipulog.h>
+
+struct ipulog_handle
+{
+	int fd;
+	u_int8_t blocking;
+	struct sockaddr_nl local;
+	struct sockaddr_nl peer;
+	struct nlmsghdr* last_nlhdr;
+};
+
+/* internal */
+
+
+int ipulog_errno = IPULOG_ERR_NONE;
+
+struct ipulog_errmap_t 
+{
+	int errcode;
+	char *message;
+} ipulog_errmap[] = 
+{
+	{ IPULOG_ERR_NONE, "No error" },
+	{ IPULOG_ERR_IMPL, "Not implemented yet" },
+	{ IPULOG_ERR_HANDLE, "Unable to create netlink handle" },
+	{ IPULOG_ERR_SOCKET, "Unable to create netlink socket" },
+	{ IPULOG_ERR_BIND, "Unable to bind netlink socket" },
+	{ IPULOG_ERR_RECVBUF, "Receive buffer size invalid" },
+	{ IPULOG_ERR_RECV, "Error during netlink receive" },
+	{ IPULOG_ERR_NLEOF, "Received EOF on netlink socket" },
+	{ IPULOG_ERR_TRUNC, "Receive message truncated" },
+	{ IPULOG_ERR_INVGR, "Invalid group specified" },
+	{ IPULOG_ERR_INVNL, "Invalid netlink message" },
+};
+
+static ssize_t 
+ipulog_netlink_recvfrom(const struct ipulog_handle *h,
+			unsigned char *buf, size_t len)
+{
+	socklen_t addrlen;
+	int status;
+	struct nlmsghdr *nlh;
+	
+	if (len < sizeof(struct nlmsgerr)) {
+		ipulog_errno = IPULOG_ERR_RECVBUF;
+		return -1; 
+	}
+	addrlen = sizeof(h->peer);
+	status = recvfrom(h->fd, buf, len, 0, (struct sockaddr *)&h->peer,	
+			&addrlen);
+	if (status < 0) {
+		ipulog_errno = IPULOG_ERR_RECV;
+		return status;
+	}
+	if (addrlen != sizeof (h->peer)) {
+		ipulog_errno = IPULOG_ERR_RECV;
+		return -1;
+	}	
+	if (h->peer.nl_pid != 0) {
+		ipulog_errno = IPULOG_ERR_RECV;
+		return -1;
+	}
+	if (status == 0) {
+		ipulog_errno = IPULOG_ERR_NLEOF;
+		return -1;
+	}
+	nlh = (struct nlmsghdr *)buf;
+	if (nlh->nlmsg_flags & MSG_TRUNC || status > len) {
+		ipulog_errno = IPULOG_ERR_TRUNC;
+		return -1;
+	}
+	return status;
+}
+
+/* public */
+
+char *ipulog_strerror(int errcode)
+{
+	if (errcode < 0 || errcode > IPULOG_MAXERR)
+		errcode = IPULOG_ERR_IMPL;
+	return ipulog_errmap[errcode].message;
+}
+
+/* convert a netlink group (1-32) to a group_mask suitable for create_handle */
+u_int32_t ipulog_group2gmask(u_int32_t group)
+{
+	if (group < 1 || group > 32)
+	{
+		ipulog_errno = IPULOG_ERR_INVGR;
+		return 0;
+	}
+	return (1 << (group - 1));
+}
+
+/* create a ipulog handle for the reception of packets sent to gmask */
+struct ipulog_handle *ipulog_create_handle(u_int32_t gmask, 
+					   u_int32_t rcvbufsize)
+{
+	struct ipulog_handle *h;
+	int status;
+
+	h = (struct ipulog_handle *) malloc(sizeof(struct ipulog_handle));
+	if (h == NULL)
+	{
+		ipulog_errno = IPULOG_ERR_HANDLE;
+		return NULL;
+	}
+	memset(h, 0, sizeof(struct ipulog_handle));
+	h->fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_NFLOG);
+	if (h->fd == -1)
+	{
+		ipulog_errno = IPULOG_ERR_SOCKET;
+		close(h->fd);
+		free(h);
+		return NULL;
+	}
+	memset(&h->local, 0, sizeof(struct sockaddr_nl));
+	h->local.nl_family = AF_NETLINK;
+	h->local.nl_pid = getpid();
+	h->local.nl_groups = gmask;
+	status = bind(h->fd, (struct sockaddr *)&h->local, sizeof(h->local));
+	if (status == -1)
+	{
+		ipulog_errno = IPULOG_ERR_BIND;
+		close(h->fd);
+		free(h);
+		return NULL;
+	}
+	memset(&h->peer, 0, sizeof(struct sockaddr_nl));
+	h->peer.nl_family = AF_NETLINK;
+	h->peer.nl_pid = 0;
+	h->peer.nl_groups = gmask;
+
+	status = setsockopt(h->fd, SOL_SOCKET, SO_RCVBUF, &rcvbufsize,
+			    sizeof(rcvbufsize));
+	if (status == -1)
+	{
+		ipulog_errno = IPULOG_ERR_RECVBUF;
+		close(h->fd);
+		free(h);
+		return NULL;
+	}
+
+	return h;
+} 
+
+/* destroy a ipulog handle */
+void ipulog_destroy_handle(struct ipulog_handle *h)
+{
+	close(h->fd);
+	free(h);
+}
+
+#if 0
+int ipulog_set_mode()
+{
+}
+#endif
+
+/* do a BLOCKING read on an ipulog handle */
+ssize_t ipulog_read(struct ipulog_handle *h, unsigned char *buf,
+		    size_t len, int timeout)
+{
+	return ipulog_netlink_recvfrom(h, buf, len);
+}
+
+/* get a pointer to the actual start of the ipulog packet,
+   use this to strip netlink header */
+ulog_packet_msg_t *ipulog_get_packet(struct ipulog_handle *h,
+				     const unsigned char *buf, 
+				     size_t len)
+{
+	struct nlmsghdr *nlh;
+	size_t remain_len;
+
+	/* if last header in handle not inside this buffer,
+	 * drop reference to last header */
+	if ((unsigned char *)h->last_nlhdr > (buf + len) || 
+	    (unsigned char *)h->last_nlhdr < buf) {
+		h->last_nlhdr = NULL;
+	}
+	
+	if (!h->last_nlhdr) {
+		/* fist message in buffer */
+		nlh = (struct nlmsghdr *) buf;
+		if (!NLMSG_OK(nlh, len)) {
+			/* ERROR */
+			ipulog_errno = IPULOG_ERR_INVNL;
+			return NULL;
+		}
+	} else {
+		/* we are in n-th part of multilink message */
+		if (h->last_nlhdr->nlmsg_type == NLMSG_DONE ||
+		    !(h->last_nlhdr->nlmsg_flags & NLM_F_MULTI)) {
+			/* if last part in multilink message, 
+			 * or no multipart message at all: return */
+			h->last_nlhdr = NULL;
+			return NULL;
+		}
+
+		/* calculate remaining lenght from lasthdr to end of buffer */
+		remain_len = (len - 
+				((unsigned char *)h->last_nlhdr - buf));
+		nlh = NLMSG_NEXT(h->last_nlhdr, remain_len);
+	}
+
+	h->last_nlhdr = nlh;
+
+	return NLMSG_DATA(nlh);
+}
+
+/* print a human readable description of the last error to stderr */
+void ipulog_perror(const char *s)
+{
+	if (s)
+		fputs(s, stderr);
+	else
+		fputs("ERROR", stderr);
+	if (ipulog_errno)
+		fprintf(stderr, ": %s", ipulog_strerror(ipulog_errno));
+	if (errno)
+		fprintf(stderr, ": %s", strerror(errno));
+	fputc('\n', stderr);
+}
+