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-rw-r--r--src/include/pcap.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/include/pcap.h b/src/include/pcap.h
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+++ b/src/include/pcap.h
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+#ifndef FR_PCAP_H
+#define FR_PCAP_H
+#ifdef HAVE_LIBPCAP
+/*
+ * This program is is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 of the
+ * License 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/**
+ * $Id$
+ * @file include/pcap.h
+ * @brief Prototypes and constants for PCAP functions.
+ *
+ * @author Arran Cudbard-Bell <a.cudbardb@freeradius.org>
+ * @copyright 2013 Arran Cudbard-Bell <a.cudbardb@freeradius.org>
+ */
+#include <freeradius-devel/libradius.h>
+#include <freeradius-devel/net.h>
+
+#include <sys/types.h>
+#include <pcap.h>
+
+#define SNAPLEN ETHER_HDR_LEN + IP_HDR_LEN + sizeof(struct udp_header) + MAX_RADIUS_LEN
+#define PCAP_BUFFER_DEFAULT (10000)
+/*
+ * It's unclear why this differs between platforms
+ */
+#ifndef __linux__
+# define PCAP_NONBLOCK_TIMEOUT (0)
+#else
+# define PCAP_NONBLOCK_TIMEOUT (-1)
+#endif
+
+#ifndef BIOCIMMEDIATE
+# define BIOCIMMEDIATE (2147762800)
+#endif
+
+/*
+ * Older versions of libpcap don't define this
+ */
+#ifndef PCAP_NETMASK_UNKNOWN
+# define PCAP_NETMASK_UNKNOWN 0
+#endif
+
+typedef enum {
+ PCAP_INVALID = 0,
+ PCAP_INTERFACE_IN,
+ PCAP_FILE_IN,
+ PCAP_STDIO_IN,
+ PCAP_INTERFACE_OUT,
+ PCAP_FILE_OUT,
+ PCAP_STDIO_OUT
+} fr_pcap_type_t;
+
+extern const FR_NAME_NUMBER pcap_types[];
+
+/*
+ * Internal pcap structures
+ */
+typedef struct fr_pcap fr_pcap_t;
+struct fr_pcap {
+ char errbuf[PCAP_ERRBUF_SIZE]; //!< Last error on this interface.
+ fr_pcap_type_t type; //!< What type of handle this is.
+ char *name; //!< Name of file or interface.
+ bool promiscuous; //!< Whether the interface is in promiscuous mode.
+ //!< Only valid for live capture handles.
+ int buffer_pkts; //!< How big to make the PCAP ring buffer.
+ //!< Actual buffer size is SNAPLEN * buffer.
+ //!< Only valid for live capture handles.
+
+ pcap_t *handle; //!< libpcap handle.
+ pcap_dumper_t *dumper; //!< libpcap dumper handle.
+
+ int link_layer; //!< Link layer type.
+
+ int fd; //!< Selectable file descriptor we feed to select.
+ struct pcap_stat pstats; //!< The last set of pcap stats for this handle.
+
+ fr_pcap_t *next; //!< Next handle in collection.
+};
+
+int fr_pcap_if_link_layer(char *errbuff, pcap_if_t *dev);
+fr_pcap_t *fr_pcap_init(TALLOC_CTX *ctx, char const *name, fr_pcap_type_t type);
+int fr_pcap_open(fr_pcap_t *handle);
+int fr_pcap_apply_filter(fr_pcap_t *handle, char const *expression);
+char *fr_pcap_device_names(TALLOC_CTX *ctx, fr_pcap_t *handle, char c);
+
+bool fr_pcap_link_layer_supported(int link_layer);
+ssize_t fr_pcap_link_layer_offset(uint8_t const *data, size_t len, int link_layer);
+#endif
+#endif