Build the extcap programs in the extcap directory.

That lets the version of Wireshark built with autotools find the extcap
programs.

Don't install the extcap programs under ${datadir} - that puts it under
a share directory, and share directories are for platform-independent
files, which executable images aren't (they're instruction-set
dependent, hence platform-dependent).

Change-Id: I992eeb984bdbe6b3476777f7114628c83df6080f
Reviewed-on: https://code.wireshark.org/review/13943
Reviewed-by: Guy Harris <guy@alum.mit.edu>

1 files changed, 813 insertions, 0 deletions

diff --git a/randpkt_core/randpkt_core.c b/randpkt_core/randpkt_core.c
new file mode 100644
index 0000000000..c329dc627d
--- /dev/null
+++ b/randpkt_core/randpkt_core.c
@@ -0,0 +1,813 @@
+/*
+ * randpkt_core.c
+ * ---------
+ * Creates random packet traces. Useful for debugging sniffers by testing
+ * assumptions about the veracity of the data found in the packet.
+ *
+ * Copyright (C) 1999 by Gilbert Ramirez <gram@alumni.rice.edu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "randpkt_core.h"
+
+#include <config.h>
+
+#include <time.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include "wsutil/file_util.h"
+
+#ifdef _WIN32
+#include <wsutil/unicode-utils.h>
+#endif /* _WIN32 */
+
+#define array_length(x)	(sizeof x / sizeof x[0])
+
+/* Types of produceable packets */
+enum {
+	PKT_ARP,
+	PKT_BGP,
+	PKT_BVLC,
+	PKT_DNS,
+	PKT_ETHERNET,
+	PKT_FDDI,
+	PKT_GIOP,
+	PKT_ICMP,
+	PKT_IP,
+	PKT_LLC,
+	PKT_M2M,
+	PKT_MEGACO,
+	PKT_NBNS,
+	PKT_NCP2222,
+	PKT_SCTP,
+	PKT_SYSLOG,
+	PKT_TCP,
+	PKT_TDS,
+	PKT_TR,
+	PKT_UDP,
+	PKT_USB,
+	PKT_USB_LINUX
+};
+
+/* Ethernet, indicating ARP */
+guint8 pkt_arp[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x00, 0x00,
+	0x32, 0x25, 0x0f, 0xff,
+	0x08, 0x06
+};
+
+/* Ethernet+IP+UDP, indicating DNS */
+guint8 pkt_dns[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x3c,
+	0xc5, 0x9e, 0x40, 0x00,
+	0xff, 0x11, 0xd7, 0xe0,
+	0xd0, 0x15, 0x02, 0xb8,
+	0x0a, 0x01, 0x01, 0x63,
+
+	0x05, 0xe8, 0x00, 0x35,
+	0xff, 0xff, 0x2a, 0xb9,
+	0x30
+};
+
+/* Ethernet+IP, indicating ICMP */
+guint8 pkt_icmp[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x54,
+	0x8f, 0xb3, 0x40, 0x00,
+	0xfd, 0x01, 0x8a, 0x99,
+	0xcc, 0xfc, 0x66, 0x0b,
+	0xce, 0x41, 0x62, 0x12
+};
+
+/* Ethernet, indicating IP */
+guint8 pkt_ip[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00
+};
+
+/* TR, indicating LLC */
+guint8 pkt_llc[] = {
+	0x10, 0x40, 0x68, 0x00,
+	0x19, 0x69, 0x95, 0x8b,
+	0x00, 0x01, 0xfa, 0x68,
+	0xc4, 0x67
+};
+
+/* Ethernet, indicating WiMAX M2M */
+guint8 pkt_m2m[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x00, 0x00,
+	0x32, 0x25, 0x0f, 0xff,
+	0x08, 0xf0
+};
+
+/* Ethernet+IP+UDP, indicating NBNS */
+guint8 pkt_nbns[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x3c,
+	0xc5, 0x9e, 0x40, 0x00,
+	0xff, 0x11, 0xd7, 0xe0,
+	0xd0, 0x15, 0x02, 0xb8,
+	0x0a, 0x01, 0x01, 0x63,
+
+	0x00, 0x89, 0x00, 0x89,
+	0x00, 0x00, 0x2a, 0xb9,
+	0x30
+};
+
+/* Ethernet+IP+UDP, indicating syslog */
+guint8 pkt_syslog[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x64,
+	0x20, 0x48, 0x00, 0x00,
+	0xfc, 0x11, 0xf8, 0x03,
+	0xd0, 0x15, 0x02, 0xb8,
+	0x0a, 0x01, 0x01, 0x63,
+
+	0x05, 0xe8, 0x02, 0x02,
+	0x00, 0x50, 0x51, 0xe1,
+	0x3c
+};
+
+/* TR+LLC+IP, indicating TCP */
+guint8 pkt_tcp[] = {
+	0x10, 0x40, 0x68, 0x00,
+	0x19, 0x69, 0x95, 0x8b,
+	0x00, 0x01, 0xfa, 0x68,
+	0xc4, 0x67,
+
+	0xaa, 0xaa, 0x03, 0x00,
+	0x00, 0x00, 0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x28,
+	0x0b, 0x0b, 0x40, 0x00,
+	0x20, 0x06, 0x85, 0x37,
+	0xc0, 0xa8, 0x27, 0x01,
+	0xc0, 0xa8, 0x22, 0x3c
+};
+
+/* Ethernet+IP, indicating UDP */
+guint8 pkt_udp[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x3c,
+	0xc5, 0x9e, 0x40, 0x00,
+	0xff, 0x11, 0xd7, 0xe0,
+	0xd0, 0x15, 0x02, 0xb8,
+	0x0a, 0x01, 0x01, 0x63
+};
+
+/* Ethernet+IP+UDP, indicating BVLC */
+guint8 pkt_bvlc[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x3c,
+	0xc5, 0x9e, 0x40, 0x00,
+	0xff, 0x11, 0x01, 0xaa,
+	0xc1, 0xff, 0x19, 0x1e,
+	0xc1, 0xff, 0x19, 0xff,
+	0xba, 0xc0, 0xba, 0xc0,
+	0x00, 0xff, 0x2d, 0x5e,
+	0x81
+};
+
+/* TR+LLC+IPX, indicating NCP, with NCP Type == 0x2222 */
+guint8 pkt_ncp2222[] = {
+	0x10, 0x40, 0x00, 0x00,
+	0xf6, 0x7c, 0x9b, 0x70,
+	0x68, 0x00, 0x19, 0x69,
+	0x95, 0x8b, 0xe0, 0xe0,
+	0x03, 0xff, 0xff, 0x00,
+	0x25, 0x02, 0x11, 0x00,
+	0x00, 0x74, 0x14, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x01, 0x04, 0x51, 0x00,
+	0x00, 0x00, 0x04, 0x00,
+	0x02, 0x16, 0x19, 0x7a,
+	0x84, 0x40, 0x01, 0x22,
+	0x22
+};
+
+/* Ethernet+IP+TCP, indicating GIOP */
+guint8 pkt_giop[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0xa6,
+	0x00, 0x2f, 0x40, 0x00,
+	0x40, 0x06, 0x3c, 0x21,
+	0x7f, 0x00, 0x00, 0x01,
+	0x7f, 0x00, 0x00, 0x01,
+
+	0x30, 0x39, 0x04, 0x05,
+	0xac, 0x02, 0x1e, 0x69,
+	0xab, 0x74, 0xab, 0x64,
+	0x80, 0x18, 0x79, 0x60,
+	0xc4, 0xb8, 0x00, 0x00,
+	0x01, 0x01, 0x08, 0x0a,
+	0x00, 0x00, 0x48, 0xf5,
+	0x00, 0x00, 0x48, 0xf5,
+
+	0x47, 0x49, 0x4f, 0x50,
+	0x01, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x30,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x01,
+	0x01
+};
+
+/* Ethernet+IP+TCP, indicating BGP */
+guint8 pkt_bgp[] = {
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0x01, 0x01,
+	0x01, 0x01, 0x01, 0x01,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0xa6,
+	0x00, 0x2f, 0x40, 0x00,
+	0x40, 0x06, 0x3c, 0x21,
+	0x7f, 0x00, 0x00, 0x01,
+	0x7f, 0x00, 0x00, 0x01,
+
+	0x30, 0x39, 0x00, 0xb3,
+	0xac, 0x02, 0x1e, 0x69,
+	0xab, 0x74, 0xab, 0x64,
+	0x80, 0x18, 0x79, 0x60,
+	0xc4, 0xb8, 0x00, 0x00,
+	0x01, 0x01, 0x08, 0x0a,
+	0x00, 0x00, 0x48, 0xf5,
+	0x00, 0x00, 0x48, 0xf5,
+
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff,
+};
+
+/* Ethernet+IP+TCP, indicating TDS NetLib */
+guint8 pkt_tds[] = {
+	0x00, 0x50, 0x8b, 0x0d,
+	0x7a, 0xed, 0x00, 0x08,
+	0xa3, 0x98, 0x39, 0x81,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x03, 0x8d,
+	0x90, 0xd4, 0x40, 0x00,
+	0x7c, 0x06, 0xc3, 0x1b,
+	0xac, 0x14, 0x02, 0x22,
+	0x0a, 0xc2, 0xee, 0x82,
+
+	0x05, 0x99, 0x08, 0xf8,
+	0xff, 0x4e, 0x85, 0x46,
+	0xa2, 0xb4, 0x42, 0xaa,
+	0x50, 0x18, 0x3c, 0x28,
+	0x0f, 0xda, 0x00, 0x00,
+};
+
+/* Ethernet+IP, indicating SCTP */
+guint8 pkt_sctp[] = {
+	0x00, 0xa0, 0x80, 0x00,
+	0x5e, 0x46, 0x08, 0x00,
+	0x03, 0x4a, 0x00, 0x35,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x7c,
+	0x14, 0x1c, 0x00, 0x00,
+	0x3b, 0x84, 0x4a, 0x54,
+	0x0a, 0x1c, 0x06, 0x2b,
+	0x0a, 0x1c, 0x06, 0x2c,
+};
+
+
+/* Ethernet+IP+SCTP, indicating MEGACO */
+guint8 pkt_megaco[] = {
+	0x00, 0xa0, 0x80, 0x00,
+	0x5e, 0x46, 0x08, 0x00,
+	0x03, 0x4a, 0x00, 0x35,
+	0x08, 0x00,
+
+	0x45, 0x00, 0x00, 0x7c,
+	0x14, 0x1c, 0x00, 0x00,
+	0x3b, 0x84, 0x4a, 0x54,
+	0x0a, 0x1c, 0x06, 0x2b,
+	0x0a, 0x1c, 0x06, 0x2c,
+
+	0x40, 0x00, 0x0b, 0x80,
+	0x00, 0x01, 0x6f, 0x0a,
+	0x6d, 0xb0, 0x18, 0x82,
+	0x00, 0x03, 0x00, 0x5b,
+	0x28, 0x02, 0x43, 0x45,
+	0x00, 0x00, 0xa0, 0xbd,
+	0x00, 0x00, 0x00, 0x07,
+};
+
+/* This little data table drives the whole program */
+static randpkt_example examples[] = {
+	{ "arp", "Address Resolution Protocol",
+		PKT_ARP,	WTAP_ENCAP_ETHERNET,
+		pkt_arp,	array_length(pkt_arp),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "bgp", "Border Gateway Protocol",
+		PKT_BGP,	WTAP_ENCAP_ETHERNET,
+		pkt_bgp,	array_length(pkt_bgp),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "bvlc", "BACnet Virtual Link Control",
+		PKT_BVLC,	WTAP_ENCAP_ETHERNET,
+		pkt_bvlc,	array_length(pkt_bvlc),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "dns", "Domain Name Service",
+		PKT_DNS,	WTAP_ENCAP_ETHERNET,
+		pkt_dns,	array_length(pkt_dns),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "eth", "Ethernet",
+		PKT_ETHERNET,	WTAP_ENCAP_ETHERNET,
+		NULL,		0,
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "fddi", "Fiber Distributed Data Interface",
+		PKT_FDDI,	WTAP_ENCAP_FDDI,
+		NULL,		0,
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "giop", "General Inter-ORB Protocol",
+		PKT_GIOP,	WTAP_ENCAP_ETHERNET,
+		pkt_giop,	array_length(pkt_giop),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "icmp", "Internet Control Message Protocol",
+		PKT_ICMP,	WTAP_ENCAP_ETHERNET,
+		pkt_icmp,	array_length(pkt_icmp),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "ip", "Internet Protocol",
+		PKT_IP,		WTAP_ENCAP_ETHERNET,
+		pkt_ip,		array_length(pkt_ip),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "llc", "Logical Link Control",
+		PKT_LLC,	WTAP_ENCAP_TOKEN_RING,
+		pkt_llc,	array_length(pkt_llc),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "m2m", "WiMAX M2M Encapsulation Protocol",
+		PKT_M2M,	WTAP_ENCAP_ETHERNET,
+		pkt_m2m,	array_length(pkt_m2m),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "megaco", "MEGACO",
+		PKT_MEGACO,	WTAP_ENCAP_ETHERNET,
+		pkt_megaco,	array_length(pkt_megaco),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "nbns", "NetBIOS-over-TCP Name Service",
+		PKT_NBNS,	WTAP_ENCAP_ETHERNET,
+		pkt_nbns,	array_length(pkt_nbns),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "ncp2222", "NetWare Core Protocol",
+		PKT_NCP2222,	WTAP_ENCAP_TOKEN_RING,
+		pkt_ncp2222,	array_length(pkt_ncp2222),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "sctp", "Stream Control Transmission Protocol",
+		PKT_SCTP,	WTAP_ENCAP_ETHERNET,
+		pkt_sctp,	array_length(pkt_sctp),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "syslog", "Syslog message",
+		PKT_SYSLOG,	WTAP_ENCAP_ETHERNET,
+		pkt_syslog,	array_length(pkt_syslog),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "tds", "TDS NetLib",
+		PKT_TDS,	WTAP_ENCAP_ETHERNET,
+		pkt_tds,	array_length(pkt_tds),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "tcp", "Transmission Control Protocol",
+		PKT_TCP,	WTAP_ENCAP_TOKEN_RING,
+		pkt_tcp,	array_length(pkt_tcp),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "tr",	 "Token-Ring",
+		PKT_TR,		WTAP_ENCAP_TOKEN_RING,
+		NULL,		0,
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "udp", "User Datagram Protocol",
+		PKT_UDP,	WTAP_ENCAP_ETHERNET,
+		pkt_udp,	array_length(pkt_udp),
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "usb", "Universal Serial Bus",
+		PKT_USB,	WTAP_ENCAP_USB,
+		NULL,		0,
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+	{ "usb-linux", "Universal Serial Bus with Linux specific header",
+		PKT_USB_LINUX,	WTAP_ENCAP_USB_LINUX,
+		NULL,		0,
+		NULL,		0,
+		NULL,		NULL,
+		1000,
+	},
+
+};
+
+guint randpkt_example_count(void)
+{
+	return array_length(examples);
+}
+
+/* Find pkt_example record and return pointer to it */
+randpkt_example* randpkt_find_example(int type)
+{
+	int	num_entries = array_length(examples);
+	int	i;
+
+	for (i = 0; i < num_entries; i++) {
+		if (examples[i].produceable_type == type) {
+			return &examples[i];
+		}
+	}
+
+	fprintf(stderr, "randpkt: Internal error. Type %d has no entry in examples table.\n",
+	    type);
+	return NULL;
+}
+
+void randpkt_loop(randpkt_example* example, guint64 produce_count)
+{
+	guint i;
+	int j;
+	int err;
+	int len_random;
+	int len_this_pkt;
+	gchar* err_info;
+	union wtap_pseudo_header* ps_header;
+	guint8 buffer[65536];
+	struct wtap_pkthdr* pkthdr;
+
+	pkthdr = g_new0(struct wtap_pkthdr, 1);
+
+	pkthdr->rec_type = REC_TYPE_PACKET;
+	pkthdr->presence_flags = WTAP_HAS_TS;
+	pkthdr->pkt_encap = example->sample_wtap_encap;
+
+	memset(pkthdr, 0, sizeof(struct wtap_pkthdr));
+	memset(buffer, 0, sizeof(buffer));
+
+	ps_header = &pkthdr->pseudo_header;
+
+	/* Load the sample pseudoheader into our pseudoheader buffer */
+	if (example->pseudo_buffer)
+		memcpy(ps_header, example->pseudo_buffer, example->pseudo_length);
+
+	/* Load the sample into our buffer */
+	if (example->sample_buffer)
+		memcpy(buffer, example->sample_buffer, example->sample_length);
+
+	/* Produce random packets */
+	for (i = 0; i < produce_count; i++) {
+		if (example->produce_max_bytes > 0) {
+			len_random = (rand() % example->produce_max_bytes + 1);
+		}
+		else {
+			len_random = 0;
+		}
+
+		len_this_pkt = example->sample_length + len_random;
+
+		pkthdr->caplen = len_this_pkt;
+		pkthdr->len = len_this_pkt;
+		pkthdr->ts.secs = i; /* just for variety */
+
+		for (j = example->pseudo_length; j < (int) sizeof(*ps_header); j++) {
+			((guint8*)ps_header)[j] = (rand() % 0x100);
+		}
+
+		for (j = example->sample_length; j < len_this_pkt; j++) {
+			/* Add format strings here and there */
+			if ((int) (100.0*rand()/(RAND_MAX+1.0)) < 3 && j < (len_random - 3)) {
+				memcpy(&buffer[j], "%s", 3);
+				j += 2;
+			} else {
+				buffer[j] = (rand() % 0x100);
+			}
+		}
+
+		if (!wtap_dump(example->dump, pkthdr, buffer, &err, &err_info)) {
+			fprintf(stderr, "randpkt: Error writing to %s: %s\n",
+			    example->filename, wtap_strerror(err));
+			switch (err) {
+
+			case WTAP_ERR_UNWRITABLE_ENCAP:
+				/*
+				 * This is a problem with the particular
+				 * frame we're writing and the file type
+				 * and subtype we're writing; note that,
+				 * and report the file type/subtype.
+				 */
+				fprintf(stderr,
+				    "Frame has a network type that can't be saved in a \"%s\" file.\n",
+				    wtap_file_type_subtype_short_string(WTAP_FILE_TYPE_SUBTYPE_PCAP));
+				break;
+
+			case WTAP_ERR_PACKET_TOO_LARGE:
+				/*
+				 * This is a problem with the particular
+				 * frame we're writing and the file type
+				 * and subtype we're writing; note that,
+				 * and report the file type/subtype.
+				 */
+				fprintf(stderr,
+					"Frame is too large for a \"%s\" file.\n",
+					wtap_file_type_subtype_short_string(WTAP_FILE_TYPE_SUBTYPE_PCAP));
+				break;
+
+			case WTAP_ERR_UNWRITABLE_REC_TYPE:
+				/*
+				 * This is a problem with the particular
+				 * record we're writing and the file type
+				 * and subtype we're writing; note that,
+				 * and report the file type/subtype.
+				 */
+				fprintf(stderr,
+					"Record has a record type that can't be saved in a \"%s\" file.\n",
+					wtap_file_type_subtype_short_string(WTAP_FILE_TYPE_SUBTYPE_PCAP));
+				break;
+
+			case WTAP_ERR_UNWRITABLE_REC_DATA:
+				/*
+				 * This is a problem with the particular
+				 * record we're writing and the file type
+				 * and subtype we're writing; note that,
+				 * and report the file type/subtype.
+				 */
+				fprintf(stderr,
+					"Record has data that can't be saved in a \"%s\" file.\n(%s)\n",
+					wtap_file_type_subtype_short_string(WTAP_FILE_TYPE_SUBTYPE_PCAP),
+					err_info != NULL ? err_info : "no information supplied");
+				g_free(err_info);
+				break;
+
+			default:
+				break;
+			}
+		}
+	}
+
+	g_free(pkthdr);
+}
+
+gboolean randpkt_example_close(randpkt_example* example)
+{
+	int err;
+
+	if (!wtap_dump_close(example->dump, &err)) {
+		fprintf(stderr, "Error writing to %s: %s\n",
+			example->filename, wtap_strerror(err));
+		return FALSE;
+	}
+	return TRUE;
+}
+
+void randpkt_example_init(randpkt_example* example, char* produce_filename, int produce_max_bytes)
+{
+	int err;
+
+	if (strcmp(produce_filename, "-") == 0) {
+		/* Write to the standard output. */
+		example->dump = wtap_dump_open_stdout(WTAP_FILE_TYPE_SUBTYPE_PCAP,
+			example->sample_wtap_encap, produce_max_bytes, FALSE /* compressed */, &err);
+		example->filename = "the standard output";
+	} else {
+		example->dump = wtap_dump_open(produce_filename, WTAP_FILE_TYPE_SUBTYPE_PCAP,
+			example->sample_wtap_encap, produce_max_bytes, FALSE /* compressed */, &err);
+		example->filename = produce_filename;
+	}
+	if (!example->dump) {
+		fprintf(stderr, "randpkt: Error writing to %s\n", example->filename);
+		exit(2);
+	}
+
+	/* reduce max_bytes by # of bytes already in sample */
+	if (produce_max_bytes <= example->sample_length) {
+		fprintf(stderr, "randpkt: Sample packet length is %d, which is greater than "
+			"or equal to\n", example->sample_length);
+		fprintf(stderr, "your requested max_bytes value of %d\n", produce_max_bytes);
+		exit(1);
+	} else {
+		example->produce_max_bytes = produce_max_bytes - example->sample_length;
+	}
+}
+
+/* Seed the random-number generator */
+void
+randpkt_seed(void)
+{
+	unsigned int	randomness;
+	time_t		now;
+#ifndef _WIN32
+	int 		fd;
+	ssize_t		ret;
+
+#define RANDOM_DEV "/dev/urandom"
+
+	/*
+	 * Assume it's at least worth trying /dev/urandom on UN*X.
+	 * If it doesn't exist, fall back on time().
+	 *
+	 * XXX - Use CryptGenRandom on Windows?
+	 */
+	fd = ws_open(RANDOM_DEV, O_RDONLY);
+	if (fd == -1) {
+		if (errno != ENOENT) {
+			fprintf(stderr,
+				"randpkt: Could not open " RANDOM_DEV " for reading: %s\n",
+				g_strerror(errno));
+			exit(2);
+		}
+		goto fallback;
+	}
+
+	ret = ws_read(fd, &randomness, sizeof randomness);
+	if (ret == -1) {
+		fprintf(stderr,
+			"randpkt: Could not read from " RANDOM_DEV ": %s\n",
+			g_strerror(errno));
+		exit(2);
+	}
+	if ((size_t)ret != sizeof randomness) {
+		fprintf(stderr,
+			"randpkt: Tried to read %lu bytes from " RANDOM_DEV ", got %ld\n",
+			(unsigned long)sizeof randomness, (long)ret);
+		exit(2);
+	}
+	srand(randomness);
+	ws_close(fd);
+	return;
+
+fallback:
+#endif
+	now = time(NULL);
+	randomness = (unsigned int) now;
+
+	srand(randomness);
+}
+
+/* Parse command-line option "type" and return enum type */
+int randpkt_parse_type(char *string)
+{
+	int	num_entries = array_length(examples);
+	int	i;
+
+	/* Called with NULL, choose a random packet */
+	if (!string) {
+		return examples[rand() % num_entries].produceable_type;
+	}
+
+	for (i = 0; i < num_entries; i++) {
+		if (g_strcmp0(examples[i].abbrev, string) == 0) {
+			return examples[i].produceable_type;
+		}
+	}
+
+	/* Complain */
+	fprintf(stderr, "randpkt: Type %s not known.\n", string);
+	return -1;
+}
+
+void randpkt_example_list(const char*** abbrev_list, const char*** longname_list, unsigned* list_num)
+{
+	unsigned i;
+	*list_num = randpkt_example_count();
+	*abbrev_list = g_new0(const char*, *list_num);
+	*longname_list = g_new0(const char*, *list_num);
+	for (i = 0; i < *list_num; i++) {
+		(*abbrev_list)[i] = examples[i].abbrev;
+		(*longname_list)[i] = examples[i].longname;
+	}
+}
+
+/*
+ * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=4 noexpandtab:
+ * :indentSize=4:tabSize=4:noTabs=false:
+ */