From d386a9984b3e3ba30efafb4bfbac187c654fc26d Mon Sep 17 00:00:00 2001
From: XANTRONIX Development <dev@xantronix.com>
Date: Sun, 16 Dec 2018 11:37:04 -0600
Subject: [PATCH] Initial commit of examples/

---
 examples/Makefile   | 20 ++++++++++++
 examples/pcapread.c | 76 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 96 insertions(+)
 create mode 100644 examples/Makefile
 create mode 100644 examples/pcapread.c

diff --git a/examples/Makefile b/examples/Makefile
new file mode 100644
index 0000000..b4daf89
--- /dev/null
+++ b/examples/Makefile
@@ -0,0 +1,20 @@
+include ../mk/build.mk
+
+CC		= $(CROSS)cc
+
+INCLUDE_PATH	= ../include
+
+CFLAGS		+= -I$(INCLUDE_PATH)
+LDFLAGS		= -L../src -lhexagram
+
+EXAMPLES	= pcapread
+
+RM		= /bin/rm
+
+all: $(EXAMPLES)
+
+$(EXAMPLES): %: %.c
+	$(CC) $(CFLAGS) ../src/libhexagram.a $< -o $@
+
+clean:
+	$(RM) -f $(EXAMPLES)
diff --git a/examples/pcapread.c b/examples/pcapread.c
new file mode 100644
index 0000000..5ac1250
--- /dev/null
+++ b/examples/pcapread.c
@@ -0,0 +1,76 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include <hexagram/pcapng.h>
+
+static void usage(int argc, char **argv, const char *message, ...) {
+    if (message) {
+        va_list args;
+
+        va_start(args, message);
+        vfprintf(stderr, message, args);
+        va_end(args);
+    }
+
+    fprintf(stderr, "usage: %s [file.pcapng]\n", argv[0]);
+
+    exit(1);
+}
+
+static int handle_block(int fd, uint32_t type, size_t len) {
+    printf("Read block type %08"PRIx32" len %zu\n",
+        type, len);
+
+    if (lseek(fd, len, SEEK_CUR) < 0) {
+        perror("lseek()");
+
+        goto error_io;
+    }
+
+    return 0;
+
+error_io:
+    return -1;
+}
+
+int main(int argc, char **argv) {
+    int fd, error;
+
+    if (argc == 1) {
+        fd = fileno(stdin);
+    } else if (argc == 2) {
+        if ((fd = open(argv[1], O_RDONLY)) < 0) {
+            perror("open()");
+
+            goto error_open;
+        }
+    } else {
+        usage(argc, argv, NULL);
+    }
+
+    if (hexagram_pcapng_stream_read(fd, handle_block, &error) < 0) {
+        perror("hexagram_pcapng_stream_read()");
+
+        goto error_io;
+    }
+
+    if (argc == 2) {
+        close(fd);
+    }
+
+    return 0;
+
+error_io:
+    if (argc == 2) {
+        close(fd);
+    }
+
+error_open:
+    return 1;
+}