create new project.v1.0.0

除sapp和插件之外, 其他模块也经常有从某个层跳转到某个层的需求,
从sapp中剥离此部分代码, 独立成为一个公共库.

2 files changed, 155 insertions, 0 deletions

diff --git a/test/Makefile b/test/Makefile
new file mode 100644
index 0000000..af0990a
--- /dev/null
+++ b/test/Makefile
@@ -0,0 +1,2 @@
+test_jump_layer:test_jump_layer.c
+	gcc -g -o $@ test_jump_layer.c -D_GNU_SOURCE -L/opt/MESA/lib -lMESA_jump_layer -I ../inc -I/opt/MESA/include/MESA -l pcap
diff --git a/test/test_jump_layer.c b/test/test_jump_layer.c
new file mode 100644
index 0000000..0cd518d
--- /dev/null
+++ b/test/test_jump_layer.c
@@ -0,0 +1,153 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <getopt.h>
+#include <pcap/pcap.h>
+#include "MESA_jump_layer.h"
+
+static pcap_t *g_pcap_handle;
+static char *g_input_pcap_name;
+static char *g_input_bpf_string;
+static struct bpf_program g_bpf_filter;
+
+static void usage(const char *prog)
+{
+	printf("Usage:\n");
+	printf("\t-r set input pcap file.\n");
+	printf("\t-f set pcap BPF fileter.\n");
+	exit(0);
+}
+
+static int pcap_set_bpf(pcap_t *handle, const char *filter_str)
+{
+	struct bpf_program bpf_filter;
+
+	if((NULL == handle) || (NULL == filter_str) || ('\0' == *filter_str)){
+		return 0;
+	}
+	
+	if(pcap_compile(handle, &bpf_filter, (char *)filter_str, 1, 0) < 0)
+	{
+		printf("Compile pcap filter '%s' error:%s\n", filter_str, pcap_geterr(handle));
+		return -1;
+	}
+
+	if(pcap_setfilter(handle, &bpf_filter) < 0){
+		printf("Set pcap filter '%s' error:%s\n", filter_str, pcap_geterr(handle));
+		return -1;
+	}
+
+	return 0;
+}
+
+static int pcap_init(void)
+{
+	char err_string[PCAP_ERRBUF_SIZE];
+	
+	g_pcap_handle = pcap_open_offline(g_input_pcap_name, err_string);
+	if(NULL == g_pcap_handle){
+		printf("open file:%s error, %s\n", g_input_pcap_name, err_string);
+		return -1;
+	}
+	
+	if(pcap_compile_nopcap(65535, DLT_RAW, &g_bpf_filter, g_input_bpf_string, 1, 0) < 0){				 
+		printf("Compile pcap filter '%s' error\n", g_input_bpf_string);				  
+		return -1; 
+	}
+
+	return 0;
+}
+
+static void _pcap_pkt_handle(u_char *user, const struct pcap_pkthdr *hdr, const u_char *data)
+{
+	const void *ip4_hdr, *ip6_h;
+	char print_buf[128];
+	int offset_to_eth;
+	static int pkt_index = 0;
+	
+	ip4_hdr = MESA_net_jump_to_layer_greedy(data, ADDR_TYPE_MAC, ADDR_TYPE_IPV4);
+	ip6_h = MESA_net_jump_to_layer_greedy(data, ADDR_TYPE_MAC, ADDR_TYPE_IPV6);
+
+	printf("-----------------------------packet index:%d------------------------------------------\n", pkt_index++);
+	if(ip4_hdr){
+		offset_to_eth = (u_char *)ip4_hdr-data;
+		if(g_input_bpf_string 
+		 && (0 == bpf_filter(g_bpf_filter.bf_insns, (const unsigned char *)ip4_hdr, hdr->caplen-offset_to_eth, hdr->caplen-offset_to_eth))){
+			goto done;
+		}
+		printf("Innermost layer ipv4 offset:%d, addr: %s\n", offset_to_eth, MESA_jump_layer_ipv4_ntop((struct ip *)ip4_hdr, print_buf, sizeof(print_buf)));
+	}
+
+	if(ip6_h){
+		offset_to_eth = (u_char *)ip6_h-data;
+		if(g_input_bpf_string 
+		 && (0 == bpf_filter(g_bpf_filter.bf_insns, (const unsigned char *)ip6_h, hdr->caplen-offset_to_eth, hdr->caplen-offset_to_eth))){
+			goto done;
+		}
+
+		printf("Innermost layer ipv6 offset:%d, addr: %s\n", offset_to_eth, MESA_jump_layer_ipv6_ntop((struct ip6_hdr *)ip6_h, print_buf, sizeof(print_buf)));
+	}
+
+done:
+
+	printf("--------------------------------------------------------------------------------------\n\n");
+}
+
+static void pcap_run(void)
+{
+	
+	pcap_loop(g_pcap_handle, -1, _pcap_pkt_handle, NULL);
+}
+
+int main(int argc, char *argv[])
+{
+	int ret, c, opt_index;
+	
+	while(1){
+	c = getopt_long(argc, argv, "hr:f:", NULL, &opt_index);
+		if(c == -1){
+			ret = 0;
+			break;	
+		}
+
+		switch(c){
+			case 'h':
+				usage(argv[0]);
+			break;
+			
+			case 'r':
+				g_input_pcap_name = strdup(optarg);
+			break;
+			
+			case 'f':
+				g_input_bpf_string = strdup(optarg);
+			break;
+			
+			default:
+				return -1;
+		}	
+	}	
+	
+	if(NULL == g_input_pcap_name){
+		printf("error! must set pcap file name use -r\n");
+		return -1;
+	}
+
+	if(NULL == g_input_bpf_string){
+		printf("you can set BPF filter use -f\n");
+	}
+	
+	if(pcap_init() < 0){
+		return -1;
+	}
+	
+	pcap_run();
+	
+	return 0;
+}
+
+
+#ifdef __cplusplus
+}
+#endif