Add a non-ip network string xmit concept

misc/clortho.c

@@ -0,0 +1,85 @@
+/* Copyright 2019 Lenovo */
+#include <arpa/inet.h>
+#include <crypt.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define OUI_ETHERTYPE 0x88b7
+#define MAXPACKET 1024
+#define CHDR "\xa4\x8c\xdb\x30\x01"
+
+int get_interface_index(int sock, char *interface) {
+        struct ifreq req;
+        memset(&req, 0, sizeof(req));
+        strncpy(req.ifr_name, interface, IFNAMSIZ);
+        if (ioctl(sock, SIOCGIFINDEX, &req) < 0) {
+                return -1;
+        }
+        return req.ifr_ifindex;
+}
+
+unsigned char* genpasswd() {
+        unsigned char * passwd;
+        int urandom;
+        passwd = calloc(33, sizeof(char));
+        urandom = open("/dev/urandom", O_RDONLY);
+        read(urandom, passwd, 32);
+        close(urandom);
+        for (urandom = 0; urandom < 32; urandom++) {
+                passwd[urandom] = 0x30 + (passwd[urandom] >> 2);
+        }
+        return passwd;
+
+}
+
+int parse_macaddr(char* macaddr) {
+        unsigned char *curr;
+        unsigned char idx;
+        curr = strtok(macaddr, ":-");
+        idx = 0;
+
+        while (curr != NULL) {
+                macaddr[idx++] = strtoul(curr, NULL, 16);
+                curr = strtok(NULL, ":-");
+        }
+
+}
+
+int main(int argc, char* argv[]) {
+        int sock;
+        int iface;
+        unsigned char* passwd;
+        unsigned char* macaddr;
+
+        unsigned char buffer[MAXPACKET];
+
+        passwd = genpasswd();
+        if (argc < 3) { 
+            fprintf(stderr, "Missing interface name and target MAC\n");
+            exit(1);
+        }
+        printf("%s\n", argv[2]);
+        parse_macaddr(argv[2]);
+        printf("%s\n", argv[2]);
+        sock = socket(AF_PACKET, SOCK_DGRAM, htons(OUI_ETHERTYPE));
+        if (sock < 0) {
+                fprintf(stderr, "Unable to open socket (run as root?)\n");
+                exit(1);
+        }
+        iface = get_interface_index(sock, argv[1]);
+        if (iface < 0) {
+                fprintf(stderr, "Unable to find specified interface '%s'\n", argv[1]);
+                exit(1);
+        }
+
+
+}
+