+ int code, id, len;
+ int clen, nlen;
+ u_char x;
+
+ if (plen < CHAP_HEADERLEN)
+ return 0;
+ GETCHAR(code, p);
+ GETCHAR(id, p);
+ GETSHORT(len, p);
+ if (len < CHAP_HEADERLEN || len > plen)
+ return 0;
+
+ if (code >= 1 && code <= sizeof(ChapCodenames) / sizeof(char *))
+ printer(arg, " %s", ChapCodenames[code-1]);
+ else
+ printer(arg, " code=0x%x", code);
+ printer(arg, " id=0x%x", id);
+ len -= CHAP_HEADERLEN;
+ switch (code) {
+ case CHAP_CHALLENGE:
+ case CHAP_RESPONSE:
+ if (len < 1)
+ break;
+ clen = p[0];
+ if (len < clen + 1)
+ break;
+ ++p;
+ nlen = len - clen - 1;
+ printer(arg, " <");
+ for (; clen > 0; --clen) {
+ GETCHAR(x, p);
+ printer(arg, "%.2x", x);
+ }
+ printer(arg, ">, name = ");
+ print_string((char *)p, nlen, printer, arg);
+ break;
+ case CHAP_FAILURE:
+ case CHAP_SUCCESS:
+ printer(arg, " ");
+ print_string((char *)p, len, printer, arg);
+ break;
+ default:
+ for (clen = len; clen > 0; --clen) {
+ GETCHAR(x, p);
+ printer(arg, " %.2x", x);
+ }
+ }