1 files changed, 188 insertions, 0 deletions

diff --git a/other/b-scan/tmp/modules/mod_httpd.c b/other/b-scan/tmp/modules/mod_httpd.c
new file mode 100644
index 0000000..275125c
--- /dev/null
+++ b/other/b-scan/tmp/modules/mod_httpd.c
@@ -0,0 +1,188 @@
+/*
+ * mod_example.c
+ * Example module for bscan.
+ */
+
+#include <bscan/bscan.h>
+#include <bscan/module.h>
+#include <stdio.h>
+
+
+#ifndef MOD_NAME
+#define MOD_NAME        "mod_httpd"
+#endif
+
+#define HEADREQ         "HEAD / HTTP/1.0\r\n\r\n"
+
+
+static int isinit=0;
+/*
+ * some variables from the binary-process
+ */
+extern int dlt_len;
+extern u_char *align_buf;
+extern unsigned short ip_options;
+extern struct ip *ip;
+extern struct Ether_header *eth;
+extern u_int plen, pcaplen;
+
+struct _mopt
+{
+    unsigned short int dport;   /* dport in NBO */
+    char *request;      /* the http-request */
+} static mopt;
+
+/*
+ * static functions prototypes
+ */
+static int mdo_opt(int, char **, struct _opt *);
+static void init_vars(struct _opt *);
+static int process_rcv(struct _opt *);
+
+/*
+ * print out usage informations
+ */
+void
+musage()
+{
+    printf ("\n"MOD_NAME"\n");
+    printf (" -p <port>, default 80\n");
+    printf (" -r <request>, default 'HEAD / HTTP/1.0'\n");
+}
+
+
+/*
+ * return 0 on success, != 0 on failure
+ */
+int
+init(char **modname, int argc, char *argv[], struct _opt *opt)
+{
+#ifdef DEBUG
+        printf("MODULE INIT\n");
+#endif
+        if (isinit)
+                return(-1);
+
+        *modname = MOD_NAME;
+        isinit = 1;
+        init_vars(opt);
+
+        if (mdo_opt(argc, argv, opt) != 0)
+                return(-1);
+
+        return(0);
+}
+
+/*
+ * fini-routine. called on cleanup 
+ */
+int
+fini()
+{
+#ifdef DEBUG
+        printf("MODULE FINI\n");
+#endif
+        return(0);
+}
+
+
+/*
+ * 
+ */
+int
+callmdl(int entry, struct _opt *opt)
+{
+#ifdef DEBUG
+        printf("MODULE CALLMDL\n");
+#endif
+        if (entry == MOD_FIRSTPKG)
+                return(RMOD_SKIP);
+
+        if (entry == MOD_RCV)
+                process_rcv(opt);
+
+        return(RMOD_OK);
+}
+
+
+/*
+ ***********************************************************
+ *  Our OWN/static functions for THIS module               *
+ ***********************************************************
+ */
+
+/*
+ * initialize all local variables.
+ * We use some 'unused' variables of the masterprogramm
+ */
+static void
+init_vars(struct _opt *opt)
+{
+    mopt.dport = htons(80);
+    mopt.request = HEADREQ;
+}
+
+
+/*
+ * LOCAL/STATIC function, only available in the module
+ * return 0 on success, != 0 on failure
+ */
+static int
+mdo_opt(int argc, char *argv[], struct _opt *opt)
+{
+    extern char *optarg;
+    /*extern int optind, opterr, optopt;*/
+    int c;
+
+    while ((c = getopt (argc, argv, "p:r:")) != -1)
+    {
+        switch (c)
+        {
+        case 'p':
+           mopt.dport = htons(strtoul (optarg, (char **) NULL, 10));
+           break;
+        case 'r':
+           mopt.request = optarg;
+           fprintf(stderr, MOD_NAME ": requesting \"%s\"\n", optarg);
+           break;
+        case ':':
+            fprintf(stderr, "missing parameter\n");
+            return(-1);
+        default:
+            return(-1);
+        }
+    }
+    return(0);
+}
+
+
+/*
+ * process incoming packets 
+ * IP-packet is verified and variables valid (ip_options, *ip)
+ */
+static int
+process_rcv(struct _opt *opt)
+{
+    struct tcphdr *tcp;
+    unsigned short tcp_options = 0;
+    uint iphdr_len = 0;
+
+
+    if (ip->ip_p != IPPROTO_TCP)
+        return(0);
+
+    iphdr_len = sizeof(*ip) + ip_options;
+    tcp = (struct tcphdr *) (align_buf + iphdr_len);
+
+    if (vrfy_tcp(tcp, plen - dlt_len - iphdr_len, &tcp_options) != 0)
+        return(0);
+
+    if (tcp->th_sport != mopt.dport)
+        return(0);
+
+    if ((tcp->th_flags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK))
+        answer_tcp (opt->sox, ip, tcp, TH_ACK | TH_PUSH, mopt.request, strlen(mopt.request));
+
+   return(0);
+}
+