[gopher] Capability files are dangerous

[Kim Holviala]

On May 14, 2012, at 19:27 , Kim Holviala wrote:

> And related to the above; I can determine with 100% reliability all of the existing gopher servers. Got code too to prove it.

Still one more before I go see teh ladies.

/*
 * Figure out gopher server software
 */
char *get_gopherd(char *host, int port)
{
        static char result[128];
        char page[BUFSIZE];
        char *c;

        /* Try fingerprinting hURL reply */
        if (tcp_request(host, port, "URL:http://www.google.com/" CRLF,
                        page, sizeof(page)) == ERROR)           return NA;

        if (strstr(page, "pygopherd"))                          return "PyGopherd";
        if (strstr(page, "bucktooth"))                          return "Bucktooth";
        if (strstr(page, "Gophernicus"))                        return "Gophernicus";
        if (strstr(page, "GopherBlock"))                        return "GopherBlock";
        if (strstr(page, "You'll be redirected"))               return "mgod";
        if (strstr(page, "This page is for redirecting you"))   return "Geomyidae";
        if (strstr(page, "It appears that you clicked on a"))   return "Grumpy";
        if (strstr(page, "refresh\" content=\"0;URL=") &&
            !strstr(page, "</HTML>"))                           return "Gophserv";

        if (sstrncmp(page, "3Server error: Sorry, access denied") == MATCH &&
            strstr(page, "\terror.host"))                       return "GN";

        /* Synchronet? */
        if (page[0] == '.') {
                if (tcp_request(host, port, "ver" CRLF,
                                page, sizeof(page)) == ERROR)   return NA;
                if (strstr(page, "Synchronet"))                 return "Synchronet";
        }

        /* VenVen */
        if (page[0] == '\0') {
                if (tcp_request(host, port, CRLF,
                                page, sizeof(page)) == ERROR)   return NA;
                if (strstr(page, "0./") || strstr(page, "1./")) return "VenVen";
        }

        /* Do one more detection test */
        if (tcp_request(host, port, "lkjsdflkjsadlflksjdflkjasdfklj" CRLF,
                        page, sizeof(page)) == ERROR)           return NA;

        if (strstr(page, "no handler found"))                   return "PyGopherd";
        if (strstr(page, "[pselect]"))                          return "GN";
        if (strstr(page, "<html") || strstr(page, "<HTML"))     return "g2httpd";

        /* Try /server-status */
        if (tcp_request(host, port, "/server-status" CRLF,
                        page, sizeof(page)) == ERROR)           return NA;

        if ((c = strstr(page, "Server: "))) {
                sstrlcpy(result, c + 8);
                if ((c = strchr(result, '/'))) *c = '\0';
                if ((c = strchr(result, '('))) *c = '\0';
                return result;
        }

        /* Damn */
        return "Unknown";
}