1 files changed, 178 insertions, 0 deletions

diff --git a/other/guess-who/misc.cc b/other/guess-who/misc.cc
new file mode 100644
index 0000000..b61417c
--- /dev/null
+++ b/other/guess-who/misc.cc
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 2002 Sebastian Krahmer.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Sebastian Krahmer.
+ * 4. The name Sebastian Krahmer may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <sys/time.h>
+
+
+void die(const char *s)
+{
+        perror(s);
+        exit(errno);
+}
+
+
+int writen(int fd, const void *buf, size_t len)
+{
+        int o = 0, n;
+        char *ptr = (char*)buf;
+
+        while (len > 0) {
+                if ((n = write(fd, ptr+o, len)) < 0)
+                        return n;
+                len -= n;
+                o += n;
+        }
+        return o;
+}
+
+
+/* Simple tcp_connect(). Disables Nagle.
+ */
+int tcp_connect(const char *host, u_short port = 22)
+{
+        int sock, one = 1, len = sizeof(one), r;
+        char service[20];
+        struct addrinfo *res, hints = {0, PF_INET, SOCK_STREAM, 0};
+
+        if ((sock = socket(PF_INET, SOCK_STREAM, 0)) < 0)
+                die("sock");
+
+        sprintf(service, "%d", port);
+        if ((r = getaddrinfo(host, service, &hints, &res)) != 0) {
+                fprintf(stderr, "tcp_connect::getaddrinfo: %s\n", gai_strerror(r));
+                exit(EXIT_FAILURE);
+        }
+#ifdef DONT_BLOCK
+        int f = fcntl(sock, F_GETFL);
+        f |= O_NONBLOCK;
+        if (fcntl(sock, F_SETFL, f) < 0)
+                die("fcntl");
+#endif
+        if (connect(sock, res->ai_addr, res->ai_addrlen) < 0 &&
+            errno != EINPROGRESS)
+                return -1;
+#ifdef DONT_BLOCK
+        struct timeval tv;
+        tv.tv_sec = 2;
+        tv.tv_usec = 0;
+        fd_set rset;
+        FD_ZERO(&rset); FD_SET(sock, &rset);
+        if (select(sock+1, &rset, &rset, NULL, &tv) <= 0) {
+                close(sock);
+                return -1;
+        }
+
+        // fetch pending error
+        int pe = 0; size_t pe_len = sizeof(pe);
+        if (getsockopt(sock, SOL_SOCKET, SO_ERROR, &pe, &pe_len) < 0)
+                die("getsockopt");
+        if (pe != 0) {
+                errno = pe;
+                close(sock);
+                return -1;
+        }
+                
+        if (fcntl(sock, F_SETFL, f&~O_NONBLOCK) < 0)
+                die("fcntl");
+#endif
+        if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &one, len) < 0)
+                die("setsockopt");
+
+        freeaddrinfo(res);
+        return sock;
+}
+
+void buffer_dump(const char *desc, unsigned char *buffer, size_t blen)
+{
+        unsigned int i;
+
+        printf("%s=\n", desc);
+        for (i = 0; i < blen; i++) {
+                printf("%02x", buffer[i]);
+                if (i%16==15)
+                        printf("\r\n");
+                else if (i%2==1)
+                        printf(" ");
+        }
+        printf("\r\n");
+}
+
+
+/* accept "1.2.3.4" or "1.2.3.4-5.6.7.8".
+ * use old := 0 to get first address, and pass
+ * return value in subsequent calls as 'old'.
+ * returns 0 when no more adresses.
+ */
+int next_ip(char *addr, unsigned long old)
+{
+        char *ptr;
+        unsigned long ip, eip, sip;
+
+        assert(addr);
+
+        if (old == 0xffffffff)
+                return -1;
+
+        if ((ptr = strchr(addr, '-')) != NULL) {
+                *ptr++ = 0;
+                eip = inet_addr(ptr);
+                sip = inet_addr(addr);
+                ptr[-1] = '-';
+        } else {
+                eip = inet_addr(addr);
+                if (eip == old)
+                        return -1;
+                return eip;
+        }
+
+        if (old == 0)
+                return sip;
+        if (ntohl(old)+1 > ntohl(eip))
+                return -1;
+        
+        ip = htonl(ntohl(old)+1);
+        return ip;
+}
+
+