1 files changed, 381 insertions, 0 deletions
diff --git a/jni/iodine/src/common.c b/jni/iodine/src/common.c
new file mode 100644
index 0000000..7a57a8a
--- /dev/null
+++ b/jni/iodine/src/common.c
@@ -0,0 +1,381 @@
+/* Copyright (c) 2006-2009 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
+ * Copyright (c) 2007 Albert Lee <trisk@acm.jhu.edu>.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <time.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#ifdef WINDOWS32
+#include <winsock2.h>
+#include <conio.h>
+#else
+#include <arpa/nameser.h>
+#ifdef DARWIN
+#define BIND_8_COMPAT
+#include <arpa/nameser_compat.h>
+#endif
+#include <termios.h>
+#include <err.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <syslog.h>
+#endif
+
+#ifdef HAVE_SETCON
+# include <selinux/selinux.h>
+#endif
+
+#include "common.h"
+
+/* The raw header used when not using DNS protocol */
+const unsigned char raw_header[RAW_HDR_LEN] = { 0x10, 0xd1, 0x9e, 0x00 };
+
+/* daemon(3) exists only in 4.4BSD or later, and in GNU libc */
+#if !defined(WINDOWS32) && !(defined(BSD) && (BSD >= 199306)) && !defined(__GLIBC__) && !defined(__ANDROID__)
+static int daemon(int nochdir, int noclose)
+{
+ 	int fd, i;
+ 
+ 	switch (fork()) {
+ 		case 0:
+ 			break;
+ 		case -1:
+ 			return -1;
+ 		default:
+ 			_exit(0);
+ 	}
+ 
+ 	if (!nochdir) {
+ 		chdir("/");
+ 	}
+ 
+ 	if (setsid() < 0) {
+ 		return -1;
+ 	}
+ 	
+ 	if (!noclose) {
+ 		if ((fd = open("/dev/null", O_RDWR)) >= 0) {
+ 			for (i = 0; i < 3; i++) {
+ 				dup2(fd, i);
+ 			}
+ 			if (fd > 2) {
+ 				close(fd);
+ 			}
+ 		}
+ 	}
+	return 0;
+}
+#endif
+
+#if defined(__BEOS__) && !defined(__HAIKU__)
+int setgroups(int count, int *groups)
+{
+	/* errno = ENOSYS; */
+	return -1;
+}
+#endif
+
+
+void
+check_superuser(void (*usage_fn)(void))
+{
+#ifndef WINDOWS32
+	if (geteuid() != 0) {
+		warnx("Run as root and you'll be happy.\n");
+		usage_fn();
+		/* NOTREACHED */
+	}
+#endif
+}
+
+int 
+open_dns(int localport, in_addr_t listen_ip) 
+{
+	struct sockaddr_in addr;
+	int flag = 1;
+	int fd;
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(localport);
+	/* listen_ip already in network byte order from inet_addr, or 0 */
+	addr.sin_addr.s_addr = listen_ip; 
+
+	if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+		fprintf(stderr, "got fd %d\n", fd);
+		err(1, "socket");
+	}
+
+	flag = 1;
+#ifdef SO_REUSEPORT
+	setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (const void*) &flag, sizeof(flag));
+#endif
+	setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const void*) &flag, sizeof(flag));
+
+#ifndef WINDOWS32
+	/* To get destination address from each UDP datagram, see iodined.c:read_dns() */
+	setsockopt(fd, IPPROTO_IP, DSTADDR_SOCKOPT, (const void*) &flag, sizeof(flag));
+#endif
+
+#ifdef IP_OPT_DONT_FRAG
+	/* Set dont-fragment ip header flag */
+	flag = DONT_FRAG_VALUE;
+	setsockopt(fd, IPPROTO_IP, IP_OPT_DONT_FRAG, (const void*) &flag, sizeof(flag));
+#endif
+
+	if(bind(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) 
+		err(1, "bind");
+
+	fprintf(stderr, "Opened UDP socket\n");
+
+	return fd;
+}
+
+void
+close_dns(int fd)
+{
+	close(fd);
+}
+
+void
+do_chroot(char *newroot)
+{
+#if !(defined(WINDOWS32) || defined(__BEOS__) || defined(__HAIKU__))
+	if (chroot(newroot) != 0 || chdir("/") != 0)
+		err(1, "%s", newroot);
+
+	seteuid(geteuid());
+	setuid(getuid());
+#else
+	warnx("chroot not available");
+#endif
+}
+
+void
+do_setcon(char *context)
+{
+#ifdef HAVE_SETCON
+	if (-1 == setcon(context))
+		err(1, "%s", context);
+#else
+	warnx("No SELinux support built in");
+#endif
+}
+
+void
+do_pidfile(char *pidfile)
+{
+#ifndef WINDOWS32
+	FILE *file;
+
+	if ((file = fopen(pidfile, "w")) == NULL) {
+		syslog(LOG_ERR, "Cannot write pidfile to %s, exiting", pidfile);
+		err(1, "do_pidfile: Can not write pidfile to %s", pidfile);
+	} else {
+		fprintf(file, "%d\n", (int)getpid());
+		fclose(file);
+	}
+#else
+	fprintf(stderr, "Windows version does not support pid file\n");
+#endif
+}
+
+void
+do_detach()
+{
+#ifndef WINDOWS32
+	fprintf(stderr, "Detaching from terminal...\n");
+	daemon(0, 0);
+	umask(0);
+	alarm(0);
+#else
+	fprintf(stderr, "Windows version does not support detaching\n");
+#endif
+}
+
+void
+read_password(char *buf, size_t len)
+{
+	char pwd[80];
+#ifndef WINDOWS32
+	struct termios old;
+	struct termios tp;
+
+	tcgetattr(0, &tp);
+	old = tp;
+	
+	tp.c_lflag &= (~ECHO);
+	tcsetattr(0, TCSANOW, &tp);
+#else
+	int i;
+#endif
+
+	fprintf(stderr, "Enter password: ");
+	fflush(stderr);
+#ifndef WINDOWS32
+	scanf("%79s", pwd);
+#else
+	for (i = 0; i < sizeof(pwd); i++) {
+		pwd[i] = getch();
+		if (pwd[i] == '\r' || pwd[i] == '\n') {
+			pwd[i] = 0;
+			break;
+		} else if (pwd[i] == '\b') {
+			i--; 			/* Remove the \b char */
+			if (i >=0) i--; 	/* If not first char, remove one more */
+		}
+	}
+#endif
+	fprintf(stderr, "\n");
+
+#ifndef WINDOWS32
+	tcsetattr(0, TCSANOW, &old);	
+#endif
+
+	strncpy(buf, pwd, len);
+	buf[len-1] = '\0';
+}
+
+int
+check_topdomain(char *str)
+{
+       int i;
+
+       if(str[0] == '.') /* special case */
+               return 1;
+
+       for( i = 0; i < strlen(str); i++) {
+               if( isalpha(str[i]) || isdigit(str[i]) || str[i] == '-' || str[i] == '.' )
+                       continue;
+               else 
+		       return 1;
+       }
+       return 0;
+}
+
+#if defined(WINDOWS32)
+int
+inet_aton(const char *cp, struct in_addr *inp)
+{
+ inp->s_addr = inet_addr(cp);
+ return inp->s_addr != INADDR_ANY;
+}
+
+void
+warn(const char *fmt, ...)
+{
+	va_list list;
+
+	va_start(list, fmt);
+	if (fmt) fprintf(stderr, fmt, list);
+	if (errno == 0) {
+		fprintf(stderr, ": WSA error %d\n", WSAGetLastError()); 
+	} else {
+		fprintf(stderr, ": %s\n", strerror(errno));
+	}
+	va_end(list);
+}
+#endif
+
+#ifdef __ANDROID__
+
+void android_printf(const char *fmt, ...)
+{
+    static char buf[1024];
+	va_list list;
+	va_start(list, fmt);
+
+	snprintf(buf,1024,fmt,list);
+
+    android_log_callback(buf);
+
+	va_end(list);
+}
+
+
+void
+warn(const char *fmt, ...)
+{
+	va_list list;
+
+	va_start(list, fmt);
+	if (fmt) fprintf(stderr, fmt, list);
+	if (errno != 0)
+		fprintf(stderr, ": %s\n", strerror(errno));
+	va_end(list);
+}
+#endif
+
+#if defined(WINDOWS32) || defined(__ANDROID__)
+void
+warnx(const char *fmt, ...)
+{
+	va_list list;
+
+	va_start(list, fmt);
+	if (fmt) fprintf(stderr, fmt, list);
+	fprintf(stderr, "\n");
+	va_end(list);
+}
+
+void
+err(int eval, const char *fmt, ...)
+{
+	va_list list;
+
+	va_start(list, fmt);
+	warn(fmt, list);
+	va_end(list);
+	exit(eval);
+}
+
+void
+errx(int eval, const char *fmt, ...)
+{
+	va_list list;
+
+	va_start(list, fmt);
+	warnx(fmt, list);
+	va_end(list);
+	exit(eval);
+}
+#endif
+
+
+int recent_seqno(int ourseqno, int gotseqno)
+/* Return 1 if we've seen gotseqno recently (current or up to 3 back).
+   Return 0 if gotseqno is new (or very old).
+*/
+{
+	int i;
+	for (i = 0; i < 4; i++, ourseqno--) {
+		if (ourseqno < 0)
+			ourseqno = 7;
+		if (gotseqno == ourseqno)
+			return 1;
+	}
+	return 0;
+}