Add working webpage for unix v4

1 files changed, 403 insertions, 0 deletions

diff --git a/jslinux-2019-12-21/tinyemu-2019-12-21/slirp/misc.c b/jslinux-2019-12-21/tinyemu-2019-12-21/slirp/misc.c
new file mode 100644
index 0000000..7a79cdb
--- /dev/null
+++ b/jslinux-2019-12-21/tinyemu-2019-12-21/slirp/misc.c
@@ -0,0 +1,403 @@
+/*
+ * Copyright (c) 1995 Danny Gasparovski.
+ *
+ * Please read the file COPYRIGHT for the
+ * terms and conditions of the copyright.
+ */
+
+#include "slirp.h"
+
+#ifdef DEBUG
+int slirp_debug = DBG_CALL|DBG_MISC|DBG_ERROR;
+#endif
+
+struct quehead {
+	struct quehead *qh_link;
+	struct quehead *qh_rlink;
+};
+
+inline void
+insque(void *a, void *b)
+{
+	register struct quehead *element = (struct quehead *) a;
+	register struct quehead *head = (struct quehead *) b;
+	element->qh_link = head->qh_link;
+	head->qh_link = (struct quehead *)element;
+	element->qh_rlink = (struct quehead *)head;
+	((struct quehead *)(element->qh_link))->qh_rlink
+	= (struct quehead *)element;
+}
+
+inline void
+remque(void *a)
+{
+  register struct quehead *element = (struct quehead *) a;
+  ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
+  ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
+  element->qh_rlink = NULL;
+}
+
+int add_exec(struct ex_list **ex_ptr, int do_pty, char *exec,
+             struct in_addr addr, int port)
+{
+	struct ex_list *tmp_ptr;
+
+	/* First, check if the port is "bound" */
+	for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
+		if (port == tmp_ptr->ex_fport &&
+		    addr.s_addr == tmp_ptr->ex_addr.s_addr)
+			return -1;
+	}
+
+	tmp_ptr = *ex_ptr;
+	*ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
+	(*ex_ptr)->ex_fport = port;
+	(*ex_ptr)->ex_addr = addr;
+	(*ex_ptr)->ex_pty = do_pty;
+	(*ex_ptr)->ex_exec = (do_pty == 3) ? exec : strdup(exec);
+	(*ex_ptr)->ex_next = tmp_ptr;
+	return 0;
+}
+
+#ifndef HAVE_STRERROR
+
+/*
+ * For systems with no strerror
+ */
+
+extern int sys_nerr;
+extern char *sys_errlist[];
+
+char *
+strerror(error)
+	int error;
+{
+	if (error < sys_nerr)
+	   return sys_errlist[error];
+	else
+	   return "Unknown error.";
+}
+
+#endif
+
+int os_socket(int domain, int type, int protocol)
+{
+    return socket(domain, type, protocol);
+}
+
+uint32_t os_get_time_ms(void)
+{
+    struct timespec ts;
+
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    return ts.tv_sec * 1000 +
+        (ts.tv_nsec / 1000000);
+}
+
+
+#if 1
+
+int
+fork_exec(struct socket *so, const char *ex, int do_pty)
+{
+    /* not implemented */
+    return 0;
+}
+
+#else
+
+/*
+ * XXX This is ugly
+ * We create and bind a socket, then fork off to another
+ * process, which connects to this socket, after which we
+ * exec the wanted program.  If something (strange) happens,
+ * the accept() call could block us forever.
+ *
+ * do_pty = 0   Fork/exec inetd style
+ * do_pty = 1   Fork/exec using slirp.telnetd
+ * do_ptr = 2   Fork/exec using pty
+ */
+int
+fork_exec(struct socket *so, const char *ex, int do_pty)
+{
+	int s;
+	struct sockaddr_in addr;
+	socklen_t addrlen = sizeof(addr);
+	int opt;
+        int master = -1;
+	const char *argv[256];
+	/* don't want to clobber the original */
+	char *bptr;
+	const char *curarg;
+	int c, i, ret;
+
+	DEBUG_CALL("fork_exec");
+	DEBUG_ARG("so = %lx", (long)so);
+	DEBUG_ARG("ex = %lx", (long)ex);
+	DEBUG_ARG("do_pty = %lx", (long)do_pty);
+
+	if (do_pty == 2) {
+                return 0;
+	} else {
+		addr.sin_family = AF_INET;
+		addr.sin_port = 0;
+		addr.sin_addr.s_addr = INADDR_ANY;
+
+		if ((s = os_socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
+		    bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
+		    listen(s, 1) < 0) {
+			lprint("Error: inet socket: %s\n", strerror(errno));
+			closesocket(s);
+
+			return 0;
+		}
+	}
+
+	switch(fork()) {
+	 case -1:
+		lprint("Error: fork failed: %s\n", strerror(errno));
+		close(s);
+		if (do_pty == 2)
+		   close(master);
+		return 0;
+
+	 case 0:
+		/* Set the DISPLAY */
+		if (do_pty == 2) {
+			(void) close(master);
+#ifdef TIOCSCTTY /* XXXXX */
+			(void) setsid();
+			ioctl(s, TIOCSCTTY, (char *)NULL);
+#endif
+		} else {
+			getsockname(s, (struct sockaddr *)&addr, &addrlen);
+			close(s);
+			/*
+			 * Connect to the socket
+			 * XXX If any of these fail, we're in trouble!
+	 		 */
+			s = os_socket(AF_INET, SOCK_STREAM, 0);
+			addr.sin_addr = loopback_addr;
+                        do {
+                            ret = connect(s, (struct sockaddr *)&addr, addrlen);
+                        } while (ret < 0 && errno == EINTR);
+		}
+
+		dup2(s, 0);
+		dup2(s, 1);
+		dup2(s, 2);
+		for (s = getdtablesize() - 1; s >= 3; s--)
+		   close(s);
+
+		i = 0;
+		bptr = qemu_strdup(ex); /* No need to free() this */
+		if (do_pty == 1) {
+			/* Setup "slirp.telnetd -x" */
+			argv[i++] = "slirp.telnetd";
+			argv[i++] = "-x";
+			argv[i++] = bptr;
+		} else
+		   do {
+			/* Change the string into argv[] */
+			curarg = bptr;
+			while (*bptr != ' ' && *bptr != (char)0)
+			   bptr++;
+			c = *bptr;
+			*bptr++ = (char)0;
+			argv[i++] = strdup(curarg);
+		   } while (c);
+
+                argv[i] = NULL;
+		execvp(argv[0], (char **)argv);
+
+		/* Ooops, failed, let's tell the user why */
+        fprintf(stderr, "Error: execvp of %s failed: %s\n",
+                argv[0], strerror(errno));
+		close(0); close(1); close(2); /* XXX */
+		exit(1);
+
+	 default:
+		if (do_pty == 2) {
+			close(s);
+			so->s = master;
+		} else {
+			/*
+			 * XXX this could block us...
+			 * XXX Should set a timer here, and if accept() doesn't
+		 	 * return after X seconds, declare it a failure
+		 	 * The only reason this will block forever is if socket()
+		 	 * of connect() fail in the child process
+		 	 */
+                        do {
+                            so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
+                        } while (so->s < 0 && errno == EINTR);
+                        closesocket(s);
+			opt = 1;
+			setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
+			opt = 1;
+			setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
+		}
+		fd_nonblock(so->s);
+
+		/* Append the telnet options now */
+                if (so->so_m != NULL && do_pty == 1)  {
+			sbappend(so, so->so_m);
+                        so->so_m = NULL;
+		}
+
+		return 1;
+	}
+}
+#endif
+
+#ifndef HAVE_STRDUP
+char *
+strdup(str)
+	const char *str;
+{
+	char *bptr;
+
+	bptr = (char *)malloc(strlen(str)+1);
+	strcpy(bptr, str);
+
+	return bptr;
+}
+#endif
+
+void lprint(const char *format, ...)
+{
+    va_list args;
+
+    va_start(args, format);
+    vprintf(format, args);
+    va_end(args);
+}
+
+/*
+ * Set fd blocking and non-blocking
+ */
+
+void
+fd_nonblock(int fd)
+{
+#ifdef FIONBIO
+#ifdef _WIN32
+        unsigned long opt = 1;
+#else
+        int opt = 1;
+#endif
+
+	ioctlsocket(fd, FIONBIO, &opt);
+#else
+	int opt;
+
+	opt = fcntl(fd, F_GETFL, 0);
+	opt |= O_NONBLOCK;
+	fcntl(fd, F_SETFL, opt);
+#endif
+}
+
+void
+fd_block(int fd)
+{
+#ifdef FIONBIO
+#ifdef _WIN32
+        unsigned long opt = 0;
+#else
+	int opt = 0;
+#endif
+
+	ioctlsocket(fd, FIONBIO, &opt);
+#else
+	int opt;
+
+	opt = fcntl(fd, F_GETFL, 0);
+	opt &= ~O_NONBLOCK;
+	fcntl(fd, F_SETFL, opt);
+#endif
+}
+
+#if 0
+void slirp_connection_info(Slirp *slirp, Monitor *mon)
+{
+    const char * const tcpstates[] = {
+        [TCPS_CLOSED]       = "CLOSED",
+        [TCPS_LISTEN]       = "LISTEN",
+        [TCPS_SYN_SENT]     = "SYN_SENT",
+        [TCPS_SYN_RECEIVED] = "SYN_RCVD",
+        [TCPS_ESTABLISHED]  = "ESTABLISHED",
+        [TCPS_CLOSE_WAIT]   = "CLOSE_WAIT",
+        [TCPS_FIN_WAIT_1]   = "FIN_WAIT_1",
+        [TCPS_CLOSING]      = "CLOSING",
+        [TCPS_LAST_ACK]     = "LAST_ACK",
+        [TCPS_FIN_WAIT_2]   = "FIN_WAIT_2",
+        [TCPS_TIME_WAIT]    = "TIME_WAIT",
+    };
+    struct in_addr dst_addr;
+    struct sockaddr_in src;
+    socklen_t src_len;
+    uint16_t dst_port;
+    struct socket *so;
+    const char *state;
+    char buf[20];
+    int n;
+
+    monitor_printf(mon, "  Protocol[State]    FD  Source Address  Port   "
+                        "Dest. Address  Port RecvQ SendQ\n");
+
+    for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
+        if (so->so_state & SS_HOSTFWD) {
+            state = "HOST_FORWARD";
+        } else if (so->so_tcpcb) {
+            state = tcpstates[so->so_tcpcb->t_state];
+        } else {
+            state = "NONE";
+        }
+        if (so->so_state & (SS_HOSTFWD | SS_INCOMING)) {
+            src_len = sizeof(src);
+            getsockname(so->s, (struct sockaddr *)&src, &src_len);
+            dst_addr = so->so_laddr;
+            dst_port = so->so_lport;
+        } else {
+            src.sin_addr = so->so_laddr;
+            src.sin_port = so->so_lport;
+            dst_addr = so->so_faddr;
+            dst_port = so->so_fport;
+        }
+        n = snprintf(buf, sizeof(buf), "  TCP[%s]", state);
+        memset(&buf[n], ' ', 19 - n);
+        buf[19] = 0;
+        monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
+                       src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
+                       ntohs(src.sin_port));
+        monitor_printf(mon, "%15s %5d %5d %5d\n",
+                       inet_ntoa(dst_addr), ntohs(dst_port),
+                       so->so_rcv.sb_cc, so->so_snd.sb_cc);
+    }
+
+    for (so = slirp->udb.so_next; so != &slirp->udb; so = so->so_next) {
+        if (so->so_state & SS_HOSTFWD) {
+            n = snprintf(buf, sizeof(buf), "  UDP[HOST_FORWARD]");
+            src_len = sizeof(src);
+            getsockname(so->s, (struct sockaddr *)&src, &src_len);
+            dst_addr = so->so_laddr;
+            dst_port = so->so_lport;
+        } else {
+            n = snprintf(buf, sizeof(buf), "  UDP[%d sec]",
+                         (so->so_expire - curtime) / 1000);
+            src.sin_addr = so->so_laddr;
+            src.sin_port = so->so_lport;
+            dst_addr = so->so_faddr;
+            dst_port = so->so_fport;
+        }
+        memset(&buf[n], ' ', 19 - n);
+        buf[19] = 0;
+        monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
+                       src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
+                       ntohs(src.sin_port));
+        monitor_printf(mon, "%15s %5d %5d %5d\n",
+                       inet_ntoa(dst_addr), ntohs(dst_port),
+                       so->so_rcv.sb_cc, so->so_snd.sb_cc);
+    }
+}
+#endif