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authorKatolaZ <katolaz@freaknet.org>2019-02-08 05:13:11 +0000
committerKatolaZ <katolaz@freaknet.org>2019-02-08 05:13:11 +0000
commit172540a4a29fa4c0c5f0431bb5bf5b3d08ec92c0 (patch)
treeac15b0b8ae60a42ffe04b3fd37cf2fbc97b2ddd6 /finger/net.c
New upstream version 0.17upstream
Diffstat (limited to 'finger/net.c')
-rw-r--r--finger/net.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/finger/net.c b/finger/net.c
new file mode 100644
index 0000000..d6169fa
--- /dev/null
+++ b/finger/net.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
+ *
+ * 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 the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+#ifndef lint
+/*static char sccsid[] = "from: @(#)net.c 5.5 (Berkeley) 6/1/90";*/
+char net_rcsid[] = "$Id: net.c,v 1.9 1999/09/14 10:51:11 dholland Exp $";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+#include "finger.h"
+
+void netfinger(const char *name) {
+ register FILE *fp;
+ struct in_addr defaddr;
+ register int c, sawret, ateol;
+ struct hostent *hp, def;
+ struct servent *sp;
+ struct sockaddr_in sn;
+ int s;
+ char *alist[1], *host;
+
+ host = strrchr(name, '@');
+ if (!host) return;
+ *host++ = '\0';
+
+ memset(&sn, 0, sizeof(sn));
+
+ sp = getservbyname("finger", "tcp");
+ if (!sp) {
+ eprintf("finger: tcp/finger: unknown service\n");
+ return;
+ }
+ sn.sin_port = sp->s_port;
+
+ hp = gethostbyname(host);
+ if (!hp) {
+ if (!inet_aton(host, &defaddr)) {
+ eprintf("finger: unknown host: %s\n", host);
+ return;
+ }
+ def.h_name = host;
+ def.h_addr_list = alist;
+ def.h_addr = (char *)&defaddr;
+ def.h_length = sizeof(struct in_addr);
+ def.h_addrtype = AF_INET;
+ def.h_aliases = 0;
+ hp = &def;
+ }
+ sn.sin_family = hp->h_addrtype;
+ if (hp->h_length > (int)sizeof(sn.sin_addr)) {
+ hp->h_length = sizeof(sn.sin_addr);
+ }
+ memcpy(&sn.sin_addr, hp->h_addr, hp->h_length);
+
+ if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
+ eprintf("finger: socket: %s\n", strerror(errno));
+ return;
+ }
+
+ /* print hostname before connecting, in case it takes a while */
+ xprintf("[%s]\n", hp->h_name);
+ if (connect(s, (struct sockaddr *)&sn, sizeof(sn)) < 0) {
+ eprintf("finger: connect: %s\n", strerror(errno));
+ close(s);
+ return;
+ }
+
+ /* -l flag for remote fingerd */
+ if (lflag) write(s, "/W ", 3);
+
+ /* send the name followed by <CR><LF> */
+ write(s, name, strlen(name));
+ write(s, "\r\n", 2);
+
+ /*
+ * Read from the remote system; once we're connected, we assume some
+ * data. If none arrives, we hang until the user interrupts.
+ *
+ * If we see a <CR> or a <CR> with the high bit set, treat it as
+ * a newline; if followed by a newline character, only output one
+ * newline.
+ *
+ * Text is sent to xputc() for printability analysis.
+ */
+ fp = fdopen(s, "r");
+ if (!fp) {
+ eprintf("finger: fdopen: %s\n", strerror(errno));
+ close(s);
+ return;
+ }
+
+ sawret = 0;
+ ateol = 1;
+ while ((c = getc(fp)) != EOF) {
+ c &= 0xff;
+ if (c == ('\r'|0x80) || c == ('\n'|0x80)) c &= 0x7f;
+ if (c == '\r') {
+ sawret = ateol = 1;
+ xputc('\n');
+ }
+ else if (sawret && c == '\n') {
+ sawret = 0;
+ /* don't print */
+ }
+ else {
+ if (c == '\n') ateol = 1;
+ sawret = 0;
+ xputc(c);
+ }
+ }
+ if (!ateol) xputc('\n');
+ fclose(fp);
+}