Package: netcat-openbsd / 1.195-2

dccp-support.patch Patch series | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 15:56:51 +0800
Subject: dccp support

---
 nc.1     |    4 ++
 netcat.c |   89 +++++++++++++++++++++++++++++++++++++++++++++++++++++----------
 2 files changed, 79 insertions(+), 14 deletions(-)

--- a/nc.1
+++ b/nc.1
@@ -33,7 +33,7 @@
 .Nd arbitrary TCP and UDP connections and listens
 .Sh SYNOPSIS
 .Nm nc
-.Op Fl 46CDdFhklNnrStUuvz
+.Op Fl 46CDdFhklNnrStUuvZz
 .Op Fl I Ar length
 .Op Fl i Ar interval
 .Op Fl M Ar ttl
@@ -289,6 +289,8 @@ An IPv6 address can be specified unambig
 in square brackets.
 A proxy cannot be used with any of the options
 .Fl lsuU .
+.It Fl Z
+DCCP mode.
 .It Fl z
 Only scan for listening daemons, without sending any data to them.
 Cannot be used together with
--- a/netcat.c
+++ b/netcat.c
@@ -147,6 +147,7 @@ int	rflag;					/* Random ports flag */
 char   *sflag;					/* Source Address */
 int	tflag;					/* Telnet Emulation */
 int	uflag;					/* UDP - Default to TCP */
+int	dccpflag;				/* DCCP - Default to TCP */
 int	vflag;					/* Verbosity */
 int	xflag;					/* Socks proxy */
 int	zflag;					/* Port Scan Flag */
@@ -226,6 +227,7 @@ ssize_t drainbuf(int, unsigned char *, s
 ssize_t fillbuf(int, unsigned char *, size_t *);
 # endif
 
+char *proto_name(int uflag, int dccpflag);
 static int connect_with_timeout(int fd, const struct sockaddr *sa,
         socklen_t salen, int ctimeout);
 
@@ -262,7 +264,7 @@ main(int argc, char *argv[])
 # if defined(TLS)
 	    "46C:cDde:FH:hI:i:K:klM:m:NnO:o:P:p:q:R:rSs:T:tUuV:vW:w:X:x:Z:z"))
 # else
-	    "46CDdFhI:i:klM:m:NnO:P:p:q:rSs:T:tUuV:vW:w:X:x:z"))
+	    "46CDdFhI:i:klM:m:NnO:P:p:q:rSs:T:tUuV:vW:w:X:x:Zz"))
 # endif
 	    != -1) {
 		switch (ch) {
@@ -379,6 +381,13 @@ main(int argc, char *argv[])
 		case 'u':
 			uflag = 1;
 			break;
+		case 'Z':
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+			dccpflag = 1;
+# else
+			errx(1, "no DCCP support available");
+# endif
+			break;
 		case 'V':
 # if defined(RT_TABLEID_MAX)
 			rtableid = (int)strtonum(optarg, 0,
@@ -483,6 +492,10 @@ main(int argc, char *argv[])
 
 	/* Cruft to make sure options are clean, and used properly. */
 	if (argv[0] && !argv[1] && family == AF_UNIX) {
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+		if (dccpflag)
+			errx(1, "cannot use -Z and -U");
+# endif
 		host = argv[0];
 		uport = NULL;
 	} else if (!argv[0] && lflag) {
@@ -576,8 +589,20 @@ main(int argc, char *argv[])
 	if (family != AF_UNIX) {
 		memset(&hints, 0, sizeof(struct addrinfo));
 		hints.ai_family = family;
-		hints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
-		hints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
+		if (uflag) {
+		    hints.ai_socktype = SOCK_DGRAM;
+		    hints.ai_protocol = IPPROTO_UDP;
+		}
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+		else if (dccpflag) {
+		    hints.ai_socktype = SOCK_DCCP;
+		    hints.ai_protocol = IPPROTO_DCCP;
+		}
+# endif
+		else {
+		    hints.ai_socktype = SOCK_STREAM;
+		    hints.ai_protocol = IPPROTO_TCP;
+		}
 		if (nflag)
 			hints.ai_flags |= AI_NUMERICHOST;
 	}
@@ -585,7 +610,10 @@ main(int argc, char *argv[])
 	if (xflag) {
 		if (uflag)
 			errx(1, "no proxy support for UDP mode");
-
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+		if (dccpflag)
+			errx(1, "no proxy support for DCCP mode");
+# endif
 		if (lflag)
 			errx(1, "no proxy support for listen");
 
@@ -827,19 +855,20 @@ main(int argc, char *argv[])
 					}
 				}
 
+				char *proto = proto_name(uflag, dccpflag);
 				/* Don't look up port if -n. */
 				if (nflag)
 					sv = NULL;
 				else {
 					sv = getservbyport(
 					    ntohs(atoi(portlist[i])),
-					    uflag ? "udp" : "tcp");
+					    proto);
 				}
 
 				fprintf(stderr,
 				    "Connection to %s %s port [%s/%s] "
 				    "succeeded!\n", host, portlist[i],
-				    uflag ? "udp" : "tcp",
+				    proto,
 				    sv ? sv->s_name : "*");
 			}
 			if (Fflag)
@@ -1049,6 +1078,24 @@ unix_listen(char *path)
 	return s;
 }
 
+char *proto_name(int uflag, int dccpflag) {
+
+    char *proto = NULL;
+    if (uflag) {
+	proto = "udp";
+    }
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+    else if (dccpflag) {
+	proto = "dccp";
+    }
+# endif
+    else {
+	proto = "tcp";
+    }
+
+    return proto;
+}
+
 /*
  * remote_connect()
  * Returns a socket connected to a remote host. Properly binds to a local
@@ -1079,8 +1126,21 @@ remote_connect(const char *host, const c
 # endif
 			memset(&ahints, 0, sizeof(struct addrinfo));
 			ahints.ai_family = res->ai_family;
-			ahints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
-			ahints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
+			if (uflag) {
+			    ahints.ai_socktype = SOCK_DGRAM;
+			    ahints.ai_protocol = IPPROTO_UDP;
+
+			}
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+			else if (dccpflag) {
+			    hints.ai_socktype = SOCK_DCCP;
+			    hints.ai_protocol = IPPROTO_DCCP;
+			}
+# endif
+			else {
+		    	    ahints.ai_socktype = SOCK_STREAM;
+			    ahints.ai_protocol = IPPROTO_TCP;
+			}
 			ahints.ai_flags = AI_PASSIVE;
 			if ((error = getaddrinfo(sflag, pflag, &ahints, &ares)))
 				errx(1, "getaddrinfo: %s", gai_strerror(error));
@@ -1092,15 +1152,16 @@ remote_connect(const char *host, const c
 		}
 
 		set_common_sockopts(s, res->ai_family);
+		char *proto = proto_name(uflag, dccpflag);
 
 		if ((error = connect_with_timeout(s, res->ai_addr, res->ai_addrlen, timeout)) == CONNECTION_SUCCESS)
 			break;
 		if (vflag && error == CONNECTION_FAILED)
 			warn("connect to %s port %s (%s) failed", host, port,
-			    uflag ? "udp" : "tcp");
-                else if (vflag && error == CONNECTION_TIMEOUT)
+			     proto);
+		else if (vflag && error == CONNECTION_TIMEOUT)
                     warn("connect to %s port %s (%s) timed out", host, port,
-                            uflag ? "udp" : "tcp");
+                            proto);
 
 		save_errno = errno;
 		close(s);
@@ -1696,7 +1757,8 @@ build_ports(char *p)
 	int hi, lo, cp;
 	int x = 0;
 
-	sv = getservbyname(p, uflag ? "udp" : "tcp");
+	char *proto = proto_name(uflag, dccpflag);
+	sv = getservbyname(p, proto);
 	if (sv) {
 		if (asprintf(&portlist[0], "%d", ntohs(sv->s_port)) < 0)
 			err(1, "asprintf");
@@ -2097,6 +2159,7 @@ help(void)
 	\t-w timeout	Timeout for connects and final net reads\n\
 	\t-X proto	Proxy protocol: \"4\", \"5\" (SOCKS) or \"connect\"\n\
 	\t-x addr[:port]\tSpecify proxy address and port\n\
+	\t-Z		DCCP mode\n\
 	\t-z		Zero-I/O mode [used for scanning]\n\
 	Port numbers can be individual or ranges: lo-hi [inclusive]\n");
 	exit(0);
@@ -2106,7 +2169,7 @@ void
 usage(int ret)
 {
 	fprintf(stderr,
-	    "usage: nc [-46CDdFhklNnrStUuvz] [-I length] [-i interval] [-M ttl]\n"
+	    "usage: nc [-46CDdFhklNnrStUuvZz] [-I length] [-i interval] [-M ttl]\n"
 	    "\t  [-m minttl] [-O length] [-P proxy_username] [-p source_port]\n"
 	    "\t  [-q seconds] [-s source] [-T keyword] [-V rtable] [-W recvlimit] "
 	    "[-w timeout]\n"