OpenCoverage

canohost.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssh/src/canohost.c
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1/* $OpenBSD: canohost.c,v 1.73 2016/03/07 19:02:43 djm Exp $ */-
2/*-
3 * Author: Tatu Ylonen <ylo@cs.hut.fi>-
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland-
5 * All rights reserved-
6 * Functions for returning the canonical host name of the remote site.-
7 *-
8 * As far as I am concerned, the code I have written for this software-
9 * can be used freely for any purpose. Any derived versions of this-
10 * software must be clearly marked as such, and if the derived work is-
11 * incompatible with the protocol description in the RFC file, it must be-
12 * called by a name other than "ssh" or "Secure Shell".-
13 */-
14-
15#include "includes.h"-
16-
17#include <sys/types.h>-
18#include <sys/socket.h>-
19#include <sys/un.h>-
20-
21#include <netinet/in.h>-
22#include <arpa/inet.h>-
23-
24#include <errno.h>-
25#include <netdb.h>-
26#include <stdio.h>-
27#include <stdlib.h>-
28#include <string.h>-
29#include <stdarg.h>-
30#include <unistd.h>-
31-
32#include "xmalloc.h"-
33#include "packet.h"-
34#include "log.h"-
35#include "canohost.h"-
36#include "misc.h"-
37-
38void-
39ipv64_normalise_mapped(struct sockaddr_storage *addr, socklen_t *len)-
40{-
41 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *)addr;-
42 struct sockaddr_in *a4 = (struct sockaddr_in *)addr;-
43 struct in_addr inaddr;-
44 u_int16_t port;-
45-
46 if (addr->ss_family != AF_INET6 ||
addr->ss_family != 10Description
TRUEnever evaluated
FALSEnever evaluated
0
47 !IN6_IS_ADDR_V4MAPPED(&a6->sin6_addr))
! (__extension... (0xffff); }))Description
TRUEnever evaluated
FALSEnever evaluated
0
48 return;
never executed: return;
0
49-
50 debug3("Normalising mapped IPv4 in IPv6 address");-
51-
52 memcpy(&inaddr, ((char *)&a6->sin6_addr) + 12, sizeof(inaddr));-
53 port = a6->sin6_port;-
54-
55 memset(a4, 0, sizeof(*a4));-
56-
57 a4->sin_family = AF_INET;-
58 *len = sizeof(*a4);-
59 memcpy(&a4->sin_addr, &inaddr, sizeof(inaddr));-
60 a4->sin_port = port;-
61}
never executed: end of block
0
62-
63/*-
64 * Returns the local/remote IP-address/hostname of socket as a string.-
65 * The returned string must be freed.-
66 */-
67static char *-
68get_socket_address(int sock, int remote, int flags)-
69{-
70 struct sockaddr_storage addr;-
71 socklen_t addrlen;-
72 char ntop[NI_MAXHOST];-
73 int r;-
74-
75 /* Get IP address of client. */-
76 addrlen = sizeof(addr);-
77 memset(&addr, 0, sizeof(addr));-
78-
79 if (remote) {
remoteDescription
TRUEnever evaluated
FALSEnever evaluated
0
80 if (getpeername(sock, (struct sockaddr *)&addr, &addrlen) != 0)
getpeername(so...&addrlen) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
81 return NULL;
never executed: return ((void *)0) ;
0
82 } else {
never executed: end of block
0
83 if (getsockname(sock, (struct sockaddr *)&addr, &addrlen) != 0)
getsockname(so...&addrlen) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
84 return NULL;
never executed: return ((void *)0) ;
0
85 }
never executed: end of block
0
86-
87 /* Work around Linux IPv6 weirdness */-
88 if (addr.ss_family == AF_INET6) {
addr.ss_family == 10Description
TRUEnever evaluated
FALSEnever evaluated
0
89 addrlen = sizeof(struct sockaddr_in6);-
90 ipv64_normalise_mapped(&addr, &addrlen);-
91 }
never executed: end of block
0
92-
93 switch (addr.ss_family) {-
94 case AF_INET:
never executed: case 2 :
0
95 case AF_INET6:
never executed: case 10 :
0
96 /* Get the address in ascii. */-
97 if ((r = getnameinfo((struct sockaddr *)&addr, addrlen, ntop,
(r = getnamein..., flags)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
98 sizeof(ntop), NULL, 0, flags)) != 0) {
(r = getnamein..., flags)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
99 error("%s: getnameinfo %d failed: %s", __func__,-
100 flags, ssh_gai_strerror(r));-
101 return NULL;
never executed: return ((void *)0) ;
0
102 }-
103 return xstrdup(ntop);
never executed: return xstrdup(ntop);
0
104 case AF_UNIX:
never executed: case 1 :
0
105 /* Get the Unix domain socket path. */-
106 return xstrdup(((struct sockaddr_un *)&addr)->sun_path);
never executed: return xstrdup(((struct sockaddr_un *)&addr)->sun_path);
0
107 default:
never executed: default:
0
108 /* We can't look up remote Unix domain sockets. */-
109 return NULL;
never executed: return ((void *)0) ;
0
110 }-
111}-
112-
113char *-
114get_peer_ipaddr(int sock)-
115{-
116 char *p;-
117-
118 if ((p = get_socket_address(sock, 1, NI_NUMERICHOST)) != NULL)
(p = get_socke...!= ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
119 return p;
never executed: return p;
0
120 return xstrdup("UNKNOWN");
never executed: return xstrdup("UNKNOWN");
0
121}-
122-
123char *-
124get_local_ipaddr(int sock)-
125{-
126 char *p;-
127-
128 if ((p = get_socket_address(sock, 0, NI_NUMERICHOST)) != NULL)
(p = get_socke...!= ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
129 return p;
never executed: return p;
0
130 return xstrdup("UNKNOWN");
never executed: return xstrdup("UNKNOWN");
0
131}-
132-
133char *-
134get_local_name(int fd)-
135{-
136 char *host, myname[NI_MAXHOST];-
137-
138 /* Assume we were passed a socket */-
139 if ((host = get_socket_address(fd, 0, NI_NAMEREQD)) != NULL)
(host = get_so...!= ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
140 return host;
never executed: return host;
0
141-
142 /* Handle the case where we were passed a pipe */-
143 if (gethostname(myname, sizeof(myname)) == -1) {
gethostname(my...myname)) == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
144 verbose("%s: gethostname: %s", __func__, strerror(errno));-
145 host = xstrdup("UNKNOWN");-
146 } else {
never executed: end of block
0
147 host = xstrdup(myname);-
148 }
never executed: end of block
0
149-
150 return host;
never executed: return host;
0
151}-
152-
153/* Returns the local/remote port for the socket. */-
154-
155static int-
156get_sock_port(int sock, int local)-
157{-
158 struct sockaddr_storage from;-
159 socklen_t fromlen;-
160 char strport[NI_MAXSERV];-
161 int r;-
162-
163 /* Get IP address of client. */-
164 fromlen = sizeof(from);-
165 memset(&from, 0, sizeof(from));-
166 if (local) {
localDescription
TRUEnever evaluated
FALSEnever evaluated
0
167 if (getsockname(sock, (struct sockaddr *)&from, &fromlen) < 0) {
getsockname(so... &fromlen) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
168 error("getsockname failed: %.100s", strerror(errno));-
169 return 0;
never executed: return 0;
0
170 }-
171 } else {
never executed: end of block
0
172 if (getpeername(sock, (struct sockaddr *)&from, &fromlen) < 0) {
getpeername(so... &fromlen) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
173 debug("getpeername failed: %.100s", strerror(errno));-
174 return -1;
never executed: return -1;
0
175 }-
176 }
never executed: end of block
0
177-
178 /* Work around Linux IPv6 weirdness */-
179 if (from.ss_family == AF_INET6)
from.ss_family == 10Description
TRUEnever evaluated
FALSEnever evaluated
0
180 fromlen = sizeof(struct sockaddr_in6);
never executed: fromlen = sizeof(struct sockaddr_in6);
0
181-
182 /* Non-inet sockets don't have a port number. */-
183 if (from.ss_family != AF_INET && from.ss_family != AF_INET6)
from.ss_family != 2Description
TRUEnever evaluated
FALSEnever evaluated
from.ss_family != 10Description
TRUEnever evaluated
FALSEnever evaluated
0
184 return 0;
never executed: return 0;
0
185-
186 /* Return port number. */-
187 if ((r = getnameinfo((struct sockaddr *)&from, fromlen, NULL, 0,
(r = getnamein...rt), 2 )) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
188 strport, sizeof(strport), NI_NUMERICSERV)) != 0)
(r = getnamein...rt), 2 )) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
189 fatal("%s: getnameinfo NI_NUMERICSERV failed: %s", __func__,
never executed: fatal("%s: getnameinfo NI_NUMERICSERV failed: %s", __func__, ssh_gai_strerror(r));
0
190 ssh_gai_strerror(r));
never executed: fatal("%s: getnameinfo NI_NUMERICSERV failed: %s", __func__, ssh_gai_strerror(r));
0
191 return atoi(strport);
never executed: return atoi(strport);
0
192}-
193-
194int-
195get_peer_port(int sock)-
196{-
197 return get_sock_port(sock, 0);
never executed: return get_sock_port(sock, 0);
0
198}-
199-
200int-
201get_local_port(int sock)-
202{-
203 return get_sock_port(sock, 1);
never executed: return get_sock_port(sock, 1);
0
204}-
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