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bindresvport.c (55918) bindresvport.c (56629)
1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *

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26 * 2550 Garcia Avenue
27 * Mountain View, California 94043
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31/*static char *sccsid = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";*/
32/*static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";*/
33/*from: OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp */
1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *

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26 * 2550 Garcia Avenue
27 * Mountain View, California 94043
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31/*static char *sccsid = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";*/
32/*static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";*/
33/*from: OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp */
34static char *rcsid = "$FreeBSD: head/lib/libc/rpc/bindresvport.c 55918 2000-01-13 15:09:48Z shin $";
34static char *rcsid = "$FreeBSD: head/lib/libc/rpc/bindresvport.c 56629 2000-01-26 09:02:42Z shin $";
35#endif
36
37/*
38 * Copyright (c) 1987 by Sun Microsystems, Inc.
39 *
40 * Portions Copyright(C) 1996, Jason Downs. All rights reserved.
41 */
42

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50/*
51 * Bind a socket to a privileged IP port
52 */
53int
54bindresvport(sd, sin)
55 int sd;
56 struct sockaddr_in *sin;
57{
35#endif
36
37/*
38 * Copyright (c) 1987 by Sun Microsystems, Inc.
39 *
40 * Portions Copyright(C) 1996, Jason Downs. All rights reserved.
41 */
42

--- 7 unchanged lines hidden (view full) ---

50/*
51 * Bind a socket to a privileged IP port
52 */
53int
54bindresvport(sd, sin)
55 int sd;
56 struct sockaddr_in *sin;
57{
58 struct sockaddr_in myaddr;
59 int sinlen = sizeof(struct sockaddr_in);
60
61 if (sin == (struct sockaddr_in *)0) {
62 sin = &myaddr;
63 memset(sin, 0, sinlen);
64 sin->sin_len = sinlen;
65 sin->sin_family = AF_INET;
66 } else if (sin->sin_family != AF_INET) {
67 errno = EPFNOSUPPORT;
68 return (-1);
69 }
70
71 return (bindresvport2(sd, sin, sinlen));
58 return bindresvport_sa(sd, (struct sockaddr *)sin);
72}
73
59}
60
61/*
62 * Bind a socket to a privileged port for whatever protocol.
63 */
74int
64int
75bindresvport2(sd, sa, addrlen)
65bindresvport_sa(sd, sa)
76 int sd;
77 struct sockaddr *sa;
66 int sd;
67 struct sockaddr *sa;
78 socklen_t addrlen;
79{
68{
80 int on, old, error, level, optname;
81 u_short port;
69 int old, error, af;
70 struct sockaddr_storage myaddr;
71 struct sockaddr_in *sin;
72 struct sockaddr_in6 *sin6;
73 int proto, portrange, portlow;
74 u_int16_t port;
75 int salen;
82
83 if (sa == NULL) {
76
77 if (sa == NULL) {
84 errno = EINVAL;
78 salen = sizeof(myaddr);
79 sa = (struct sockaddr *)&myaddr;
80
81 if (getsockname(sd, sa, &salen) == -1)
82 return -1; /* errno is correctly set */
83
84 af = sa->sa_family;
85 memset(&myaddr, 0, salen);
86 } else
87 af = sa->sa_family;
88
89 if (af == AF_INET) {
90 proto = IPPROTO_IP;
91 portrange = IP_PORTRANGE;
92 portlow = IP_PORTRANGE_LOW;
93 sin = (struct sockaddr_in *)sa;
94 salen = sizeof(struct sockaddr_in);
95 port = sin->sin_port;
96 } else if (af == AF_INET6) {
97 proto = IPPROTO_IPV6;
98 portrange = IPV6_PORTRANGE;
99 portlow = IPV6_PORTRANGE_LOW;
100 sin6 = (struct sockaddr_in6 *)sa;
101 salen = sizeof(struct sockaddr_in6);
102 port = sin6->sin6_port;
103 } else {
104 errno = EPFNOSUPPORT;
85 return (-1);
86 }
105 return (-1);
106 }
87 switch (sa->sa_family) {
88 case AF_INET:
89 port = ntohs(((struct sockaddr_in *)sa)->sin_port);
90 level = IPPROTO_IP;
91 optname = IP_PORTRANGE;
92 on = IP_PORTRANGE_LOW;
93 break;
94#ifdef INET6
95 case AF_INET6:
96 port = ntohs(((struct sockaddr_in6 *)sa)->sin6_port);
97 level = IPPROTO_IPV6;
98 optname = IPV6_PORTRANGE;
99 on = IPV6_PORTRANGE_LOW;
100 break;
101#endif
102 default:
103 errno = EAFNOSUPPORT;
104 return (-1);
105 }
107 sa->sa_family = af;
108 sa->sa_len = salen;
106
107 if (port == 0) {
108 int oldlen = sizeof(old);
109
110 if (port == 0) {
111 int oldlen = sizeof(old);
109 error = getsockopt(sd, level, optname, &old, &oldlen);
112
113 error = getsockopt(sd, proto, portrange, &old, &oldlen);
110 if (error < 0)
114 if (error < 0)
111 return(error);
115 return (error);
112
116
113 error = setsockopt(sd, level, optname, &on, sizeof(on));
117 error = setsockopt(sd, proto, portrange, &portlow,
118 sizeof(portlow));
114 if (error < 0)
119 if (error < 0)
115 return(error);
120 return (error);
116 }
117
121 }
122
118 error = bind(sd, sa, addrlen);
123 error = bind(sd, sa, salen);
119
124
120 switch (sa->sa_family) {
121 case AF_INET:
122 port = ntohs(((struct sockaddr_in *)sa)->sin_port);
123 break;
124#ifdef INET6
125 case AF_INET6:
126 port = ntohs(((struct sockaddr_in6 *)sa)->sin6_port);
127 break;
128#endif
129 default: /* shoud not match here */
130 errno = EAFNOSUPPORT;
131 return (-1);
132 }
133 if (port == 0) {
134 int saved_errno = errno;
135
136 if (error) {
125 if (port == 0) {
126 int saved_errno = errno;
127
128 if (error) {
137 if (setsockopt(sd, level, optname,
138 &old, sizeof(old)) < 0)
129 if (setsockopt(sd, proto, portrange, &old,
130 sizeof(old)) < 0)
139 errno = saved_errno;
140 return (error);
141 }
142
131 errno = saved_errno;
132 return (error);
133 }
134
143 /* Hmm, what did the kernel assign... */
144 if (getsockname(sd, (struct sockaddr *)sa, &addrlen) < 0)
145 errno = saved_errno;
146 return (error);
135 if (sa != (struct sockaddr *)&myaddr) {
136 /* Hmm, what did the kernel assign... */
137 if (getsockname(sd, sa, &salen) < 0)
138 errno = saved_errno;
139 return (error);
140 }
147 }
148 return (error);
149}
141 }
142 return (error);
143}