3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2000-2005 The OpenLDAP Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
19 #ifndef HAVE_GETPEEREID
21 #include <sys/types.h>
22 #include <ac/unistd.h>
24 #include <ac/socket.h>
29 #include <grp.h> /* for NGROUPS on Tru64 5.1 */
31 #include <sys/ucred.h>
34 #if !defined(SO_PEERCRED) && !defined(LOCAL_PEERCRED) && \
35 defined(HAVE_SENDMSG) && (defined(HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS) || \
36 defined(HAVE_STRUCT_MSGHDR_MSG_CONTROL))
47 int getpeereid( int s, uid_t *euid, gid_t *egid )
50 #if defined( SO_PEERCRED )
51 struct ucred peercred;
52 socklen_t peercredlen = sizeof peercred;
54 if(( getsockopt( s, SOL_SOCKET, SO_PEERCRED,
55 (void *)&peercred, &peercredlen ) == 0 )
56 && ( peercredlen == sizeof peercred ))
63 #elif defined( LOCAL_PEERCRED )
64 struct xucred peercred;
65 socklen_t peercredlen = sizeof peercred;
67 if(( getsockopt( s, LOCAL_PEERCRED, 1,
68 (void *)&peercred, &peercredlen ) == 0 )
69 && ( peercred.cr_version == XUCRED_VERSION ))
71 *euid = peercred.cr_uid;
72 *egid = peercred.cr_gid;
75 #elif defined( DO_SENDMSG )
79 struct msghdr msg = {0};
80 # ifdef HAVE_STRUCT_MSGHDR_MSG_CONTROL
82 # define CMSG_SPACE(len) (_CMSG_ALIGN(sizeof(struct cmsghdr)) + _CMSG_ALIGN(len))
85 # define CMSG_LEN(len) (_CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
89 unsigned char control[CMSG_SPACE(sizeof(int))];
92 # endif /* HAVE_STRUCT_MSGHDR_MSG_CONTROL */
99 iov.iov_len = sizeof dummy;
102 # ifdef HAVE_STRUCT_MSGHDR_MSG_CONTROL
103 msg.msg_control = control_un.control;
104 msg.msg_controllen = sizeof( control_un.control );
106 cmsg = CMSG_FIRSTHDR( &msg );
109 * AIX returns a bogus file descriptor if recvmsg() is
110 * called with MSG_PEEK (is this a bug?). Hence we need
111 * to receive the Abandon PDU.
113 if( recvmsg( s, &msg, MSG_WAITALL ) >= 0 &&
114 cmsg->cmsg_len == CMSG_LEN( sizeof(int) ) &&
115 cmsg->cmsg_level == SOL_SOCKET &&
116 cmsg->cmsg_type == SCM_RIGHTS )
118 msg.msg_accrights = (char *)fd;
119 msg.msg_accrightslen = sizeof(fd);
120 if( recvmsg( s, &msg, MSG_PEEK) >= 0 && msg.msg_accrightslen == sizeof(int) )
121 # endif /* HAVE_STRUCT_MSGHDR_MSG_CONTROL*/
123 /* We must receive a valid descriptor, it must be a pipe,
124 * and it must only be accessible by its owner.
126 # ifdef HAVE_STRUCT_MSGHDR_MSG_CONTROL
127 fd[0] = (*(int *)CMSG_DATA( cmsg ));
129 err = fstat( fd[0], &st );
131 if( err == 0 && S_ISFIFO(st.st_mode) &&
132 ((st.st_mode & (S_IRWXG|S_IRWXO)) == 0))
139 #elif defined(SOCKCREDSIZE)
146 memset(&msg, 0, sizeof msg);
147 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS));
148 if (crmsgsize == 0) goto sc_err;
149 crmsg = malloc(crmsgsize);
150 if (crmsg == NULL) goto sc_err;
151 memset(crmsg, 0, crmsgsize);
153 msg.msg_control = crmsg;
154 msg.msg_controllen = crmsgsize;
156 if (recvmsg(s, &msg, 0) < 0) {
161 if (msg.msg_controllen == 0 || (msg.msg_flags & MSG_CTRUNC) != 0) {
166 cmp = CMSG_FIRSTHDR(&msg);
167 if (cmp->cmsg_level != SOL_SOCKET || cmp->cmsg_type != SCM_CREDS) {
172 sc = (struct sockcred *)(void *)CMSG_DATA(cmp);
182 #endif /* LDAP_PF_LOCAL */
187 #endif /* HAVE_GETPEEREID */