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Replace the old SCM_CREDS cred procedures. They can now be

Browse Source 
replaced just fine with getpeereid() and the whole code
gets a lot simpler. We don't break the ABI, since all server
programms use __rpc_get_local_uid(), and we just change library
internals.

Reviewed by:	des
This commit is contained in:
Martin Blapp 2003-06-15 10:32:01 +00:00
parent d005495293
commit ce9bc43cb3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=116391
2 changed files with 21 additions and 127 deletions
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5
include/rpc/svc.h
View File

@ -143,11 +143,6 @@ struct svc_req {
*/
#define svc_getrpccaller(x) (&(x)->xp_rtaddr)
/*
* FreeBSD-only definition to get the creds of the caller (AF_LOCAL).
*/
#define __svc_getcallercreds(x) ((struct cmsgcred *)(x)->xp_p2)
/*
* Operations defined on an SVCXPRT handle
*

143
lib/libc/rpc/svc_vc.c
View File

@ -70,11 +70,6 @@ __FBSDID("$FreeBSD$");
#include "rpc_com.h"
#include "un-namespace.h"
struct cmessage {
struct cmsghdr cmsg;
struct cmsgcred cmcred;
};
extern rwlock_t svc_fd_lock;
static SVCXPRT *makefd_xprt(int, u_int, u_int);
@ -94,7 +89,6 @@ static void svc_vc_ops(SVCXPRT *);
static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
void *in);
static int __msgread_withcred(int, void *, size_t, struct cmessage *);
static int __msgwrite(int, void *, size_t);
struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
@ -476,8 +470,6 @@ read_vc(xprtp, buf, len)
int sock;
int milliseconds = 35 * 1000;
struct pollfd pollfd;
struct sockaddr *sa;
struct cmessage *cm;
struct cf_conn *cfp;
xprt = (SVCXPRT *)xprtp;
@ -487,15 +479,8 @@ read_vc(xprtp, buf, len)
cfp = (struct cf_conn *)xprt->xp_p1;
cm = NULL;
sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
if (cfp->nonblock) {
if (sa->sa_family == AF_LOCAL) {
cm = (struct cmessage *)xprt->xp_verf.oa_base;
if ((len = __msgread_withcred(sock, buf, len, cm)) > 0)
xprt->xp_p2 = &cm->cmcred;
} else
len = _read(sock, buf, (size_t)len);
len = _read(sock, buf, (size_t)len);
if (len < 0) {
if (errno == EAGAIN)
len = 0;
@ -524,18 +509,9 @@ read_vc(xprtp, buf, len)
}
} while ((pollfd.revents & POLLIN) == 0);
if (sa->sa_family == AF_LOCAL) {
cm = (struct cmessage *)xprt->xp_verf.oa_base;
if ((len = __msgread_withcred(sock, buf, len, cm)) > 0) {
xprt->xp_p2 = &cm->cmcred;
return (len);
} else
goto fatal_err;
} else {
if ((len = _read(sock, buf, (size_t)len)) > 0) {
gettimeofday(&cfp->last_recv_time, NULL);
return (len);
}
if ((len = _read(sock, buf, (size_t)len)) > 0) {
gettimeofday(&cfp->last_recv_time, NULL);
return (len);
}
fatal_err:
@ -555,7 +531,6 @@ write_vc(xprtp, buf, len)
{
SVCXPRT *xprt;
int i, cnt;
struct sockaddr *sa;
struct cf_conn *cd;
struct timeval tv0, tv1;
@ -567,12 +542,8 @@ write_vc(xprtp, buf, len)
if (cd->nonblock)
gettimeofday(&tv0, NULL);
sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
for (cnt = len; cnt > 0; cnt -= i, buf += i) {
if (sa->sa_family == AF_LOCAL)
i = __msgwrite(xprt->xp_fd, buf, (size_t)cnt);
else
i = _write(xprt->xp_fd, buf, (size_t)cnt);
i = _write(xprt->xp_fd, buf, (size_t)cnt);
if (i < 0) {
if (errno != EAGAIN || !cd->nonblock) {
cd->strm_stat = XPRT_DIED;
@ -747,98 +718,26 @@ svc_vc_rendezvous_ops(xprt)
mutex_unlock(&ops_lock);
}
int
__msgread_withcred(sock, buf, cnt, cmp)
int sock;
void *buf;
size_t cnt;
struct cmessage *cmp;
{
struct iovec iov[1];
struct msghdr msg;
union {
struct cmsghdr cmsg;
char control[CMSG_SPACE(sizeof(struct cmsgcred))];
} cm;
int ret;
bzero(&cm, sizeof(cm));
iov[0].iov_base = buf;
iov[0].iov_len = cnt;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_control = &cm;
msg.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
msg.msg_flags = 0;
ret = _recvmsg(sock, &msg, 0);
bcopy(&cm.cmsg, &cmp->cmsg, sizeof(cmp->cmsg));
bcopy(CMSG_DATA(&cm), &cmp->cmcred, sizeof(cmp->cmcred));
if ((msg.msg_flags & MSG_CTRUNC) != 0)
return (-1);
return (ret);
}
static int
__msgwrite(sock, buf, cnt)
int sock;
void *buf;
size_t cnt;
{
struct iovec iov[1];
struct msghdr msg;
struct cmessage cm;
bzero((char *)&cm, sizeof(cm));
iov[0].iov_base = buf;
iov[0].iov_len = cnt;
cm.cmsg.cmsg_type = SCM_CREDS;
cm.cmsg.cmsg_level = SOL_SOCKET;
cm.cmsg.cmsg_len = sizeof(struct cmessage);
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_control = &cm;
msg.msg_controllen = sizeof(struct cmessage);
msg.msg_flags = 0;
return(_sendmsg(sock, &msg, 0));
}
/*
* Get the effective UID of the sending process. Used by rpcbind and keyserv
* (AF_LOCAL).
* Get the effective UID of the sending process. Used by rpcbind, keyserv
* and rpc.yppasswdd on AF_LOCAL.
*/
int
__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid)
{
struct cmsgcred *cmcred;
struct cmessage *cm;
struct cmsghdr *cmp;
cm = (struct cmessage *)transp->xp_verf.oa_base;
if (cm == NULL)
__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
int sock, ret;
gid_t egid;
uid_t euid;
struct sockaddr *sa;
sock = transp->xp_fd;
sa = (struct sockaddr *)transp->xp_rtaddr.buf;
if (sa->sa_family == AF_LOCAL) {
ret = getpeereid(sock, &euid, &egid);
if (ret == 0)
*uid = euid;
return (ret);
} else
return (-1);
cmp = &cm->cmsg;
if (cmp == NULL || cmp->cmsg_level != SOL_SOCKET ||
cmp->cmsg_type != SCM_CREDS)
return (-1);
cmcred = __svc_getcallercreds(transp);
if (cmcred == NULL)
return (-1);
*uid = cmcred->cmcred_euid;
return (0);
}
/*