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-rw-r--r--libexec/identd/openbsd.c279
1 files changed, 96 insertions, 183 deletions
diff --git a/libexec/identd/openbsd.c b/libexec/identd/openbsd.c
index d54b84e6135..f28348b4296 100644
--- a/libexec/identd/openbsd.c
+++ b/libexec/identd/openbsd.c
@@ -1,57 +1,40 @@
/*
-** $Id: openbsd.c,v 1.5 1997/07/23 20:36:28 kstailey Exp $
-**
-** openbsd.c Low level kernel access functions for OpenBSD
-**
-** This program is in the public domain and may be used freely by anyone
-** who wants to.
-**
-** Last update: 17 March 1993
-**
-** Please send bug fixes/bug reports to: Peter Eriksson <pen@lysator.liu.se>
-*/
-
-#include <stdio.h>
-#include <errno.h>
-#include <ctype.h>
-#include <limits.h>
-#include <nlist.h>
-#include <pwd.h>
-#include <signal.h>
-#include <syslog.h>
-
-#include "kvm.h"
+ * This program is in the public domain and may be used freely by anyone
+ * who wants to.
+ *
+ * Please send bug fixes/bug reports to: Peter Eriksson <pen@lysator.liu.se>
+ */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
-
#include <sys/socketvar.h>
-
+#include <sys/user.h>
+#include <sys/wait.h>
#define _KERNEL
-
#include <sys/file.h>
-
#undef _KERNEL
#include <sys/sysctl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <ctype.h>
+#include <limits.h>
+#include <nlist.h>
+#include <pwd.h>
+#include <signal.h>
+#include <syslog.h>
+#include <kvm.h>
#include <fcntl.h>
-#include <sys/user.h>
-
-#include <sys/wait.h>
-
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
-
#include <netinet/in_systm.h>
#include <netinet/ip.h>
-
#include <netinet/in_pcb.h>
-
#include <netinet/tcp.h>
#include <netinet/ip_var.h>
#include <netinet/tcp_timer.h>
@@ -62,191 +45,121 @@
#include "identd.h"
#include "error.h"
-
-extern void *calloc();
-extern void *malloc();
-
-
-struct nlist nl[] =
-{
-#define N_FILE 0
-#define N_NFILE 1
-#define N_TCBTABLE 2
-
- { "_filehead" },
- { "_nfiles" },
- { "_tcbtable" },
- { "" }
+struct nlist nl[] = {
+#define N_TCBTABLE 0
+ {"_tcbtable"},
+ {""}
};
static kvm_t *kd;
-
-static struct file *xfile;
-static int nfile;
-
static struct inpcbtable tcbtable;
-
-int k_open()
+int
+k_open()
{
- char errbuf[_POSIX2_LINE_MAX];
-
- /*
- ** Open the kernel memory device
- */
- if ((kd = kvm_openfiles(path_unix, path_kmem, NULL, O_RDONLY, errbuf)) ==
- NULL)
- ERROR1("main: kvm_open: %s", errbuf);
-
- /*
- ** Extract offsets to the needed variables in the kernel
- */
- if (kvm_nlist(kd, nl) < 0)
- ERROR("main: kvm_nlist");
-
- return 0;
+ char errbuf[_POSIX2_LINE_MAX];
+
+ /*
+ ** Open the kernel memory device
+ */
+ if ((kd = kvm_openfiles(path_unix, path_kmem, NULL, O_RDONLY, errbuf)) ==
+ NULL)
+ ERROR1("main: kvm_open: %s", errbuf);
+
+ /*
+ ** Extract offsets to the needed variables in the kernel
+ */
+ if (kvm_nlist(kd, nl) < 0)
+ ERROR("main: kvm_nlist");
+
+ return 0;
}
/*
-** Get a piece of kernel memory with error handling.
-** Returns 1 if call succeeded, else 0 (zero).
-*/
-static int getbuf(addr, buf, len, what)
- long addr;
- char *buf;
- int len;
- char *what;
+ * Get a piece of kernel memory with error handling.
+ * Returns 1 if call succeeded, else 0 (zero).
+ */
+static int
+getbuf(addr, buf, len, what)
+ long addr;
+ char *buf;
+ int len;
+ char *what;
{
- if (kvm_read(kd, addr, buf, len) < 0)
- {
- if (syslog_flag)
- syslog(LOG_ERR, "getbuf: kvm_read(%08x, %d) - %s : %m",
- addr, len, what);
-
- return 0;
- }
-
- return 1;
+ if (kvm_read(kd, addr, buf, len) < 0) {
+ if (syslog_flag)
+ syslog(LOG_ERR, "getbuf: kvm_read(%08x, %d) - %s : %m",
+ addr, len, what);
+
+ return 0;
+ }
+ return 1;
}
/*
-** Traverse the inpcb list until a match is found.
-** Returns NULL if no match.
-*/
+ * Traverse the inpcb list until a match is found.
+ * Returns NULL if no match.
+ */
static struct socket *
getlist(tcbtablep, ktcbtablep, faddr, fport, laddr, lport)
struct inpcbtable *tcbtablep, *ktcbtablep;
struct in_addr *faddr;
- int fport;
+ int fport;
struct in_addr *laddr;
- int lport;
+ int lport;
{
struct inpcb *kpcbp, pcb;
if (!tcbtablep)
- return NULL;
-
+ return (NULL);
+
for (kpcbp = tcbtablep->inpt_queue.cqh_first;
- kpcbp != (struct inpcb *)ktcbtablep;
- kpcbp = pcb.inp_queue.cqe_next) {
+ kpcbp != (struct inpcb *) ktcbtablep;
+ kpcbp = pcb.inp_queue.cqe_next) {
if (!getbuf((long) kpcbp, &pcb, sizeof(struct inpcb), "tcb"))
break;
if (pcb.inp_faddr.s_addr == faddr->s_addr &&
pcb.inp_laddr.s_addr == laddr->s_addr &&
- pcb.inp_fport == fport &&
- pcb.inp_lport == lport )
- return pcb.inp_socket;
+ pcb.inp_fport == fport && pcb.inp_lport == lport)
+ return (pcb.inp_socket);
}
- return NULL;
+ return (NULL);
}
/*
-** Return the user number for the connection owner
-*/
-int k_getuid(faddr, fport, laddr, lport, uid)
- struct in_addr *faddr;
- int fport;
- struct in_addr *laddr;
- int lport;
- int *uid;
+ * Return the user number for the connection owner
+ */
+int
+k_getuid(faddr, fport, laddr, lport, uid)
+ struct in_addr *faddr;
+ int fport;
+ struct in_addr *laddr;
+ int lport;
+ int *uid;
{
- long addr;
- struct socket *sockp, sock;
- int i, mib[2];
- struct ucred ucb;
-
- /* -------------------- FILE DESCRIPTOR TABLE -------------------- */
- if (!getbuf(nl[N_NFILE].n_value, &nfile, sizeof(nfile), "nfile"))
- return -1;
-
- if (!getbuf(nl[N_FILE].n_value, &addr, sizeof(addr), "&file"))
- return -1;
-
- {
- size_t siz;
- int rv;
-
- mib[0] = CTL_KERN;
- mib[1] = KERN_FILE;
- if ((rv = sysctl(mib, 2, NULL, &siz, NULL, 0)) == -1)
- {
- ERROR1("k_getuid: sysctl 1 (%d)", rv);
- return -1;
- }
- xfile = malloc(siz);
- if (!xfile)
- ERROR1("k_getuid: malloc(%d)", siz);
- if ((rv = sysctl(mib, 2, xfile, &siz, NULL, 0)) == -1)
- {
- ERROR1("k_getuid: sysctl 2 (%d)", rv);
- return -1;
- }
- xfile = (struct file *)((char *)xfile + sizeof(filehead));
- }
-
- /* -------------------- TCP PCB LIST -------------------- */
- if (!getbuf(nl[N_TCBTABLE].n_value, &tcbtable, sizeof(tcbtable), "tcbtable"))
- return -1;
-
- sockp = getlist(&tcbtable, nl[N_TCBTABLE].n_value, faddr, fport, laddr,
- lport);
-
- if (!sockp)
- return -1;
-
-#ifdef SS_CONNECTOUT
- if (!getbuf(sockp, &sock, sizeof sock, "socket"))
- return -1;
-
- if ((sock.so_state & SS_CONNECTOUT) == 0)
- return -1;
-#endif
-
- /*
- ** Locate the file descriptor that has the socket in question
- ** open so that we can get the 'ucred' information
- */
- for (i = 0; i < nfile; i++)
- {
- if (xfile[i].f_count == 0)
- continue;
-
- if (xfile[i].f_type == DTYPE_SOCKET &&
- (struct socket *) xfile[i].f_data == sockp)
- {
- if (!getbuf(xfile[i].f_cred, &ucb, sizeof(ucb), "ucb"))
- return -1;
-
- *uid = ucb.cr_uid;
- return 0;
- }
- }
-
- return -1;
+ struct socket *sockp, sock;
+ int i, mib[2];
+ struct ucred ucb;
+ size_t siz;
+ int rv;
+
+ if (!getbuf(nl[N_TCBTABLE].n_value, &tcbtable, sizeof(tcbtable), "tcbtable"))
+ return -1;
+
+ sockp = getlist(&tcbtable, nl[N_TCBTABLE].n_value, faddr, fport, laddr,
+ lport);
+ if (!sockp)
+ return -1;
+
+ if (!getbuf(sockp, &sock, sizeof sock, "socket"))
+ return -1;
+ if ((sock.so_state & SS_CONNECTOUT) == 0)
+ return -1;
+ *uid = sock.so_uid;
+ return (0);
}
-
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