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- /*
- ** kernel/unicos6.c Low level kernel access functions for Cray UNICOS 6
- **
- ** 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 <nlist.h>
- #include <pwd.h>
- #include <signal.h>
- #include <syslog.h>
-
- #include "kvm.h"
-
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <sys/param.h>
- #include <sys/ioctl.h>
- #include <sys/socket.h>
-
- #define IP_SECURITY
-
- #include <sys/socketvar.h>
-
- #define KERNEL
-
- #include <sys/file.h>
-
- #include <fcntl.h>
-
- #include <sys/param.h>
- #include <sys/sysmacros.h>
-
- #include <sys/wait.h>
-
- #undef KERNEL
-
- #include <net/if.h>
- #include <net/route.h>
- #include <netinet/in.h>
-
- #include <netinet/in_pcb.h>
-
- #include <netinet/tcp.h>
- #include <netinet/ip_var.h>
- #include <netinet/tcp_timer.h>
- #include <netinet/tcp_var.h>
-
- #include <arpa/inet.h>
-
-
- #include "identd.h"
- #include "error.h"
-
-
- extern void *calloc();
- extern void *malloc();
-
-
- struct nlist nl[] =
- {
- #define N_TCB 0
-
- { "tcb" },
- { "" }
- };
-
- static kvm_t *kd;
-
- static struct file *xfile;
- static int nfile;
-
- static struct inpcb tcb;
-
-
- int k_open()
- {
- /*
- ** Open the kernel memory device
- */
- if (!(kd = kvm_open(path_unix, path_kmem, NULL, O_RDONLY, NULL)))
- ERROR("main: kvm_open");
-
- /*
- ** 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;
- {
- 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.
- */
- static struct socket *
- getlist(pcbp, faddr, fport, laddr, lport)
- struct inpcb *pcbp;
- struct in_addr *faddr;
- int fport;
- struct in_addr *laddr;
- int lport;
- {
- struct inpcb *head;
-
- if (!pcbp)
- return NULL;
-
-
- head = pcbp->inp_prev;
- do
- {
- if ( pcbp->inp_faddr.s_addr == faddr->s_addr &&
- pcbp->inp_laddr.s_addr == laddr->s_addr &&
- pcbp->inp_fport == fport &&
- pcbp->inp_lport == lport )
- return pcbp->inp_socket;
-
- } while (wtob((long) pcbp->inp_next) != (long) head &&
- getbuf(wtob((long) pcbp->inp_next), /* inp_next is a word ptr */
- pcbp,
- sizeof(struct inpcb),
- "tcblist"));
-
- 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;
- {
- long addr;
- struct socket *sockp;
- int i;
- struct socket sockbuf;
-
- /* -------------------- TCP PCB LIST -------------------- */
- if (!getbuf(nl[N_TCB].n_value, &tcb, sizeof(tcb), "tcb"))
- return -1;
-
- tcb.inp_prev = (struct inpcb *) nl[N_TCB].n_value;
- sockp = getlist(&tcb, faddr, fport, laddr, lport);
-
- if (!sockp)
- return -1;
-
- /*
- Creator of socket's uid is stored in the socket structure!!!
- No need to walk the file table...
- */
- if(!getbuf(wtob(sockp), &sockbuf, sizeof(sockbuf), "socket"))
- return -1;
- *uid = sockbuf.so_uid;
- return 0;
- }
-