getnetconfig.c File Reference

#include <wintirpc.h>
#include <reentrant.h>
#include <stdio.h>
#include <errno.h>
#include <netconfig.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <rpc/rpc.h>
#include "rpc_com.h"

Include dependency graph for getnetconfig.c:

Go to the source code of this file.

Classes
struct	netconfig_info
struct	netconfig_list
struct	netconfig_vars

Macros
#define	NC_NONETCONFIG   ENOENT
#define	NC_NOMEM   ENOMEM
#define	NC_NOTINIT   EINVAL /* setnetconfig was not called first */
#define	NC_BADFILE   EBADF /* format for netconfig file is bad */
#define	NC_NOTFOUND   WSAENOPROTOOPT /* specified netid was not found */
#define	NC_TPI_CLTS_S   "tpi_clts"
#define	NC_TPI_COTS_S   "tpi_cots"
#define	NC_TPI_COTS_ORD_S   "tpi_cots_ord"
#define	NC_TPI_RAW_S   "tpi_raw"
#define	NC_NOFLAG_C   '-'
#define	NC_VISIBLE_C   'v'
#define	NC_BROADCAST_C   'b'
#define	NC_NOLOOKUP   "-"
#define	NC_VALID   0xfeed
#define	NC_STORAGE   0xf00d
#define	NC_INVALID   0
#define	MAXNETCONFIGLINE   1000
#define	nc_error   (*(__nc_error()))

Functions
static void	wintirpc_debug (char *fmt,...)
static int *	__nc_error (void)
static int	parse_ncp (char *, struct netconfig *)
static struct netconfig *	dup_ncp (struct netconfig *)
void *	setnetconfig ()
struct netconfig *	getnetconfig (void *handlep)
int	endnetconfig (void *handlep)
struct netconfig *	getnetconfigent (char *netid) const
void	freenetconfigent (struct netconfig *netconfigp)
char *	nc_sperror ()
void	nc_perror (char *s) const

Variables
static const char *const	_nc_errors []
static FILE *	nc_file
static struct netconfig_info	ni = { 0, 0, NULL, NULL}

Macro Definition Documentation

MAXNETCONFIGLINE

#define MAXNETCONFIGLINE   1000

Definition at line 160 of file getnetconfig.c.

NC_BADFILE

#define NC_BADFILE   EBADF /* format for netconfig file is bad */

Definition at line 97 of file getnetconfig.c.

NC_BROADCAST_C

#define NC_BROADCAST_C   'b'

Definition at line 113 of file getnetconfig.c.

nc_error

#define nc_error   (*(__nc_error()))

Definition at line 196 of file getnetconfig.c.

NC_INVALID

#define NC_INVALID   0

Definition at line 149 of file getnetconfig.c.

NC_NOFLAG_C

#define NC_NOFLAG_C   '-'

Definition at line 111 of file getnetconfig.c.

NC_NOLOOKUP

#define NC_NOLOOKUP   "-"

Definition at line 118 of file getnetconfig.c.

NC_NOMEM

#define NC_NOMEM   ENOMEM

Definition at line 95 of file getnetconfig.c.

NC_NONETCONFIG

#define NC_NONETCONFIG   ENOENT

Definition at line 94 of file getnetconfig.c.

NC_NOTFOUND

#define NC_NOTFOUND   WSAENOPROTOOPT /* specified netid was not found */

Definition at line 98 of file getnetconfig.c.

NC_NOTINIT

#define NC_NOTINIT   EINVAL /* setnetconfig was not called first */

Definition at line 96 of file getnetconfig.c.

NC_STORAGE

#define NC_STORAGE   0xf00d

Definition at line 148 of file getnetconfig.c.

NC_TPI_CLTS_S

#define NC_TPI_CLTS_S   "tpi_clts"

Definition at line 103 of file getnetconfig.c.

NC_TPI_COTS_ORD_S

#define NC_TPI_COTS_ORD_S   "tpi_cots_ord"

Definition at line 105 of file getnetconfig.c.

NC_TPI_COTS_S

#define NC_TPI_COTS_S   "tpi_cots"

Definition at line 104 of file getnetconfig.c.

NC_TPI_RAW_S

#define NC_TPI_RAW_S   "tpi_raw"

Definition at line 106 of file getnetconfig.c.

NC_VALID

#define NC_VALID   0xfeed

Definition at line 147 of file getnetconfig.c.

NC_VISIBLE_C

#define NC_VISIBLE_C   'v'

Definition at line 112 of file getnetconfig.c.

Function Documentation

__nc_error()

static int * __nc_error ( void  )

static

Definition at line 163 of file getnetconfig.c.

{
    extern mutex_t nc_lock;
    extern thread_key_t nc_key;
    static int nc_error = 0;
    int error, *nc_addr;
 
    /*
     * Use the static `nc_error' if we are the main thread
     * (including non-threaded programs), or if an allocation
     * fails.
     */
    if (nc_key == -1) {
        error = 0;
        mutex_lock(&nc_lock);
        if (nc_key == -1)
            error = nc_key = TlsAlloc();    //thr_keycreate(&nc_key, free);
        mutex_unlock(&nc_lock);
        if (error == TLS_OUT_OF_INDEXES)
            return (&nc_error);
    }
    if ((nc_addr = (int *)thr_getspecific(nc_key)) == NULL) {
        nc_addr = (int *)malloc(sizeof (int *));
        if (thr_setspecific(nc_key, (void *) nc_addr) == 0) {
            if (nc_addr)
                free(nc_addr);
            return (&nc_error);
        }
        *nc_addr = 0;
    }
    return (nc_addr);
}

dup_ncp()

static struct netconfig * dup_ncp ( struct netconfig *  ncp )

static

Definition at line 689 of file getnetconfig.c.

{
    struct netconfig    *p;
    char    *tmp;
    u_int   i;
 
    if ((tmp=malloc(MAXNETCONFIGLINE)) == NULL)
        return(NULL);
    if ((p=(struct netconfig *)malloc(sizeof(struct netconfig))) == NULL) {
        free(tmp);
        return(NULL);
    }
    /*
     * First we dup all the data from matched netconfig buffer.  Then we
     * adjust some of the member pointer to a pre-allocated buffer where
     * contains part of the data.
     * To follow the convention used in parse_ncp(), we store all the
     * necessary information in the pre-allocated buffer and let each
     * of the netconfig char pointer member point to the right address
     * in the buffer.
     */
    *p = *ncp;
    p->nc_netid = (char *)strcpy(tmp,ncp->nc_netid);
    tmp = strchr(tmp, 0) + 1;
    p->nc_protofmly = (char *)strcpy(tmp,ncp->nc_protofmly);
    tmp = strchr(tmp, 0) + 1;
    p->nc_proto = (char *)strcpy(tmp,ncp->nc_proto);
    tmp = strchr(tmp, 0) + 1;
    p->nc_device = (char *)strcpy(tmp,ncp->nc_device);
    p->nc_lookups = (char **)malloc((size_t)(p->nc_nlookups+1) * sizeof(char *));
    if (p->nc_lookups == NULL) {
        free(p->nc_netid);
        return(NULL);
    }
    for (i=0; i < p->nc_nlookups; i++) {
        tmp = strchr(tmp, 0) + 1;
        p->nc_lookups[i] = (char *)strcpy(tmp,ncp->nc_lookups[i]);
    }
    return(p);
}

Referenced by getnetconfigent().

endnetconfig()

int endnetconfig

(

void *

handlep

)

Definition at line 373 of file getnetconfig.c.

{
    struct netconfig_vars *nc_handlep = (struct netconfig_vars *)handlep;
 
    struct netconfig_list *q, *p;
 
    /*
     * Verify that handle is valid
     */
    if (nc_handlep == NULL || (nc_handlep->valid != NC_VALID &&
            nc_handlep->valid != NC_STORAGE)) {
        nc_error = NC_NOTINIT;
        return (-1);
    }
 
    /*
     * Return 0 if anyone still needs it.
     */
    nc_handlep->valid = NC_INVALID;
    nc_handlep->flag = 0;
    nc_handlep->nc_configs = NULL;
    if (--ni.ref > 0) {
        free(nc_handlep);
    return(0);
    }
 
    /*
     * Noone needs these entries anymore, then frees them.
     * Make sure all info in netconfig_info structure has been reinitialized.
     */
    q = p = ni.head;
    ni.eof = ni.ref = 0;
    ni.head = NULL;
    ni.tail = NULL;
    while (q) {
        p = q->next;
        if (q->ncp->nc_lookups != NULL) free(q->ncp->nc_lookups);
        free(q->ncp);
        free(q->linep);
        free(q);
        q = p;
    }
    free(nc_handlep);
 
    fclose(nc_file);
    nc_file = NULL;
    return (0);
}

Referenced by __rpc_endconf(), __rpc_getconfip(), __rpcbind_is_up(), _des_crypt_call(), endnetpath(), getkeyserv_handle(), local_rpcb(), and setnetpath().

freenetconfigent()

void freenetconfigent

(

struct netconfig *

netconfigp

)

Definition at line 530 of file getnetconfig.c.

{
    if (netconfigp != NULL) {
        free(netconfigp->nc_netid); /* holds all netconfigp's strings */
        if (netconfigp->nc_lookups != NULL)
            free(netconfigp->nc_lookups);
        free(netconfigp);
    }
    return;
}

Referenced by __rpc_sockinfo2netid(), __rpcb_findaddr_timed(), cache_get(), cache_set(), endnetpath(), get_client_for_netaddr(), nfs41_server_resolve(), pmap_set(), pmap_unset(), and svc_reg().

getnetconfig()

struct netconfig * getnetconfig

(

void *

handlep

)

Definition at line 253 of file getnetconfig.c.

{
    struct netconfig_vars *ncp = (struct netconfig_vars *)handlep;
    char *stringp;      /* tmp string pointer */
    struct netconfig_list   *list;
    struct netconfig *np;
 
    /*
     * Verify that handle is valid
     */
    if (ncp == NULL || nc_file == NULL) {
        nc_error = NC_NOTINIT;
        return (NULL);
    }
 
    switch (ncp->valid) {
    case NC_VALID:
    /*
     * If entry has already been read into the list,
     * we return the entry in the linked list.
     * If this is the first time call, check if there are any entries in
     * linked list.  If no entries, we need to read the netconfig db.
     * If we have been here and the next entry is there, we just return
     * it.
     */
    if (ncp->flag == 0) {   /* first time */
        ncp->flag = 1;
        ncp->nc_configs = ni.head;
        if (ncp->nc_configs != NULL)    /* entry already exist */
            return(ncp->nc_configs->ncp);
    }
    else if (ncp->nc_configs != NULL && ncp->nc_configs->next != NULL) {
        ncp->nc_configs = ncp->nc_configs->next;
        return(ncp->nc_configs->ncp);
    }
 
    /*
     * If we cannot find the entry in the list and is end of file,
     * we give up.
     */
    if (ni.eof == 1)
        return(NULL);
    break;
    default:
    nc_error = NC_NOTINIT;
    return (NULL);
    }
 
    stringp = (char *) malloc(MAXNETCONFIGLINE);
    if (stringp == NULL)
        return (NULL);
 
#ifdef MEM_CHK
    if (malloc_verify() == 0) {
    fprintf(stderr, "memory heap corrupted in getnetconfig\n");
    exit(1);
    }
#endif
 
    /*
     * Read a line from netconfig file.
     */
    do {
        if (fgets(stringp, MAXNETCONFIGLINE, nc_file) == NULL) {
            free(stringp);
            ni.eof = 1;
            return (NULL);
        }
    } while (*stringp == '#');
 
    list = (struct netconfig_list *) malloc(sizeof (struct netconfig_list));
    if (list == NULL) {
        free(stringp);
        return(NULL);
    }
    np = (struct netconfig *) malloc(sizeof (struct netconfig));
    if (np == NULL) {
        free(stringp);
    free(list);
        return(NULL);
    }
    list->ncp = np;
    list->next = NULL;
    list->ncp->nc_lookups = NULL;
    list->linep = stringp;
    wintirpc_debug("%s: before parse: &list->linep %p, list->linep %p, stringp %p\n", __FUNCTION__, &list->linep, list->linep, stringp);
    if (parse_ncp(stringp, list->ncp) == -1) {
        free(stringp);
        free(np);
        free(list);
        return (NULL);
    } else {
        wintirpc_debug("%s: after  parse: list->linep %p, stringp %p\n", __FUNCTION__, list->linep, stringp);
        /*
         * If this is the first entry that's been read, it is the head of
         * the list.  If not, put the entry at the end of the list.
         * Reposition the current pointer of the handle to the last entry
         * in the list.
         */
        if (ni.head == NULL) {  /* first entry */
            ni.head = ni.tail = list;
        }
        else {
            ni.tail->next = list;
            ni.tail = ni.tail->next;
        }
        ncp->nc_configs = ni.tail;
        return(ni.tail->ncp);
    }
}

Referenced by __rpc_getconf(), __rpc_getconfip(), __rpcbind_is_up(), _des_crypt_call(), getkeyserv_handle(), getnetpath(), and local_rpcb().

getnetconfigent()

struct netconfig * getnetconfigent

(

char *

netid

)

const

Definition at line 432 of file getnetconfig.c.

{
    FILE *file;     /* NETCONFIG db's file pointer */
    char *linep;    /* holds current netconfig line */
    char *stringp;  /* temporary string pointer */
    struct netconfig *ncp = NULL;   /* returned value */
    struct netconfig_list *list;    /* pointer to cache list */
 
    nc_error = NC_NOTFOUND; /* default error. */
    if (netid == NULL || strlen(netid) == 0) {
        return (NULL);
    }
 
    if (strcmp(netid, "unix") == 0) {
        fprintf(stderr, "The local transport is called \"unix\" ");
        fprintf(stderr, "in /etc/netconfig.\n");
        fprintf(stderr, "Please change this to \"local\" manually ");
        fprintf(stderr, "or run mergemaster(8).\n");
        fprintf(stderr, "See UPDATING entry 20021216 for details.\n");
        fprintf(stderr, "Continuing in 10 seconds\n\n");
        fprintf(stderr, "This warning will be removed 20030301\n");
        Sleep(10000);   // sleep(10);
    }
 
    /*
     * Look up table if the entries have already been read and parsed in
     * getnetconfig(), then copy this entry into a buffer and return it.
     * If we cannot find the entry in the current list and there are more
     * entries in the netconfig db that has not been read, we then read the
     * db and try find the match netid.
     * If all the netconfig db has been read and placed into the list and
     * there is no match for the netid, return NULL.
     */
    if (ni.head != NULL) {
        for (list = ni.head; list; list = list->next) {
            if (strcmp(list->ncp->nc_netid, netid) == 0) {
                return(dup_ncp(list->ncp));
            }
        }
        if (ni.eof == 1)    /* that's all the entries */
            return(NULL);
    }
 
 
    if ((file = fopen(NETCONFIG, "r")) == NULL) {
        nc_error = NC_NONETCONFIG;
        return (NULL);
    }
 
    if ((linep = malloc(MAXNETCONFIGLINE)) == NULL) {
        fclose(file);
        nc_error = NC_NOMEM;
        return (NULL);
    }
    do {
        ptrdiff_t len;
        char *tmpp; /* tmp string pointer */
 
        do {
            if ((stringp = fgets(linep, MAXNETCONFIGLINE, file)) == NULL) {
                break;
            }
        } while (*stringp == '#');
        if (stringp == NULL) {      /* eof */
            break;
        }
        if ((tmpp = strpbrk(stringp, "\t ")) == NULL) { /* can't parse file */
            nc_error = NC_BADFILE;
            break;
        }
        if (strlen(netid) == (size_t) (len = tmpp - stringp) && /* a match */
                strncmp(stringp, netid, (size_t)len) == 0) {
            if ((ncp = (struct netconfig *)
                malloc(sizeof (struct netconfig))) == NULL) {
                break;
            }
            ncp->nc_lookups = NULL;
            if (parse_ncp(linep, ncp) == -1) {
                free(ncp);
                ncp = NULL;
            }
            break;
        }
    } while (stringp != NULL);
    if (ncp == NULL) {
        free(linep);
    }
    fclose(file);
    return(ncp);
}

Referenced by __rpc_getconfip(), __rpc_sockinfo2netid(), __rpcb_findaddr_timed(), __rpcgettp(), cache_get(), cache_set(), get_client_for_netaddr(), getnetpath(), local_rpcb(), and nfs41_server_resolve().

nc_perror()

void nc_perror

(

char *

s

)

const

Definition at line 679 of file getnetconfig.c.

{
    fprintf(stderr, "%s: %s\n", s, nc_sperror());
}

nc_sperror()

char * nc_sperror

(

void

)

Definition at line 648 of file getnetconfig.c.

{
    const char *message;
 
    switch(nc_error) {
    case NC_NONETCONFIG:
        message = _nc_errors[0];
        break;
    case NC_NOMEM:
        message = _nc_errors[1];
        break;
    case NC_NOTINIT:
        message = _nc_errors[2];
        break;
    case NC_BADFILE:
        message = _nc_errors[3];
        break;
    case NC_NOTFOUND:
        message = _nc_errors[4];
        break;
    default:
        message = "Unknown network selection error";
    }
    /* LINTED const castaway */
    return ((char *)message);
}

Referenced by nc_perror().

parse_ncp()

static int parse_ncp ( char *  stringp, struct netconfig *  ncp  )

static

Definition at line 555 of file getnetconfig.c.

{
    char    *tokenp;    /* for processing tokens */
    char    *lasts;
 
    nc_error = NC_BADFILE;  /* nearly anything that breaks is for this reason */
    wintirpc_debug("%s: The last character being chopped is '%02x'\n", __FUNCTION__, stringp[strlen(stringp)-1]);
    wintirpc_debug("%s: The string before chopping is '%s'\n", __FUNCTION__, stringp);
    stringp[strlen(stringp)-1] = '\0';  /* get rid of newline */
    wintirpc_debug("%s: The last character after chopping is '%02x'\n", __FUNCTION__, stringp[strlen(stringp)-1]);
    wintirpc_debug("%s: The string after  chopping is '%s'\n", __FUNCTION__, stringp);
    /* netid */
    if ((ncp->nc_netid = strtok_r(stringp, "\t ", &lasts)) == NULL) {
        return (-1);
    }
 
    /* semantics */
    if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) {
        return (-1);
    }
    if (strcmp(tokenp, NC_TPI_COTS_ORD_S) == 0)
        ncp->nc_semantics = NC_TPI_COTS_ORD;
    else if (strcmp(tokenp, NC_TPI_COTS_S) == 0)
        ncp->nc_semantics = NC_TPI_COTS;
    else if (strcmp(tokenp, NC_TPI_CLTS_S) == 0)
        ncp->nc_semantics = NC_TPI_CLTS;
    else if (strcmp(tokenp, NC_TPI_RAW_S) == 0)
        ncp->nc_semantics = NC_TPI_RAW;
    else
        return (-1);
 
    /* flags */
    if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) {
        return (-1);
    }
    for (ncp->nc_flag = NC_NOFLAG; *tokenp != '\0';
        tokenp++) {
        switch (*tokenp) {
        case NC_NOFLAG_C:
            break;
        case NC_VISIBLE_C:
            ncp->nc_flag |= NC_VISIBLE;
            break;
        case NC_BROADCAST_C:
            ncp->nc_flag |= NC_BROADCAST;
            break;
        default:
            return (-1);
        }
    }
    /* protocol family */
    if ((ncp->nc_protofmly = strtok_r(NULL, "\t ", &lasts)) == NULL) {
        return (-1);
    }
    /* protocol name */
    if ((ncp->nc_proto = strtok_r(NULL, "\t ", &lasts)) == NULL) {
        return (-1);
    }
    /* network device */
    if ((ncp->nc_device = strtok_r(NULL, "\t ", &lasts)) == NULL) {
        return (-1);
    }
    if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) {
        return (-1);
    }
    if (strcmp(tokenp, NC_NOLOOKUP) == 0) {
        ncp->nc_nlookups = 0;
        ncp->nc_lookups = NULL;
    } else {
        char *cp;       /* tmp string */
 
        if (ncp->nc_lookups != NULL)    /* from last visit */
            free(ncp->nc_lookups);
        /* preallocate one string pointer */
        ncp->nc_lookups = (char **)malloc(sizeof (char *));
        ncp->nc_nlookups = 0;
        while ((cp = tokenp) != NULL) {
            tokenp = _get_next_token(cp, ',');
            ncp->nc_lookups[(size_t)ncp->nc_nlookups++] = cp;
            ncp->nc_lookups = (char **)realloc(ncp->nc_lookups,
            (size_t)(ncp->nc_nlookups+1) *sizeof(char *));  /* for next loop */
        }
    }
    return (0);
}

Referenced by getnetconfig(), and getnetconfigent().

setnetconfig()

void * setnetconfig

(

void

)

Definition at line 217 of file getnetconfig.c.

{
    struct netconfig_vars *nc_vars;
 
    if ((nc_vars = (struct netconfig_vars *)malloc(sizeof
        (struct netconfig_vars))) == NULL) {
        return(NULL);
    }
 
    /*
     * For multiple calls, i.e. nc_file is not NULL, we just return the
     * handle without reopening the netconfig db.
     */
    ni.ref++;
    if ((nc_file != NULL) || (nc_file = fopen(NETCONFIG, "r")) != NULL) {
        nc_vars->valid = NC_VALID;
        nc_vars->flag = 0;
        nc_vars->nc_configs = ni.head;
        return ((void *)nc_vars);
    }
    ni.ref--;
    nc_error = NC_NONETCONFIG;
    free(nc_vars);
    return (NULL);
}

Referenced by __rpc_getconfip(), __rpc_setconf(), __rpcbind_is_up(), _des_crypt_call(), getkeyserv_handle(), getnetpath(), local_rpcb(), and setnetpath().

wintirpc_debug()

static void wintirpc_debug ( char *  fmt,   ...  )

static

Definition at line 49 of file getnetconfig.c.

{
    return;
}

Referenced by getnetconfig(), and parse_ncp().

Variable Documentation

_nc_errors

const char* const _nc_errors[]

static

Initial value:

= {
    "Netconfig database not found",
    "Not enough memory",
    "Not initialized",
    "Netconfig database has invalid format",
    "Netid not found in netconfig database"
}

Definition at line 120 of file getnetconfig.c.

Referenced by nc_sperror().

nc_file

FILE* nc_file

static

Definition at line 157 of file getnetconfig.c.

Referenced by endnetconfig(), getnetconfig(), and setnetconfig().

ni

struct netconfig_info ni = { 0, 0, NULL, NULL}

static

Definition at line 158 of file getnetconfig.c.

Referenced by _CmdWndProc(), create_name(), endnetconfig(), getnetconfig(), getnetconfigent(), setnetconfig(), and UPDOWN_DoAction().