nsswitch/winbind_client.h

ソースコードを見る。

関数
void	init_request (struct winbindd_request *req, int rq_type)
NSS_STATUS	winbindd_send_request (int req_type, int need_priv, struct winbindd_request *request)
NSS_STATUS	winbindd_get_response (struct winbindd_response *response)
NSS_STATUS	winbindd_request_response (int req_type, struct winbindd_request *request, struct winbindd_response *response)
NSS_STATUS	winbindd_priv_request_response (int req_type, struct winbindd_request *request, struct winbindd_response *response)
int	write_sock (void *buffer, int count, int recursing, int need_priv)
int	read_reply (struct winbindd_response *response)
void	close_sock (void)
void	free_response (struct winbindd_response *response)

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関数

void init_request	(	struct winbindd_request *	req,
		int	rq_type
	)

wb_common.c の 50 行で定義されています。

参照先 winbindd_request::cmd・winbindd_request::length・winbindd_request::pid.

参照元 pam_winbind_request()・winbindd_send_request().

{
        request->length = sizeof(struct winbindd_request);

        request->cmd = (enum winbindd_cmd)request_type;
        request->pid = getpid();

}

NSS_STATUS winbindd_send_request	(	int	req_type,
		int	need_priv,
		struct winbindd_request *	request
	)

wb_common.c の 556 行で定義されています。

参照先 errno・winbindd_request::flags・init_request()・NSS_STATUS_NOTFOUND・NSS_STATUS_SUCCESS・NSS_STATUS_UNAVAIL・winbind_env_set()・write_sock().

参照元 send_next_request()・winbindd_priv_request_response()・winbindd_request_response().

{
        struct winbindd_request lrequest;

        /* Check for our tricky environment variable */

        if (winbind_env_set()) {
                return NSS_STATUS_NOTFOUND;
        }

        if (!request) {
                ZERO_STRUCT(lrequest);
                request = &lrequest;
        }
        
        /* Fill in request and send down pipe */

        init_request(request, req_type);
        
        if (write_sock(request, sizeof(*request),
                       request->flags & WBFLAG_RECURSE, need_priv) == -1) {
                /* Set ENOENT for consistency.  Required by some apps */
                errno = ENOENT;
                
                return NSS_STATUS_UNAVAIL;
        }

        if ((request->extra_len != 0) &&
            (write_sock(request->extra_data.data, request->extra_len,
                        request->flags & WBFLAG_RECURSE, need_priv) == -1)) {
                /* Set ENOENT for consistency.  Required by some apps */
                errno = ENOENT;

                return NSS_STATUS_UNAVAIL;
        }
        
        return NSS_STATUS_SUCCESS;
}

NSS_STATUS winbindd_get_response

(

struct winbindd_response *

response

)

wb_common.c の 600 行で定義されています。

参照先 errno・free_response()・init_response()・NSS_STATUS_NOTFOUND・NSS_STATUS_SUCCESS・NSS_STATUS_UNAVAIL・read_reply()・winbindd_response::result・WINBINDD_OK.

参照元 winbind_callback()・winbindd_priv_request_response()・winbindd_request_response().

{
        struct winbindd_response lresponse;

        if (!response) {
                ZERO_STRUCT(lresponse);
                response = &lresponse;
        }

        init_response(response);

        /* Wait for reply */
        if (read_reply(response) == -1) {
                /* Set ENOENT for consistency.  Required by some apps */
                errno = ENOENT;

                return NSS_STATUS_UNAVAIL;
        }

        /* Throw away extra data if client didn't request it */
        if (response == &lresponse) {
                free_response(response);
        }

        /* Copy reply data from socket */
        if (response->result != WINBINDD_OK) {
                return NSS_STATUS_NOTFOUND;
        }
        
        return NSS_STATUS_SUCCESS;
}

NSS_STATUS winbindd_request_response	(	int	req_type,
		struct winbindd_request *	request,
		struct winbindd_response *	response
	)

wb_common.c の 634 行で定義されています。

{
        NSS_STATUS status = NSS_STATUS_UNAVAIL;
        int count = 0;

        while ((status == NSS_STATUS_UNAVAIL) && (count < 10)) {
                status = winbindd_send_request(req_type, 0, request);
                if (status != NSS_STATUS_SUCCESS) 
                        return(status);
                status = winbindd_get_response(response);
                count += 1;
        }

        return status;
}

NSS_STATUS winbindd_priv_request_response	(	int	req_type,
		struct winbindd_request *	request,
		struct winbindd_response *	response
	)

wb_common.c の 652 行で定義されています。

参照先 NSS_STATUS_SUCCESS・NSS_STATUS_UNAVAIL・status・winbindd_get_response()・winbindd_send_request().

参照元 check_winbind_security().

{
        NSS_STATUS status = NSS_STATUS_UNAVAIL;
        int count = 0;

        while ((status == NSS_STATUS_UNAVAIL) && (count < 10)) {
                status = winbindd_send_request(req_type, 1, request);
                if (status != NSS_STATUS_SUCCESS) 
                        return(status);
                status = winbindd_get_response(response);
                count += 1;
        }

        return status;
}

int write_sock	(	void *	buffer,
		int	count,
		int	recursing,
		int	need_priv
	)

wb_common.c の 361 行で定義されています。

参照先 close_sock()・errno・result・winbind_open_pipe_sock()・winbindd_fd.

参照元 pam_winbind_request()・winbindd_send_request().

{
        int result, nwritten;
        
        /* Open connection to winbind daemon */
        
 restart:
        
        if (winbind_open_pipe_sock(recursing, need_priv) == -1) {
                errno = ENOENT;
                return -1;
        }
        
        /* Write data to socket */
        
        nwritten = 0;
        
        while(nwritten < count) {
                struct timeval tv;
                fd_set r_fds;
                
                /* Catch pipe close on other end by checking if a read()
                   call would not block by calling select(). */

                FD_ZERO(&r_fds);
                FD_SET(winbindd_fd, &r_fds);
                ZERO_STRUCT(tv);
                
                if (select(winbindd_fd + 1, &r_fds, NULL, NULL, &tv) == -1) {
                        close_sock();
                        return -1;                   /* Select error */
                }
                
                /* Write should be OK if fd not available for reading */
                
                if (!FD_ISSET(winbindd_fd, &r_fds)) {
                        
                        /* Do the write */
                        
                        result = write(winbindd_fd,
                                       (char *)buffer + nwritten, 
                                       count - nwritten);
                        
                        if ((result == -1) || (result == 0)) {
                                
                                /* Write failed */
                                
                                close_sock();
                                return -1;
                        }
                        
                        nwritten += result;
                        
                } else {
                        
                        /* Pipe has closed on remote end */
                        
                        close_sock();
                        goto restart;
                }
        }
        
        return nwritten;
}

int read_reply

(

struct winbindd_response *

response

)

wb_common.c の 494 行で定義されています。

参照先 winbindd_response::data・winbindd_response::extra_data・free_response()・winbindd_response::length・read_sock().

参照元 pam_winbind_request()・winbindd_get_response().

{
        int result1, result2 = 0;

        if (!response) {
                return -1;
        }
        
        /* Read fixed length response */
        
        if ((result1 = read_sock(response, sizeof(struct winbindd_response)))
            == -1) {
                
                return -1;
        }
        
        /* We actually send the pointer value of the extra_data field from
           the server.  This has no meaning in the client's address space
           so we clear it out. */

        response->extra_data.data = NULL;

        /* Read variable length response */
        
        if (response->length > sizeof(struct winbindd_response)) {
                int extra_data_len = response->length - 
                        sizeof(struct winbindd_response);
                
                /* Mallocate memory for extra data */
                
                if (!(response->extra_data.data = malloc(extra_data_len))) {
                        return -1;
                }
                
                if ((result2 = read_sock(response->extra_data.data, extra_data_len))
                    == -1) {
                        free_response(response);
                        return -1;
                }
        }
        
        /* Return total amount of data read */
        
        return result1 + result2;
}

void close_sock

(

void

)

wb_common.c の 70 行で定義されています。

参照先 winbindd_fd.

参照元 pam_winbind_request()・read_sock()・winbind_open_pipe_sock()・write_sock().

{
        if (winbindd_fd != -1) {
                close(winbindd_fd);
                winbindd_fd = -1;
        }
}

void free_response

(

struct winbindd_response *

response

)

wb_common.c の 40 行で定義されています。

参照先 winbindd_response::data・winbindd_response::extra_data.

参照元 _nss_winbind_endgrent()・_nss_winbind_endpwent()・_nss_winbind_getgrgid_r()・_nss_winbind_getgrnam_r()・_nss_winbind_getpwent_r()・_nss_winbind_getpwnam_r()・_nss_winbind_getpwuid_r()・_nss_winbind_getusersids()・_nss_winbind_gidtosid()・_nss_winbind_hosts_getbyaddr()・_nss_winbind_hosts_getbyname()・_nss_winbind_ipnodes_getbyname()・_nss_winbind_nametosid()・_nss_winbind_setgrent()・_nss_winbind_setpwent()・_nss_winbind_sidtoname()・_nss_winbind_uidtosid()・contact_winbind_auth_crap()・contact_winbind_change_pswd_auth_crap()・do_ccache_ntlm_auth()・read_reply()・wb_aix_authenticate()・wb_aix_chpass()・wb_aix_getgrgid()・wb_aix_getgrnam()・wb_aix_getgrset()・wb_aix_getpwnam()・wb_aix_getpwuid()・wb_aix_lsgroup()・wb_aix_lsuser()・winbind_callback()・winbind_getgrent()・winbindd_get_response().

{
        /* Free any allocated extra_data */

        if (response)
                SAFE_FREE(response->extra_data.data);
}

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