lib/util_sock.c

ソースコードを見る。

データ構造
struct	smb_socket_option
列挙型
enum	SOCK_OPT_TYPES { OPT_BOOL, OPT_INT, OPT_ON }
関数
void	client_setfd (int fd)
static char *	get_socket_addr (int fd)
static int	get_socket_port (int fd)
char *	client_name (void)
char *	client_addr (void)
char *	client_socket_addr (void)
int	client_socket_port (void)
in_addr *	client_inaddr (struct sockaddr *sa)
BOOL	is_a_socket (int fd)
static void	print_socket_options (int s)
void	set_socket_options (int fd, const char *options)
ssize_t	read_udp_socket (int fd, char *buf, size_t len)
Socket routines from HEAD maybe re enable in future static JRA BOOL	timeout_until (struct timeval *timeout, const struct timeval *endtime)
ssize_t	read_data_until (int fd, char *buffer, size_t N, const struct timeval *endtime)
ssize_t	read_socket_with_timeout (int fd, char *buf, size_t mincnt, size_t maxcnt, unsigned int time_out)
ssize_t	read_data (int fd, char *buffer, size_t N)
ssize_t	write_data (int fd, const char *buffer, size_t N)
BOOL	send_keepalive (int client)
static ssize_t	read_smb_length_return_keepalive (int fd, char *inbuf, unsigned int timeout)
ssize_t	read_smb_length (int fd, char *inbuf, unsigned int timeout)
BOOL	receive_smb_raw (int fd, char *buffer, size_t buflen, unsigned int timeout)
BOOL	receive_smb (int fd, char *buffer, size_t buflen, unsigned int timeout)
BOOL	send_smb (int fd, char *buffer)
int	open_socket_in (int type, int port, int dlevel, uint32 socket_addr, BOOL rebind)
int	open_socket_out (int type, struct in_addr *addr, int port, int timeout)
BOOL	open_any_socket_out (struct sockaddr_in *addrs, int num_addrs, int timeout, int *fd_index, int *fd)
int	open_udp_socket (const char *host, int port)
static BOOL	matchname (char *remotehost, struct in_addr addr)
char *	get_peer_name (int fd, BOOL force_lookup)
char *	get_peer_addr (int fd)
int	create_pipe_sock (const char *socket_dir, const char *socket_name, mode_t dir_perms)
変数
static int	client_fd = -1
static char	client_ip_string [16]
in_addr	lastip
int	lastport = 0
int	smb_read_error = 0
static const smb_socket_option	socket_options []

---

列挙型

enum SOCK_OPT_TYPES

列挙型の値:

OPT_BOOL
OPT_INT
OPT_ON

util_sock.c の 131 行で定義されています。

{OPT_BOOL,OPT_INT,OPT_ON};

---

関数

void client_setfd

(

int

fd

)

util_sock.c の 32 行で定義されています。

参照先 client_fd・client_ip_string・get_peer_addr().

参照元 smbd_set_server_fd().

{
        client_fd = fd;
        safe_strcpy(client_ip_string, get_peer_addr(client_fd), sizeof(client_ip_string)-1);
}

static char* get_socket_addr

(

int

fd

)

[static]

util_sock.c の 38 行で定義されています。

参照先 errno・strerror().

参照元 client_socket_addr().

{
        struct sockaddr sa;
        struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa);
        socklen_t length = sizeof(sa);
        static fstring addr_buf;

        fstrcpy(addr_buf,"0.0.0.0");

        if (fd == -1) {
                return addr_buf;
        }
        
        if (getsockname(fd, &sa, &length) < 0) {
                DEBUG(0,("getsockname failed. Error was %s\n", strerror(errno) ));
                return addr_buf;
        }
        
        fstrcpy(addr_buf,(char *)inet_ntoa(sockin->sin_addr));
        
        return addr_buf;
}

static int get_socket_port

(

int

fd

)

[static]

util_sock.c の 61 行で定義されています。

参照先 errno・strerror().

参照元 client_socket_port().

{
        struct sockaddr sa;
        struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa);
        socklen_t length = sizeof(sa);

        if (fd == -1)
                return -1;
        
        if (getsockname(fd, &sa, &length) < 0) {
                DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
                return -1;
        }
        
        return ntohs(sockin->sin_port);
}

char* client_name

(

void

)

util_sock.c の 78 行で定義されています。

参照先 client_fd・get_peer_name().

参照元 alloc_sub_basic()・cups_job_submit()・get_md4pw()・iprint_job_submit()・session_claim()・smb_pam_start().

{
        return get_peer_name(client_fd,False);
}

char* client_addr

(

void

)

util_sock.c の 83 行で定義されています。

参照先 client_fd・get_peer_addr().

参照元 alloc_sub_basic()・claim_connection()・cups_job_submit()・get_md4pw()・iprint_job_submit()・make_connection()・make_connection_snum()・process_smb()・read_target_host()・session_claim()・setup_new_vc_session()・smb_pam_start().

{
        return get_peer_addr(client_fd);
}

char* client_socket_addr

(

void

)

util_sock.c の 88 行で定義されています。

参照先 client_fd・get_socket_addr().

参照元 alloc_sub_basic()・set_local_machine_name().

{
        return get_socket_addr(client_fd);
}

int client_socket_port

(

void

)

util_sock.c の 93 行で定義されています。

参照先 client_fd・get_socket_port().

{
        return get_socket_port(client_fd);
}

struct in_addr* client_inaddr

(

struct sockaddr *

sa

)

util_sock.c の 98 行で定義されています。

参照先 client_fd・errno・strerror().

参照元 session_claim().

{
        struct sockaddr_in *sockin = (struct sockaddr_in *) (sa);
        socklen_t  length = sizeof(*sa);
        
        if (getpeername(client_fd, sa, &length) < 0) {
                DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
                return NULL;
        }
        
        return &sockin->sin_addr;
}

BOOL is_a_socket

(

int

fd

)

util_sock.c の 123 行で定義されています。

参照元 main().

{
        int v;
        socklen_t l;
        l = sizeof(int);
        return(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&v, &l) == 0);
}

static void print_socket_options

(

int

s

)

[static]

util_sock.c の 193 行で定義されています。

参照先 DEBUGLEVEL・smb_socket_option::level・smb_socket_option::name・smb_socket_option::option・socket_options.

参照元 set_socket_options().

{
        int value;
        socklen_t vlen = 4;
        const smb_socket_option *p = &socket_options[0];

        /* wrapped in if statement to prevent streams leak in SCO Openserver 5.0 */
        /* reported on samba-technical  --jerry */
        if ( DEBUGLEVEL >= 5 ) {
        for (; p->name != NULL; p++) {
                if (getsockopt(s, p->level, p->option, (void *)&value, &vlen) == -1) {
                        DEBUG(5,("Could not test socket option %s.\n", p->name));
                } else {
                        DEBUG(5,("socket option %s = %d\n",p->name,value));
                        }
                }
        }
 }

void set_socket_options	(	int	fd,
		const char *	options
	)

util_sock.c の 216 行で定義されています。

参照先 errno・level・name・smb_socket_option::name・next_token()・OPT_BOOL・OPT_INT・OPT_ON・print_socket_options()・socket_options・strchr_m()・strequal()・strerror()・smb_socket_option::value.

参照元 cli_connect()・cli_session_request()・cli_sockopt()・make_subnet()・name_resolve_bcast()・open_sockets()・open_sockets_inetd()・open_sockets_smbd()・reload_services()・wins_lookup_open_socket_in().

{
        fstring tok;

        while (next_token(&options,tok," \t,", sizeof(tok))) {
                int ret=0,i;
                int value = 1;
                char *p;
                BOOL got_value = False;

                if ((p = strchr_m(tok,'='))) {
                        *p = 0;
                        value = atoi(p+1);
                        got_value = True;
                }

                for (i=0;socket_options[i].name;i++)
                        if (strequal(socket_options[i].name,tok))
                                break;

                if (!socket_options[i].name) {
                        DEBUG(0,("Unknown socket option %s\n",tok));
                        continue;
                }

                switch (socket_options[i].opttype) {
                case OPT_BOOL:
                case OPT_INT:
                        ret = setsockopt(fd,socket_options[i].level,
                                                socket_options[i].option,(char *)&value,sizeof(int));
                        break;

                case OPT_ON:
                        if (got_value)
                                DEBUG(0,("syntax error - %s does not take a value\n",tok));

                        {
                                int on = socket_options[i].value;
                                ret = setsockopt(fd,socket_options[i].level,
                                                        socket_options[i].option,(char *)&on,sizeof(int));
                        }
                        break;    
                }
      
                if (ret != 0)
                        DEBUG(0,("Failed to set socket option %s (Error %s)\n",tok, strerror(errno) ));
        }

        print_socket_options(fd);
}

ssize_t read_udp_socket	(	int	fd,
		char *	buf,
		size_t	len
	)

util_sock.c の 271 行で定義されています。

参照先 errno・lastip・lastport・strerror()・sys_recvfrom().

参照元 read_packet().

{
        ssize_t ret;
        struct sockaddr_in sock;
        socklen_t socklen = sizeof(sock);

        memset((char *)&sock,'\0',socklen);
        memset((char *)&lastip,'\0',sizeof(lastip));
        ret = (ssize_t)sys_recvfrom(fd,buf,len,0,(struct sockaddr *)&sock,&socklen);
        if (ret <= 0) {
                /* Don't print a low debug error for a non-blocking socket. */
                if (errno == EAGAIN) {
                        DEBUG(10,("read socket returned EAGAIN. ERRNO=%s\n",strerror(errno)));
                } else {
                        DEBUG(2,("read socket failed. ERRNO=%s\n",strerror(errno)));
                }
                return(0);
        }

        lastip = sock.sin_addr;
        lastport = ntohs(sock.sin_port);

        DEBUG(10,("read_udp_socket: lastip %s lastport %d read: %lu\n",
                        inet_ntoa(lastip), lastport, (unsigned long)ret));

        return(ret);
}

Socket routines from HEAD maybe re enable in future static JRA BOOL timeout_until	(	struct timeval *	timeout,
		const struct timeval *	endtime
	)			[static]

util_sock.c の 307 行で定義されています。

参照先 GetTimeOfDay()・usec_time_diff().

参照元 read_data_until().

{
        struct timeval now;
        SMB_BIG_INT t_dif;

        GetTimeOfDay(&now);

        t_dif = usec_time_diff(endtime, &now);
        if (t_dif <= 0) {
                return False;
        }

        timeout->tv_sec = (t_dif / (SMB_BIG_INT)1000000);
        timeout->tv_usec = (t_dif % (SMB_BIG_INT)1000000);
        return True;
}

ssize_t read_data_until	(	int	fd,
		char *	buffer,
		size_t	N,
		const struct timeval *	endtime
	)

util_sock.c の 329 行で定義されています。

参照先 errno・smb_read_error・strerror()・sys_read()・sys_select_intr()・timeout_until()・total.

{
        ssize_t ret;
        size_t total=0;

        smb_read_error = 0;

        while (total < N) {

                if (endtime != NULL) {
                        fd_set r_fds;
                        struct timeval timeout;
                        int selrtn;

                        if (!timeout_until(&timeout, endtime)) {
                                DEBUG(10,("read_data_until: read timed out\n"));
                                smb_read_error = READ_TIMEOUT;
                                return -1;
                        }

                        FD_ZERO(&r_fds);
                        FD_SET(fd, &r_fds);

                        /* Select but ignore EINTR. */
                        selrtn = sys_select_intr(fd+1, &r_fds, NULL, NULL, &timeout);
                        if (selrtn == -1) {
                                /* something is wrong. Maybe the socket is dead? */
                                DEBUG(0,("read_data_until: select error = %s.\n", strerror(errno) ));
                                smb_read_error = READ_ERROR;
                                return -1;
                        }

                        /* Did we timeout ? */
                        if (selrtn == 0) {
                                DEBUG(10,("read_data_until: select timed out.\n"));
                                smb_read_error = READ_TIMEOUT;
                                return -1;
                        }
                }

                ret = sys_read(fd,buffer + total,N - total);

                if (ret == 0) {
                        DEBUG(10,("read_data_until: read of %d returned 0. Error = %s\n", (int)(N - total), strerror(errno) ));
                        smb_read_error = READ_EOF;
                        return 0;
                }

                if (ret == -1) {
                        if (errno == EAGAIN) {
                                /* Non-blocking socket with no data available. Try select again. */
                                continue;
                        }
                        DEBUG(0,("read_data_until: read failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
                        smb_read_error = READ_ERROR;
                        return -1;
                }
                total += ret;
        }
        return (ssize_t)total;
}

ssize_t read_socket_with_timeout	(	int	fd,
		char *	buf,
		size_t	mincnt,
		size_t	maxcnt,
		unsigned int	time_out
	)

util_sock.c の 399 行で定義されています。

参照先 client_fd・client_ip_string・errno・smb_read_error・strerror()・sys_read()・sys_select_intr().

参照元 expect()・read_smb_length_return_keepalive()・receive_smb_raw().

{
        fd_set fds;
        int selrtn;
        ssize_t readret;
        size_t nread = 0;
        struct timeval timeout;
        
        /* just checking .... */
        if (maxcnt <= 0)
                return(0);
        
        smb_read_error = 0;
        
        /* Blocking read */
        if (time_out == 0) {
                if (mincnt == 0) {
                        mincnt = maxcnt;
                }
                
                while (nread < mincnt) {
                        readret = sys_read(fd, buf + nread, maxcnt - nread);
                        
                        if (readret == 0) {
                                DEBUG(5,("read_socket_with_timeout: blocking read. EOF from client.\n"));
                                smb_read_error = READ_EOF;
                                return -1;
                        }
                        
                        if (readret == -1) {
                                if (fd == client_fd) {
                                        /* Try and give an error message saying what client failed. */
                                        DEBUG(0,("read_socket_with_timeout: client %s read error = %s.\n",
                                                client_ip_string, strerror(errno) ));
                                } else {
                                        DEBUG(0,("read_socket_with_timeout: read error = %s.\n", strerror(errno) ));
                                }
                                smb_read_error = READ_ERROR;
                                return -1;
                        }
                        nread += readret;
                }
                return((ssize_t)nread);
        }
        
        /* Most difficult - timeout read */
        /* If this is ever called on a disk file and 
           mincnt is greater then the filesize then
           system performance will suffer severely as 
           select always returns true on disk files */
        
        /* Set initial timeout */
        timeout.tv_sec = (time_t)(time_out / 1000);
        timeout.tv_usec = (long)(1000 * (time_out % 1000));
        
        for (nread=0; nread < mincnt; ) {      
                FD_ZERO(&fds);
                FD_SET(fd,&fds);
                
                selrtn = sys_select_intr(fd+1,&fds,NULL,NULL,&timeout);
                
                /* Check if error */
                if (selrtn == -1) {
                        /* something is wrong. Maybe the socket is dead? */
                        if (fd == client_fd) {
                                /* Try and give an error message saying what client failed. */
                                DEBUG(0,("read_socket_with_timeout: timeout read for client %s. select error = %s.\n",
                                        client_ip_string, strerror(errno) ));
                        } else {
                                DEBUG(0,("read_socket_with_timeout: timeout read. select error = %s.\n", strerror(errno) ));
                        }
                        smb_read_error = READ_ERROR;
                        return -1;
                }
                
                /* Did we timeout ? */
                if (selrtn == 0) {
                        DEBUG(10,("read_socket_with_timeout: timeout read. select timed out.\n"));
                        smb_read_error = READ_TIMEOUT;
                        return -1;
                }
                
                readret = sys_read(fd, buf+nread, maxcnt-nread);
                
                if (readret == 0) {
                        /* we got EOF on the file descriptor */
                        DEBUG(5,("read_socket_with_timeout: timeout read. EOF from client.\n"));
                        smb_read_error = READ_EOF;
                        return -1;
                }
                
                if (readret == -1) {
                        /* the descriptor is probably dead */
                        if (fd == client_fd) {
                                /* Try and give an error message saying what client failed. */
                                DEBUG(0,("read_socket_with_timeout: timeout read to client %s. read error = %s.\n",
                                        client_ip_string, strerror(errno) ));
                        } else {
                                DEBUG(0,("read_socket_with_timeout: timeout read. read error = %s.\n", strerror(errno) ));
                        }
                        smb_read_error = READ_ERROR;
                        return -1;
                }
                
                nread += readret;
        }
        
        /* Return the number we got */
        return (ssize_t)nread;
}

ssize_t read_data	(	int	fd,
		char *	buffer,
		size_t	N
	)

util_sock.c の 514 行で定義されています。

参照先 client_fd・client_ip_string・errno・smb_read_error・strerror()・sys_read()・total.

参照元 asyncdns_process()・child_read_request()・read_smb_length_return_keepalive()・receive_smb_raw()・reply_writebraw()・run_dns_queue().

{
        ssize_t ret;
        size_t total=0;  
 
        smb_read_error = 0;

        while (total < N) {
                ret = sys_read(fd,buffer + total,N - total);

                if (ret == 0) {
                        DEBUG(10,("read_data: read of %d returned 0. Error = %s\n", (int)(N - total), strerror(errno) ));
                        smb_read_error = READ_EOF;
                        return 0;
                }

                if (ret == -1) {
                        if (fd == client_fd) {
                                /* Try and give an error message saying what client failed. */
                                DEBUG(0,("read_data: read failure for %d bytes to client %s. Error = %s\n",
                                        (int)(N - total), client_ip_string, strerror(errno) ));
                        } else {
                                DEBUG(0,("read_data: read failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
                        }
                        smb_read_error = READ_ERROR;
                        return -1;
                }
                total += ret;
        }
        return (ssize_t)total;
}

ssize_t write_data	(	int	fd,
		const char *	buffer,
		size_t	N
	)

util_sock.c の 550 行で定義されています。

参照先 client_fd・client_ip_string・errno・strerror()・sys_write()・total.

参照元 asyncdns_process()・fake_sendfile()・reply_readbraw()・send_file_readbraw()・send_keepalive()・send_smb()・write_child()・write_data_at_offset()・write_socket().

{
        size_t total=0;
        ssize_t ret;

        while (total < N) {
                ret = sys_write(fd,buffer + total,N - total);

                if (ret == -1) {
                        if (fd == client_fd) {
                                /* Try and give an error message saying what client failed. */
                                DEBUG(0,("write_data: write failure in writing to client %s. Error %s\n",
                                        client_ip_string, strerror(errno) ));
                        } else {
                                DEBUG(0,("write_data: write failure. Error = %s\n", strerror(errno) ));
                        }
                        return -1;
                }

                if (ret == 0) {
                        return total;
                }

                total += ret;
        }
        return (ssize_t)total;
}

BOOL send_keepalive

(

int

client

)

util_sock.c の 582 行で定義されています。

参照先 buf・write_data().

参照元 cli_send_keepalive()・reply_writebraw()・send_server_keepalive()・timeout_processing().

{
        unsigned char buf[4];

        buf[0] = SMBkeepalive;
        buf[1] = buf[2] = buf[3] = 0;

        return(write_data(client,(char *)buf,4) == 4);
}

static ssize_t read_smb_length_return_keepalive	(	int	fd,
		char *	inbuf,
		unsigned int	timeout
	)			[static]

util_sock.c の 601 行で定義されています。

参照先 len・read_data()・read_socket_with_timeout().

参照元 read_smb_length()・receive_smb_raw().

{
        ssize_t len=0;
        int msg_type;
        BOOL ok = False;

        while (!ok) {
                if (timeout > 0)
                        ok = (read_socket_with_timeout(fd,inbuf,4,4,timeout) == 4);
                else 
                        ok = (read_data(fd,inbuf,4) == 4);

                if (!ok)
                        return(-1);

                len = smb_len(inbuf);
                msg_type = CVAL(inbuf,0);

                if (msg_type == SMBkeepalive) 
                        DEBUG(5,("Got keepalive packet\n"));
        }

        DEBUG(10,("got smb length of %lu\n",(unsigned long)len));

        return(len);
}

ssize_t read_smb_length	(	int	fd,
		char *	inbuf,
		unsigned int	timeout
	)

util_sock.c の 635 行で定義されています。

参照先 len・read_smb_length_return_keepalive().

参照元 reply_writebraw().

{
        ssize_t len;

        for(;;) {
                len = read_smb_length_return_keepalive(fd, inbuf, timeout);

                if(len < 0)
                        return len;

                /* Ignore session keepalives. */
                if(CVAL(inbuf,0) != SMBkeepalive)
                        break;
        }

        DEBUG(10,("read_smb_length: got smb length of %lu\n",
                  (unsigned long)len));

        return len;
}

BOOL receive_smb_raw	(	int	fd,
		char *	buffer,
		size_t	buflen,
		unsigned int	timeout
	)

util_sock.c の 663 行で定義されています。

参照先 len・read_data()・read_smb_length_return_keepalive()・read_socket_with_timeout()・smb_read_error.

参照元 client_receive_smb()・receive_smb().

{
        ssize_t len,ret;

        smb_read_error = 0;

        len = read_smb_length_return_keepalive(fd,buffer,timeout);
        if (len < 0) {
                DEBUG(10,("receive_smb_raw: length < 0!\n"));

                /*
                 * Correct fix. smb_read_error may have already been
                 * set. Only set it here if not already set. Global
                 * variables still suck :-). JRA.
                 */

                if (smb_read_error == 0)
                        smb_read_error = READ_ERROR;
                return False;
        }

        if (len > buflen) {
                DEBUG(0,("Invalid packet length! (%lu bytes).\n",(unsigned long)len));

                /*
                 * smb_read_error may have already been
                 * set. Only set it here if not already set. Global
                 * variables still suck :-). JRA.
                 */

                if (smb_read_error == 0)
                        smb_read_error = READ_ERROR;
                return False;
        }

        if(len > 0) {
                if (timeout > 0) {
                        ret = read_socket_with_timeout(fd,buffer+4,len,len,timeout);
                } else {
                        ret = read_data(fd,buffer+4,len);
                }

                if (ret != len) {
                        if (smb_read_error == 0) {
                                smb_read_error = READ_ERROR;
                        }
                        return False;
                }
                
                /* not all of samba3 properly checks for packet-termination of strings. This
                   ensures that we don't run off into empty space. */
                SSVAL(buffer+4,len, 0);
        }

        return True;
}

BOOL receive_smb	(	int	fd,
		char *	buffer,
		size_t	buflen,
		unsigned int	timeout
	)

util_sock.c の 725 行で定義されています。

参照先 receive_smb_raw()・smb_read_error・srv_check_sign_mac().

参照元 filter_child()・readline_callback()・receive_message_or_smb().

{
        if (!receive_smb_raw(fd, buffer, buflen, timeout)) {
                return False;
        }

        /* Check the incoming SMB signature. */
        if (!srv_check_sign_mac(buffer, True)) {
                DEBUG(0, ("receive_smb: SMB Signature verification failed on incoming packet!\n"));
                if (smb_read_error == 0)
                        smb_read_error = READ_BAD_SIG;
                return False;
        };

        return(True);
}

BOOL send_smb	(	int	fd,
		char *	buffer
	)

util_sock.c の 746 行で定義されています。

参照先 errno・len・srv_calculate_sign_mac()・strerror()・write_data().

参照元 blocking_lock_reply_error()・change_notify_reply_packet()・filter_child()・generic_blocking_lock_error()・handle_aio_read_complete()・handle_aio_write_complete()・process_kernel_oplock_break()・process_oplock_async_level2_break_message()・process_oplock_break_message()・process_smb()・reply_echo()・reply_readbmpx()・reply_sesssetup_blob()・reply_writebmpx()・reply_writebraw()・schedule_aio_write_and_X()・send_blocking_reply()・send_nt_replies()・send_trans2_replies()・send_trans_reply().

{
        size_t len;
        size_t nwritten=0;
        ssize_t ret;

        /* Sign the outgoing packet if required. */
        srv_calculate_sign_mac(buffer);

        len = smb_len(buffer) + 4;

        while (nwritten < len) {
                ret = write_data(fd,buffer+nwritten,len - nwritten);
                if (ret <= 0) {
                        DEBUG(0,("Error writing %d bytes to client. %d. (%s)\n",
                                (int)len,(int)ret, strerror(errno) ));
                        return False;
                }
                nwritten += ret;
        }

        return True;
}

int open_socket_in	(	int	type,
		int	port,
		int	dlevel,
		uint32	socket_addr,
		BOOL	rebind
	)

util_sock.c の 774 行で定義されています。

参照先 dbgtext()・errno・strerror().

参照元 make_subnet()・name_resolve_bcast()・name_status_find()・nmbd_running()・open_sockets()・open_sockets_smbd()・resolve_wins()・start_filter().

{
        struct sockaddr_in sock;
        int res;

        memset( (char *)&sock, '\0', sizeof(sock) );

#ifdef HAVE_SOCK_SIN_LEN
        sock.sin_len         = sizeof(sock);
#endif
        sock.sin_port        = htons( port );
        sock.sin_family      = AF_INET;
        sock.sin_addr.s_addr = socket_addr;

        res = socket( AF_INET, type, 0 );
        if( res == -1 ) {
                if( DEBUGLVL(0) ) {
                        dbgtext( "open_socket_in(): socket() call failed: " );
                        dbgtext( "%s\n", strerror( errno ) );
                }
                return -1;
        }

        /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
        {
                int val = rebind ? 1 : 0;
                if( setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)) == -1 ) {
                        if( DEBUGLVL( dlevel ) ) {
                                dbgtext( "open_socket_in(): setsockopt: " );
                                dbgtext( "SO_REUSEADDR = %s ", val?"True":"False" );
                                dbgtext( "on port %d failed ", port );
                                dbgtext( "with error = %s\n", strerror(errno) );
                        }
                }
#ifdef SO_REUSEPORT
                if( setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val)) == -1 ) {
                        if( DEBUGLVL( dlevel ) ) {
                                dbgtext( "open_socket_in(): setsockopt: ");
                                dbgtext( "SO_REUSEPORT = %s ", val?"True":"False" );
                                dbgtext( "on port %d failed ", port );
                                dbgtext( "with error = %s\n", strerror(errno) );
                        }
                }
#endif /* SO_REUSEPORT */
        }

        /* now we've got a socket - we need to bind it */
        if( bind( res, (struct sockaddr *)&sock, sizeof(sock) ) == -1 ) {
                if( DEBUGLVL(dlevel) && (port == SMB_PORT1 || port == SMB_PORT2 || port == NMB_PORT) ) {
                        dbgtext( "bind failed on port %d ", port );
                        dbgtext( "socket_addr = %s.\n", inet_ntoa( sock.sin_addr ) );
                        dbgtext( "Error = %s\n", strerror(errno) );
                }
                close( res ); 
                return( -1 ); 
        }

        DEBUG( 10, ( "bind succeeded on port %d\n", port ) );

        return( res );
 }

int open_socket_out	(	int	type,
		struct in_addr *	addr,
		int	port,
		int	timeout
	)

util_sock.c の 840 行で定義されています。

参照先 errno・set_blocking()・smb_msleep()・strerror().

参照元 cli_connect()・cli_session_request()・do_krb5_kpasswd_request()・filter_child().

{
        struct sockaddr_in sock_out;
        int res,ret;
        int connect_loop = 10;
        int increment = 10;

        /* create a socket to write to */
        res = socket(PF_INET, type, 0);
        if (res == -1) {
                DEBUG(0,("socket error (%s)\n", strerror(errno)));
                return -1;
        }

        if (type != SOCK_STREAM)
                return(res);
  
        memset((char *)&sock_out,'\0',sizeof(sock_out));
        putip((char *)&sock_out.sin_addr,(char *)addr);
  
        sock_out.sin_port = htons( port );
        sock_out.sin_family = PF_INET;

        /* set it non-blocking */
        set_blocking(res,False);

        DEBUG(3,("Connecting to %s at port %d\n",inet_ntoa(*addr),port));
  
        /* and connect it to the destination */
  connect_again:

        ret = connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out));

        /* Some systems return EAGAIN when they mean EINPROGRESS */
        if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
                        errno == EAGAIN) && (connect_loop < timeout) ) {
                smb_msleep(connect_loop);
                timeout -= connect_loop;
                connect_loop += increment;
                if (increment < 250) {
                        /* After 8 rounds we end up at a max of 255 msec */
                        increment *= 1.5;
                }
                goto connect_again;
        }

        if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
                        errno == EAGAIN)) {
                DEBUG(1,("timeout connecting to %s:%d\n",inet_ntoa(*addr),port));
                close(res);
                return -1;
        }

#ifdef EISCONN

        if (ret < 0 && errno == EISCONN) {
                errno = 0;
                ret = 0;
        }
#endif

        if (ret < 0) {
                DEBUG(2,("error connecting to %s:%d (%s)\n",
                                inet_ntoa(*addr),port,strerror(errno)));
                close(res);
                return -1;
        }

        /* set it blocking again */
        set_blocking(res,True);

        return res;
}

BOOL open_any_socket_out	(	struct sockaddr_in *	addrs,
		int	num_addrs,
		int	timeout,
		int *	fd_index,
		int *	fd
	)

util_sock.c の 920 行で定義されています。

参照先 endif・errno・set_blocking()・sockets・sys_select_intr().

参照元 cm_open_connection()・find_new_dc().

{
        int i, resulting_index, res;
        int *sockets;
        BOOL good_connect;

        fd_set r_fds, wr_fds;
        struct timeval tv;
        int maxfd;

        int connect_loop = 10000; /* 10 milliseconds */

        timeout *= 1000;        /* convert to microseconds */

        sockets = SMB_MALLOC_ARRAY(int, num_addrs);

        if (sockets == NULL)
                return False;

        resulting_index = -1;

        for (i=0; i<num_addrs; i++)
                sockets[i] = -1;

        for (i=0; i<num_addrs; i++) {
                sockets[i] = socket(PF_INET, SOCK_STREAM, 0);
                if (sockets[i] < 0)
                        goto done;
                set_blocking(sockets[i], False);
        }

 connect_again:
        good_connect = False;

        for (i=0; i<num_addrs; i++) {

                if (sockets[i] == -1)
                        continue;

                if (connect(sockets[i], (struct sockaddr *)&(addrs[i]),
                            sizeof(*addrs)) == 0) {
                        /* Rather unlikely as we are non-blocking, but it
                         * might actually happen. */
                        resulting_index = i;
                        goto done;
                }

                if (errno == EINPROGRESS || errno == EALREADY ||
#ifdef EISCONN
                        errno == EISCONN ||
#endif
                    errno == EAGAIN || errno == EINTR) {
                        /* These are the error messages that something is
                           progressing. */
                        good_connect = True;
                } else if (errno != 0) {
                        /* There was a direct error */
                        close(sockets[i]);
                        sockets[i] = -1;
                }
        }

        if (!good_connect) {
                /* All of the connect's resulted in real error conditions */
                goto done;
        }

        /* Lets see if any of the connect attempts succeeded */

        maxfd = 0;
        FD_ZERO(&wr_fds);
        FD_ZERO(&r_fds);

        for (i=0; i<num_addrs; i++) {
                if (sockets[i] == -1)
                        continue;
                FD_SET(sockets[i], &wr_fds);
                FD_SET(sockets[i], &r_fds);
                if (sockets[i]>maxfd)
                        maxfd = sockets[i];
        }

        tv.tv_sec = 0;
        tv.tv_usec = connect_loop;

        res = sys_select_intr(maxfd+1, &r_fds, &wr_fds, NULL, &tv);

        if (res < 0)
                goto done;

        if (res == 0)
                goto next_round;

        for (i=0; i<num_addrs; i++) {

                if (sockets[i] == -1)
                        continue;

                /* Stevens, Network Programming says that if there's a
                 * successful connect, the socket is only writable. Upon an
                 * error, it's both readable and writable. */

                if (FD_ISSET(sockets[i], &r_fds) &&
                    FD_ISSET(sockets[i], &wr_fds)) {
                        /* readable and writable, so it's an error */
                        close(sockets[i]);
                        sockets[i] = -1;
                        continue;
                }

                if (!FD_ISSET(sockets[i], &r_fds) &&
                    FD_ISSET(sockets[i], &wr_fds)) {
                        /* Only writable, so it's connected */
                        resulting_index = i;
                        goto done;
                }
        }

 next_round:

        timeout -= connect_loop;
        if (timeout <= 0)
                goto done;
        connect_loop *= 1.5;
        if (connect_loop > timeout)
                connect_loop = timeout;
        goto connect_again;

 done:
        for (i=0; i<num_addrs; i++) {
                if (i == resulting_index)
                        continue;
                if (sockets[i] >= 0)
                        close(sockets[i]);
        }

        if (resulting_index >= 0) {
                *fd_index = resulting_index;
                *fd = sockets[*fd_index];
                set_blocking(*fd, True);
        }

        free(sockets);

        return (resulting_index >= 0);
}

int open_udp_socket	(	const char *	host,
		int	port
	)

util_sock.c の 1071 行で定義されています。

参照先 interpret_addr2()・type.

参照元 ads_cldap_netlogon()・do_krb5_kpasswd_request().

{
        int type = SOCK_DGRAM;
        struct sockaddr_in sock_out;
        int res;
        struct in_addr *addr;

        addr = interpret_addr2(host);

        res = socket(PF_INET, type, 0);
        if (res == -1) {
                return -1;
        }

        memset((char *)&sock_out,'\0',sizeof(sock_out));
        putip((char *)&sock_out.sin_addr,(char *)addr);
        sock_out.sin_port = htons(port);
        sock_out.sin_family = PF_INET;

        if (connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out))) {
                close(res);
                return -1;
        }

        return res;
}

static BOOL matchname	(	char *	remotehost,
		struct in_addr	addr
	)			[static]

util_sock.c の 1104 行で定義されています。

参照先 strequal()・sys_gethostbyname().

参照元 get_peer_name().

{
        struct hostent *hp;
        int     i;
        
        if ((hp = sys_gethostbyname(remotehost)) == 0) {
                DEBUG(0,("sys_gethostbyname(%s): lookup failure.\n", remotehost));
                return False;
        } 

        /*
         * Make sure that gethostbyname() returns the "correct" host name.
         * Unfortunately, gethostbyname("localhost") sometimes yields
         * "localhost.domain". Since the latter host name comes from the
         * local DNS, we just have to trust it (all bets are off if the local
         * DNS is perverted). We always check the address list, though.
         */
        
        if (!strequal(remotehost, hp->h_name)
            && !strequal(remotehost, "localhost")) {
                DEBUG(0,("host name/name mismatch: %s != %s\n",
                         remotehost, hp->h_name));
                return False;
        }
        
        /* Look up the host address in the address list we just got. */
        for (i = 0; hp->h_addr_list[i]; i++) {
                if (memcmp(hp->h_addr_list[i], (char *) & addr, sizeof(addr)) == 0)
                        return True;
        }
        
        /*
         * The host name does not map to the original host address. Perhaps
         * someone has compromised a name server. More likely someone botched
         * it, but that could be dangerous, too.
         */
        
        DEBUG(0,("host name/address mismatch: %s != %s\n",
                 inet_ntoa(addr), hp->h_name));
        return False;
}

char* get_peer_name	(	int	fd,
		BOOL	force_lookup
	)

util_sock.c の 1150 行で定義されています。

参照先 get_peer_addr()・interpret_addr2()・matchname().

参照元 cgi_remote_host()・check_access()・client_name().

{
        static pstring name_buf;
        pstring tmp_name;
        static fstring addr_buf;
        struct hostent *hp;
        struct in_addr addr;
        char *p;

        /* reverse lookups can be *very* expensive, and in many
           situations won't work because many networks don't link dhcp
           with dns. To avoid the delay we avoid the lookup if
           possible */
        if (!lp_hostname_lookups() && (force_lookup == False)) {
                return get_peer_addr(fd);
        }
        
        p = get_peer_addr(fd);

        /* it might be the same as the last one - save some DNS work */
        if (strcmp(p, addr_buf) == 0) 
                return name_buf;

        pstrcpy(name_buf,"UNKNOWN");
        if (fd == -1) 
                return name_buf;

        fstrcpy(addr_buf, p);

        addr = *interpret_addr2(p);
        
        /* Look up the remote host name. */
        if ((hp = gethostbyaddr((char *)&addr.s_addr, sizeof(addr.s_addr), AF_INET)) == 0) {
                DEBUG(1,("Gethostbyaddr failed for %s\n",p));
                pstrcpy(name_buf, p);
        } else {
                pstrcpy(name_buf,(char *)hp->h_name);
                if (!matchname(name_buf, addr)) {
                        DEBUG(0,("Matchname failed on %s %s\n",name_buf,p));
                        pstrcpy(name_buf,"UNKNOWN");
                }
        }

        /* can't pass the same source and dest strings in when you 
           use --enable-developer or the clobber_region() call will 
           get you */
        
        pstrcpy( tmp_name, name_buf );
        alpha_strcpy(name_buf, tmp_name, "_-.", sizeof(name_buf));
        if (strstr(name_buf,"..")) {
                pstrcpy(name_buf, "UNKNOWN");
        }

        return name_buf;
}

char* get_peer_addr

(

int

fd

)

util_sock.c の 1210 行で定義されています。

参照先 errno・strerror().

参照元 cgi_remote_addr()・check_access()・client_addr()・client_setfd()・get_peer_name()・open_sockets_smbd().

{
        struct sockaddr sa;
        struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa);
        socklen_t length = sizeof(sa);
        static fstring addr_buf;

        fstrcpy(addr_buf,"0.0.0.0");

        if (fd == -1) {
                return addr_buf;
        }
        
        if (getpeername(fd, &sa, &length) < 0) {
                DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
                return addr_buf;
        }
        
        fstrcpy(addr_buf,(char *)inet_ntoa(sockin->sin_addr));
        
        return addr_buf;
}

int create_pipe_sock	(	const char *	socket_dir,
		const char *	socket_name,
		mode_t	dir_perms
	)

util_sock.c の 1241 行で定義されています。

参照先 errno・pstr_sprintf()・sec_initial_uid()・strerror().

参照元 open_winbindd_priv_socket()・open_winbindd_socket().

{
#ifdef HAVE_UNIXSOCKET
        struct sockaddr_un sunaddr;
        struct stat st;
        int sock;
        mode_t old_umask;
        pstring path;
        
        old_umask = umask(0);
        
        /* Create the socket directory or reuse the existing one */
        
        if (lstat(socket_dir, &st) == -1) {
                if (errno == ENOENT) {
                        /* Create directory */
                        if (mkdir(socket_dir, dir_perms) == -1) {
                                DEBUG(0, ("error creating socket directory "
                                        "%s: %s\n", socket_dir, 
                                        strerror(errno)));
                                goto out_umask;
                        }
                } else {
                        DEBUG(0, ("lstat failed on socket directory %s: %s\n",
                                socket_dir, strerror(errno)));
                        goto out_umask;
                }
        } else {
                /* Check ownership and permission on existing directory */
                if (!S_ISDIR(st.st_mode)) {
                        DEBUG(0, ("socket directory %s isn't a directory\n",
                                socket_dir));
                        goto out_umask;
                }
                if ((st.st_uid != sec_initial_uid()) || 
                                ((st.st_mode & 0777) != dir_perms)) {
                        DEBUG(0, ("invalid permissions on socket directory "
                                "%s\n", socket_dir));
                        goto out_umask;
                }
        }
        
        /* Create the socket file */
        
        sock = socket(AF_UNIX, SOCK_STREAM, 0);
        
        if (sock == -1) {
                perror("socket");
                goto out_umask;
        }
        
        pstr_sprintf(path, "%s/%s", socket_dir, socket_name);
        
        unlink(path);
        memset(&sunaddr, 0, sizeof(sunaddr));
        sunaddr.sun_family = AF_UNIX;
        safe_strcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path)-1);
        
        if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
                DEBUG(0, ("bind failed on pipe socket %s: %s\n", path,
                        strerror(errno)));
                goto out_close;
        }
        
        if (listen(sock, 5) == -1) {
                DEBUG(0, ("listen failed on pipe socket %s: %s\n", path,
                        strerror(errno)));
                goto out_close;
        }
        
        umask(old_umask);
        return sock;

out_close:
        close(sock);

out_umask:
        umask(old_umask);
        return -1;

#else
        DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
        return -1;
#endif /* HAVE_UNIXSOCKET */
}

---

変数

int client_fd = -1 [static]

util_sock.c の 28 行で定義されています。

参照元 client_addr()・client_inaddr()・client_name()・client_setfd()・client_socket_addr()・client_socket_port()・read_data()・read_socket_with_timeout()・write_data().

char client_ip_string[16] [static]

util_sock.c の 30 行で定義されています。

参照元 client_setfd()・read_data()・read_socket_with_timeout()・write_data().

struct in_addr lastip

util_sock.c の 112 行で定義されています。

参照元 parse_packet()・read_udp_socket().

int lastport = 0

util_sock.c の 115 行で定義されています。

参照元 parse_packet()・read_udp_socket().

int smb_read_error = 0

util_sock.c の 117 行で定義されています。

参照元 cli_receive_smb()・irix_oplock_receive_message()・read_data()・read_data_until()・read_socket_with_timeout()・receive_message_or_smb()・receive_smb()・receive_smb_raw()・timeout_processing().

const smb_socket_option socket_options[] [static]

util_sock.c の 141 行で定義されています。

参照元 print_socket_options()・set_socket_options().

---