/src/samba/source4/lib/socket/socket.c

Source
/* 
   Unix SMB/CIFS implementation.
   Socket functions
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) Tim Potter      2000-2001
   Copyright (C) Stefan Metzmacher 2004
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "lib/socket/socket.h"
#include "system/filesys.h"
#include "system/network.h"
#include "param/param.h"
#include "../lib/tsocket/tsocket.h"
#include "lib/util/util_net.h"

/*
  auto-close sockets on free
*/
static int socket_destructor(struct socket_context *sock)
{
  if (sock->ops->fn_close && 
      !(sock->flags & SOCKET_FLAG_NOCLOSE)) {
    sock->ops->fn_close(sock);
  }
  return 0;
}

_PUBLIC_ void socket_tevent_fd_close_fn(struct tevent_context *ev,
          struct tevent_fd *fde,
          int fd,
          void *private_data)
{
  /* this might be the socket_wrapper swrap_close() */
  close(fd);
}

_PUBLIC_ NTSTATUS socket_create_with_ops(TALLOC_CTX *mem_ctx, const struct socket_ops *ops,
           struct socket_context **new_sock, 
           enum socket_type type, uint32_t flags)
{
  NTSTATUS status;

  (*new_sock) = talloc(mem_ctx, struct socket_context);
  if (!(*new_sock)) {
    return NT_STATUS_NO_MEMORY;
  }

  (*new_sock)->type = type;
  (*new_sock)->state = SOCKET_STATE_UNDEFINED;
  (*new_sock)->flags = flags;

  (*new_sock)->fd = -1;

  (*new_sock)->private_data = NULL;
  (*new_sock)->ops = ops;
  (*new_sock)->backend_name = NULL;

  status = (*new_sock)->ops->fn_init((*new_sock));
  if (!NT_STATUS_IS_OK(status)) {
    talloc_free(*new_sock);
    return status;
  }

  /* by enabling "testnonblock" mode, all socket receive and
     send calls on non-blocking sockets will randomly recv/send
     less data than requested */

  if (type == SOCKET_TYPE_STREAM &&
    getenv("SOCKET_TESTNONBLOCK") != NULL) {
    (*new_sock)->flags |= SOCKET_FLAG_TESTNONBLOCK;
  }

  /* we don't do a connect() on dgram sockets, so need to set
     non-blocking at socket create time */
  if (type == SOCKET_TYPE_DGRAM) {
    set_blocking(socket_get_fd(*new_sock), false);
  }

  talloc_set_destructor(*new_sock, socket_destructor);

  return NT_STATUS_OK;
}

_PUBLIC_ NTSTATUS socket_create(TALLOC_CTX *mem_ctx,
        const char *name, enum socket_type type,
              struct socket_context **new_sock, uint32_t flags)
{
  const struct socket_ops *ops;

  ops = socket_getops_byname(name, type);
  if (!ops) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  return socket_create_with_ops(mem_ctx, ops, new_sock, type, flags);
}

_PUBLIC_ NTSTATUS socket_connect(struct socket_context *sock,
         const struct socket_address *my_address, 
         const struct socket_address *server_address,
         uint32_t flags)
{
  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (sock->state != SOCKET_STATE_UNDEFINED) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (!sock->ops->fn_connect) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }

  return sock->ops->fn_connect(sock, my_address, server_address, flags);
}

_PUBLIC_ NTSTATUS socket_connect_complete(struct socket_context *sock, uint32_t flags)
{
  if (!sock->ops->fn_connect_complete) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }
  return sock->ops->fn_connect_complete(sock, flags);
}

_PUBLIC_ NTSTATUS socket_listen(struct socket_context *sock, 
              const struct socket_address *my_address, 
              int queue_size, uint32_t flags)
{
  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (sock->state != SOCKET_STATE_UNDEFINED) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (!sock->ops->fn_listen) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }

  return sock->ops->fn_listen(sock, my_address, queue_size, flags);
}

_PUBLIC_ NTSTATUS socket_accept(struct socket_context *sock, struct socket_context **new_sock)
{
  NTSTATUS status;

  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (sock->type != SOCKET_TYPE_STREAM) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (sock->state != SOCKET_STATE_SERVER_LISTEN) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (!sock->ops->fn_accept) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }

  status = sock->ops->fn_accept(sock, new_sock);

  if (NT_STATUS_IS_OK(status)) {
    talloc_set_destructor(*new_sock, socket_destructor);
    (*new_sock)->flags = 0;
  }

  return status;
}

_PUBLIC_ NTSTATUS socket_recv(struct socket_context *sock, void *buf, 
            size_t wantlen, size_t *nread)
{
  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (sock->state != SOCKET_STATE_CLIENT_CONNECTED &&
      sock->state != SOCKET_STATE_SERVER_CONNECTED &&
      sock->type  != SOCKET_TYPE_DGRAM) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (!sock->ops->fn_recv) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }

  if ((sock->flags & SOCKET_FLAG_TESTNONBLOCK) 
      && wantlen > 1) {

    if (random() % 10 == 0) {
      *nread = 0;
      return STATUS_MORE_ENTRIES;
    }
    return sock->ops->fn_recv(sock, buf, 1+(random() % wantlen), nread);
  }
  return sock->ops->fn_recv(sock, buf, wantlen, nread);
}

_PUBLIC_ NTSTATUS socket_recvfrom(struct socket_context *sock, void *buf, 
          size_t wantlen, size_t *nread, 
          TALLOC_CTX *mem_ctx, struct socket_address **src_addr)
{
  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (sock->type != SOCKET_TYPE_DGRAM) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (!sock->ops->fn_recvfrom) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }

  return sock->ops->fn_recvfrom(sock, buf, wantlen, nread, 
              mem_ctx, src_addr);
}

_PUBLIC_ NTSTATUS socket_send(struct socket_context *sock, 
            const DATA_BLOB *blob, size_t *sendlen)
{
  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (sock->state != SOCKET_STATE_CLIENT_CONNECTED &&
      sock->state != SOCKET_STATE_SERVER_CONNECTED) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (!sock->ops->fn_send) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }
  
  if ((sock->flags & SOCKET_FLAG_TESTNONBLOCK)
      && blob->length > 1) {
    DATA_BLOB blob2 = *blob;
    if (random() % 10 == 0) {
      *sendlen = 0;
      return STATUS_MORE_ENTRIES;
    }
    /* The random size sends are incompatible with TLS and SASL
     * sockets, which require re-sends to be consistent */
    if (!(sock->flags & SOCKET_FLAG_ENCRYPT)) {
      blob2.length = 1+(random() % blob2.length);
    } else {
      /* This is particularly stressful on buggy
       * LDAP clients, that don't expect on LDAP
       * packet in many SASL packets */
      blob2.length = 1 + blob2.length/2;
    }
    return sock->ops->fn_send(sock, &blob2, sendlen);
  }
  return sock->ops->fn_send(sock, blob, sendlen);
}


_PUBLIC_ NTSTATUS socket_sendto(struct socket_context *sock, 
              const DATA_BLOB *blob, size_t *sendlen, 
              const struct socket_address *dest_addr)
{
  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (sock->type != SOCKET_TYPE_DGRAM) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (sock->state == SOCKET_STATE_CLIENT_CONNECTED ||
      sock->state == SOCKET_STATE_SERVER_CONNECTED) {
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (!sock->ops->fn_sendto) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }

  return sock->ops->fn_sendto(sock, blob, sendlen, dest_addr);
}


/*
  ask for the number of bytes in a pending incoming packet
*/
_PUBLIC_ NTSTATUS socket_pending(struct socket_context *sock, size_t *npending)
{
  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (!sock->ops->fn_pending) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }
  return sock->ops->fn_pending(sock, npending);
}


_PUBLIC_ NTSTATUS socket_set_option(struct socket_context *sock, const char *option, const char *val)
{
  if (sock == NULL) {
    return NT_STATUS_CONNECTION_DISCONNECTED;
  }
  if (!sock->ops->fn_set_option) {
    return NT_STATUS_NOT_IMPLEMENTED;
  }

  return sock->ops->fn_set_option(sock, option, val);
}

_PUBLIC_ char *socket_get_peer_name(struct socket_context *sock, TALLOC_CTX *mem_ctx)
{
  if (!sock->ops->fn_get_peer_name) {
    return NULL;
  }

  return sock->ops->fn_get_peer_name(sock, mem_ctx);
}

_PUBLIC_ struct socket_address *socket_get_peer_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
{
  if (!sock->ops->fn_get_peer_addr) {
    return NULL;
  }

  return sock->ops->fn_get_peer_addr(sock, mem_ctx);
}

_PUBLIC_ struct socket_address *socket_get_my_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
{
  if (!sock->ops->fn_get_my_addr) {
    return NULL;
  }

  return sock->ops->fn_get_my_addr(sock, mem_ctx);
}

_PUBLIC_ struct tsocket_address *socket_address_to_tsocket_address(TALLOC_CTX *mem_ctx,
                   const struct socket_address *a)
{
  struct tsocket_address *r;
  int ret;

  if (!a) {
    return NULL;
  }
  if (a->sockaddr) {
    ret = tsocket_address_bsd_from_sockaddr(mem_ctx,
              a->sockaddr,
              a->sockaddrlen,
              &r);
  } else {
    ret = tsocket_address_inet_from_strings(mem_ctx,
              a->family,
              a->addr,
              a->port,
              &r);
  }

  if (ret != 0) {
    return NULL;
  }

  return r;
}

_PUBLIC_ void socket_address_set_port(struct socket_address *a,
              uint16_t port)
{
  if (a->sockaddr) {
    set_sockaddr_port(a->sockaddr, port);
  } else {
    a->port = port;
  }

}

_PUBLIC_ struct socket_address *tsocket_address_to_socket_address(TALLOC_CTX *mem_ctx,
                  const struct tsocket_address *a)
{
  ssize_t ret;
  struct sockaddr_storage ss;
  size_t sslen = sizeof(ss);

  ret = tsocket_address_bsd_sockaddr(a, (struct sockaddr *)(void *)&ss, sslen);
  if (ret < 0) {
    return NULL;
  }

  return socket_address_from_sockaddr(mem_ctx, (struct sockaddr *)(void *)&ss, ret);
}

_PUBLIC_ struct tsocket_address *socket_get_remote_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
{
  struct socket_address *a;
  struct tsocket_address *r;

  a = socket_get_peer_addr(sock, mem_ctx);
  if (a == NULL) {
    return NULL;
  }

  r = socket_address_to_tsocket_address(mem_ctx, a);
  talloc_free(a);
  return r;
}

_PUBLIC_ struct tsocket_address *socket_get_local_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
{
  struct socket_address *a;
  struct tsocket_address *r;

  a = socket_get_my_addr(sock, mem_ctx);
  if (a == NULL) {
    return NULL;
  }

  r = socket_address_to_tsocket_address(mem_ctx, a);
  talloc_free(a);
  return r;
}

_PUBLIC_ int socket_get_fd(struct socket_context *sock)
{
  if (!sock->ops->fn_get_fd) {
    return -1;
  }

  return sock->ops->fn_get_fd(sock);
}

/*
  call dup() on a socket, and close the old fd. This is used to change
  the fd to the lowest available number, to make select() more
  efficient (select speed depends on the maximum fd number passed to
  it)
*/
_PUBLIC_ NTSTATUS socket_dup(struct socket_context *sock)
{
  int fd;
  if (sock->fd == -1) {
    return NT_STATUS_INVALID_HANDLE;
  }
  fd = dup(sock->fd);
  if (fd == -1) {
    return map_nt_error_from_unix_common(errno);
  }
  close(sock->fd);
  sock->fd = fd;
  return NT_STATUS_OK;
  
}

/* Create a new socket_address.  The type must match the socket type.
 * The host parameter may be an IP or a hostname 
 */

_PUBLIC_ struct socket_address *socket_address_from_strings(TALLOC_CTX *mem_ctx,
                  const char *family,
                  const char *host,
                  int port)
{
  struct socket_address *addr = talloc(mem_ctx, struct socket_address);
  if (!addr) {
    return NULL;
  }

  if (strcmp(family, "ip") == 0 && is_ipaddress_v6(host)) {
    /* leaving as "ip" would force IPv4 */
    family = "ipv6";
  }

  addr->family = family;
  addr->addr = talloc_strdup(addr, host);
  if (!addr->addr) {
    talloc_free(addr);
    return NULL;
  }
  addr->port = port;
  addr->sockaddr = NULL;
  addr->sockaddrlen = 0;

  return addr;
}

/* Create a new socket_address.  Copy the struct sockaddr into the new
 * structure.  Used for hooks in the kerberos libraries, where they
 * supply only a struct sockaddr */

_PUBLIC_ struct socket_address *socket_address_from_sockaddr(TALLOC_CTX *mem_ctx, 
                   struct sockaddr *sockaddr, 
                   size_t sockaddrlen)
{
  struct socket_address *addr = talloc(mem_ctx, struct socket_address);
  if (!addr) {
    return NULL;
  }
  switch (sockaddr->sa_family) {
  case AF_INET:
    addr->family = "ipv4";
    break;
#ifdef HAVE_IPV6
  case AF_INET6:
    addr->family = "ipv6";
    break;
#endif
  case AF_UNIX:
    addr->family = "unix";
    break;
  }
  addr->addr = NULL;
  addr->port = 0;
  addr->sockaddr = (struct sockaddr *)talloc_memdup(addr, sockaddr, sockaddrlen);
  if (!addr->sockaddr) {
    talloc_free(addr);
    return NULL;
  }
  addr->sockaddrlen = sockaddrlen;
  return addr;
}


/*
   Create a new socket_address from sockaddr_storage
 */
_PUBLIC_ struct socket_address *socket_address_from_sockaddr_storage(TALLOC_CTX *mem_ctx,
                     const struct sockaddr_storage *sockaddr,
  uint16_t port)
{
  struct socket_address *addr = talloc_zero(mem_ctx, struct socket_address);
  char addr_str[INET6_ADDRSTRLEN+1];
  const char *str;

  if (!addr) {
    return NULL;
  }
  addr->port = port;
  switch (sockaddr->ss_family) {
  case AF_INET:
    addr->family = "ipv4";
    break;
#ifdef HAVE_IPV6
  case AF_INET6:
    addr->family = "ipv6";
    break;
#endif
  default:
    talloc_free(addr);
    return NULL;
  }

  str = print_sockaddr(addr_str, sizeof(addr_str), sockaddr);
  if (str == NULL) {
    talloc_free(addr);
    return NULL;
  }
  addr->addr = talloc_strdup(addr, str);
  if (addr->addr == NULL) {
    talloc_free(addr);
    return NULL;
  }

  return addr;
}

/* Copy a socket_address structure */
struct socket_address *socket_address_copy(TALLOC_CTX *mem_ctx,
             const struct socket_address *oaddr)
{
  struct socket_address *addr = talloc_zero(mem_ctx, struct socket_address);
  if (!addr) {
    return NULL;
  }
  addr->family  = oaddr->family;
  if (oaddr->addr) {
    addr->addr  = talloc_strdup(addr, oaddr->addr);
    if (!addr->addr) {
      goto nomem;
    }
  }
  addr->port  = oaddr->port;
  if (oaddr->sockaddr) {
    addr->sockaddr = (struct sockaddr *)talloc_memdup(addr,
                  oaddr->sockaddr,
                  oaddr->sockaddrlen);
    if (!addr->sockaddr) {
      goto nomem;
    }
    addr->sockaddrlen = oaddr->sockaddrlen;
  }

  return addr;

nomem:
  talloc_free(addr);
  return NULL;
}

_PUBLIC_ const struct socket_ops *socket_getops_byname(const char *family, enum socket_type type)
{
  extern const struct socket_ops *socket_ipv4_ops(enum socket_type);
  extern const struct socket_ops *socket_ipv6_ops(enum socket_type);
  extern const struct socket_ops *socket_unixdom_ops(enum socket_type);

  if (strcmp("ip", family) == 0 || 
      strcmp("ipv4", family) == 0) {
    return socket_ipv4_ops(type);
  }

#ifdef HAVE_IPV6
  if (strcmp("ipv6", family) == 0) {
    return socket_ipv6_ops(type);
  }
#endif

  if (strcmp("unix", family) == 0) {
    return socket_unixdom_ops(type);
  }

  return NULL;
}

/*
  set some flags on a socket 
 */
void socket_set_flags(struct socket_context *sock, unsigned flags)
{
  sock->flags |= flags;
}

Coverage Report

Created: 2026-06-07 07:07

Line	Count	Source
1		/*
2		Unix SMB/CIFS implementation.
3		Socket functions
4		Copyright (C) Andrew Tridgell 1992-1998
5		Copyright (C) Tim Potter 2000-2001
6		Copyright (C) Stefan Metzmacher 2004
7
8		This program is free software; you can redistribute it and/or modify
9		it under the terms of the GNU General Public License as published by
10		the Free Software Foundation; either version 3 of the License, or
11		(at your option) any later version.
12
13		This program is distributed in the hope that it will be useful,
14		but WITHOUT ANY WARRANTY; without even the implied warranty of
15		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16		GNU General Public License for more details.
17
18		You should have received a copy of the GNU General Public License
19		along with this program. If not, see <http://www.gnu.org/licenses/>.
20		*/
21
22		#include "includes.h"
23		#include "lib/socket/socket.h"
24		#include "system/filesys.h"
25		#include "system/network.h"
26		#include "param/param.h"
27		#include "../lib/tsocket/tsocket.h"
28		#include "lib/util/util_net.h"
29
30		/*
31		auto-close sockets on free
32		*/
33		static int socket_destructor(struct socket_context *sock)
34	0	{
35	0	if (sock->ops->fn_close &&
36	0	!(sock->flags & SOCKET_FLAG_NOCLOSE)) {
37	0	sock->ops->fn_close(sock);
38	0	}
39	0	return 0;
40	0	}
41
42		_PUBLIC_ void socket_tevent_fd_close_fn(struct tevent_context *ev,
43		struct tevent_fd *fde,
44		int fd,
45		void *private_data)
46	0	{
47		/* this might be the socket_wrapper swrap_close() */
48	0	close(fd);
49	0	}
50
51		_PUBLIC_ NTSTATUS socket_create_with_ops(TALLOC_CTX mem_ctx, const struct socket_ops ops,
52		struct socket_context **new_sock,
53		enum socket_type type, uint32_t flags)
54	0	{
55	0	NTSTATUS status;
56
57	0	(*new_sock) = talloc(mem_ctx, struct socket_context);
58	0	if (!(*new_sock)) {
59	0	return NT_STATUS_NO_MEMORY;
60	0	}
61
62	0	(*new_sock)->type = type;
63	0	(*new_sock)->state = SOCKET_STATE_UNDEFINED;
64	0	(*new_sock)->flags = flags;
65
66	0	(*new_sock)->fd = -1;
67
68	0	(*new_sock)->private_data = NULL;
69	0	(*new_sock)->ops = ops;
70	0	(*new_sock)->backend_name = NULL;
71
72	0	status = (new_sock)->ops->fn_init((new_sock));
73	0	if (!NT_STATUS_IS_OK(status)) {
74	0	talloc_free(*new_sock);
75	0	return status;
76	0	}
77
78		/* by enabling "testnonblock" mode, all socket receive and
79		send calls on non-blocking sockets will randomly recv/send
80		less data than requested */
81
82	0	if (type == SOCKET_TYPE_STREAM &&
83	0	getenv("SOCKET_TESTNONBLOCK") != NULL) {
84	0	(*new_sock)->flags \|= SOCKET_FLAG_TESTNONBLOCK;
85	0	}
86
87		/* we don't do a connect() on dgram sockets, so need to set
88		non-blocking at socket create time */
89	0	if (type == SOCKET_TYPE_DGRAM) {
90	0	set_blocking(socket_get_fd(*new_sock), false);
91	0	}
92
93	0	talloc_set_destructor(*new_sock, socket_destructor);
94
95	0	return NT_STATUS_OK;
96	0	}
97
98		_PUBLIC_ NTSTATUS socket_create(TALLOC_CTX *mem_ctx,
99		const char *name, enum socket_type type,
100		struct socket_context **new_sock, uint32_t flags)
101	0	{
102	0	const struct socket_ops *ops;
103
104	0	ops = socket_getops_byname(name, type);
105	0	if (!ops) {
106	0	return NT_STATUS_INVALID_PARAMETER;
107	0	}
108
109	0	return socket_create_with_ops(mem_ctx, ops, new_sock, type, flags);
110	0	}
111
112		_PUBLIC_ NTSTATUS socket_connect(struct socket_context *sock,
113		const struct socket_address *my_address,
114		const struct socket_address *server_address,
115		uint32_t flags)
116	0	{
117	0	if (sock == NULL) {
118	0	return NT_STATUS_CONNECTION_DISCONNECTED;
119	0	}
120	0	if (sock->state != SOCKET_STATE_UNDEFINED) {
121	0	return NT_STATUS_INVALID_PARAMETER;
122	0	}
123
124	0	if (!sock->ops->fn_connect) {
125	0	return NT_STATUS_NOT_IMPLEMENTED;
126	0	}
127
128	0	return sock->ops->fn_connect(sock, my_address, server_address, flags);
129	0	}
130
131		_PUBLIC_ NTSTATUS socket_connect_complete(struct socket_context *sock, uint32_t flags)
132	0	{
133	0	if (!sock->ops->fn_connect_complete) {
134	0	return NT_STATUS_NOT_IMPLEMENTED;
135	0	}
136	0	return sock->ops->fn_connect_complete(sock, flags);
137	0	}
138
139		_PUBLIC_ NTSTATUS socket_listen(struct socket_context *sock,
140		const struct socket_address *my_address,
141		int queue_size, uint32_t flags)
142	0	{
143	0	if (sock == NULL) {
144	0	return NT_STATUS_CONNECTION_DISCONNECTED;
145	0	}
146	0	if (sock->state != SOCKET_STATE_UNDEFINED) {
147	0	return NT_STATUS_INVALID_PARAMETER;
148	0	}
149
150	0	if (!sock->ops->fn_listen) {
151	0	return NT_STATUS_NOT_IMPLEMENTED;
152	0	}
153
154	0	return sock->ops->fn_listen(sock, my_address, queue_size, flags);
155	0	}
156
157		_PUBLIC_ NTSTATUS socket_accept(struct socket_context sock, struct socket_context *new_sock)
158	0	{
159	0	NTSTATUS status;
160
161	0	if (sock == NULL) {
162	0	return NT_STATUS_CONNECTION_DISCONNECTED;
163	0	}
164	0	if (sock->type != SOCKET_TYPE_STREAM) {
165	0	return NT_STATUS_INVALID_PARAMETER;
166	0	}
167
168	0	if (sock->state != SOCKET_STATE_SERVER_LISTEN) {
169	0	return NT_STATUS_INVALID_PARAMETER;
170	0	}
171
172	0	if (!sock->ops->fn_accept) {
173	0	return NT_STATUS_NOT_IMPLEMENTED;
174	0	}
175
176	0	status = sock->ops->fn_accept(sock, new_sock);
177
178	0	if (NT_STATUS_IS_OK(status)) {
179	0	talloc_set_destructor(*new_sock, socket_destructor);
180	0	(*new_sock)->flags = 0;
181	0	}
182
183	0	return status;
184	0	}
185
186		_PUBLIC_ NTSTATUS socket_recv(struct socket_context sock, void buf,
187		size_t wantlen, size_t *nread)
188	0	{
189	0	if (sock == NULL) {
190	0	return NT_STATUS_CONNECTION_DISCONNECTED;
191	0	}
192	0	if (sock->state != SOCKET_STATE_CLIENT_CONNECTED &&
193	0	sock->state != SOCKET_STATE_SERVER_CONNECTED &&
194	0	sock->type != SOCKET_TYPE_DGRAM) {
195	0	return NT_STATUS_INVALID_PARAMETER;
196	0	}
197
198	0	if (!sock->ops->fn_recv) {
199	0	return NT_STATUS_NOT_IMPLEMENTED;
200	0	}
201
202	0	if ((sock->flags & SOCKET_FLAG_TESTNONBLOCK)
203	0	&& wantlen > 1) {
204
205	0	if (random() % 10 == 0) {
206	0	*nread = 0;
207	0	return STATUS_MORE_ENTRIES;
208	0	}
209	0	return sock->ops->fn_recv(sock, buf, 1+(random() % wantlen), nread);
210	0	}
211	0	return sock->ops->fn_recv(sock, buf, wantlen, nread);
212	0	}
213
214		_PUBLIC_ NTSTATUS socket_recvfrom(struct socket_context sock, void buf,
215		size_t wantlen, size_t *nread,
216		TALLOC_CTX mem_ctx, struct socket_address *src_addr)
217	0	{
218	0	if (sock == NULL) {
219	0	return NT_STATUS_CONNECTION_DISCONNECTED;
220	0	}
221	0	if (sock->type != SOCKET_TYPE_DGRAM) {
222	0	return NT_STATUS_INVALID_PARAMETER;
223	0	}
224
225	0	if (!sock->ops->fn_recvfrom) {
226	0	return NT_STATUS_NOT_IMPLEMENTED;
227	0	}
228
229	0	return sock->ops->fn_recvfrom(sock, buf, wantlen, nread,
230	0	mem_ctx, src_addr);
231	0	}
232
233		_PUBLIC_ NTSTATUS socket_send(struct socket_context *sock,
234		const DATA_BLOB blob, size_t sendlen)
235	0	{
236	0	if (sock == NULL) {
237	0	return NT_STATUS_CONNECTION_DISCONNECTED;
238	0	}
239	0	if (sock->state != SOCKET_STATE_CLIENT_CONNECTED &&
240	0	sock->state != SOCKET_STATE_SERVER_CONNECTED) {
241	0	return NT_STATUS_INVALID_PARAMETER;
242	0	}
243
244	0	if (!sock->ops->fn_send) {
245	0	return NT_STATUS_NOT_IMPLEMENTED;
246	0	}
247
248	0	if ((sock->flags & SOCKET_FLAG_TESTNONBLOCK)
249	0	&& blob->length > 1) {
250	0	DATA_BLOB blob2 = *blob;
251	0	if (random() % 10 == 0) {
252	0	*sendlen = 0;
253	0	return STATUS_MORE_ENTRIES;
254	0	}
255		/* The random size sends are incompatible with TLS and SASL
256		* sockets, which require re-sends to be consistent */
257	0	if (!(sock->flags & SOCKET_FLAG_ENCRYPT)) {
258	0	blob2.length = 1+(random() % blob2.length);
259	0	} else {
260		/* This is particularly stressful on buggy
261		* LDAP clients, that don't expect on LDAP
262		* packet in many SASL packets */
263	0	blob2.length = 1 + blob2.length/2;
264	0	}
265	0	return sock->ops->fn_send(sock, &blob2, sendlen);
266	0	}
267	0	return sock->ops->fn_send(sock, blob, sendlen);
268	0	}
269
270
271		_PUBLIC_ NTSTATUS socket_sendto(struct socket_context *sock,
272		const DATA_BLOB blob, size_t sendlen,
273		const struct socket_address *dest_addr)
274	0	{
275	0	if (sock == NULL) {
276	0	return NT_STATUS_CONNECTION_DISCONNECTED;
277	0	}
278	0	if (sock->type != SOCKET_TYPE_DGRAM) {
279	0	return NT_STATUS_INVALID_PARAMETER;
280	0	}
281
282	0	if (sock->state == SOCKET_STATE_CLIENT_CONNECTED \|\|
283	0	sock->state == SOCKET_STATE_SERVER_CONNECTED) {
284	0	return NT_STATUS_INVALID_PARAMETER;
285	0	}
286
287	0	if (!sock->ops->fn_sendto) {
288	0	return NT_STATUS_NOT_IMPLEMENTED;
289	0	}
290
291	0	return sock->ops->fn_sendto(sock, blob, sendlen, dest_addr);
292	0	}
293
294
295		/*
296		ask for the number of bytes in a pending incoming packet
297		*/
298		_PUBLIC_ NTSTATUS socket_pending(struct socket_context sock, size_t npending)
299	0	{
300	0	if (sock == NULL) {
301	0	return NT_STATUS_CONNECTION_DISCONNECTED;
302	0	}
303	0	if (!sock->ops->fn_pending) {
304	0	return NT_STATUS_NOT_IMPLEMENTED;
305	0	}
306	0	return sock->ops->fn_pending(sock, npending);
307	0	}
308
309
310		_PUBLIC_ NTSTATUS socket_set_option(struct socket_context sock, const char option, const char *val)
311	0	{
312	0	if (sock == NULL) {
313	0	return NT_STATUS_CONNECTION_DISCONNECTED;
314	0	}
315	0	if (!sock->ops->fn_set_option) {
316	0	return NT_STATUS_NOT_IMPLEMENTED;
317	0	}
318
319	0	return sock->ops->fn_set_option(sock, option, val);
320	0	}
321
322		_PUBLIC_ char socket_get_peer_name(struct socket_context sock, TALLOC_CTX *mem_ctx)
323	0	{
324	0	if (!sock->ops->fn_get_peer_name) {
325	0	return NULL;
326	0	}
327
328	0	return sock->ops->fn_get_peer_name(sock, mem_ctx);
329	0	}
330
331		_PUBLIC_ struct socket_address socket_get_peer_addr(struct socket_context sock, TALLOC_CTX *mem_ctx)
332	0	{
333	0	if (!sock->ops->fn_get_peer_addr) {
334	0	return NULL;
335	0	}
336
337	0	return sock->ops->fn_get_peer_addr(sock, mem_ctx);
338	0	}
339
340		_PUBLIC_ struct socket_address socket_get_my_addr(struct socket_context sock, TALLOC_CTX *mem_ctx)
341	0	{
342	0	if (!sock->ops->fn_get_my_addr) {
343	0	return NULL;
344	0	}
345
346	0	return sock->ops->fn_get_my_addr(sock, mem_ctx);
347	0	}
348
349		_PUBLIC_ struct tsocket_address socket_address_to_tsocket_address(TALLOC_CTX mem_ctx,
350		const struct socket_address *a)
351	0	{
352	0	struct tsocket_address *r;
353	0	int ret;
354
355	0	if (!a) {
356	0	return NULL;
357	0	}
358	0	if (a->sockaddr) {
359	0	ret = tsocket_address_bsd_from_sockaddr(mem_ctx,
360	0	a->sockaddr,
361	0	a->sockaddrlen,
362	0	&r);
363	0	} else {
364	0	ret = tsocket_address_inet_from_strings(mem_ctx,
365	0	a->family,
366	0	a->addr,
367	0	a->port,
368	0	&r);
369	0	}
370
371	0	if (ret != 0) {
372	0	return NULL;
373	0	}
374
375	0	return r;
376	0	}
377
378		_PUBLIC_ void socket_address_set_port(struct socket_address *a,
379		uint16_t port)
380	0	{
381	0	if (a->sockaddr) {
382	0	set_sockaddr_port(a->sockaddr, port);
383	0	} else {
384	0	a->port = port;
385	0	}
386
387	0	}
388
389		_PUBLIC_ struct socket_address tsocket_address_to_socket_address(TALLOC_CTX mem_ctx,
390		const struct tsocket_address *a)
391	0	{
392	0	ssize_t ret;
393	0	struct sockaddr_storage ss;
394	0	size_t sslen = sizeof(ss);
395
396	0	ret = tsocket_address_bsd_sockaddr(a, (struct sockaddr )(void )&ss, sslen);
397	0	if (ret < 0) {
398	0	return NULL;
399	0	}
400
401	0	return socket_address_from_sockaddr(mem_ctx, (struct sockaddr )(void )&ss, ret);
402	0	}
403
404		_PUBLIC_ struct tsocket_address socket_get_remote_addr(struct socket_context sock, TALLOC_CTX *mem_ctx)
405	0	{
406	0	struct socket_address *a;
407	0	struct tsocket_address *r;
408
409	0	a = socket_get_peer_addr(sock, mem_ctx);
410	0	if (a == NULL) {
411	0	return NULL;
412	0	}
413
414	0	r = socket_address_to_tsocket_address(mem_ctx, a);
415	0	talloc_free(a);
416	0	return r;
417	0	}
418
419		_PUBLIC_ struct tsocket_address socket_get_local_addr(struct socket_context sock, TALLOC_CTX *mem_ctx)
420	0	{
421	0	struct socket_address *a;
422	0	struct tsocket_address *r;
423
424	0	a = socket_get_my_addr(sock, mem_ctx);
425	0	if (a == NULL) {
426	0	return NULL;
427	0	}
428
429	0	r = socket_address_to_tsocket_address(mem_ctx, a);
430	0	talloc_free(a);
431	0	return r;
432	0	}
433
434		_PUBLIC_ int socket_get_fd(struct socket_context *sock)
435	0	{
436	0	if (!sock->ops->fn_get_fd) {
437	0	return -1;
438	0	}
439
440	0	return sock->ops->fn_get_fd(sock);
441	0	}
442
443		/*
444		call dup() on a socket, and close the old fd. This is used to change
445		the fd to the lowest available number, to make select() more
446		efficient (select speed depends on the maximum fd number passed to
447		it)
448		*/
449		_PUBLIC_ NTSTATUS socket_dup(struct socket_context *sock)
450	0	{
451	0	int fd;
452	0	if (sock->fd == -1) {
453	0	return NT_STATUS_INVALID_HANDLE;
454	0	}
455	0	fd = dup(sock->fd);
456	0	if (fd == -1) {
457	0	return map_nt_error_from_unix_common(errno);
458	0	}
459	0	close(sock->fd);
460	0	sock->fd = fd;
461	0	return NT_STATUS_OK;
462
463	0	}
464
465		/* Create a new socket_address. The type must match the socket type.
466		* The host parameter may be an IP or a hostname
467		*/
468
469		_PUBLIC_ struct socket_address socket_address_from_strings(TALLOC_CTX mem_ctx,
470		const char *family,
471		const char *host,
472		int port)
473	0	{
474	0	struct socket_address *addr = talloc(mem_ctx, struct socket_address);
475	0	if (!addr) {
476	0	return NULL;
477	0	}
478
479	0	if (strcmp(family, "ip") == 0 && is_ipaddress_v6(host)) {
480		/* leaving as "ip" would force IPv4 */
481	0	family = "ipv6";
482	0	}
483
484	0	addr->family = family;
485	0	addr->addr = talloc_strdup(addr, host);
486	0	if (!addr->addr) {
487	0	talloc_free(addr);
488	0	return NULL;
489	0	}
490	0	addr->port = port;
491	0	addr->sockaddr = NULL;
492	0	addr->sockaddrlen = 0;
493
494	0	return addr;
495	0	}
496
497		/* Create a new socket_address. Copy the struct sockaddr into the new
498		* structure. Used for hooks in the kerberos libraries, where they
499		* supply only a struct sockaddr */
500
501		_PUBLIC_ struct socket_address socket_address_from_sockaddr(TALLOC_CTX mem_ctx,
502		struct sockaddr *sockaddr,
503		size_t sockaddrlen)
504	0	{
505	0	struct socket_address *addr = talloc(mem_ctx, struct socket_address);
506	0	if (!addr) {
507	0	return NULL;
508	0	}
509	0	switch (sockaddr->sa_family) {
510	0	case AF_INET:
511	0	addr->family = "ipv4";
512	0	break;
513	0	#ifdef HAVE_IPV6
514	0	case AF_INET6:
515	0	addr->family = "ipv6";
516	0	break;
517	0	#endif
518	0	case AF_UNIX:
519	0	addr->family = "unix";
520	0	break;
521	0	}
522	0	addr->addr = NULL;
523	0	addr->port = 0;
524	0	addr->sockaddr = (struct sockaddr *)talloc_memdup(addr, sockaddr, sockaddrlen);
525	0	if (!addr->sockaddr) {
526	0	talloc_free(addr);
527	0	return NULL;
528	0	}
529	0	addr->sockaddrlen = sockaddrlen;
530	0	return addr;
531	0	}
532
533
534		/*
535		Create a new socket_address from sockaddr_storage
536		*/
537		_PUBLIC_ struct socket_address socket_address_from_sockaddr_storage(TALLOC_CTX mem_ctx,
538		const struct sockaddr_storage *sockaddr,
539		uint16_t port)
540	0	{
541	0	struct socket_address *addr = talloc_zero(mem_ctx, struct socket_address);
542	0	char addr_str[INET6_ADDRSTRLEN+1];
543	0	const char *str;
544
545	0	if (!addr) {
546	0	return NULL;
547	0	}
548	0	addr->port = port;
549	0	switch (sockaddr->ss_family) {
550	0	case AF_INET:
551	0	addr->family = "ipv4";
552	0	break;
553	0	#ifdef HAVE_IPV6
554	0	case AF_INET6:
555	0	addr->family = "ipv6";
556	0	break;
557	0	#endif
558	0	default:
559	0	talloc_free(addr);
560	0	return NULL;
561	0	}
562
563	0	str = print_sockaddr(addr_str, sizeof(addr_str), sockaddr);
564	0	if (str == NULL) {
565	0	talloc_free(addr);
566	0	return NULL;
567	0	}
568	0	addr->addr = talloc_strdup(addr, str);
569	0	if (addr->addr == NULL) {
570	0	talloc_free(addr);
571	0	return NULL;
572	0	}
573
574	0	return addr;
575	0	}
576
577		/* Copy a socket_address structure */
578		struct socket_address socket_address_copy(TALLOC_CTX mem_ctx,
579		const struct socket_address *oaddr)
580	0	{
581	0	struct socket_address *addr = talloc_zero(mem_ctx, struct socket_address);
582	0	if (!addr) {
583	0	return NULL;
584	0	}
585	0	addr->family = oaddr->family;
586	0	if (oaddr->addr) {
587	0	addr->addr = talloc_strdup(addr, oaddr->addr);
588	0	if (!addr->addr) {
589	0	goto nomem;
590	0	}
591	0	}
592	0	addr->port = oaddr->port;
593	0	if (oaddr->sockaddr) {
594	0	addr->sockaddr = (struct sockaddr *)talloc_memdup(addr,
595	0	oaddr->sockaddr,
596	0	oaddr->sockaddrlen);
597	0	if (!addr->sockaddr) {
598	0	goto nomem;
599	0	}
600	0	addr->sockaddrlen = oaddr->sockaddrlen;
601	0	}
602
603	0	return addr;
604
605	0	nomem:
606	0	talloc_free(addr);
607	0	return NULL;
608	0	}
609
610		_PUBLIC_ const struct socket_ops socket_getops_byname(const char family, enum socket_type type)
611	0	{
612	0	extern const struct socket_ops *socket_ipv4_ops(enum socket_type);
613	0	extern const struct socket_ops *socket_ipv6_ops(enum socket_type);
614	0	extern const struct socket_ops *socket_unixdom_ops(enum socket_type);
615
616	0	if (strcmp("ip", family) == 0 \|\|
617	0	strcmp("ipv4", family) == 0) {
618	0	return socket_ipv4_ops(type);
619	0	}
620
621	0	#ifdef HAVE_IPV6
622	0	if (strcmp("ipv6", family) == 0) {
623	0	return socket_ipv6_ops(type);
624	0	}
625	0	#endif
626
627	0	if (strcmp("unix", family) == 0) {
628	0	return socket_unixdom_ops(type);
629	0	}
630
631	0	return NULL;
632	0	}
633
634		/*
635		set some flags on a socket
636		*/
637		void socket_set_flags(struct socket_context *sock, unsigned flags)
638	0	{
639	0	sock->flags \|= flags;
640	0	}