GNUnet  0.18.1
Network library

Basic low-level networking interface. More...

Collaboration diagram for Network library:

Data Structures

struct  GNUNET_NETWORK_FDSet
 collection of IO descriptors More...
 

Functions

enum GNUNET_GenericReturnValue GNUNET_NETWORK_test_pf (int pf)
 Test if the given protocol family is supported by this system. More...
 
char * GNUNET_NETWORK_shorten_unixpath (char *unixpath)
 Given a unixpath that is too long (larger than UNIX_PATH_MAX), shorten it to an acceptable length while keeping it unique and making sure it remains a valid filename (if possible). More...
 
void GNUNET_NETWORK_unix_precheck (const struct sockaddr_un *un)
 If services crash, they can leave a unix domain socket file on the disk. More...
 
struct GNUNET_NETWORK_HandleGNUNET_NETWORK_socket_accept (const struct GNUNET_NETWORK_Handle *desc, struct sockaddr *address, socklen_t *address_len)
 Accept a new connection on a socket. More...
 
struct GNUNET_NETWORK_HandleGNUNET_NETWORK_socket_box_native (int fd)
 Box a native socket (and check that it is a socket). More...
 
int GNUNET_NETWORK_socket_set_blocking (struct GNUNET_NETWORK_Handle *fd, int doBlock)
 Set if a socket should use blocking or non-blocking IO. More...
 
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_bind (struct GNUNET_NETWORK_Handle *desc, const struct sockaddr *address, socklen_t address_len)
 Bind a socket to a particular address. More...
 
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_close (struct GNUNET_NETWORK_Handle *desc)
 Close a socket. More...
 
void GNUNET_NETWORK_socket_free_memory_only_ (struct GNUNET_NETWORK_Handle *desc)
 Only free memory of a socket, keep the file descriptor untouched. More...
 
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_connect (const struct GNUNET_NETWORK_Handle *desc, const struct sockaddr *address, socklen_t address_len)
 Connect a socket to some remote address. More...
 
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_getsockopt (const struct GNUNET_NETWORK_Handle *desc, int level, int optname, void *optval, socklen_t *optlen)
 Get socket options. More...
 
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_listen (const struct GNUNET_NETWORK_Handle *desc, int backlog)
 Listen on a socket. More...
 
ssize_t GNUNET_NETWORK_socket_recvfrom_amount (const struct GNUNET_NETWORK_Handle *desc)
 How much data is available to be read on this descriptor? More...
 
ssize_t GNUNET_NETWORK_socket_recvfrom (const struct GNUNET_NETWORK_Handle *desc, void *buffer, size_t length, struct sockaddr *src_addr, socklen_t *addrlen)
 Read data from a socket (always non-blocking). More...
 
ssize_t GNUNET_NETWORK_socket_recv (const struct GNUNET_NETWORK_Handle *desc, void *buffer, size_t length)
 Read data from a connected socket (always non-blocking). More...
 
int GNUNET_NETWORK_socket_select (struct GNUNET_NETWORK_FDSet *rfds, struct GNUNET_NETWORK_FDSet *wfds, struct GNUNET_NETWORK_FDSet *efds, struct GNUNET_TIME_Relative timeout)
 Check if sockets meet certain conditions. More...
 
ssize_t GNUNET_NETWORK_socket_send (const struct GNUNET_NETWORK_Handle *desc, const void *buffer, size_t length)
 Send data (always non-blocking). More...
 
ssize_t GNUNET_NETWORK_socket_sendto (const struct GNUNET_NETWORK_Handle *desc, const void *message, size_t length, const struct sockaddr *dest_addr, socklen_t dest_len)
 Send data to a particular destination (always non-blocking). More...
 
int GNUNET_NETWORK_socket_setsockopt (struct GNUNET_NETWORK_Handle *fd, int level, int option_name, const void *option_value, socklen_t option_len)
 Set socket option. More...
 
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_shutdown (struct GNUNET_NETWORK_Handle *desc, int how)
 Shut down socket operations. More...
 
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_disable_corking (struct GNUNET_NETWORK_Handle *desc)
 Disable the "CORK" feature for communication with the given socket, forcing the OS to immediately flush the buffer on transmission instead of potentially buffering multiple messages. More...
 
struct GNUNET_NETWORK_HandleGNUNET_NETWORK_socket_create (int domain, int type, int protocol)
 Create a new socket. More...
 
void GNUNET_NETWORK_fdset_zero (struct GNUNET_NETWORK_FDSet *fds)
 Reset FD set (clears all file descriptors). More...
 
void GNUNET_NETWORK_fdset_set (struct GNUNET_NETWORK_FDSet *fds, const struct GNUNET_NETWORK_Handle *desc)
 Add a socket to the FD set. More...
 
int GNUNET_NETWORK_fdset_isset (const struct GNUNET_NETWORK_FDSet *fds, const struct GNUNET_NETWORK_Handle *desc)
 Check whether a socket is part of the fd set. More...
 
void GNUNET_NETWORK_fdset_add (struct GNUNET_NETWORK_FDSet *dst, const struct GNUNET_NETWORK_FDSet *src)
 Add one fd set to another (computes the union). More...
 
void GNUNET_NETWORK_fdset_copy (struct GNUNET_NETWORK_FDSet *to, const struct GNUNET_NETWORK_FDSet *from)
 Copy one fd set to another. More...
 
int GNUNET_NETWORK_get_fd (const struct GNUNET_NETWORK_Handle *desc)
 Return file descriptor for this network handle. More...
 
struct sockaddr * GNUNET_NETWORK_get_addr (const struct GNUNET_NETWORK_Handle *desc)
 Return the sockaddr for this network handle. More...
 
socklen_t GNUNET_NETWORK_get_addrlen (const struct GNUNET_NETWORK_Handle *desc)
 Return sockaddr length for this network handle. More...
 
void GNUNET_NETWORK_fdset_copy_native (struct GNUNET_NETWORK_FDSet *to, const fd_set *from, int nfds)
 Copy a native fd set into the GNUnet representation. More...
 
void GNUNET_NETWORK_fdset_set_native (struct GNUNET_NETWORK_FDSet *to, int nfd)
 Set a native fd in a set. More...
 
int GNUNET_NETWORK_fdset_test_native (const struct GNUNET_NETWORK_FDSet *to, int nfd)
 Test native fd in a set. More...
 
void GNUNET_NETWORK_fdset_handle_set (struct GNUNET_NETWORK_FDSet *fds, const struct GNUNET_DISK_FileHandle *h)
 Add a file handle to the fd set. More...
 
void GNUNET_NETWORK_fdset_handle_set_first (struct GNUNET_NETWORK_FDSet *fds, const struct GNUNET_DISK_FileHandle *h)
 Add a file handle to the fd set On W32: ensure that the handle is first in the array. More...
 
int GNUNET_NETWORK_fdset_handle_isset (const struct GNUNET_NETWORK_FDSet *fds, const struct GNUNET_DISK_FileHandle *h)
 Check if a file handle is part of an fd set. More...
 
int GNUNET_NETWORK_fdset_overlap (const struct GNUNET_NETWORK_FDSet *fds1, const struct GNUNET_NETWORK_FDSet *fds2)
 Checks if two fd sets overlap. More...
 
struct GNUNET_NETWORK_FDSetGNUNET_NETWORK_fdset_create (void)
 Creates an fd set. More...
 
void GNUNET_NETWORK_fdset_destroy (struct GNUNET_NETWORK_FDSet *fds)
 Releases the associated memory of an fd set. More...
 
int GNUNET_NETWORK_test_port_free (int ipproto, uint16_t port)
 Test if the given port is available. More...
 

Detailed Description

Basic low-level networking interface.

Function Documentation

◆ GNUNET_NETWORK_test_pf()

enum GNUNET_GenericReturnValue GNUNET_NETWORK_test_pf ( int  pf)

Test if the given protocol family is supported by this system.

Parameters
pfprotocol family to test (PF_INET, PF_INET6, PF_UNIX)
Returns
GNUNET_OK if the PF is supported

Definition at line 1 of file network.c.

80 {
81  static int cache_v4 = -1;
82  static int cache_v6 = -1;
83  static int cache_un = -1;
84  int s;
85  int ret;
86 
87  switch (pf)
88  {
89  case PF_INET:
90  if (-1 != cache_v4)
91  return cache_v4;
92  break;
93 
94  case PF_INET6:
95  if (-1 != cache_v6)
96  return cache_v6;
97  break;
98 
99 #ifdef PF_UNIX
100  case PF_UNIX:
101  if (-1 != cache_un)
102  return cache_un;
103  break;
104 #endif
105  }
106  s = socket (pf, SOCK_STREAM, 0);
107  if (-1 == s)
108  {
109  if (EAFNOSUPPORT != errno)
110  {
112  "socket");
113  return GNUNET_SYSERR;
114  }
115  ret = GNUNET_NO;
116  }
117  else
118  {
119  GNUNET_break (0 == close (s));
120  ret = GNUNET_OK;
121  }
122  switch (pf)
123  {
124  case PF_INET:
125  cache_v4 = ret;
126  break;
127 
128  case PF_INET6:
129  cache_v6 = ret;
130  break;
131 
132 #ifdef PF_UNIX
133  case PF_UNIX:
134  cache_un = ret;
135  break;
136 #endif
137  }
138  return ret;
139 }
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
@ GNUNET_OK
Definition: gnunet_common.h:99
@ GNUNET_NO
Definition: gnunet_common.h:98
@ GNUNET_SYSERR
Definition: gnunet_common.h:97
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
#define GNUNET_log_strerror(level, cmd)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
@ GNUNET_ERROR_TYPE_WARNING

Referenced by get_server_addresses(), handle_gns_result(), parse_ip_options(), run(), tcp_address_to_sockaddr_port_only(), and udp_address_to_sockaddr().

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◆ GNUNET_NETWORK_shorten_unixpath()

char* GNUNET_NETWORK_shorten_unixpath ( char *  unixpath)

Given a unixpath that is too long (larger than UNIX_PATH_MAX), shorten it to an acceptable length while keeping it unique and making sure it remains a valid filename (if possible).

Parameters
unixpathlong path, will be freed (or same pointer returned with moved 0-termination).
Returns
shortened unixpath, NULL on error

Definition at line 143 of file network.c.

144 {
145  struct sockaddr_un dummy;
146  size_t slen;
147  char *end;
148  struct GNUNET_HashCode sh;
150  size_t upm;
151 
152  upm = sizeof(dummy.sun_path);
153  slen = strlen (unixpath);
154  if (slen < upm)
155  return unixpath; /* no shortening required */
156  GNUNET_CRYPTO_hash (unixpath, slen, &sh);
157  while (16 + strlen (unixpath) >= upm)
158  {
159  if (NULL == (end = strrchr (unixpath, '/')))
160  {
162  _ (
163  "Unable to shorten unix path `%s' while keeping name unique\n"),
164  unixpath);
165  GNUNET_free (unixpath);
166  return NULL;
167  }
168  *end = '\0';
169  }
171  ae.encoding[16] = '\0';
172  strcat (unixpath, (char *) ae.encoding);
173  return unixpath;
174 }
static int end
Set if we are to shutdown all services (including ARM).
Definition: gnunet-arm.c:34
static struct SolverHandle * sh
static struct in_addr dummy
Target "dummy" address of the packet we pretend to respond to.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
void GNUNET_CRYPTO_hash_to_enc(const struct GNUNET_HashCode *block, struct GNUNET_CRYPTO_HashAsciiEncoded *result)
Convert hash to ASCII encoding.
Definition: crypto_hash.c:55
#define GNUNET_log(kind,...)
@ GNUNET_ERROR_TYPE_ERROR
#define GNUNET_free(ptr)
Wrapper around free.
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
0-terminated ASCII encoding of a struct GNUNET_HashCode.
A 512-bit hashcode.

References _, dummy, GNUNET_CRYPTO_HashAsciiEncoded::encoding, end, GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_hash_to_enc(), GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_log, and sh.

Referenced by get_server_addresses(), LEGACY_SERVICE_get_server_addresses(), and try_unixpath().

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◆ GNUNET_NETWORK_unix_precheck()

void GNUNET_NETWORK_unix_precheck ( const struct sockaddr_un *  un)

If services crash, they can leave a unix domain socket file on the disk.

This needs to be manually removed, because otherwise both bind() and connect() for the respective address will fail. In this function, we test if such a left-over file exists, and if so, remove it (unless there is a listening service at the address).

Parameters
ununix domain socket address to check

Definition at line 178 of file network.c.

179 {
180  int s;
181  int eno;
182  struct stat sbuf;
183  int ret;
184 
185  s = socket (AF_UNIX, SOCK_STREAM, 0);
186  if (-1 == s)
187  {
189  "Failed to open AF_UNIX socket");
190  return;
191  }
192  ret = connect (s,
193  (struct sockaddr *) un,
194  sizeof(struct sockaddr_un));
195  eno = errno;
196  GNUNET_break (0 == close (s));
197  if (0 == ret)
198  return; /* another process is listening, do not remove! */
199  if (ECONNREFUSED != eno)
200  return; /* some other error, likely "no such file or directory" -- all well */
201  /* should unlink, but sanity checks first */
202  if (0 != stat (un->sun_path,
203  &sbuf))
204  return; /* failed to 'stat', likely does not exist after all */
205  if (S_IFSOCK != (S_IFMT & sbuf.st_mode))
206  return; /* refuse to unlink anything except sockets */
207  /* finally, really unlink */
209  "Removing left-over `%s' from previous exeuction\n",
210  un->sun_path);
211  if (0 != unlink (un->sun_path))
213  "unlink",
214  un->sun_path);
215 }
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
@ GNUNET_ERROR_TYPE_INFO

Referenced by create_listen_socket().

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◆ GNUNET_NETWORK_socket_accept()

struct GNUNET_NETWORK_Handle* GNUNET_NETWORK_socket_accept ( const struct GNUNET_NETWORK_Handle desc,
struct sockaddr *  address,
socklen_t *  address_len 
)

Accept a new connection on a socket.

Configure it for non-blocking IO and mark it as non-inheritable to child processes (set the close-on-exec flag).

Parameters
descbound socket
addressaddress of the connecting peer, may be NULL
address_lenlength of address
Returns
client socket

Definition at line 392 of file network.c.

395 {
396  struct GNUNET_NETWORK_Handle *ret;
397  int eno;
398 
400 #if DEBUG_NETWORK
401  {
402  struct sockaddr_storage name;
403  socklen_t namelen = sizeof(name);
404 
405  int gsn = getsockname (desc->fd,
406  (struct sockaddr *) &name,
407  &namelen);
408 
409  if (0 == gsn)
411  "Accepting connection on `%s'\n",
412  GNUNET_a2s ((const struct sockaddr *) &name,
413  namelen));
414  }
415 #endif
416  ret->fd = accept (desc->fd,
417  address,
418  address_len);
419  if (-1 == ret->fd)
420  {
421  eno = errno;
422  GNUNET_free (ret);
423  errno = eno;
424  return NULL;
425  }
426  if (GNUNET_OK !=
428  (NULL != address) ? address->sa_family :
429  desc->af,
430  SOCK_STREAM))
431  {
432  return NULL;
433  }
434  return ret;
435 }
static char * address
GNS address for this phone.
const char * GNUNET_a2s(const struct sockaddr *addr, socklen_t addrlen)
Convert a "struct sockaddr*" (IPv4 or IPv6 address) to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_DEBUG
#define GNUNET_new(type)
Allocate a struct or union of the given type.
static int initialize_network_handle(struct GNUNET_NETWORK_Handle *h, int af, int type)
Perform proper canonical initialization for a network handle.
Definition: network.c:335
#define LOG(kind,...)
Definition: network.c:31
const char * name
handle to a socket
Definition: network.c:53
int af
Address family / domain.
Definition: network.c:59

References address, GNUNET_NETWORK_Handle::af, GNUNET_NETWORK_Handle::fd, GNUNET_a2s(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_new, GNUNET_OK, initialize_network_handle(), LOG, name, and ret.

Referenced by accept_client(), do_accept(), GNUNET_CONNECTION_create_from_accept(), listen_cb(), and main().

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◆ GNUNET_NETWORK_socket_box_native()

struct GNUNET_NETWORK_Handle* GNUNET_NETWORK_socket_box_native ( int  fd)

Box a native socket (and check that it is a socket).

Parameters
fdsocket to box
Returns
NULL on error (including not supported on target platform)

Definition at line 579 of file network.c.

580 {
581  struct GNUNET_NETWORK_Handle *ret;
582 
583  if (fcntl (fd, F_GETFD) < 0)
584  return NULL; /* invalid FD */
586  ret->fd = fd;
587  ret->af = AF_UNSPEC;
588  return ret;
589 }

References GNUNET_NETWORK_Handle::fd, GNUNET_new, and ret.

Referenced by extract_handles(), libgnunet_plugin_dhtu_ip_init(), scheduler_fd_cb(), and setup_service().

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◆ GNUNET_NETWORK_socket_set_blocking()

int GNUNET_NETWORK_socket_set_blocking ( struct GNUNET_NETWORK_Handle fd,
int  doBlock 
)

Set if a socket should use blocking or non-blocking IO.

Parameters
fdsocket
doBlockblocking mode
Returns
GNUNET_OK on success, GNUNET_SYSERR on error

Definition at line 178 of file network.c.

226 {
227  int flags = fcntl (fd->fd, F_GETFL);
228 
229  if (flags == -1)
230  {
232  "fcntl");
233  return GNUNET_SYSERR;
234  }
235  if (doBlock)
236  flags &= ~O_NONBLOCK;
237 
238  else
239  flags |= O_NONBLOCK;
240  if (0 != fcntl (fd->fd,
241  F_SETFL,
242  flags))
243 
244  {
246  "fcntl");
247  return GNUNET_SYSERR;
248  }
249  return GNUNET_OK;
250 }
#define LOG_STRERROR(kind, syscall)
Definition: network.c:37

References GNUNET_break, GNUNET_ERROR_TYPE_INFO, GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_log_strerror, GNUNET_log_strerror_file, and ret.

Referenced by initialize_network_handle(), and main().

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◆ GNUNET_NETWORK_socket_bind()

enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_bind ( struct GNUNET_NETWORK_Handle desc,
const struct sockaddr *  address,
socklen_t  address_len 
)

Bind a socket to a particular address.

Parameters
descsocket to bind
addressaddress to be bound
address_lenlength of address
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 392 of file network.c.

442 {
443  int ret;
444 
445 #ifdef IPV6_V6ONLY
446 #ifdef IPPROTO_IPV6
447  {
448  const int on = 1;
449 
450  if (AF_INET6 == desc->af)
451  if (setsockopt (desc->fd,
452  IPPROTO_IPV6,
453  IPV6_V6ONLY,
454  (const void *) &on,
455  sizeof(on)))
457  "setsockopt");
458  }
459 #endif
460 #endif
461  if (AF_UNIX == address->sa_family)
462  GNUNET_NETWORK_unix_precheck ((const struct sockaddr_un *) address);
463 
464  {
465  const int on = 1;
466 
467  if ( (SOCK_STREAM == desc->type) &&
468  (0 != setsockopt (desc->fd,
469  SOL_SOCKET,
470  SO_REUSEADDR,
471  &on, sizeof(on))) )
473  "setsockopt");
474  }
475  {
476  /* set permissions of newly created non-abstract UNIX domain socket to
477  "user-only"; applications can choose to relax this later */
478  mode_t old_mask = 0; /* assigned to make compiler happy */
479  const struct sockaddr_un *un = (const struct sockaddr_un *) address;
480  int not_abstract = 0;
481 
482  if ((AF_UNIX == address->sa_family)
483  && ('\0' != un->sun_path[0])) /* Not an abstract socket */
484  not_abstract = 1;
485  if (not_abstract)
486  old_mask = umask (S_IWGRP | S_IRGRP | S_IXGRP | S_IWOTH | S_IROTH
487  | S_IXOTH);
488 
489  ret = bind (desc->fd,
490  address,
491  address_len);
492 
493  if (not_abstract)
494  (void) umask (old_mask);
495  }
496  if (0 != ret)
497  return GNUNET_SYSERR;
498 
499  desc->addr = GNUNET_malloc (address_len);
500  GNUNET_memcpy (desc->addr, address, address_len);
501  desc->addrlen = address_len;
502 
503  return GNUNET_OK;
504 }
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_malloc(size)
Wrapper around malloc.
void GNUNET_NETWORK_unix_precheck(const struct sockaddr_un *un)
If services crash, they can leave a unix domain socket file on the disk.
Definition: network.c:178
struct sockaddr * addr
Address we were bound to, or NULL.
Definition: network.c:74
int type
Type of the socket.
Definition: network.c:64
socklen_t addrlen
Number of bytes in addr.
Definition: network.c:69

Referenced by bind_v4(), bind_v6(), create_listen_socket(), GNUNET_NAT_AUTO_test_start(), GNUNET_NAT_test_start(), GNUNET_NETWORK_test_port_free(), GNUNET_TESTING_reserve_port(), init_socket(), open_listen_socket(), open_socket(), run(), setup_sockets(), and unix_transport_server_start().

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◆ GNUNET_NETWORK_socket_close()

enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_close ( struct GNUNET_NETWORK_Handle desc)

Close a socket.

Parameters
descsocket to close
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 392 of file network.c.

509 {
510  int ret;
511 
512  ret = close (desc->fd);
513 
514  const struct sockaddr_un *un = (const struct sockaddr_un *) desc->addr;
515 
516  /* Cleanup the UNIX domain socket and its parent directories in case of non
517  abstract sockets */
518  if ((AF_UNIX == desc->af) &&
519  (NULL != desc->addr) &&
520  ('\0' != un->sun_path[0]))
521  {
522  char *dirname = GNUNET_strndup (un->sun_path,
523  sizeof(un->sun_path));
524 
525  if (0 != unlink (dirname))
526  {
528  "unlink",
529  dirname);
530  }
531  else
532  {
533  size_t len;
534 
535  len = strlen (dirname);
536  while ((len > 0) && (dirname[len] != DIR_SEPARATOR))
537  len--;
538  dirname[len] = '\0';
539  if ((0 != len) && (0 != rmdir (dirname)))
540  {
541  switch (errno)
542  {
543  case EACCES:
544  case ENOTEMPTY:
545  case EPERM:
546  /* these are normal and can just be ignored */
547  break;
548 
549  default:
551  "rmdir",
552  dirname);
553  break;
554  }
555  }
556  }
557  GNUNET_free (dirname);
558  }
560  return (ret == 0) ? GNUNET_OK : GNUNET_SYSERR;
561 }
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
#define GNUNET_strndup(a, length)
Wrapper around GNUNET_xstrndup_.
void GNUNET_NETWORK_socket_free_memory_only_(struct GNUNET_NETWORK_Handle *desc)
Only free memory of a socket, keep the file descriptor untouched.
Definition: network.c:565
#define LOG_STRERROR_FILE(kind, syscall, filename)
Definition: network.c:32
#define DIR_SEPARATOR
Definition: platform.h:164

Referenced by accept_client(), bind_v4(), bind_v6(), cancel_aps(), cleanup_ar(), cleanup_rs(), cleanup_s5r(), connect_probe_continuation(), connection_client_destroy_impl(), create_listen_socket(), do_accept(), do_dns_read(), do_read(), do_shutdown(), do_udp_read(), finish_client_drop(), free_proto_queue(), get_lt_delete_it(), get_server_addresses(), GNUNET_CONNECTION_connect_socket(), GNUNET_CONNECTION_create_from_accept(), GNUNET_CONNECTION_create_from_connect_to_unixpath(), GNUNET_CONNECTION_destroy(), GNUNET_NAT_AUTO_test_start(), GNUNET_NAT_AUTO_test_stop(), GNUNET_NAT_test_start(), GNUNET_NAT_test_stop(), GNUNET_NETWORK_test_port_free(), GNUNET_SERVER_destroy(), GNUNET_SERVER_stop_listening(), GNUNET_TESTING_reserve_port(), init_socket(), initialize_network_handle(), kill_httpd(), LEGACY_SERVICE_get_server_addresses(), libgnunet_plugin_dhtu_ip_done(), libgnunet_plugin_transport_unix_done(), main(), mq_init(), open_listen_socket(), open_socket(), queue_destroy(), run(), server_check_ipv6_support(), setup_service(), setup_sockets(), shutdown_task(), signal_transmit_error(), stop_stun(), tcp_plugin_get_session(), tcp_send(), teardown_service(), try_connect_using_address(), try_send_tcp(), try_send_udp(), try_unixpath(), and unix_transport_server_start().

◆ GNUNET_NETWORK_socket_free_memory_only_()

void GNUNET_NETWORK_socket_free_memory_only_ ( struct GNUNET_NETWORK_Handle desc)

Only free memory of a socket, keep the file descriptor untouched.

Parameters
descsocket

Definition at line 565 of file network.c.

566 {
567  GNUNET_free (desc->addr);
568  GNUNET_free (desc);
569 }

References GNUNET_NETWORK_Handle::addr, and GNUNET_free.

Referenced by cleanup_ar(), cleanup_s5r(), destroy_task(), finish_client_drop(), and GNUNET_CONNECTION_destroy().

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◆ GNUNET_NETWORK_socket_connect()

enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_connect ( const struct GNUNET_NETWORK_Handle desc,
const struct sockaddr *  address,
socklen_t  address_len 
)

Connect a socket to some remote address.

Parameters
descsocket to connect
addresspeer address
address_lenof address
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise
Parameters
descsocket
addresspeer address
address_lenlength of address
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 601 of file network.c.

604 {
605  int ret;
606 
607  ret = connect (desc->fd,
608  address,
609  address_len);
610 
611  return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
612 }

References address, GNUNET_NETWORK_Handle::fd, GNUNET_OK, GNUNET_SYSERR, and ret.

Referenced by GNUNET_CONNECTION_connect_socket(), GNUNET_CONNECTION_create_from_connect_to_unixpath(), main(), mq_init(), try_connect_using_address(), try_send_tcp(), and try_unixpath().

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◆ GNUNET_NETWORK_socket_getsockopt()

enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_getsockopt ( const struct GNUNET_NETWORK_Handle desc,
int  level,
int  optname,
void *  optval,
socklen_t *  optlen 
)

Get socket options.

Parameters
descsocket to inspect
levelprotocol level of the option
optnameidentifier of the option
optvaloptions
optlenlength of optval
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise
Parameters
descsocket
levelprotocol level of the option
optnameidentifier of the option
optvaloptions
optlenlength of optval
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 626 of file network.c.

631 {
632  int ret;
633 
634  ret = getsockopt (desc->fd,
635  level,
636  optname,
637  optval, optlen);
638 
639  return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
640 }

References GNUNET_NETWORK_Handle::fd, GNUNET_OK, GNUNET_SYSERR, and ret.

Referenced by connect_probe_continuation(), select_write_cb(), and unix_plugin_get_network().

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◆ GNUNET_NETWORK_socket_listen()

enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_listen ( const struct GNUNET_NETWORK_Handle desc,
int  backlog 
)

Listen on a socket.

Parameters
descsocket to start listening on
backloglength of the listen queue
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise
Parameters
descsocket
backloglength of the listen queue
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 651 of file network.c.

653 {
654  int ret;
655 
656  ret = listen (desc->fd,
657  backlog);
658 
659  return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
660 }

References GNUNET_NETWORK_Handle::fd, GNUNET_OK, GNUNET_SYSERR, and ret.

Referenced by create_listen_socket(), GNUNET_NAT_AUTO_test_start(), GNUNET_NAT_test_start(), init_socket(), open_listen_socket(), and run().

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◆ GNUNET_NETWORK_socket_recvfrom_amount()

ssize_t GNUNET_NETWORK_socket_recvfrom_amount ( const struct GNUNET_NETWORK_Handle desc)

How much data is available to be read on this descriptor?

Parameters
descsocket
Returns
GNUNET_SYSERR if no data is available, or on error!

Definition at line 670 of file network.c.

671 {
672  int error;
673 
674  /* How much is there to be read? */
675  int pending;
676 
677  error = ioctl (desc->fd,
678  FIONREAD,
679  &pending);
680  if (0 == error)
681  return (ssize_t) pending;
682  return GNUNET_SYSERR;
683 }
static unsigned int pending
The number of queries that are outstanding.

References GNUNET_NETWORK_Handle::fd, GNUNET_SYSERR, and pending.

Referenced by read_dns4(), read_dns6(), and stun_read_task().

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◆ GNUNET_NETWORK_socket_recvfrom()

ssize_t GNUNET_NETWORK_socket_recvfrom ( const struct GNUNET_NETWORK_Handle desc,
void *  buffer,
size_t  length,
struct sockaddr *  src_addr,
socklen_t *  addrlen 
)

Read data from a socket (always non-blocking).

Parameters
descsocket
bufferbuffer
lengthlength of buffer
src_addreither the source to recv from, or all zeroes to be filled in by recvfrom
addrlenlength of the addr

Definition at line 687 of file network.c.

692 {
693  int flags = 0;
694 
695 #ifdef MSG_DONTWAIT
696  flags |= MSG_DONTWAIT;
697 #endif
698  return recvfrom (desc->fd,
699  buffer,
700  length,
701  flags,
702  src_addr,
703  addrlen);
704 }

References GNUNET_NETWORK_Handle::addrlen, and GNUNET_NETWORK_Handle::fd.

Referenced by do_dns_read(), read_dns4(), read_dns6(), select_read_cb(), sock_read(), stun_read_task(), udp_select_read(), and unix_plugin_do_read().

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◆ GNUNET_NETWORK_socket_recv()

ssize_t GNUNET_NETWORK_socket_recv ( const struct GNUNET_NETWORK_Handle desc,
void *  buffer,
size_t  length 
)

Read data from a connected socket (always non-blocking).

Parameters
descsocket
bufferbuffer
lengthlength of buffer
Returns
number of bytes read
Parameters
descsocket
bufferbuffer
lengthlength of buffer
Returns
number of bytes received, -1 on error

Definition at line 716 of file network.c.

719 {
720  int ret;
721  int flags;
722 
723  flags = 0;
724 
725 #ifdef MSG_DONTWAIT
726  flags |= MSG_DONTWAIT;
727 #endif
728  ret = recv (desc->fd,
729  buffer,
730  length,
731  flags);
732  return ret;
733 }

References GNUNET_NETWORK_Handle::fd, and ret.

Referenced by do_read(), do_s5r_read(), do_udp_read(), proto_read_kx(), queue_read(), queue_read_kx(), and receive_ready().

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◆ GNUNET_NETWORK_socket_select()

int GNUNET_NETWORK_socket_select ( struct GNUNET_NETWORK_FDSet rfds,
struct GNUNET_NETWORK_FDSet wfds,
struct GNUNET_NETWORK_FDSet efds,
const struct GNUNET_TIME_Relative  timeout 
)

Check if sockets meet certain conditions.

Parameters
rfdsset of sockets to be checked for readability
wfdsset of sockets to be checked for writability
efdsset of sockets to be checked for exceptions
timeoutrelative value when to return
Returns
number of selected sockets, GNUNET_SYSERR on error

Check if sockets meet certain conditions.

Parameters
rfdsset of sockets or pipes to be checked for readability
wfdsset of sockets or pipes to be checked for writability
efdsset of sockets or pipes to be checked for exceptions
timeoutrelative value when to return
Returns
number of selected sockets or pipes, GNUNET_SYSERR on error

Definition at line 1260 of file network.c.

1264 {
1265  int nfds;
1266  struct timeval tv;
1267 
1268  if (NULL != rfds)
1269  nfds = rfds->nsds;
1270  else
1271  nfds = 0;
1272  if (NULL != wfds)
1273  nfds = GNUNET_MAX (nfds,
1274  wfds->nsds);
1275  if (NULL != efds)
1276  nfds = GNUNET_MAX (nfds,
1277  efds->nsds);
1278  if ((0 == nfds) &&
1280  {
1281  GNUNET_break (0);
1283  _ (
1284  "Fatal internal logic error, process hangs in `%s' (abort with CTRL-C)!\n"),
1285  "select");
1286  }
1287  if (timeout.rel_value_us / GNUNET_TIME_UNIT_SECONDS.rel_value_us > (unsigned
1288  long long)
1289  LONG_MAX)
1290  {
1291  tv.tv_sec = LONG_MAX;
1292  tv.tv_usec = 999999L;
1293  }
1294  else
1295  {
1296  tv.tv_sec = (long) (timeout.rel_value_us
1297  / GNUNET_TIME_UNIT_SECONDS.rel_value_us);
1298  tv.tv_usec =
1300  - (tv.tv_sec * GNUNET_TIME_UNIT_SECONDS.rel_value_us));
1301  }
1302  return select (nfds,
1303  (NULL != rfds) ? &rfds->sds : NULL,
1304  (NULL != wfds) ? &wfds->sds : NULL,
1305  (NULL != efds) ? &efds->sds : NULL,
1306  (timeout.rel_value_us ==
1307  GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us) ? NULL : &tv);
1308 }
static struct GNUNET_TIME_Relative timeout
Desired timeout for the lookup (default is no timeout).
Definition: gnunet-abd.c:61
#define GNUNET_MAX(a, b)
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
#define GNUNET_TIME_UNIT_SECONDS
One second.
int nsds
Maximum number of any socket descriptor in the set (plus one)
fd_set sds
Bitset with the descriptors.
uint64_t rel_value_us
The actual value.

References _, GNUNET_break, GNUNET_ERROR_TYPE_ERROR, GNUNET_MAX, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_TIME_UNIT_SECONDS, LOG, GNUNET_NETWORK_FDSet::nsds, GNUNET_TIME_Relative::rel_value_us, GNUNET_NETWORK_FDSet::sds, and timeout.

Referenced by main(), and select_loop().

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◆ GNUNET_NETWORK_socket_send()

ssize_t GNUNET_NETWORK_socket_send ( const struct GNUNET_NETWORK_Handle desc,
const void *  buffer,
size_t  length 
)

Send data (always non-blocking).

Parameters
descsocket
bufferdata to send
lengthsize of the buffer
Returns
number of bytes sent, GNUNET_SYSERR on error

Definition at line 737 of file network.c.

740 {
741  int ret;
742  int flags;
743 
744  flags = 0;
745 #ifdef MSG_DONTWAIT
746  flags |= MSG_DONTWAIT;
747 #endif
748 #ifdef MSG_NOSIGNAL
749  flags |= MSG_NOSIGNAL;
750 #endif
751  ret = send (desc->fd,
752  buffer,
753  length,
754  flags);
755  return ret;
756 }

References GNUNET_NETWORK_Handle::fd, and ret.

Referenced by do_send(), do_write(), main(), queue_write(), recv_message(), tcp_send(), and transmit_ready().

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◆ GNUNET_NETWORK_socket_sendto()

ssize_t GNUNET_NETWORK_socket_sendto ( const struct GNUNET_NETWORK_Handle desc,
const void *  message,
size_t  length,
const struct sockaddr *  dest_addr,
socklen_t  dest_len 
)

Send data to a particular destination (always non-blocking).

This function only works for UDP sockets.

Parameters
descsocket
messagedata to send
lengthsize of the data in message
dest_addrdestination address
dest_lenlength of dest_addr
Returns
number of bytes sent, GNUNET_SYSERR on error

This function only works for UDP sockets.

Parameters
descsocket
messagedata to send
lengthsize of the message
dest_addrdestination address
dest_lenlength of address
Returns
number of bytes sent, GNUNET_SYSERR on error

Definition at line 771 of file network.c.

776 {
777  int flags = 0;
778 
779 #ifdef MSG_DONTWAIT
780  flags |= MSG_DONTWAIT;
781 #endif
782 #ifdef MSG_NOSIGNAL
783  flags |= MSG_NOSIGNAL;
784 #endif
785  return sendto (desc->fd,
786  message,
787  length,
788  flags,
789  dest_addr,
790  dest_len);
791 }

References GNUNET_NETWORK_Handle::fd.

Referenced by ifc_broadcast(), ip_send(), mq_send_d(), mq_send_kx(), select_write_cb(), send_response(), send_UDPRekey(), stun_dns_callback(), transmit_query(), try_send_udp(), udp_ipv4_broadcast_send(), udp_ipv6_broadcast_send(), udp_select_send(), and unix_plugin_get_network().

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◆ GNUNET_NETWORK_socket_setsockopt()

int GNUNET_NETWORK_socket_setsockopt ( struct GNUNET_NETWORK_Handle fd,
int  level,
int  option_name,
const void *  option_value,
socklen_t  option_len 
)

Set socket option.

Parameters
fdsocket
levelprotocol level of the option
option_nameoption identifier
option_valuevalue to set
option_lensize of option_value
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 805 of file network.c.

810 {
811  return (0 == setsockopt (fd->fd,
812  level,
813  option_name,
814  option_value,
815  option_len))
816  ? GNUNET_OK
817  : GNUNET_SYSERR;
818 }

References GNUNET_NETWORK_Handle::fd, GNUNET_OK, and GNUNET_SYSERR.

Referenced by bi_destroy(), create_listen_socket(), iface_proc(), ifc_broadcast(), libgnunet_plugin_transport_tcp_init(), select_write_cb(), setup_broadcast(), tcp_plugin_get_session(), and unix_plugin_get_network().

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◆ GNUNET_NETWORK_socket_shutdown()

enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_shutdown ( struct GNUNET_NETWORK_Handle desc,
int  how 
)

Shut down socket operations.

Parameters
descsocket
howtype of shutdown
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 860 of file network.c.

862 {
863  int ret;
864 
865  ret = shutdown (desc->fd, how);
866 
867  return (0 == ret) ? GNUNET_OK : GNUNET_SYSERR;
868 }

References GNUNET_NETWORK_Handle::fd, GNUNET_OK, GNUNET_SYSERR, and ret.

Referenced by GNUNET_CONNECTION_create_from_accept(), GNUNET_CONNECTION_destroy(), signal_transmit_error(), and tcp_send().

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◆ GNUNET_NETWORK_socket_disable_corking()

enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_disable_corking ( struct GNUNET_NETWORK_Handle desc)

Disable the "CORK" feature for communication with the given socket, forcing the OS to immediately flush the buffer on transmission instead of potentially buffering multiple messages.

Essentially reduces the OS send buffers to zero.

Parameters
descsocket
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 881 of file network.c.

882 {
883  int ret = 0;
884 
885 #ifdef __linux__
886  int value = 0;
887 
888  if (0 !=
889  (ret =
890  setsockopt (desc->fd,
891  SOL_SOCKET,
892  SO_SNDBUF,
893  &value,
894  sizeof(value))))
896  "setsockopt");
897  if (0 !=
898  (ret =
899  setsockopt (desc->fd,
900  SOL_SOCKET,
901  SO_RCVBUF,
902  &value,
903  sizeof(value))))
905  "setsockopt");
906 #endif
907  return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
908 }
static char * value
Value of the record to add/remove.

References GNUNET_NETWORK_Handle::fd, GNUNET_ERROR_TYPE_WARNING, GNUNET_OK, GNUNET_SYSERR, LOG_STRERROR, ret, and value.

Referenced by GNUNET_CONNECTION_disable_corking().

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◆ GNUNET_NETWORK_socket_create()

struct GNUNET_NETWORK_Handle* GNUNET_NETWORK_socket_create ( int  domain,
int  type,
int  protocol 
)

Create a new socket.

Configure it for non-blocking IO and mark it as non-inheritable to child processes (set the close-on-exec flag).

Parameters
domaindomain of the socket
typesocket type
protocolnetwork protocol
Returns
new socket, NULL on error

Definition at line 832 of file network.c.

835 {
836  struct GNUNET_NETWORK_Handle *ret;
837  int fd;
838 
839  fd = socket (domain, type, protocol);
840  if (-1 == fd)
841  return NULL;
843  ret->fd = fd;
844  if (GNUNET_OK !=
846  domain,
847  type))
848  return NULL;
849  return ret;
850 }
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model

References GNUNET_NETWORK_Handle::fd, GNUNET_new, GNUNET_OK, initialize_network_handle(), ret, and type.

Referenced by bind_v4(), bind_v6(), create_listen_socket(), get_server_addresses(), GNUNET_CONNECTION_create_from_connect_to_unixpath(), GNUNET_CONNECTION_create_from_sockaddr(), GNUNET_NAT_AUTO_test_start(), GNUNET_NAT_test_start(), GNUNET_NETWORK_test_port_free(), GNUNET_TESTING_reserve_port(), init_socket(), LEGACY_SERVICE_get_server_addresses(), main(), mq_init(), open_listen_socket(), open_socket(), run(), server_check_ipv6_support(), setup_sockets(), tcp_plugin_get_session(), try_connect_using_address(), try_send_tcp(), try_send_udp(), try_unixpath(), and unix_transport_server_start().

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◆ GNUNET_NETWORK_fdset_zero()

void GNUNET_NETWORK_fdset_zero ( struct GNUNET_NETWORK_FDSet fds)

Reset FD set (clears all file descriptors).

Parameters
fdsfd set to clear

Reset FD set (clears all file descriptors).

Parameters
fdsfd set

Definition at line 917 of file network.c.

918 {
919  FD_ZERO (&fds->sds);
920  fds->nsds = 0;
921 }

References GNUNET_NETWORK_FDSet::nsds, and GNUNET_NETWORK_FDSet::sds.

Referenced by GNUNET_NETWORK_fdset_create(), GNUNET_SCHEDULER_do_work(), main(), and select_loop().

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◆ GNUNET_NETWORK_fdset_set()

void GNUNET_NETWORK_fdset_set ( struct GNUNET_NETWORK_FDSet fds,
const struct GNUNET_NETWORK_Handle desc 
)

Add a socket to the FD set.

Parameters
fdsfd set
descsocket to add

Definition at line 931 of file network.c.

933 {
934  FD_SET (desc->fd,
935  &fds->sds);
936  fds->nsds = GNUNET_MAX (fds->nsds,
937  desc->fd + 1);
938 }

References GNUNET_NETWORK_Handle::fd, GNUNET_MAX, GNUNET_NETWORK_FDSet::nsds, and GNUNET_NETWORK_FDSet::sds.

Referenced by GNUNET_SERVER_resume(), main(), and schedule_read().

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◆ GNUNET_NETWORK_fdset_isset()

int GNUNET_NETWORK_fdset_isset ( const struct GNUNET_NETWORK_FDSet fds,
const struct GNUNET_NETWORK_Handle desc 
)

Check whether a socket is part of the fd set.

Parameters
fdsfd set
descsocket
Returns
GNUNET_YES if the socket is in the set
Parameters
fdsfd set
descsocket
Returns
0 if the FD is not set

Definition at line 949 of file network.c.

951 {
952  return FD_ISSET (desc->fd,
953  &fds->sds);
954 }

References GNUNET_NETWORK_Handle::fd, and GNUNET_NETWORK_FDSet::sds.

Referenced by do_read(), do_s5r_read(), do_udp_read(), main(), process_listen_socket(), read_response(), receive_ready(), tcp_send(), transmit_ready(), udp_plugin_select_v4(), and udp_plugin_select_v6().

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◆ GNUNET_NETWORK_fdset_add()

void GNUNET_NETWORK_fdset_add ( struct GNUNET_NETWORK_FDSet dst,
const struct GNUNET_NETWORK_FDSet src 
)

Add one fd set to another (computes the union).

Parameters
dstthe fd set to add to
srcthe fd set to add from

Add one fd set to another (computes the union).

Parameters
dstthe fd set to add to
srcthe fd set to add from

Definition at line 964 of file network.c.

966 {
967  int nfds;
968 
969  for (nfds = src->nsds; nfds >= 0; nfds--)
970  if (FD_ISSET (nfds, &src->sds))
971  FD_SET (nfds, &dst->sds);
972  dst->nsds = GNUNET_MAX (dst->nsds,
973  src->nsds);
974 }

References GNUNET_MAX, GNUNET_NETWORK_FDSet::nsds, and GNUNET_NETWORK_FDSet::sds.

◆ GNUNET_NETWORK_fdset_copy()

void GNUNET_NETWORK_fdset_copy ( struct GNUNET_NETWORK_FDSet to,
const struct GNUNET_NETWORK_FDSet from 
)

Copy one fd set to another.

Parameters
todestination
fromsource

Definition at line 984 of file network.c.

986 {
987  FD_COPY (&from->sds,
988  &to->sds);
989  to->nsds = from->nsds;
990 }
#define FD_COPY(s, d)
Definition: network.c:219

References FD_COPY, GNUNET_NETWORK_FDSet::nsds, and GNUNET_NETWORK_FDSet::sds.

◆ GNUNET_NETWORK_get_fd()

int GNUNET_NETWORK_get_fd ( const struct GNUNET_NETWORK_Handle desc)

Return file descriptor for this network handle.

Parameters
descwrapper to process
Returns
POSIX file descriptor

Definition at line 1000 of file network.c.

1001 {
1002  return desc->fd;
1003 }

References GNUNET_NETWORK_Handle::fd.

Referenced by add_without_sets(), do_accept(), do_dns_read(), GNUNET_CONNECTION_create_from_accept(), GNUNET_SCHEDULER_add_net_with_priority(), init_fd_info(), init_socket(), mhd_connection_cb(), queue_destroy(), read_cb(), run(), setup_data_transfer(), and start_process().

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◆ GNUNET_NETWORK_get_addr()

struct sockaddr* GNUNET_NETWORK_get_addr ( const struct GNUNET_NETWORK_Handle desc)

Return the sockaddr for this network handle.

Parameters
descwrapper to process
Returns
POSIX file descriptor

Return the sockaddr for this network handle.

Parameters
descwrapper to process
Returns
sockaddr

Definition at line 1013 of file network.c.

1014 {
1015  return desc->addr;
1016 }

References GNUNET_NETWORK_Handle::addr.

Referenced by do_accept(), and setup_data_transfer().

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◆ GNUNET_NETWORK_get_addrlen()

socklen_t GNUNET_NETWORK_get_addrlen ( const struct GNUNET_NETWORK_Handle desc)

Return sockaddr length for this network handle.

Parameters
descwrapper to process
Returns
socklen_t for sockaddr

Definition at line 1026 of file network.c.

1027 {
1028  return desc->addrlen;
1029 }

References GNUNET_NETWORK_Handle::addrlen.

Referenced by do_accept(), and setup_data_transfer().

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◆ GNUNET_NETWORK_fdset_copy_native()

void GNUNET_NETWORK_fdset_copy_native ( struct GNUNET_NETWORK_FDSet to,
const fd_set *  from,
int  nfds 
)

Copy a native fd set into the GNUnet representation.

Parameters
todestination
fromnative source set
nfdsthe biggest socket number in from + 1

Copy a native fd set into the GNUnet representation.

Parameters
todestination
fromnative source set
nfdsthe biggest socket number in from + 1

Definition at line 1040 of file network.c.

1043 {
1044  FD_COPY (from,
1045  &to->sds);
1046  to->nsds = nfds;
1047 }

References FD_COPY, GNUNET_NETWORK_FDSet::nsds, and GNUNET_NETWORK_FDSet::sds.

Referenced by client_schedule(), context_task(), curl_download_prepare(), download_prepare(), prepare_daemon(), run_httpd(), schedule_httpd(), and server_schedule().

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◆ GNUNET_NETWORK_fdset_set_native()

void GNUNET_NETWORK_fdset_set_native ( struct GNUNET_NETWORK_FDSet to,
int  nfd 
)

Set a native fd in a set.

Parameters
todestination
nfdnative FD to set

Definition at line 1057 of file network.c.

1059 {
1060  GNUNET_assert ((nfd >= 0) && (nfd < FD_SETSIZE));
1061  FD_SET (nfd, &to->sds);
1062  to->nsds = GNUNET_MAX (nfd + 1,
1063  to->nsds);
1064 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.

References GNUNET_assert, GNUNET_MAX, GNUNET_NETWORK_FDSet::nsds, and GNUNET_NETWORK_FDSet::sds.

Referenced by GNUNET_SCHEDULER_do_work(), listen_stdio(), and select_loop().

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◆ GNUNET_NETWORK_fdset_test_native()

int GNUNET_NETWORK_fdset_test_native ( const struct GNUNET_NETWORK_FDSet to,
int  nfd 
)

Test native fd in a set.

Parameters
toset to test, NULL for empty set
nfdnative FD to test, -1 for none
Returns
GNUNET_YES if to contains nfd
Parameters
toset to test, NULL for empty set
nfdnative FD to test, or -1 for none
Returns
GNUNET_YES if FD is set in the set

Definition at line 1075 of file network.c.

1077 {
1078  if ((-1 == nfd) ||
1079  (NULL == to))
1080  return GNUNET_NO;
1081  return FD_ISSET (nfd, &to->sds) ? GNUNET_YES : GNUNET_NO;
1082 }
@ GNUNET_YES

References GNUNET_NO, GNUNET_YES, and GNUNET_NETWORK_FDSet::sds.

Referenced by extract_handles(), and select_loop().

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◆ GNUNET_NETWORK_fdset_handle_set()

void GNUNET_NETWORK_fdset_handle_set ( struct GNUNET_NETWORK_FDSet fds,
const struct GNUNET_DISK_FileHandle h 
)

Add a file handle to the fd set.

Parameters
fdsfd set
hthe file handle to add

Definition at line 1091 of file network.c.

1093 {
1094  int fd;
1095 
1098  &fd,
1099  sizeof(int)));
1100  FD_SET (fd,
1101  &fds->sds);
1102  fds->nsds = GNUNET_MAX (fd + 1,
1103  fds->nsds);
1104 }
enum GNUNET_GenericReturnValue GNUNET_DISK_internal_file_handle_(const struct GNUNET_DISK_FileHandle *fh, void *dst, size_t dst_len)
Retrieve OS file handle.
Definition: disk.c:1633
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:99

References GNUNET_assert, GNUNET_DISK_internal_file_handle_(), GNUNET_MAX, GNUNET_OK, h, GNUNET_NETWORK_FDSet::nsds, and GNUNET_NETWORK_FDSet::sds.

Referenced by GNUNET_NETWORK_fdset_handle_set_first(), GNUNET_SCHEDULER_driver_init(), and main().

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◆ GNUNET_NETWORK_fdset_handle_set_first()

void GNUNET_NETWORK_fdset_handle_set_first ( struct GNUNET_NETWORK_FDSet fds,
const struct GNUNET_DISK_FileHandle h 
)

Add a file handle to the fd set On W32: ensure that the handle is first in the array.

Parameters
fdsfd set
hthe file handle to add

Add a file handle to the fd set On W32: ensure that the handle is first in the array.

Parameters
fdsfd set
hthe file handle to add

Definition at line 1113 of file network.c.

1115 {
1117 }
void GNUNET_NETWORK_fdset_handle_set(struct GNUNET_NETWORK_FDSet *fds, const struct GNUNET_DISK_FileHandle *h)
Add a file handle to the fd set.
Definition: network.c:1091

References GNUNET_NETWORK_fdset_handle_set(), and h.

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◆ GNUNET_NETWORK_fdset_handle_isset()

int GNUNET_NETWORK_fdset_handle_isset ( const struct GNUNET_NETWORK_FDSet fds,
const struct GNUNET_DISK_FileHandle h 
)

Check if a file handle is part of an fd set.

Parameters
fdsfd set
hfile handle
Returns
GNUNET_YES if the file handle is part of the set

Definition at line 1128 of file network.c.

1130 {
1131  return FD_ISSET (h->fd,
1132  &fds->sds);
1133 }

References h, and GNUNET_NETWORK_FDSet::sds.

Referenced by cmd_read().

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◆ GNUNET_NETWORK_fdset_overlap()

int GNUNET_NETWORK_fdset_overlap ( const struct GNUNET_NETWORK_FDSet fds1,
const struct GNUNET_NETWORK_FDSet fds2 
)

Checks if two fd sets overlap.

Parameters
fds1first fd set
fds2second fd set
Returns
GNUNET_YES if they do overlap, GNUNET_NO otherwise

Definition at line 1144 of file network.c.

1146 {
1147  int nfds;
1148 
1149  nfds = GNUNET_MIN (fds1->nsds,
1150  fds2->nsds);
1151  while (nfds > 0)
1152  {
1153  nfds--;
1154  if ((FD_ISSET (nfds,
1155  &fds1->sds)) &&
1156  (FD_ISSET (nfds,
1157  &fds2->sds)))
1158  return GNUNET_YES;
1159  }
1160  return GNUNET_NO;
1161 }
#define GNUNET_MIN(a, b)

References GNUNET_MIN, GNUNET_NO, GNUNET_YES, GNUNET_NETWORK_FDSet::nsds, and GNUNET_NETWORK_FDSet::sds.

◆ GNUNET_NETWORK_fdset_create()

struct GNUNET_NETWORK_FDSet* GNUNET_NETWORK_fdset_create ( void  )

Creates an fd set.

Returns
a new fd set

Definition at line 1170 of file network.c.

1171 {
1172  struct GNUNET_NETWORK_FDSet *fds;
1173 
1174  fds = GNUNET_new (struct GNUNET_NETWORK_FDSet);
1176  return fds;
1177 }
void GNUNET_NETWORK_fdset_zero(struct GNUNET_NETWORK_FDSet *fds)
Reset FD set.
Definition: network.c:917
collection of IO descriptors

References GNUNET_NETWORK_fdset_zero(), and GNUNET_new.

Referenced by client_schedule(), context_task(), curl_download_prepare(), download_prepare(), GNUNET_SCHEDULER_driver_init(), GNUNET_SERVER_resume(), listen_stdio(), main(), prepare_daemon(), run_httpd(), schedule_httpd(), schedule_read(), select_loop(), and server_schedule().

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◆ GNUNET_NETWORK_fdset_destroy()

void GNUNET_NETWORK_fdset_destroy ( struct GNUNET_NETWORK_FDSet fds)

Releases the associated memory of an fd set.

Parameters
fdsfd set

Definition at line 1186 of file network.c.

1187 {
1188  GNUNET_free (fds);
1189 }

References GNUNET_free.

Referenced by client_schedule(), context_task(), curl_download_prepare(), download_prepare(), GNUNET_SCHEDULER_driver_done(), GNUNET_SERVER_resume(), listen_stdio(), prepare_daemon(), run_httpd(), schedule_httpd(), schedule_read(), select_loop(), and server_schedule().

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◆ GNUNET_NETWORK_test_port_free()

int GNUNET_NETWORK_test_port_free ( int  ipproto,
uint16_t  port 
)

Test if the given port is available.

Parameters
ipprototransport protocol to test (e.g. IPPROTO_TCP)
portport number to test
Returns
GNUNET_OK if the port is available, GNUNET_NO if not

Definition at line 1200 of file network.c.

1202 {
1203  struct GNUNET_NETWORK_Handle *socket;
1204  int bind_status;
1205  int socktype;
1206  char open_port_str[6];
1207  struct addrinfo hint;
1208  struct addrinfo *ret;
1209  struct addrinfo *ai;
1210 
1211  GNUNET_snprintf (open_port_str,
1212  sizeof(open_port_str),
1213  "%u",
1214  (unsigned int) port);
1215  socktype = (IPPROTO_TCP == ipproto) ? SOCK_STREAM : SOCK_DGRAM;
1216  ret = NULL;
1217  memset (&hint, 0, sizeof(hint));
1218  hint.ai_family = AF_UNSPEC; /* IPv4 and IPv6 */
1219  hint.ai_socktype = socktype;
1220  hint.ai_protocol = ipproto;
1221  hint.ai_addrlen = 0;
1222  hint.ai_addr = NULL;
1223  hint.ai_canonname = NULL;
1224  hint.ai_next = NULL;
1225  hint.ai_flags = AI_PASSIVE | AI_NUMERICSERV; /* Wild card address */
1226  GNUNET_assert (0 == getaddrinfo (NULL,
1227  open_port_str,
1228  &hint,
1229  &ret));
1230  bind_status = GNUNET_NO;
1231  for (ai = ret; NULL != ai; ai = ai->ai_next)
1232  {
1233  socket = GNUNET_NETWORK_socket_create (ai->ai_family,
1234  ai->ai_socktype,
1235  ai->ai_protocol);
1236  if (NULL == socket)
1237  continue;
1238  bind_status = GNUNET_NETWORK_socket_bind (socket,
1239  ai->ai_addr,
1240  ai->ai_addrlen);
1241  GNUNET_NETWORK_socket_close (socket);
1242  if (GNUNET_OK != bind_status)
1243  break;
1244  }
1245  freeaddrinfo (ret);
1246  return bind_status;
1247 }
static uint16_t port
Port number.
Definition: gnunet-bcd.c:147
static struct GNUNET_TRANSPORT_AddressIdentifier * ai
Handle to the operation that publishes our address.
int GNUNET_snprintf(char *buf, size_t size, const char *format,...) __attribute__((format(printf
Like snprintf, just aborts if the buffer is of insufficient size.
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_close(struct GNUNET_NETWORK_Handle *desc)
Close a socket.
Definition: network.c:508
struct GNUNET_NETWORK_Handle * GNUNET_NETWORK_socket_create(int domain, int type, int protocol)
Create a new socket.
Definition: network.c:832
enum GNUNET_GenericReturnValue GNUNET_NETWORK_socket_bind(struct GNUNET_NETWORK_Handle *desc, const struct sockaddr *address, socklen_t address_len)
Bind a socket to a particular address.
Definition: network.c:439
#define AI_NUMERICSERV
AI_NUMERICSERV not defined in windows.
Definition: platform.h:218

References ai, AI_NUMERICSERV, GNUNET_assert, GNUNET_NETWORK_socket_bind(), GNUNET_NETWORK_socket_close(), GNUNET_NETWORK_socket_create(), GNUNET_NO, GNUNET_OK, GNUNET_snprintf(), port, and ret.

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