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-rw-r--r--erts/emulator/nifs/common/socket_util.c1658
1 files changed, 1658 insertions, 0 deletions
diff --git a/erts/emulator/nifs/common/socket_util.c b/erts/emulator/nifs/common/socket_util.c
new file mode 100644
index 0000000000..f6e4781977
--- /dev/null
+++ b/erts/emulator/nifs/common/socket_util.c
@@ -0,0 +1,1658 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2018-2019. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * %CopyrightEnd%
+ *
+ * ----------------------------------------------------------------------
+ * Purpose : Utility functions for the socket and net NIF(s).
+ * ----------------------------------------------------------------------
+ *
+ */
+
+#include <stdarg.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <time.h>
+#include <stddef.h>
+
+#include "socket_int.h"
+#include "sys.h"
+#include "socket_util.h"
+#include "socket_dbg.h"
+
+/* We don't have a "debug flag" to check here, so we
+ * should use the compile debug flag, whatever that is...
+ */
+
+// #define COMPILE_DEBUG_FLAG_WE_NEED_TO_CHECK 1
+#if defined(COMPILE_DEBUG_FLAG_WE_NEED_TO_CHECK)
+#define UTIL_DEBUG TRUE
+#else
+#define UTIL_DEBUG FALSE
+#endif
+
+#define UDBG( proto ) ESOCK_DBG_PRINTF( UTIL_DEBUG , proto )
+
+
+extern char* erl_errno_id(int error); /* THIS IS JUST TEMPORARY??? */
+
+static int realtime(struct timespec* tsP);
+static int timespec2str(char *buf, unsigned int len, struct timespec *ts);
+
+static char* make_sockaddr_in4(ErlNifEnv* env,
+ ERL_NIF_TERM port,
+ ERL_NIF_TERM addr,
+ ERL_NIF_TERM* sa);
+static char* make_sockaddr_in6(ErlNifEnv* env,
+ ERL_NIF_TERM port,
+ ERL_NIF_TERM addr,
+ ERL_NIF_TERM flowInfo,
+ ERL_NIF_TERM scopeId,
+ ERL_NIF_TERM* sa);
+static char* make_sockaddr_un(ErlNifEnv* env,
+ ERL_NIF_TERM path,
+ ERL_NIF_TERM* sa);
+
+
+/* +++ esock_encode_iov +++
+ *
+ * Encode an IO Vector. In erlang we represented this as a list of binaries.
+ *
+ * We iterate through the IO vector, and as long as the remaining (rem)
+ * number of bytes is greater than the size of the current buffer, we
+ * contunue. When we have a buffer that is greater than rem, we have found
+ * the last buffer (it may be empty, and then the previous was last).
+ * We may need to split this (if 0 < rem < bufferSz).
+ */
+
+extern
+char* esock_encode_iov(ErlNifEnv* env,
+ int read,
+ struct iovec* iov,
+ size_t len,
+ ErlNifBinary* data,
+ ERL_NIF_TERM* eIOV)
+{
+ int rem = read;
+ Uint16 i;
+ BOOLEAN_T done = FALSE;
+ ERL_NIF_TERM a[len]; // At most this length
+
+ UDBG( ("SUTIL", "esock_encode_iov -> entry with"
+ "\r\n read: %d"
+ "\r\n (IOV) len: %d"
+ "\r\n", read, len) );
+
+ if (len == 0) {
+ *eIOV = MKEL(env);
+ return NULL;
+ }
+
+ for (i = 0; (!done) && (i < len); i++) {
+ UDBG( ("SUTIL", "esock_encode_iov -> process iov:"
+ "\r\n iov[%d].iov_len: %d"
+ "\r\n rem: %d"
+ "\r\n", i, iov[i].iov_len, rem) );
+ if (iov[i].iov_len == rem) {
+ /* We have the exact amount - we are done */
+ UDBG( ("SUTIL", "esock_encode_iov -> exact => done\r\n") );
+ a[i] = MKBIN(env, &data[i]);
+ rem = 0; // Besserwisser
+ done = TRUE;
+ } else if (iov[i].iov_len < rem) {
+ /* Filled another buffer - continue */
+ UDBG( ("SUTIL", "esock_encode_iov -> filled => continue\r\n") );
+ a[i] = MKBIN(env, &data[i]);
+ rem -= iov[i].iov_len;
+ } else if (iov[i].iov_len > rem) {
+ /* Partly filled buffer (=> split) - we are done */
+ ERL_NIF_TERM tmp;
+ UDBG( ("SUTIL", "esock_encode_iov -> split => done\r\n") );
+ tmp = MKBIN(env, &data[i]);
+ a[i] = MKSBIN(env, tmp, 0, rem);
+ rem = 0; // Besserwisser
+ done = TRUE;
+ }
+ }
+
+ UDBG( ("SUTIL", "esock_encode_iov -> create the IOV list (%d)\r\n", i) );
+
+ *eIOV = MKLA(env, a, i);
+
+ UDBG( ("SUTIL", "esock_encode_msghdr -> done\r\n") );
+
+ return NULL;
+}
+
+
+
+/* +++ esock_decode_iov +++
+ *
+ * Decode an IO Vector. In erlang we represented this as a list of binaries.
+ *
+ * We assume that we have already figured out how long the iov (actually
+ * eIOV) is (len), and therefor allocated an array of bins and iov to be
+ * used.
+ */
+
+extern
+char* esock_decode_iov(ErlNifEnv* env,
+ ERL_NIF_TERM eIOV,
+ ErlNifBinary* bufs,
+ struct iovec* iov,
+ size_t len,
+ ssize_t* totSize)
+{
+ Uint16 i;
+ ssize_t sz;
+ ERL_NIF_TERM elem, tail, list;
+
+ UDBG( ("SUTIL", "esock_decode_iov -> entry with"
+ "\r\n (IOV) len: %d"
+ "\r\n", read, len) );
+
+ for (i = 0, list = eIOV, sz = 0; (i < len); i++) {
+
+ UDBG( ("SUTIL", "esock_decode_iov -> "
+ "\r\n iov[%d].iov_len: %d"
+ "\r\n rem: %d"
+ "\r\n", i) );
+
+ if (!GET_LIST_ELEM(env, list, &elem, &tail))
+ return ESOCK_STR_EINVAL;
+
+ if (IS_BIN(env, elem) && GET_BIN(env, elem, &bufs[i])) {
+ iov[i].iov_base = bufs[i].data;
+ iov[i].iov_len = bufs[i].size;
+ sz += bufs[i].size;
+ } else {
+ return ESOCK_STR_EINVAL;
+ }
+
+ list = tail;
+ }
+
+ *totSize = sz;
+
+ UDBG( ("SUTIL", "esock_decode_msghdr -> done (%d)\r\n", sz) );
+
+ return NULL;
+}
+
+
+
+/* +++ esock_decode_sockaddr +++
+ *
+ * Decode a socket address - sockaddr. In erlang its represented as
+ * a map, which has a specific set of attributes, depending on one
+ * mandatory attribute; family. So depending on the value of the family
+ * attribute:
+ *
+ * local - sockaddr_un: path
+ * inet - sockaddr_in4: port, addr
+ * inet6 - sockaddr_in6: port, addr, flowinfo, scope_id
+ */
+
+extern
+char* esock_decode_sockaddr(ErlNifEnv* env,
+ ERL_NIF_TERM eSockAddr,
+ SocketAddress* sockAddrP,
+ unsigned int* addrLen)
+{
+ ERL_NIF_TERM efam;
+ int fam;
+ char* xres;
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr -> entry\r\n") );
+
+ if (!IS_MAP(env, eSockAddr))
+ return ESOCK_STR_EINVAL;
+
+ if (!GET_MAP_VAL(env, eSockAddr, esock_atom_family, &efam))
+ return ESOCK_STR_EINVAL;
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr -> try decode domain (%T)\r\n", efam) );
+ if ((xres = esock_decode_domain(env, efam, &fam)) != NULL)
+ return xres;
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr -> fam: %d\r\n", fam) );
+ switch (fam) {
+ case AF_INET:
+ xres = esock_decode_sockaddr_in4(env, eSockAddr,
+ &sockAddrP->in4, addrLen);
+ break;
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ case AF_INET6:
+ xres = esock_decode_sockaddr_in6(env, eSockAddr,
+ &sockAddrP->in6, addrLen);
+ break;
+#endif
+
+#ifdef HAVE_SYS_UN_H
+ case AF_UNIX:
+ xres = esock_decode_sockaddr_un(env, eSockAddr,
+ &sockAddrP->un, addrLen);
+ break;
+#endif
+
+ default:
+ xres = ESOCK_STR_EAFNOSUPPORT;
+ break;
+
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_encode_sockaddr +++
+ *
+ * Encode a socket address - sockaddr. In erlang its represented as
+ * a map, which has a specific set of attributes, depending on one
+ * mandatory attribute; family. So depending on the value of the family
+ * attribute:
+ *
+ * local - sockaddr_un: path
+ * inet - sockaddr_in4: port, addr
+ * inet6 - sockaddr_in6: port, addr, flowinfo, scope_id
+ */
+
+extern
+char* esock_encode_sockaddr(ErlNifEnv* env,
+ SocketAddress* sockAddrP,
+ unsigned int addrLen,
+ ERL_NIF_TERM* eSockAddr)
+{
+ char* xres;
+
+ UDBG( ("SUTIL", "esock_encode_sockaddr -> entry with"
+ "\r\n family: %d"
+ "\r\n addrLen: %d"
+ "\r\n", sockAddrP->sa.sa_family, addrLen) );
+
+ switch (sockAddrP->sa.sa_family) {
+ case AF_INET:
+ xres = esock_encode_sockaddr_in4(env, &sockAddrP->in4, addrLen, eSockAddr);
+ break;
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ case AF_INET6:
+ xres = esock_encode_sockaddr_in6(env, &sockAddrP->in6, addrLen, eSockAddr);
+ break;
+#endif
+
+#ifdef HAVE_SYS_UN_H
+ case AF_UNIX:
+ xres = esock_encode_sockaddr_un(env, &sockAddrP->un, addrLen, eSockAddr);
+ break;
+#endif
+
+ default:
+ *eSockAddr = esock_atom_undefined;
+ xres = ESOCK_STR_EAFNOSUPPORT;
+ break;
+
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_decode_sockaddr_in4 +++
+ *
+ * Decode a IPv4 socket address - sockaddr_in4. In erlang its represented as
+ * a map, which has a specific set of attributes (beside the mandatory family
+ * attribute, which is "inherited" from the "sockaddr" type):
+ *
+ * port :: port_numbber()
+ * addr :: ip4_address()
+ *
+ * The erlang module ensures that both of these has values exist, so there
+ * is no need for any elaborate error handling.
+ */
+
+extern
+char* esock_decode_sockaddr_in4(ErlNifEnv* env,
+ ERL_NIF_TERM eSockAddr,
+ struct sockaddr_in* sockAddrP,
+ unsigned int* addrLen)
+{
+ ERL_NIF_TERM eport, eaddr;
+ int port;
+ char* xres;
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in4 -> entry\r\n") );
+
+ /* Basic init */
+ sys_memzero((char*) sockAddrP, sizeof(struct sockaddr_in));
+
+#ifndef NO_SA_LEN
+ sockAddrP->sin_len = sizeof(struct sockaddr_in);
+#endif
+
+ sockAddrP->sin_family = AF_INET;
+
+ /* Extract (e) port number from map */
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in4 -> try get port number\r\n") );
+ if (!GET_MAP_VAL(env, eSockAddr, esock_atom_port, &eport))
+ return ESOCK_STR_EINVAL;
+
+ /* Decode port number */
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in4 -> try decode port number\r\n") );
+ if (!GET_INT(env, eport, &port))
+ return ESOCK_STR_EINVAL;
+
+ sockAddrP->sin_port = htons(port);
+
+ /* Extract (e) address from map */
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in4 -> try get (ip) address\r\n") );
+ if (!GET_MAP_VAL(env, eSockAddr, esock_atom_addr, &eaddr))
+ return ESOCK_STR_EINVAL;
+
+ /* Decode address */
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in4 -> try decode (ip) address\r\n") );
+ if ((xres = esock_decode_ip4_address(env,
+ eaddr,
+ &sockAddrP->sin_addr)) != NULL)
+ return xres;
+
+ *addrLen = sizeof(struct sockaddr_in);
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in4 -> done\r\n") );
+
+ return NULL;
+}
+
+
+
+/* +++ esock_encode_sockaddr_in4 +++
+ *
+ * Encode a IPv4 socket address - sockaddr_in4. In erlang its represented as
+ * a map, which has a specific set of attributes (beside the mandatory family
+ * attribute, which is "inherited" from the "sockaddr" type):
+ *
+ * port :: port_numbber()
+ * addr :: ip4_address()
+ *
+ */
+
+extern
+char* esock_encode_sockaddr_in4(ErlNifEnv* env,
+ struct sockaddr_in* sockAddrP,
+ unsigned int addrLen,
+ ERL_NIF_TERM* eSockAddr)
+{
+ ERL_NIF_TERM ePort, eAddr;
+ int port;
+ char* xres = NULL;
+
+ UDBG( ("SUTIL", "esock_encode_sockaddr_in4 -> entry\r\n") );
+
+ if (addrLen >= sizeof(struct sockaddr_in)) {
+ /* The port */
+ port = ntohs(sockAddrP->sin_port);
+ ePort = MKI(env, port);
+
+ /* The address */
+ if ((xres = esock_encode_ip4_address(env, &sockAddrP->sin_addr,
+ &eAddr)) == NULL) {
+ /* And finally construct the in4_sockaddr record */
+ xres = make_sockaddr_in4(env, ePort, eAddr, eSockAddr);
+ } else {
+ UDBG( ("SUTIL", "esock_encode_sockaddr_in4 -> "
+ "failed encoding (ip) address: "
+ "\r\n xres: %s"
+ "\r\n", xres) );
+ *eSockAddr = esock_atom_undefined;
+ xres = ESOCK_STR_EINVAL;
+ }
+
+ } else {
+ UDBG( ("SUTIL", "esock_encode_sockaddr_in4 -> wrong size: "
+ "\r\n addrLen: %d"
+ "\r\n addr size: %d"
+ "\r\n", addrLen, sizeof(struct sockaddr_in)) );
+ *eSockAddr = esock_atom_undefined;
+ xres = ESOCK_STR_EINVAL;
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_decode_sockaddr_in6 +++
+ *
+ * Decode a IPv6 socket address - sockaddr_in6. In erlang its represented as
+ * a map, which has a specific set of attributes (beside the mandatory family
+ * attribute, which is "inherited" from the "sockaddr" type):
+ *
+ * port :: port_numbber() (integer)
+ * addr :: ip6_address() (tuple)
+ * flowinfo :: in6_flow_info() (integer)
+ * scope_id :: in6_scope_id() (integer)
+ *
+ * The erlang module ensures that all of these has values exist, so there
+ * is no need for any elaborate error handling here.
+ */
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+extern
+char* esock_decode_sockaddr_in6(ErlNifEnv* env,
+ ERL_NIF_TERM eSockAddr,
+ struct sockaddr_in6* sockAddrP,
+ unsigned int* addrLen)
+{
+ ERL_NIF_TERM eport, eaddr, eflowInfo, escopeId;
+ int port;
+ unsigned int flowInfo, scopeId;
+ char* xres;
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in6 -> entry\r\n") );
+
+ /* Basic init */
+ sys_memzero((char*) sockAddrP, sizeof(struct sockaddr_in6));
+#ifndef NO_SA_LEN
+ sockAddrP->sin6_len = sizeof(struct sockaddr_in);
+#endif
+
+ sockAddrP->sin6_family = AF_INET6;
+
+ /* *** Extract (e) port number from map *** */
+ if (!GET_MAP_VAL(env, eSockAddr, esock_atom_port, &eport))
+ return ESOCK_STR_EINVAL;
+
+ /* Decode port number */
+ if (!GET_INT(env, eport, &port))
+ return ESOCK_STR_EINVAL;
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in6 -> port: %d\r\n", port) );
+
+ sockAddrP->sin6_port = htons(port);
+
+ /* *** Extract (e) flowinfo from map *** */
+ if (!GET_MAP_VAL(env, eSockAddr, esock_atom_flowinfo, &eflowInfo))
+ return ESOCK_STR_EINVAL;
+
+ /* 4: Get the flowinfo */
+ if (!GET_UINT(env, eflowInfo, &flowInfo))
+ return ESOCK_STR_EINVAL;
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in6 -> flowinfo: %d\r\n", flowInfo) );
+
+ sockAddrP->sin6_flowinfo = flowInfo;
+
+ /* *** Extract (e) scope_id from map *** */
+ if (!GET_MAP_VAL(env, eSockAddr, esock_atom_scope_id, &escopeId))
+ return ESOCK_STR_EINVAL;
+
+ /* *** Get the scope_id *** */
+ if (!GET_UINT(env, escopeId, &scopeId))
+ return ESOCK_STR_EINVAL;
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in6 -> scopeId: %d\r\n", scopeId) );
+
+ sockAddrP->sin6_scope_id = scopeId;
+
+ /* *** Extract (e) address from map *** */
+ if (!GET_MAP_VAL(env, eSockAddr, esock_atom_addr, &eaddr))
+ return ESOCK_STR_EINVAL;
+
+ /* Decode address */
+ if ((xres = esock_decode_ip6_address(env,
+ eaddr,
+ &sockAddrP->sin6_addr)) != NULL)
+ return xres;
+
+ *addrLen = sizeof(struct sockaddr_in6);
+
+ UDBG( ("SUTIL", "esock_decode_sockaddr_in6 -> done\r\n") );
+
+ return NULL;
+}
+#endif
+
+
+
+/* +++ esock_encode_sockaddr_in6 +++
+ *
+ * Encode a IPv6 socket address - sockaddr_in6. In erlang its represented as
+ * a map, which has a specific set of attributes (beside the mandatory family
+ * attribute, which is "inherited" from the "sockaddr" type):
+ *
+ * port :: port_numbber() (integer)
+ * addr :: ip6_address() (tuple)
+ * flowinfo :: in6_flow_info() (integer)
+ * scope_id :: in6_scope_id() (integer)
+ *
+ */
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+extern
+char* esock_encode_sockaddr_in6(ErlNifEnv* env,
+ struct sockaddr_in6* sockAddrP,
+ unsigned int addrLen,
+ ERL_NIF_TERM* eSockAddr)
+{
+ ERL_NIF_TERM ePort, eAddr, eFlowInfo, eScopeId;
+ char* xres;
+
+ if (addrLen >= sizeof(struct sockaddr_in6)) {
+ /* The port */
+ ePort = MKI(env, ntohs(sockAddrP->sin6_port));
+
+ /* The flowInfo */
+ eFlowInfo = MKI(env, sockAddrP->sin6_flowinfo);
+
+ /* The scopeId */
+ eScopeId = MKI(env, sockAddrP->sin6_scope_id);
+
+ /* The address */
+ if ((xres = esock_encode_ip6_address(env, &sockAddrP->sin6_addr,
+ &eAddr)) == NULL) {
+ /* And finally construct the in6_sockaddr record */
+ xres = make_sockaddr_in6(env,
+ ePort, eAddr, eFlowInfo, eScopeId, eSockAddr);
+ } else {
+ *eSockAddr = esock_atom_undefined;
+ xres = ESOCK_STR_EINVAL;
+ }
+
+ } else {
+ *eSockAddr = esock_atom_undefined;
+ xres = ESOCK_STR_EINVAL;
+ }
+
+ return xres;
+}
+#endif
+
+
+
+/* +++ esock_decode_sockaddr_un +++
+ *
+ * Decode a Unix Domain socket address - sockaddr_un. In erlang its
+ * represented as a map, which has a specific set of attributes
+ * (beside the mandatory family attribute, which is "inherited" from
+ * the "sockaddr" type):
+ *
+ * path :: binary()
+ *
+ * The erlang module ensures that this value exist, so there
+ * is no need for any elaborate error handling here.
+ */
+
+#ifdef HAVE_SYS_UN_H
+extern
+char* esock_decode_sockaddr_un(ErlNifEnv* env,
+ ERL_NIF_TERM eSockAddr,
+ struct sockaddr_un* sockAddrP,
+ unsigned int* addrLen)
+{
+ ErlNifBinary bin;
+ ERL_NIF_TERM epath;
+ unsigned int len;
+
+ /* *** Extract (e) path (a binary) from map *** */
+ if (!GET_MAP_VAL(env, eSockAddr, esock_atom_path, &epath))
+ return ESOCK_STR_EINVAL;
+
+ /* Get the path */
+ if (!GET_BIN(env, epath, &bin))
+ return ESOCK_STR_EINVAL;
+
+ if ((bin.size +
+#ifdef __linux__
+ /* Make sure the address gets zero terminated
+ * except when the first byte is \0 because then it is
+ * sort of zero terminated although the zero termination
+ * comes before the address...
+ * This fix handles Linux's nonportable
+ * abstract socket address extension.
+ */
+ (bin.data[0] == '\0' ? 0 : 1)
+#else
+ 1
+#endif
+ ) > sizeof(sockAddrP->sun_path))
+ return ESOCK_STR_EINVAL;
+
+
+ sys_memzero((char*) sockAddrP, sizeof(struct sockaddr_un));
+ sockAddrP->sun_family = AF_UNIX;
+
+ sys_memcpy(sockAddrP->sun_path, bin.data, bin.size);
+ len = offsetof(struct sockaddr_un, sun_path) + bin.size;
+
+#ifndef NO_SA_LEN
+ sockAddrP->sun_len = len;
+#endif
+ *addrLen = len;
+
+ return NULL;
+}
+#endif
+
+
+
+/* +++ esock_encode_sockaddr_un +++
+ *
+ * Encode a Unix Domain socket address - sockaddr_un. In erlang its
+ * represented as a map, which has a specific set of attributes
+ * (beside the mandatory family attribute, which is "inherited" from
+ * the "sockaddr" type):
+ *
+ * path :: binary()
+ *
+ */
+
+#ifdef HAVE_SYS_UN_H
+extern
+char* esock_encode_sockaddr_un(ErlNifEnv* env,
+ struct sockaddr_un* sockAddrP,
+ unsigned int addrLen,
+ ERL_NIF_TERM* eSockAddr)
+{
+ ERL_NIF_TERM ePath;
+ size_t n, m;
+ char* xres;
+
+ if (addrLen >= offsetof(struct sockaddr_un, sun_path)) {
+ n = addrLen - offsetof(struct sockaddr_un, sun_path);
+ if (255 < n) {
+ *eSockAddr = esock_atom_undefined;
+ xres = ESOCK_STR_EINVAL;
+ } else {
+ m = esock_strnlen(sockAddrP->sun_path, n);
+#ifdef __linux__
+ /* Assume that the address is a zero terminated string,
+ * except when the first byte is \0 i.e the string length is 0,
+ * then use the reported length instead.
+ * This fix handles Linux's nonportable
+ * abstract socket address extension.
+ */
+ if (m == 0) {
+ m = n;
+ }
+#endif
+
+ /* And finally build the 'path' attribute */
+ ePath = MKSL(env, sockAddrP->sun_path, m);
+
+ /* And the socket address */
+ xres = make_sockaddr_un(env, ePath, eSockAddr);
+ }
+ } else {
+ *eSockAddr = esock_atom_undefined;
+ xres = ESOCK_STR_EINVAL;
+ }
+
+ return xres;
+}
+#endif
+
+
+
+/* +++ esock_decode_ip4_address +++
+ *
+ * Decode a IPv4 address. This can be three things:
+ *
+ * + Then atom 'any'
+ * + Then atom 'loopback'
+ * + An ip4_address() (4 tuple)
+ *
+ * Note that this *only* decodes the "address" part of a
+ * (IPv4) socket address.
+ */
+
+extern
+char* esock_decode_ip4_address(ErlNifEnv* env,
+ ERL_NIF_TERM eAddr,
+ struct in_addr* inAddrP)
+{
+ struct in_addr addr;
+
+ UDBG( ("SUTIL", "esock_decode_ip4_address -> entry with"
+ "\r\n eAddr: %T"
+ "\r\n", eAddr) );
+
+ if (IS_ATOM(env, eAddr)) {
+ /* This is either 'any' or 'loopback' */
+
+ if (COMPARE(esock_atom_loopback, eAddr) == 0) {
+ UDBG( ("SUTIL", "esock_decode_ip4_address -> address: lookback\r\n") );
+ addr.s_addr = htonl(INADDR_LOOPBACK);
+ } else if (COMPARE(esock_atom_any, eAddr) == 0) {
+ UDBG( ("SUTIL", "esock_decode_ip4_address -> address: any\r\n") );
+ addr.s_addr = htonl(INADDR_ANY);
+ } else {
+ UDBG( ("SUTIL", "esock_decode_ip4_address -> address: unknown\r\n") );
+ return ESOCK_STR_EINVAL;
+ }
+
+ inAddrP->s_addr = addr.s_addr;
+
+ } else {
+ /* This is a 4-tuple */
+
+ const ERL_NIF_TERM* addrt;
+ int addrtSz;
+ int a, v;
+ char addr[4];
+
+ if (!GET_TUPLE(env, eAddr, &addrtSz, &addrt))
+ return ESOCK_STR_EINVAL;
+
+ if (addrtSz != 4)
+ return ESOCK_STR_EINVAL;
+
+ for (a = 0; a < 4; a++) {
+ if (!GET_INT(env, addrt[a], &v))
+ return ESOCK_STR_EINVAL;
+ addr[a] = v;
+ }
+
+ sys_memcpy(inAddrP, &addr, sizeof(addr));
+
+ }
+
+ return NULL;
+}
+
+
+
+/* +++ esock_encode_ip4_address +++
+ *
+ * Encode a IPv4 address:
+ *
+ * + An ip4_address() (4 tuple)
+ *
+ * Note that this *only* decodes the "address" part of a
+ * (IPv4) socket address. There are several other things (port).
+ */
+
+extern
+char* esock_encode_ip4_address(ErlNifEnv* env,
+ struct in_addr* addrP,
+ ERL_NIF_TERM* eAddr)
+{
+ unsigned int i;
+ ERL_NIF_TERM at[4];
+ unsigned int atLen = sizeof(at) / sizeof(ERL_NIF_TERM);
+ unsigned char* a = (unsigned char*) addrP;
+ ERL_NIF_TERM addr;
+
+ /* The address */
+ for (i = 0; i < atLen; i++) {
+ at[i] = MKI(env, a[i]);
+ }
+
+ addr = MKTA(env, at, atLen);
+ UDBG( ("SUTIL", "esock_encode_ip4_address -> addr: %T\r\n", addr) );
+ // *eAddr = MKTA(env, at, atLen);
+ *eAddr = addr;
+
+ return NULL;
+}
+
+
+
+/* +++ esock_decode_ip6_address +++
+ *
+ * Decode a IPv6 address. This can be three things:
+ *
+ * + Then atom 'any'
+ * + Then atom 'loopback'
+ * + An ip6_address() (8 tuple)
+ *
+ * Note that this *only* decodes the "address" part of a
+ * (IPv6) socket address. There are several other things
+ * (port, flowinfo and scope_id) that are handled elsewhere).
+ */
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+extern
+char* esock_decode_ip6_address(ErlNifEnv* env,
+ ERL_NIF_TERM eAddr,
+ struct in6_addr* inAddrP)
+{
+ UDBG( ("SUTIL", "esock_decode_ip6_address -> entry with"
+ "\r\n eAddr: %T"
+ "\r\n", eAddr) );
+
+ if (IS_ATOM(env, eAddr)) {
+ /* This is either 'any' or 'loopback' */
+ const struct in6_addr* addr;
+
+ if (COMPARE(esock_atom_loopback, eAddr) == 0) {
+ addr = &in6addr_loopback;
+ } else if (COMPARE(esock_atom_any, eAddr) == 0) {
+ addr = &in6addr_any;
+ } else {
+ return ESOCK_STR_EINVAL;
+ }
+
+ *inAddrP = *addr;
+
+ } else {
+ /* This is a 8-tuple */
+
+ const ERL_NIF_TERM* addrt;
+ int addrtSz;
+ int ai, v;
+ unsigned char addr[16];
+ unsigned char* a = addr;
+ unsigned int addrLen = sizeof(addr) / sizeof(unsigned char);
+
+ if (!GET_TUPLE(env, eAddr, &addrtSz, &addrt))
+ return ESOCK_STR_EINVAL;
+
+ if (addrtSz != 8)
+ return ESOCK_STR_EINVAL;
+
+ for (ai = 0; ai < 8; ai++) {
+ if (!GET_INT(env, addrt[ai], &v))
+ return ESOCK_STR_EINVAL;
+ put_int16(v, a);
+ a += 2;
+ }
+
+ sys_memcpy(inAddrP, &addr, addrLen);
+
+ }
+
+ return NULL;
+}
+#endif
+
+
+
+/* +++ esock_encode_ip6_address +++
+ *
+ * Encode a IPv6 address:
+ *
+ * + An ip6_address() (8 tuple)
+ *
+ * Note that this *only* encodes the "address" part of a
+ * (IPv6) socket address. There are several other things
+ * (port, flowinfo and scope_id) that are handled elsewhere).
+ */
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+extern
+char* esock_encode_ip6_address(ErlNifEnv* env,
+ struct in6_addr* addrP,
+ ERL_NIF_TERM* eAddr)
+{
+ unsigned int i;
+ ERL_NIF_TERM at[8];
+ unsigned int atLen = sizeof(at) / sizeof(ERL_NIF_TERM);
+ unsigned char* a = (unsigned char*) addrP;
+
+ /* The address */
+ for (i = 0; i < atLen; i++) {
+ at[i] = MKI(env, get_int16(a + i*2));
+ }
+
+ *eAddr = MKTA(env, at, atLen);
+
+ return NULL;
+}
+#endif
+
+
+
+/* +++ esock_encode_timeval +++
+ *
+ * Encode a timeval struct into its erlang form, a map with two fields:
+ *
+ * sec
+ * usec
+ *
+ */
+extern
+char* esock_encode_timeval(ErlNifEnv* env,
+ struct timeval* timeP,
+ ERL_NIF_TERM* eTime)
+{
+ ERL_NIF_TERM keys[] = {esock_atom_sec, esock_atom_usec};
+ ERL_NIF_TERM vals[] = {MKL(env, timeP->tv_sec), MKL(env, timeP->tv_usec)};
+
+ unsigned int numKeys = sizeof(keys) / sizeof(ERL_NIF_TERM);
+ unsigned int numVals = sizeof(vals) / sizeof(ERL_NIF_TERM);
+
+ ESOCK_ASSERT( (numKeys == numVals) );
+
+ if (!MKMA(env, keys, vals, numKeys, eTime))
+ return ESOCK_STR_EINVAL;
+
+ return NULL;
+}
+
+
+
+/* +++ esock_decode_timeval +++
+ *
+ * Decode a timeval in its erlang form (a map) into its native form,
+ * a timeval struct.
+ *
+ */
+extern
+char* esock_decode_timeval(ErlNifEnv* env,
+ ERL_NIF_TERM eTime,
+ struct timeval* timeP)
+{
+ ERL_NIF_TERM eSec, eUSec;
+ size_t sz;
+
+ // It must be a map
+ if (!IS_MAP(env, eTime))
+ return ESOCK_STR_EINVAL;
+
+ // It must have atleast two attributes
+ if (!enif_get_map_size(env, eTime, &sz) || (sz < 2))
+ return ESOCK_STR_EINVAL;
+
+ if (!GET_MAP_VAL(env, eTime, esock_atom_sec, &eSec))
+ return ESOCK_STR_EINVAL;
+
+ if (!GET_MAP_VAL(env, eTime, esock_atom_usec, &eUSec))
+ return ESOCK_STR_EINVAL;
+
+ if (!GET_LONG(env, eSec, &timeP->tv_sec))
+ return ESOCK_STR_EINVAL;
+
+ if (!GET_LONG(env, eUSec, &timeP->tv_usec))
+ return ESOCK_STR_EINVAL;
+
+ return NULL;
+}
+
+
+
+/* +++ esock_decode_domain +++
+ *
+ * Decode the Erlang form of the 'domain' type, that is:
+ *
+ * inet => AF_INET
+ * inet6 => AF_INET6
+ * local => AF_UNIX
+ *
+ */
+extern
+char* esock_decode_domain(ErlNifEnv* env,
+ ERL_NIF_TERM eDomain,
+ int* domain)
+{
+ char* xres = NULL;
+
+ if (COMPARE(esock_atom_inet, eDomain) == 0) {
+ *domain = AF_INET;
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ } else if (COMPARE(esock_atom_inet6, eDomain) == 0) {
+ *domain = AF_INET6;
+#endif
+
+#ifdef HAVE_SYS_UN_H
+ } else if (COMPARE(esock_atom_local, eDomain) == 0) {
+ *domain = AF_UNIX;
+#endif
+
+ } else {
+ *domain = -1;
+ xres = ESOCK_STR_EAFNOSUPPORT;
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_encode_domain +++
+ *
+ * Encode the native domain to the Erlang form, that is:
+ *
+ * AF_INET => inet
+ * AF_INET6 => inet6
+ * AF_UNIX => local
+ *
+ */
+extern
+char* esock_encode_domain(ErlNifEnv* env,
+ int domain,
+ ERL_NIF_TERM* eDomain)
+{
+ char* xres = NULL;
+
+ switch (domain) {
+ case AF_INET:
+ *eDomain = esock_atom_inet;
+ break;
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ case AF_INET6:
+ *eDomain = esock_atom_inet6;
+ break;
+#endif
+
+#ifdef HAVE_SYS_UN_H
+ case AF_UNIX:
+ *eDomain = esock_atom_local;
+ break;
+#endif
+
+ default:
+ *eDomain = esock_atom_undefined; // Just in case
+ xres = ESOCK_STR_EAFNOSUPPORT;
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_decode_type +++
+ *
+ * Decode the Erlang form of the 'type' type, that is:
+ *
+ * stream => SOCK_STREAM
+ * dgram => SOCK_DGRAM
+ * raw => SOCK_RAW
+ * seqpacket => SOCK_SEQPACKET
+ *
+ */
+extern
+char* esock_decode_type(ErlNifEnv* env,
+ ERL_NIF_TERM eType,
+ int* type)
+{
+ char* xres = NULL;
+
+ if (COMPARE(esock_atom_stream, eType) == 0) {
+ *type = SOCK_STREAM;
+ } else if (COMPARE(esock_atom_dgram, eType) == 0) {
+ *type = SOCK_DGRAM;
+ } else if (COMPARE(esock_atom_raw, eType) == 0) {
+ *type = SOCK_RAW;
+
+#if defined(HAVE_SCTP)
+ } else if (COMPARE(esock_atom_seqpacket, eType) == 0) {
+ *type = SOCK_SEQPACKET;
+#endif
+
+ } else {
+ *type = -1;
+ xres = ESOCK_STR_EAFNOSUPPORT;
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_decode_type +++
+ *
+ * Encode the native type to the Erlang form, that is:
+ *
+ * SOCK_STREAM => stream
+ * SOCK_DGRAM => dgram
+ * SOCK_RAW => raw
+ * SOCK_SEQPACKET => seqpacket
+ *
+ */
+extern
+char* esock_encode_type(ErlNifEnv* env,
+ int type,
+ ERL_NIF_TERM* eType)
+{
+ char* xres = NULL;
+
+ switch (type) {
+ case SOCK_STREAM:
+ *eType = esock_atom_stream;
+ break;
+
+ case SOCK_DGRAM:
+ *eType = esock_atom_dgram;
+ break;
+
+ case SOCK_RAW:
+ *eType = esock_atom_raw;
+ break;
+
+#if defined(HAVE_SCTP)
+ case SOCK_SEQPACKET:
+ *eType = esock_atom_seqpacket;
+ break;
+#endif
+
+ default:
+ *eType = esock_atom_undefined; // Just in case
+ xres = ESOCK_STR_EAFNOSUPPORT;
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_encode_protocol +++
+ *
+ * Encode the native protocol to the Erlang form, that is:
+ *
+ * SOL_IP | IPPROTO_IP => ip
+ * SOL_IPV6 => ipv6
+ * SOL_TCP => tcp
+ * SOL_UDP => udp
+ * SOL_SCTP => sctp
+ *
+ */
+extern
+char* esock_encode_protocol(ErlNifEnv* env,
+ int proto,
+ ERL_NIF_TERM* eProto)
+{
+ char* xres = NULL;
+
+ switch (proto) {
+#if defined(SOL_IP)
+ case SOL_IP:
+#else
+ case IPPROTO_IP:
+#endif
+ *eProto = esock_atom_ip;
+ break;
+
+#if defined(SOL_IPV6)
+ case SOL_IPV6:
+ *eProto = esock_atom_ipv6;
+ break;
+#endif
+
+ case IPPROTO_TCP:
+ *eProto = esock_atom_tcp;
+ break;
+
+ case IPPROTO_UDP:
+ *eProto = esock_atom_udp;
+ break;
+
+#if defined(HAVE_SCTP)
+ case IPPROTO_SCTP:
+ *eProto = esock_atom_sctp;
+ break;
+#endif
+
+ default:
+ *eProto = esock_atom_undefined;
+ xres = ESOCK_STR_EAFNOSUPPORT;
+ break;
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_decode_protocol +++
+ *
+ * Decode the Erlang form of the 'protocol' type, that is:
+ *
+ * ip => SOL_IP | IPPROTO_IP
+ * ipv6 => SOL_IPV6
+ * tcp => SOL_TCP
+ * udp => SOL_UDP
+ * sctp => SOL_SCTP
+ *
+ */
+extern
+char* esock_decode_protocol(ErlNifEnv* env,
+ ERL_NIF_TERM eProto,
+ int* proto)
+{
+ char* xres = NULL;
+
+ if (COMPARE(esock_atom_ip, eProto) == 0) {
+#if defined(SOL_IP)
+ *proto = SOL_IP;
+#else
+ *proto = IPPROTO_IP;
+#endif
+ } else if (COMPARE(esock_atom_ipv6, eProto) == 0) {
+#if defined(SOL_IPV6)
+ *proto = SOL_IPV6;
+#else
+ *proto = IPPROTO_IPV6;
+#endif
+ } else if (COMPARE(esock_atom_tcp, eProto) == 0) {
+ *proto = IPPROTO_TCP;
+ } else if (COMPARE(esock_atom_udp, eProto) == 0) {
+ *proto = IPPROTO_UDP;
+#if defined(HAVE_SCTP)
+ } else if (COMPARE(esock_atom_sctp, eProto) == 0) {
+ *proto = IPPROTO_SCTP;
+#endif
+ } else {
+ *proto = -1;
+ xres = ESOCK_STR_EAFNOSUPPORT;
+ }
+
+ return xres;
+}
+
+
+
+/* +++ esock_decode_bufsz +++
+ *
+ * Decode an buffer size. The size of a buffer is:
+ *
+ * Sz > 0 => Use provided value
+ * Sz => Use provided default
+ *
+ */
+extern
+char* esock_decode_bufsz(ErlNifEnv* env,
+ ERL_NIF_TERM eVal,
+ size_t defSz,
+ size_t* sz)
+{
+ int val;
+
+ if (!GET_INT(env, eVal, &val))
+ return ESOCK_STR_EINVAL;
+
+ if (val > 0)
+ *sz = (size_t) val;
+ else
+ *sz = defSz;
+
+ return NULL;
+}
+
+
+
+/* *** esock_decode_string ***
+ *
+ * Decode a string value. A successful decode results in an
+ * allocation of the string, which the caller has to free
+ * once the string has been used.
+ */
+extern
+BOOLEAN_T esock_decode_string(ErlNifEnv* env,
+ const ERL_NIF_TERM eString,
+ char** stringP)
+{
+ BOOLEAN_T result;
+ unsigned int len;
+ char* bufP;
+
+ if (!GET_LIST_LEN(env, eString, &len) && (len != 0)) {
+ *stringP = NULL;
+ result = FALSE;
+ } else {
+
+ UDBG( ("SUTIL", "esock_decode_string -> len: %d\r\n", len) );
+
+ bufP = MALLOC(len + 1); // We shall NULL-terminate
+
+ if (GET_STR(env, eString, bufP, len+1)) {
+ UDBG( ("SUTIL", "esock_decode_string -> buf: %s\r\n", bufP) );
+ // bufP[len] = '\0';
+ *stringP = bufP;
+ result = TRUE;
+ } else {
+ *stringP = NULL;
+ result = FALSE;
+ FREE(bufP);
+ }
+ }
+
+ return result;
+}
+
+
+
+/* *** esock_extract_bool_from_map ***
+ *
+ * Extract an boolean item from a map.
+ *
+ */
+extern
+BOOLEAN_T esock_extract_bool_from_map(ErlNifEnv* env,
+ ERL_NIF_TERM map,
+ ERL_NIF_TERM key,
+ BOOLEAN_T def)
+{
+ ERL_NIF_TERM val;
+
+ if (!GET_MAP_VAL(env, map, key, &val))
+ return def;
+
+ if (!IS_ATOM(env, val))
+ return def;
+
+ if (COMPARE(val, esock_atom_true) == 0)
+ return TRUE;
+ else
+ return FALSE;
+}
+
+
+
+/* *** esock_decode_bool ***
+ *
+ * Decode a boolean value.
+ *
+ */
+extern
+BOOLEAN_T esock_decode_bool(ERL_NIF_TERM val)
+{
+ if (COMPARE(esock_atom_true, val) == 0)
+ return TRUE;
+ else
+ return FALSE;
+}
+
+
+/* *** esock_encode_bool ***
+ *
+ * Encode a boolean value.
+ *
+ */
+extern
+ERL_NIF_TERM esock_encode_bool(BOOLEAN_T val)
+{
+ if (val)
+ return esock_atom_true;
+ else
+ return esock_atom_false;
+}
+
+
+/* Create an ok two (2) tuple in the form:
+ *
+ * {ok, Any}
+ *
+ * The second element (Any) is already in the form of an
+ * ERL_NIF_TERM so all we have to do is create the tuple.
+ */
+extern
+ERL_NIF_TERM esock_make_ok2(ErlNifEnv* env, ERL_NIF_TERM any)
+{
+ return MKT2(env, esock_atom_ok, any);
+}
+
+
+/* Create an ok three (3) tuple in the form:
+ *
+ * {ok, Val1, Val2}
+ *
+ * The second (Val1) and third (Val2) elements are already in
+ * the form of an ERL_NIF_TERM so all we have to do is create
+ * the tuple.
+ */
+extern
+ERL_NIF_TERM esock_make_ok3(ErlNifEnv* env, ERL_NIF_TERM val1, ERL_NIF_TERM val2)
+{
+ return MKT3(env, esock_atom_ok, val1, val2);
+}
+
+
+
+/* Create an error two (2) tuple in the form:
+ *
+ * {error, Reason}
+ *
+ * The second element (Reason) is already in the form of an
+ * ERL_NIF_TERM so all we have to do is create the tuple.
+ */
+extern
+ERL_NIF_TERM esock_make_error(ErlNifEnv* env, ERL_NIF_TERM reason)
+{
+ return MKT2(env, esock_atom_error, reason);
+}
+
+
+
+/* Create an error two (2) tuple in the form: {error, Reason}.
+ *
+ * {error, Reason}
+ *
+ * The second element, Reason, is the reason string that has
+ * converted into an atom.
+ */
+extern
+ERL_NIF_TERM esock_make_error_str(ErlNifEnv* env, char* reason)
+{
+ return esock_make_error(env, MKA(env, reason));
+}
+
+
+/* Create an error two (2) tuple in the form:
+ *
+ * {error, Reason}
+ *
+ * The second element, Reason, is the errno value in its
+ * basic form (integer) which has been converted into an atom.
+ */
+extern
+ERL_NIF_TERM esock_make_error_errno(ErlNifEnv* env, int err)
+{
+ return esock_make_error_str(env, erl_errno_id(err));
+}
+
+
+
+/* strnlen doesn't exist everywhere */
+extern
+size_t esock_strnlen(const char *s, size_t maxlen)
+{
+ size_t i = 0;
+ while (i < maxlen && s[i] != '\0')
+ i++;
+ return i;
+}
+
+
+
+/* *** esock_abort ***
+ *
+ * Generate an abort with "extra" info. This should be called
+ * via the ESOCK_ABORT macro.
+ * Basically it prints the extra info onto stderr before aborting.
+ *
+ */
+extern
+void esock_abort(const char* expr,
+ const char* func,
+ const char* file,
+ int line)
+{
+ fflush(stdout);
+ fprintf(stderr, "%s:%d:%s() Assertion failed: %s\n",
+ file, line, func, expr);
+ fflush(stderr);
+ abort();
+}
+
+
+
+/* *** esock_warning_msg ***
+ *
+ * Temporary function for issuing warning messages.
+ *
+ */
+extern
+void esock_warning_msg( const char* format, ... )
+{
+ va_list args;
+ char f[512 + sizeof(format)]; // This has to suffice...
+ char stamp[64]; // Just in case...
+ struct timespec ts;
+ int res;
+
+ /*
+ * We should really include self in the printout, so we can se which process
+ * are executing the code. But then I must change the API....
+ * ....something for later.
+ */
+
+ // 2018-06-29 12:13:21.232089
+ // 29-Jun-2018::13:47:25.097097
+
+ if (!realtime(&ts)) {
+ if (timespec2str(stamp, sizeof(stamp), &ts) != 0) {
+ res = enif_snprintf(f, sizeof(f), "=WARNING MSG==== %s", format);
+ } else {
+ res = enif_snprintf(f, sizeof(f),
+ "=WARNING MSG==== %s ===\r\n%s" , stamp, format);
+ }
+
+ if (res > 0) {
+ va_start (args, format);
+ enif_vfprintf (stdout, f, args);
+ va_end (args);
+ fflush(stdout);
+ }
+ }
+
+ return;
+}
+
+
+static
+int realtime(struct timespec* tsP)
+{
+ return clock_gettime(CLOCK_REALTIME, tsP);
+}
+
+
+/*
+ * Convert a timespec struct into a readable/printable string.
+ *
+ * "%F::%T" => 2018-06-29 12:13:21[.232089]
+ * "%d-%b-%Y::%T" => 29-Jun-2018::13:47:25.097097
+ */
+static
+int timespec2str(char *buf, unsigned int len, struct timespec *ts)
+{
+ int ret, buflen;
+ struct tm t;
+
+ tzset();
+ if (localtime_r(&(ts->tv_sec), &t) == NULL)
+ return 1;
+
+ ret = strftime(buf, len, "%d-%B-%Y::%T", &t);
+ if (ret == 0)
+ return 2;
+ len -= ret - 1;
+ buflen = strlen(buf);
+
+ ret = snprintf(&buf[buflen], len, ".%06ld", ts->tv_nsec/1000);
+ if (ret >= len)
+ return 3;
+
+ return 0;
+}
+
+
+/* =================================================================== *
+ * *
+ * Various (internal) utility functions *
+ * *
+ * =================================================================== */
+
+/* Construct the IPv4 socket address */
+static
+char* make_sockaddr_in4(ErlNifEnv* env,
+ ERL_NIF_TERM port,
+ ERL_NIF_TERM addr,
+ ERL_NIF_TERM* sa)
+{
+ ERL_NIF_TERM keys[] = {esock_atom_family, esock_atom_port, esock_atom_addr};
+ ERL_NIF_TERM vals[] = {esock_atom_inet, port, addr};
+ unsigned int numKeys = sizeof(keys) / sizeof(ERL_NIF_TERM);
+ unsigned int numVals = sizeof(vals) / sizeof(ERL_NIF_TERM);
+
+ ESOCK_ASSERT( (numKeys == numVals) );
+
+ if (!MKMA(env, keys, vals, numKeys, sa)) {
+ *sa = esock_atom_undefined;
+ return ESOCK_STR_EINVAL;
+ } else {
+ return NULL;
+ }
+}
+
+
+/* Construct the IPv6 socket address */
+static
+char* make_sockaddr_in6(ErlNifEnv* env,
+ ERL_NIF_TERM port,
+ ERL_NIF_TERM addr,
+ ERL_NIF_TERM flowInfo,
+ ERL_NIF_TERM scopeId,
+ ERL_NIF_TERM* sa)
+{
+ ERL_NIF_TERM keys[] = {esock_atom_family,
+ esock_atom_port,
+ esock_atom_addr,
+ esock_atom_flowinfo,
+ esock_atom_scope_id};
+ ERL_NIF_TERM vals[] = {esock_atom_inet6, port, addr, flowInfo, scopeId};
+ unsigned int numKeys = sizeof(keys) / sizeof(ERL_NIF_TERM);
+ unsigned int numVals = sizeof(vals) / sizeof(ERL_NIF_TERM);
+
+ ESOCK_ASSERT( (numKeys == numVals) );
+
+ if (!MKMA(env, keys, vals, numKeys, sa)) {
+ *sa = esock_atom_undefined;
+ return ESOCK_STR_EINVAL;
+ } else {
+ return NULL;
+ }
+}
+
+
+/* Construct the Unix Domain socket address */
+static
+char* make_sockaddr_un(ErlNifEnv* env,
+ ERL_NIF_TERM path,
+ ERL_NIF_TERM* sa)
+{
+ ERL_NIF_TERM keys[] = {esock_atom_family, esock_atom_path};
+ ERL_NIF_TERM vals[] = {esock_atom_inet, path};
+ unsigned int numKeys = sizeof(keys) / sizeof(ERL_NIF_TERM);
+ unsigned int numVals = sizeof(vals) / sizeof(ERL_NIF_TERM);
+
+ ESOCK_ASSERT( (numKeys == numVals) );
+
+ if (!MKMA(env, keys, vals, numKeys, sa)) {
+ *sa = esock_atom_undefined;
+ return ESOCK_STR_EINVAL;
+ } else {
+ return NULL;
+ }
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-25 08:45:33 +0000