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//
// Copyright 2024 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include "core/nng_impl.h"
#ifdef NNG_PLATFORM_POSIX
#include <arpa/inet.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#ifndef NNG_HAVE_INET6
#ifdef HAVE_NNG_HAVE_INET6_BSD
#define NNG_HAVE_INET6
#include <netinet6/in6.h>
#else
#undef NNG_ENABLE_IPV6
#endif
#endif
size_t
nni_posix_nn2sockaddr(void *sa, const nni_sockaddr *na)
{
struct sockaddr_in *sin;
struct sockaddr_un *spath;
const nng_sockaddr_in *nsin;
const nng_sockaddr_path *nspath;
const nng_sockaddr_abstract *nsabs;
size_t sz;
#ifdef NNG_ENABLE_IPV6
struct sockaddr_in6 *sin6;
const nng_sockaddr_in6 *nsin6;
#endif
if ((sa == NULL) || (na == NULL)) {
return (0);
}
switch (na->s_family) {
case NNG_AF_INET:
sin = (void *) sa;
nsin = &na->s_in;
memset(sin, 0, sizeof(*sin));
sin->sin_family = PF_INET;
sin->sin_port = nsin->sa_port;
sin->sin_addr.s_addr = nsin->sa_addr;
return (sizeof(*sin));
#ifdef NNG_ENABLE_IPV6
case NNG_AF_INET6:
sin6 = (void *) sa;
nsin6 = &na->s_in6;
memset(sin6, 0, sizeof(*sin6));
#ifdef SIN6_LEN
sin6->sin6_len = sizeof(*sin6);
#endif
sin6->sin6_family = PF_INET6;
sin6->sin6_port = nsin6->sa_port;
sin6->sin6_scope_id = nsin6->sa_scope;
memcpy(sin6->sin6_addr.s6_addr, nsin6->sa_addr, 16);
return (sizeof(*sin6));
#endif
case NNG_AF_IPC:
spath = (void *) sa;
nspath = &na->s_ipc;
memset(spath, 0, sizeof(*spath));
// Make sure that the path fits!
sz = sizeof(spath->sun_path);
if (nni_strlcpy(spath->sun_path, nspath->sa_path, sz) >= sz) {
return (0);
}
spath->sun_family = PF_UNIX;
return (sizeof(*spath));
case NNG_AF_ABSTRACT:
spath = (void *) sa;
nsabs = &na->s_abstract;
if (nsabs->sa_len >= sizeof(spath->sun_path)) {
return (0);
}
memset(spath, 0, sizeof(*spath));
spath->sun_family = PF_UNIX;
spath->sun_path[0] = '\0'; // abstract starts with nul
// We support auto-bind with an empty string. There is
// a subtle caveat here, which is that we cannot bind to
// the *empty* name.
if (nsabs->sa_len == 0) {
return (sizeof(sa_family_t)); // auto bind
} else {
memcpy(&spath->sun_path[1], nsabs->sa_name,
nsabs->sa_len);
return (sizeof(sa_family_t) + 1 + nsabs->sa_len);
}
}
return (0);
}
int
nni_posix_sockaddr2nn(nni_sockaddr *na, const void *sa, size_t sz)
{
const struct sockaddr_in *sin;
const struct sockaddr_un *spath;
nng_sockaddr_in *nsin;
nng_sockaddr_path *nspath;
nng_sockaddr_abstract *nsabs;
#ifdef NNG_ENABLE_IPV6
const struct sockaddr_in6 *sin6;
nng_sockaddr_in6 *nsin6;
#endif
switch (((const struct sockaddr *) sa)->sa_family) {
case AF_INET:
if (sz < sizeof(*sin)) {
return (-1);
}
sin = (void *) sa;
nsin = &na->s_in;
nsin->sa_family = NNG_AF_INET;
nsin->sa_port = sin->sin_port;
nsin->sa_addr = sin->sin_addr.s_addr;
break;
#ifdef NNG_ENABLE_IPV6
case AF_INET6:
if (sz < sizeof(*sin6)) {
return (-1);
}
sin6 = (void *) sa;
nsin6 = &na->s_in6;
nsin6->sa_family = NNG_AF_INET6;
nsin6->sa_port = sin6->sin6_port;
nsin6->sa_scope = sin6->sin6_scope_id;
memcpy(nsin6->sa_addr, sin6->sin6_addr.s6_addr, 16);
break;
#endif
case AF_UNIX:
// AF_UNIX can be NNG_AF_IPC, or NNG_AF_ABSTRACT.
spath = (void *) sa;
if ((sz < sizeof(sa_family_t)) || (sz > sizeof(*spath))) {
return (-1);
}
// Now we need to look more closely.
sz -= sizeof(sa_family_t);
if (sz == 0) {
// Unnamed socket. These will be treated using
// auto-bind if we actually listen to them, and
// it is impossible to connect them.
nsabs = &na->s_abstract;
nsabs->sa_family = NNG_AF_ABSTRACT;
nsabs->sa_len = 0;
} else if (spath->sun_path[0] == 0) {
nsabs = &na->s_abstract;
nsabs->sa_family = NNG_AF_ABSTRACT;
nsabs->sa_len = sz - 1;
memcpy(nsabs->sa_name, &spath->sun_path[1], sz - 1);
} else {
nspath = &na->s_ipc;
nspath->sa_family = NNG_AF_IPC;
nni_strlcpy(nspath->sa_path, spath->sun_path,
sizeof(nspath->sa_path));
}
break;
default:
// We should never see this - the OS should always be
// specific about giving us either AF_INET or AF_INET6.
// Other address families are not handled here.
return (-1);
}
return (0);
}
#endif // NNG_PLATFORM_POSIX
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