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-rw-r--r--src/socket.c1169
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diff --git a/src/socket.c b/src/socket.c
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+++ b/src/socket.c
@@ -0,0 +1,1169 @@
+/*
+ * socket.c
+ *
+ * Copyright (C) 2012-2020 Nikias Bassen <nikias@gmx.li>
+ * Copyright (C) 2012 Martin Szulecki <m.szulecki@libimobiledevice.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#ifdef WIN32
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include <windows.h>
+#ifndef HAVE_GETIFADDRS
+#include <iphlpapi.h>
+#endif
+static int wsa_init = 0;
+#ifndef IFF_RUNNING
+#define IFF_RUNNING IFF_UP
+#endif
+#ifndef AI_NUMERICSERV
+#define AI_NUMERICSERV 0
+#endif
+#else
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <fcntl.h>
+#ifdef AF_INET6
+#include <net/if.h>
+#include <ifaddrs.h>
+#endif
+#endif
+#include "common.h"
+#include "libimobiledevice-glue/socket.h"
+
+#define RECV_TIMEOUT 20000
+#define SEND_TIMEOUT 10000
+#define CONNECT_TIMEOUT 5000
+
+#ifndef EAFNOSUPPORT
+#define EAFNOSUPPORT 102
+#endif
+#ifndef ECONNRESET
+#define ECONNRESET 108
+#endif
+#ifndef ETIMEDOUT
+#define ETIMEDOUT 138
+#endif
+
+static int verbose = 0;
+
+LIBIMOBILEDEVICE_GLUE_API void socket_set_verbose(int level)
+{
+ verbose = level;
+}
+
+LIBIMOBILEDEVICE_GLUE_API const char *socket_addr_to_string(struct sockaddr *addr, char *addr_out, size_t addr_out_size)
+{
+#ifdef WIN32
+ WSADATA wsa_data;
+ if (!wsa_init) {
+ if (WSAStartup(MAKEWORD(2,2), &wsa_data) != ERROR_SUCCESS) {
+ fprintf(stderr, "WSAStartup failed!\n");
+ ExitProcess(-1);
+ }
+ wsa_init = 1;
+ }
+ DWORD addr_out_len = addr_out_size;
+ DWORD addrlen = 0;
+
+ if (addr->sa_family == AF_INET) {
+ addrlen = sizeof(struct sockaddr_in);
+ }
+#ifdef AF_INET6
+ else if (addr->sa_family == AF_INET6) {
+ addrlen = sizeof(struct sockaddr_in6);
+ }
+#endif
+ else {
+ errno = EAFNOSUPPORT;
+ return NULL;
+ }
+
+ if (WSAAddressToString(addr, addrlen, NULL, addr_out, &addr_out_len) == 0) {
+ return addr_out;
+ }
+#else
+ const void *addrdata = NULL;
+
+ if (addr->sa_family == AF_INET) {
+ addrdata = &((struct sockaddr_in*)addr)->sin_addr;
+ }
+#ifdef AF_INET6
+ else if (addr->sa_family == AF_INET6) {
+ addrdata = &((struct sockaddr_in6*)addr)->sin6_addr;
+ }
+#endif
+ else {
+ errno = EAFNOSUPPORT;
+ return NULL;
+ }
+
+ if (inet_ntop(addr->sa_family, addrdata, addr_out, addr_out_size)) {
+ return addr_out;
+ }
+#endif
+ return NULL;
+}
+
+#ifndef WIN32
+LIBIMOBILEDEVICE_GLUE_API int socket_create_unix(const char *filename)
+{
+ struct sockaddr_un name;
+ int sock;
+#ifdef SO_NOSIGPIPE
+ int yes = 1;
+#endif
+
+ // remove if still present
+ unlink(filename);
+
+ /* Create the socket. */
+ sock = socket(PF_UNIX, SOCK_STREAM, 0);
+ if (sock < 0) {
+ perror("socket");
+ return -1;
+ }
+
+#ifdef SO_NOSIGPIPE
+ if (setsockopt(sock, SOL_SOCKET, SO_NOSIGPIPE, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ socket_close(sock);
+ return -1;
+ }
+#endif
+
+ /* Bind a name to the socket. */
+ name.sun_family = AF_UNIX;
+ strncpy(name.sun_path, filename, sizeof(name.sun_path));
+ name.sun_path[sizeof(name.sun_path) - 1] = '\0';
+
+ if (bind(sock, (struct sockaddr*)&name, sizeof(name)) < 0) {
+ perror("bind");
+ socket_close(sock);
+ return -1;
+ }
+
+ if (listen(sock, 100) < 0) {
+ perror("listen");
+ socket_close(sock);
+ return -1;
+ }
+
+ return sock;
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_connect_unix(const char *filename)
+{
+ struct sockaddr_un name;
+ int sfd = -1;
+ struct stat fst;
+#ifdef SO_NOSIGPIPE
+ int yes = 1;
+#endif
+ int bufsize = 0x20000;
+
+ // check if socket file exists...
+ if (stat(filename, &fst) != 0) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: stat '%s': %s\n", __func__, filename,
+ strerror(errno));
+ return -1;
+ }
+ // ... and if it is a unix domain socket
+ if (!S_ISSOCK(fst.st_mode)) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: File '%s' is not a socket!\n", __func__,
+ filename);
+ return -1;
+ }
+ // make a new socket
+ if ((sfd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: socket: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_SNDBUF, (void*)&bufsize, sizeof(int)) == -1) {
+ perror("Could not set send buffer for socket");
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_RCVBUF, (void*)&bufsize, sizeof(int)) == -1) {
+ perror("Could not set receive buffer for socket");
+ }
+
+#ifdef SO_NOSIGPIPE
+ if (setsockopt(sfd, SOL_SOCKET, SO_NOSIGPIPE, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ socket_close(sfd);
+ return -1;
+ }
+#endif
+ // and connect to 'filename'
+ name.sun_family = AF_UNIX;
+ strncpy(name.sun_path, filename, sizeof(name.sun_path));
+ name.sun_path[sizeof(name.sun_path) - 1] = 0;
+
+ int flags = fcntl(sfd, F_GETFL, 0);
+ fcntl(sfd, F_SETFL, flags | O_NONBLOCK);
+
+ do {
+ if (connect(sfd, (struct sockaddr*)&name, sizeof(name)) != -1) {
+ break;
+ }
+ if (errno == EINPROGRESS) {
+ fd_set fds;
+ FD_ZERO(&fds);
+ FD_SET(sfd, &fds);
+
+ struct timeval timeout;
+ timeout.tv_sec = CONNECT_TIMEOUT / 1000;
+ timeout.tv_usec = (CONNECT_TIMEOUT - (timeout.tv_sec * 1000)) * 1000;
+ if (select(sfd + 1, NULL, &fds, NULL, &timeout) == 1) {
+ int so_error;
+ socklen_t len = sizeof(so_error);
+ getsockopt(sfd, SOL_SOCKET, SO_ERROR, (void*)&so_error, &len);
+ if (so_error == 0) {
+ break;
+ }
+ }
+ }
+ socket_close(sfd);
+ sfd = -1;
+ } while (0);
+
+ if (sfd < 0) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: connect: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ return sfd;
+}
+#endif
+
+LIBIMOBILEDEVICE_GLUE_API int socket_create(const char* addr, uint16_t port)
+{
+ int sfd = -1;
+ int yes = 1;
+ struct addrinfo hints;
+ struct addrinfo *result, *rp;
+ char portstr[8];
+ int res;
+#ifdef WIN32
+ WSADATA wsa_data;
+ if (!wsa_init) {
+ if (WSAStartup(MAKEWORD(2,2), &wsa_data) != ERROR_SUCCESS) {
+ fprintf(stderr, "WSAStartup failed!\n");
+ ExitProcess(-1);
+ }
+ wsa_init = 1;
+ }
+#endif
+
+ memset(&hints, '\0', sizeof(struct addrinfo));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_PASSIVE | AI_NUMERICSERV;
+ hints.ai_protocol = IPPROTO_TCP;
+
+ sprintf(portstr, "%d", port);
+
+ if (!addr) {
+ addr = "localhost";
+ }
+ res = getaddrinfo(addr, portstr, &hints, &result);
+ if (res != 0) {
+ fprintf(stderr, "%s: getaddrinfo: %s\n", __func__, gai_strerror(res));
+ return -1;
+ }
+
+ for (rp = result; rp != NULL; rp = rp->ai_next) {
+ sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+ if (sfd == -1) {
+ continue;
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ socket_close(sfd);
+ continue;
+ }
+
+#ifdef SO_NOSIGPIPE
+ if (setsockopt(sfd, SOL_SOCKET, SO_NOSIGPIPE, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ socket_close(sfd);
+ continue;
+ }
+#endif
+
+#if defined(AF_INET6) && defined(IPV6_V6ONLY)
+ if (rp->ai_family == AF_INET6) {
+ if (setsockopt(sfd, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt() IPV6_V6ONLY");
+ }
+ }
+#endif
+
+ if (bind(sfd, rp->ai_addr, rp->ai_addrlen) < 0) {
+ perror("bind()");
+ socket_close(sfd);
+ continue;
+ }
+
+ if (listen(sfd, 100) < 0) {
+ perror("listen()");
+ socket_close(sfd);
+ continue;
+ }
+ break;
+ }
+
+ freeaddrinfo(result);
+
+ if (rp == NULL) {
+ return -1;
+ }
+
+ return sfd;
+}
+
+#ifdef AF_INET6
+static uint32_t _in6_addr_scope(struct in6_addr* addr)
+{
+ uint32_t scope = 0;
+
+ if (IN6_IS_ADDR_MULTICAST(addr)) {
+ if (IN6_IS_ADDR_MC_NODELOCAL(addr)) {
+ scope = 1;
+ } else if (IN6_IS_ADDR_MC_LINKLOCAL(addr)) {
+ scope = 2;
+ } else if (IN6_IS_ADDR_MC_SITELOCAL(addr)) {
+ scope = 5;
+ }
+
+ return scope;
+ }
+
+ if (IN6_IS_ADDR_LINKLOCAL(addr)) {
+ scope = 2;
+ } else if (IN6_IS_ADDR_LOOPBACK(addr)) {
+ scope = 2;
+ } else if (IN6_IS_ADDR_SITELOCAL(addr)) {
+ scope = 5;
+ } else if (IN6_IS_ADDR_UNSPECIFIED(addr)) {
+ scope = 0;
+ }
+
+ return scope;
+}
+
+#ifndef HAVE_GETIFADDRS
+#ifdef WIN32
+
+struct ifaddrs {
+ struct ifaddrs *ifa_next; /* Next item in list */
+ char *ifa_name; /* Name of interface */
+ unsigned int ifa_flags; /* Flags from SIOCGIFFLAGS */
+ struct sockaddr *ifa_addr; /* Address of interface */
+ struct sockaddr *ifa_netmask; /* Netmask of interface */
+ union {
+ struct sockaddr *ifu_broadaddr; /* Broadcast address of interface */
+ struct sockaddr *ifu_dstaddr; /* Point-to-point destination address */
+ } ifa_ifu;
+#define ifa_broadaddr ifa_ifu.ifu_broadaddr
+#define ifa_dstaddr ifa_ifu.ifu_dstaddr
+ void *ifa_data; /* Address-specific data */
+};
+
+#define WORKING_BUFFER_SIZE 15000
+#define MAX_TRIES 3
+
+static void freeifaddrs(struct ifaddrs *ifa)
+{
+ if (!ifa) {
+ return;
+ }
+ free(ifa->ifa_name);
+ free(ifa->ifa_addr);
+ free(ifa->ifa_netmask);
+ free(ifa->ifa_dstaddr);
+ freeifaddrs(ifa->ifa_next);
+ free(ifa);
+}
+
+/*
+ * getifaddrs() reference implementation for win32.
+ * Heavily based on openpgm's implementation found here:
+ * https://github.com/steve-o/openpgm/blob/master/openpgm/pgm/getifaddrs.c
+ */
+static int getifaddrs(struct ifaddrs** ifap)
+{
+ struct ifaddrs* ifa = NULL;
+
+ DWORD dwRetVal = 0;
+
+ PIP_ADAPTER_ADDRESSES pAddresses = NULL;
+ ULONG outBufLen = 0;
+ ULONG Iterations = 0;
+
+ ULONG flags = GAA_FLAG_INCLUDE_PREFIX |
+ GAA_FLAG_SKIP_ANYCAST |
+ GAA_FLAG_SKIP_DNS_SERVER |
+ GAA_FLAG_SKIP_FRIENDLY_NAME |
+ GAA_FLAG_SKIP_MULTICAST;
+
+ PIP_ADAPTER_ADDRESSES adapter = NULL;
+
+ if (!ifap) {
+ errno = EINVAL;
+ return -1;
+ }
+ *ifap = NULL;
+
+ outBufLen = WORKING_BUFFER_SIZE;
+ do {
+ pAddresses = (IP_ADAPTER_ADDRESSES*)malloc(outBufLen);
+ if (pAddresses == NULL) {
+ printf("Memory allocation failed for IP_ADAPTER_ADDRESSES struct\n");
+ return -1;
+ }
+ dwRetVal = GetAdaptersAddresses(AF_UNSPEC, flags, NULL, pAddresses, &outBufLen);
+ if (dwRetVal == ERROR_BUFFER_OVERFLOW) {
+ free(pAddresses);
+ pAddresses = NULL;
+ } else {
+ break;
+ }
+ Iterations++;
+ } while ((dwRetVal == ERROR_BUFFER_OVERFLOW) && (Iterations < MAX_TRIES));
+
+ if (dwRetVal != NO_ERROR) {
+ free(pAddresses);
+ return -1;
+ }
+
+ for (adapter = pAddresses; adapter; adapter = adapter->Next) {
+ int unicastIndex = 0;
+ for (IP_ADAPTER_UNICAST_ADDRESS *unicast = adapter->FirstUnicastAddress; unicast; unicast = unicast->Next, ++unicastIndex) {
+ /* ensure IP adapter */
+ if (AF_INET != unicast->Address.lpSockaddr->sa_family && AF_INET6 != unicast->Address.lpSockaddr->sa_family) {
+ continue;
+ }
+
+ if (!ifa) {
+ ifa = malloc(sizeof(struct ifaddrs));
+ if (!ifa) {
+ errno = ENOMEM;
+ free(pAddresses);
+ return -1;
+ }
+ *ifap = ifa;
+ ifa->ifa_next = NULL;
+ } else {
+ struct ifaddrs* ifanew = malloc(sizeof(struct ifaddrs));
+ if (!ifanew) {
+ freeifaddrs(*ifap);
+ free(pAddresses);
+ errno = ENOMEM;
+ return -1;
+ }
+ ifa->ifa_next = ifanew;
+ ifa = ifanew;
+ ifa->ifa_next = NULL;
+ }
+
+ /* name */
+ ifa->ifa_name = strdup(adapter->AdapterName);
+
+ /* flags */
+ ifa->ifa_flags = 0;
+ if (IfOperStatusUp == adapter->OperStatus)
+ ifa->ifa_flags |= IFF_UP;
+ if (IF_TYPE_SOFTWARE_LOOPBACK == adapter->IfType)
+ ifa->ifa_flags |= IFF_LOOPBACK;
+ if (!(adapter->Flags & IP_ADAPTER_NO_MULTICAST))
+ ifa->ifa_flags |= IFF_MULTICAST;
+
+ /* address */
+ ifa->ifa_addr = (struct sockaddr*)malloc(sizeof(struct sockaddr_storage));
+ memcpy(ifa->ifa_addr, unicast->Address.lpSockaddr, unicast->Address.iSockaddrLength);
+
+ /* netmask */
+ ifa->ifa_netmask = (struct sockaddr*)malloc(sizeof(struct sockaddr_storage));
+ memset(ifa->ifa_netmask, 0, sizeof(struct sockaddr_storage));
+
+/* pre-Vista must hunt for matching prefix in linked list, otherwise use
+ * OnLinkPrefixLength from IP_ADAPTER_UNICAST_ADDRESS structure.
+ * FirstPrefix requires Windows XP SP1, from SP1 to pre-Vista provides a
+ * single adapter prefix for each IP address. Vista and later provides
+ * host IP address prefix, subnet IP address, and subnet broadcast IP
+ * address. In addition there is a multicast and broadcast address prefix.
+ */
+ ULONG prefixLength = 0;
+
+#if defined( _WIN32 ) && ( _WIN32_WINNT >= 0x0600 )
+/* For a unicast IPv4 address, any value greater than 32 is an illegal
+ * value. For a unicast IPv6 address, any value greater than 128 is an
+ * illegal value. A value of 255 is commonly used to represent an illegal
+ * value.
+ *
+ * Windows 7 SP1 returns 64 for Teredo links which is incorrect.
+ */
+
+#define IN6_IS_ADDR_TEREDO(addr) \
+ (((const uint32_t *)(addr))[0] == ntohl (0x20010000))
+
+ if (AF_INET6 == unicast->Address.lpSockaddr->sa_family &&
+/* TunnelType only applies to one interface on the adapter and no
+ * convenient method is provided to determine which.
+ */
+ TUNNEL_TYPE_TEREDO == adapter->TunnelType &&
+/* Test the interface with the known Teredo network prefix.
+ */
+ IN6_IS_ADDR_TEREDO( &((struct sockaddr_in6*)(unicast->Address.lpSockaddr))->sin6_addr) &&
+/* Test that this version is actually wrong, subsequent releases from Microsoft
+ * may resolve the issue.
+ */
+ 32 != unicast->OnLinkPrefixLength)
+ {
+ prefixLength = 32;
+ }
+ else
+ prefixLength = unicast->OnLinkPrefixLength;
+#else
+/* The order of linked IP_ADAPTER_UNICAST_ADDRESS structures pointed to by
+ * the FirstUnicastAddress member does not have any relationship with the
+ * order of linked IP_ADAPTER_PREFIX structures pointed to by the FirstPrefix
+ * member.
+ *
+ * Example enumeration:
+ * [ no subnet ]
+ * ::1/128 - address
+ * ff00::%1/8 - multicast (no IPv6 broadcast)
+ * 127.0.0.0/8 - subnet
+ * 127.0.0.1/32 - address
+ * 127.255.255.255/32 - subnet broadcast
+ * 224.0.0.0/4 - multicast
+ * 255.255.255.255/32 - broadcast
+ *
+ * Which differs from most adapters listing three IPv6:
+ * fe80::%10/64 - subnet
+ * fe80::51e9:5fe5:4202:325a%10/128 - address
+ * ff00::%10/8 - multicast
+ *
+ * !IfOperStatusUp IPv4 addresses are skipped:
+ * fe80::%13/64 - subnet
+ * fe80::d530:946d:e8df:8c91%13/128 - address
+ * ff00::%13/8 - multicast
+ * [ no subnet ]
+ * [ no address ]
+ * 224.0.0.0/4 - multicast
+ * 255.255.255.255/32 - broadcast
+ *
+ * On PTP links no multicast or broadcast addresses are returned:
+ * [ no subnet ]
+ * fe80::5efe:10.203.9.30/128 - address
+ * [ no multicast ]
+ * [ no multicast ]
+ * [ no broadcast ]
+ *
+ * Active primary IPv6 interfaces are a bit overloaded:
+ * ::/0 - default route
+ * 2001::/32 - global subnet
+ * 2001:0:4137:9e76:2443:d6:ba87:1a2a/128 - global address
+ * fe80::/64 - link-local subnet
+ * fe80::2443:d6:ba87:1a2a/128 - link-local address
+ * ff00::/8 - multicast
+ */
+
+#define IN_LINKLOCAL(a) ((((uint32_t) (a)) & 0xaffff0000) == 0xa9fe0000)
+
+ for (IP_ADAPTER_PREFIX *prefix = adapter->FirstPrefix; prefix; prefix = prefix->Next) {
+ LPSOCKADDR lpSockaddr = prefix->Address.lpSockaddr;
+ if (lpSockaddr->sa_family != unicast->Address.lpSockaddr->sa_family)
+ continue;
+/* special cases */
+/* RFC2863: IPv4 interface not up */
+ if (AF_INET == lpSockaddr->sa_family && adapter->OperStatus != IfOperStatusUp) {
+/* RFC3927: link-local IPv4 always has 16-bit CIDR */
+ if (IN_LINKLOCAL( ntohl (((struct sockaddr_in*)(unicast->Address.lpSockaddr))->sin_addr.s_addr))) {
+ prefixLength = 16;
+ }
+ break;
+ }
+/* default IPv6 route */
+ if (AF_INET6 == lpSockaddr->sa_family && 0 == prefix->PrefixLength && IN6_IS_ADDR_UNSPECIFIED( &((struct sockaddr_in6*)(lpSockaddr))->sin6_addr)) {
+ continue;
+ }
+/* Assume unicast address for first prefix of operational adapter */
+ if (AF_INET == lpSockaddr->sa_family)
+ if (IN_MULTICAST( ntohl (((struct sockaddr_in*)(lpSockaddr))->sin_addr.s_addr))) {
+ fprintf(stderr, "FATAL: first prefix is non a unicast address\n");
+ break;
+ }
+ if (AF_INET6 == lpSockaddr->sa_family)
+ if (IN6_IS_ADDR_MULTICAST( &((struct sockaddr_in6*)(lpSockaddr))->sin6_addr)) {
+ fprintf(stderr, "FATAL: first prefix is not a unicast address\n");
+ break;
+ }
+/* Assume subnet or host IP address for XP backward compatibility */
+
+ prefixLength = prefix->PrefixLength;
+ break;
+ }
+#endif /* defined( _WIN32 ) && ( _WIN32_WINNT >= 0x0600 ) */
+
+/* map prefix to netmask */
+ ifa->ifa_netmask->sa_family = unicast->Address.lpSockaddr->sa_family;
+ switch (unicast->Address.lpSockaddr->sa_family) {
+ case AF_INET:
+ if (0 == prefixLength || prefixLength > 32) {
+ prefixLength = 32;
+ }
+#if defined( _WIN32) && ( _WIN32_WINNT >= 0x0600 )
+/* Added in Vista, but no IPv6 equivalent. */
+ {
+ ULONG Mask;
+ ConvertLengthToIpv4Mask (prefixLength, &Mask);
+ ((struct sockaddr_in*)ifa->ifa_netmask)->sin_addr.s_addr = Mask; /* network order */
+ }
+#else
+/* NB: left-shift of full bit-width is undefined in C standard. */
+ ((struct sockaddr_in*)ifa->ifa_netmask)->sin_addr.s_addr = htonl( 0xffffffffU << ( 32 - prefixLength ) );
+#endif
+ break;
+
+ case AF_INET6:
+ if (0 == prefixLength || prefixLength > 128) {
+ prefixLength = 128;
+ }
+ for (LONG i = prefixLength, j = 0; i > 0; i -= 8, ++j) {
+ ((struct sockaddr_in6*)ifa->ifa_netmask)->sin6_addr.s6_addr[ j ] = i >= 8 ? 0xff : (ULONG)(( 0xffU << ( 8 - i ) ) & 0xffU );
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ free(pAddresses);
+
+ return 0;
+}
+#else
+#error No reference implementation for getifaddrs available for this platform.
+#endif
+#endif
+
+static int32_t _sockaddr_in6_scope_id(struct sockaddr_in6* addr)
+{
+ int32_t res = -1;
+ struct ifaddrs *ifaddr = NULL, *ifa = NULL;
+ uint32_t addr_scope;
+
+ /* get scope for requested address */
+ addr_scope = _in6_addr_scope(&addr->sin6_addr);
+ if (addr_scope == 0) {
+ /* global scope doesn't need a specific scope id */
+ return addr_scope;
+ }
+
+ /* get interfaces */
+ if (getifaddrs(&ifaddr) == -1) {
+ perror("getifaddrs");
+ return res;
+ }
+
+ /* loop over interfaces */
+ for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+ /* skip if no address is available */
+ if (ifa->ifa_addr == NULL) {
+ continue;
+ }
+
+ /* skip if wrong family */
+ if (ifa->ifa_addr->sa_family != AF_INET6) {
+ continue;
+ }
+
+ /* skip if not up */
+ if ((ifa->ifa_flags & IFF_UP) == 0) {
+ continue;
+ }
+
+ /* skip if not running */
+ if ((ifa->ifa_flags & IFF_RUNNING) == 0) {
+ continue;
+ }
+
+ struct sockaddr_in6* addr_in = (struct sockaddr_in6*)ifa->ifa_addr;
+
+ /* skip if scopes do not match */
+ if (_in6_addr_scope(&addr_in->sin6_addr) != addr_scope) {
+ continue;
+ }
+
+ /* use if address is equal */
+ if (memcmp(&addr->sin6_addr.s6_addr, &addr_in->sin6_addr.s6_addr, sizeof(addr_in->sin6_addr.s6_addr)) == 0) {
+ /* if scope id equals the requested one then assume it was valid */
+ if (addr->sin6_scope_id == addr_in->sin6_scope_id) {
+ res = addr_in->sin6_scope_id;
+ break;
+ }
+
+ if ((addr_in->sin6_scope_id > addr->sin6_scope_id) && (res >= 0)) {
+ // use last valid scope id as we're past the requested scope id
+ break;
+ }
+ res = addr_in->sin6_scope_id;
+ continue;
+ }
+
+ /* skip loopback interface if not already matched exactly above */
+ if ((ifa->ifa_flags & IFF_LOOPBACK) != 0) {
+ continue;
+ }
+
+ if ((addr_in->sin6_scope_id > addr->sin6_scope_id) && (res >= 0)) {
+ // use last valid scope id as we're past the requested scope id
+ break;
+ }
+
+ res = addr_in->sin6_scope_id;
+
+ /* if scope id equals the requested one then assume it was valid */
+ if (addr->sin6_scope_id == addr_in->sin6_scope_id) {
+ /* set the scope id of this interface as most likely candidate */
+ break;
+ }
+ }
+
+ freeifaddrs(ifaddr);
+
+ return res;
+}
+#endif
+
+LIBIMOBILEDEVICE_GLUE_API int socket_connect_addr(struct sockaddr* addr, uint16_t port)
+{
+ int sfd = -1;
+ int yes = 1;
+ int bufsize = 0x20000;
+ int addrlen = 0;
+#ifdef WIN32
+ u_long l_yes = 1;
+ WSADATA wsa_data;
+ if (!wsa_init) {
+ if (WSAStartup(MAKEWORD(2,2), &wsa_data) != ERROR_SUCCESS) {
+ fprintf(stderr, "WSAStartup failed!\n");
+ ExitProcess(-1);
+ }
+ wsa_init = 1;
+ }
+#endif
+
+ if (addr->sa_family == AF_INET) {
+ struct sockaddr_in* addr_in = (struct sockaddr_in*)addr;
+ addr_in->sin_port = htons(port);
+ addrlen = sizeof(struct sockaddr_in);
+ }
+#ifdef AF_INET6
+ else if (addr->sa_family == AF_INET6) {
+ struct sockaddr_in6* addr_in = (struct sockaddr_in6*)addr;
+ addr_in->sin6_port = htons(port);
+
+ /*
+ * IPv6 Routing Magic:
+ *
+ * If the scope of the address is a link-local one, IPv6 requires the
+ * scope id set to an interface number to allow proper routing. However,
+ * as the provided sockaddr might contain a wrong scope id, we must find
+ * a scope id from a suitable interface on this system or routing might
+ * fail. An IPv6 guru should have another look though...
+ */
+ addr_in->sin6_scope_id = _sockaddr_in6_scope_id(addr_in);
+
+ addrlen = sizeof(struct sockaddr_in6);
+ }
+#endif
+ else {
+ fprintf(stderr, "ERROR: Unsupported address family");
+ return -1;
+ }
+
+ sfd = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);
+ if (sfd == -1) {
+ perror("socket()");
+ return -1;
+ }
+
+#ifdef SO_NOSIGPIPE
+ if (setsockopt(sfd, SOL_SOCKET, SO_NOSIGPIPE, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ socket_close(sfd);
+ return -1;
+ }
+#endif
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ socket_close(sfd);
+ return -1;
+ }
+
+#ifdef WIN32
+ ioctlsocket(sfd, FIONBIO, &l_yes);
+#else
+ int flags = fcntl(sfd, F_GETFL, 0);
+ fcntl(sfd, F_SETFL, flags | O_NONBLOCK);
+#endif
+
+ do {
+ if (connect(sfd, addr, addrlen) != -1) {
+ break;
+ }
+#ifdef WIN32
+ if (WSAGetLastError() == WSAEWOULDBLOCK)
+#else
+ if (errno == EINPROGRESS)
+#endif
+ {
+ fd_set fds;
+ FD_ZERO(&fds);
+ FD_SET(sfd, &fds);
+
+ struct timeval timeout;
+ timeout.tv_sec = CONNECT_TIMEOUT / 1000;
+ timeout.tv_usec = (CONNECT_TIMEOUT - (timeout.tv_sec * 1000)) * 1000;
+ if (select(sfd + 1, NULL, &fds, NULL, &timeout) == 1) {
+ int so_error;
+ socklen_t len = sizeof(so_error);
+ getsockopt(sfd, SOL_SOCKET, SO_ERROR, (void*)&so_error, &len);
+ if (so_error == 0) {
+ errno = 0;
+ break;
+ }
+ errno = so_error;
+ }
+ }
+ socket_close(sfd);
+ sfd = -1;
+ } while (0);
+
+ if (sfd < 0) {
+ if (verbose >= 2) {
+ char addrtxt[48];
+ socket_addr_to_string(addr, addrtxt, sizeof(addrtxt));
+ fprintf(stderr, "%s: Could not connect to %s port %d\n", __func__, addrtxt, port);
+ }
+ return -1;
+ }
+
+ if (setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, (void*)&yes, sizeof(int)) == -1) {
+ perror("Could not set TCP_NODELAY on socket");
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_SNDBUF, (void*)&bufsize, sizeof(int)) == -1) {
+ perror("Could not set send buffer for socket");
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_RCVBUF, (void*)&bufsize, sizeof(int)) == -1) {
+ perror("Could not set receive buffer for socket");
+ }
+
+ return sfd;
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_connect(const char *addr, uint16_t port)
+{
+ int sfd = -1;
+ int yes = 1;
+ int bufsize = 0x20000;
+ struct addrinfo hints;
+ struct addrinfo *result, *rp;
+ char portstr[8];
+ int res;
+#ifdef WIN32
+ u_long l_yes = 1;
+ WSADATA wsa_data;
+ if (!wsa_init) {
+ if (WSAStartup(MAKEWORD(2,2), &wsa_data) != ERROR_SUCCESS) {
+ fprintf(stderr, "WSAStartup failed!\n");
+ ExitProcess(-1);
+ }
+ wsa_init = 1;
+ }
+#else
+ int flags = 0;
+#endif
+
+ if (!addr) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ memset(&hints, '\0', sizeof(struct addrinfo));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_NUMERICSERV;
+ hints.ai_protocol = IPPROTO_TCP;
+
+ sprintf(portstr, "%d", port);
+
+ res = getaddrinfo(addr, portstr, &hints, &result);
+ if (res != 0) {
+ fprintf(stderr, "%s: getaddrinfo: %s\n", __func__, gai_strerror(res));
+ return -1;
+ }
+
+ for (rp = result; rp != NULL; rp = rp->ai_next) {
+ sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+ if (sfd == -1) {
+ continue;
+ }
+
+#ifdef SO_NOSIGPIPE
+ if (setsockopt(sfd, SOL_SOCKET, SO_NOSIGPIPE, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ socket_close(sfd);
+ return -1;
+ }
+#endif
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, (void*)&yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ socket_close(sfd);
+ continue;
+ }
+
+#ifdef WIN32
+ ioctlsocket(sfd, FIONBIO, &l_yes);
+#else
+ flags = fcntl(sfd, F_GETFL, 0);
+ fcntl(sfd, F_SETFL, flags | O_NONBLOCK);
+#endif
+
+ if (connect(sfd, rp->ai_addr, rp->ai_addrlen) != -1) {
+ break;
+ }
+#ifdef WIN32
+ if (WSAGetLastError() == WSAEWOULDBLOCK)
+#else
+ if (errno == EINPROGRESS)
+#endif
+ {
+ fd_set fds;
+ FD_ZERO(&fds);
+ FD_SET(sfd, &fds);
+
+ struct timeval timeout;
+ timeout.tv_sec = CONNECT_TIMEOUT / 1000;
+ timeout.tv_usec = (CONNECT_TIMEOUT - (timeout.tv_sec * 1000)) * 1000;
+ if (select(sfd + 1, NULL, &fds, NULL, &timeout) == 1) {
+ int so_error;
+ socklen_t len = sizeof(so_error);
+ getsockopt(sfd, SOL_SOCKET, SO_ERROR, (void*)&so_error, &len);
+ if (so_error == 0) {
+ break;
+ }
+ }
+ }
+ socket_close(sfd);
+ }
+
+ freeaddrinfo(result);
+
+ if (rp == NULL) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: Could not connect to %s:%d\n", __func__, addr, port);
+ return -1;
+ }
+
+ if (setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, (void*)&yes, sizeof(int)) == -1) {
+ perror("Could not set TCP_NODELAY on socket");
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_SNDBUF, (void*)&bufsize, sizeof(int)) == -1) {
+ perror("Could not set send buffer for socket");
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_RCVBUF, (void*)&bufsize, sizeof(int)) == -1) {
+ perror("Could not set receive buffer for socket");
+ }
+
+ return sfd;
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_check_fd(int fd, fd_mode fdm, unsigned int timeout)
+{
+ fd_set fds;
+ int sret;
+ int eagain;
+ struct timeval to;
+ struct timeval *pto;
+
+ if (fd < 0) {
+ if (verbose >= 2)
+ fprintf(stderr, "ERROR: invalid fd in check_fd %d\n", fd);
+ return -1;
+ }
+
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+
+ sret = -1;
+
+ do {
+ if (timeout > 0) {
+ to.tv_sec = (time_t) (timeout / 1000);
+ to.tv_usec = (time_t) ((timeout - (to.tv_sec * 1000)) * 1000);
+ pto = &to;
+ } else {
+ pto = NULL;
+ }
+ eagain = 0;
+ switch (fdm) {
+ case FDM_READ:
+ sret = select(fd + 1, &fds, NULL, NULL, pto);
+ break;
+ case FDM_WRITE:
+ sret = select(fd + 1, NULL, &fds, NULL, pto);
+ break;
+ case FDM_EXCEPT:
+ sret = select(fd + 1, NULL, NULL, &fds, pto);
+ break;
+ default:
+ return -1;
+ }
+
+ if (sret < 0) {
+ switch (errno) {
+ case EINTR:
+ // interrupt signal in select
+ if (verbose >= 2)
+ fprintf(stderr, "%s: EINTR\n", __func__);
+ eagain = 1;
+ break;
+ case EAGAIN:
+ if (verbose >= 2)
+ fprintf(stderr, "%s: EAGAIN\n", __func__);
+ break;
+ default:
+ if (verbose >= 2)
+ fprintf(stderr, "%s: select failed: %s\n", __func__,
+ strerror(errno));
+ return -1;
+ }
+ } else if (sret == 0) {
+ return -ETIMEDOUT;
+ }
+ } while (eagain);
+
+ return sret;
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_accept(int fd, uint16_t port)
+{
+#ifdef WIN32
+ int addr_len;
+#else
+ socklen_t addr_len;
+#endif
+ int result;
+ struct sockaddr_storage addr;
+ addr_len = sizeof(addr);
+
+ result = accept(fd, (struct sockaddr*)&addr, &addr_len);
+
+ return result;
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_shutdown(int fd, int how)
+{
+ return shutdown(fd, how);
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_close(int fd) {
+#ifdef WIN32
+ return closesocket(fd);
+#else
+ return close(fd);
+#endif
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_receive(int fd, void *data, size_t length)
+{
+ return socket_receive_timeout(fd, data, length, 0, RECV_TIMEOUT);
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_peek(int fd, void *data, size_t length)
+{
+ return socket_receive_timeout(fd, data, length, MSG_PEEK, RECV_TIMEOUT);
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_receive_timeout(int fd, void *data, size_t length, int flags, unsigned int timeout)
+{
+ int res;
+ int result;
+
+ // check if data is available
+ res = socket_check_fd(fd, FDM_READ, timeout);
+ if (res <= 0) {
+ return res;
+ }
+ // if we get here, there _is_ data available
+ result = recv(fd, data, length, flags);
+ if (res > 0 && result == 0) {
+ // but this is an error condition
+ if (verbose >= 3)
+ fprintf(stderr, "%s: fd=%d recv returned 0\n", __func__, fd);
+ return -ECONNRESET;
+ }
+ if (result < 0) {
+ return -errno;
+ }
+ return result;
+}
+
+LIBIMOBILEDEVICE_GLUE_API int socket_send(int fd, void *data, size_t length)
+{
+ int flags = 0;
+ int res = socket_check_fd(fd, FDM_WRITE, SEND_TIMEOUT);
+ if (res <= 0) {
+ return res;
+ }
+#ifdef MSG_NOSIGNAL
+ flags |= MSG_NOSIGNAL;
+#endif
+ return send(fd, data, length, flags);
+}
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