From 046b26150e004a8ac740e699c6c3e11be29e8f11 Mon Sep 17 00:00:00 2001 From: Nikias Bassen Date: Mon, 7 Jun 2021 02:01:35 +0200 Subject: Initial check-in of sources --- src/socket.c | 1169 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1169 insertions(+) create mode 100644 src/socket.c (limited to 'src/socket.c') diff --git a/src/socket.c b/src/socket.c new file mode 100644 index 0000000..067ef41 --- /dev/null +++ b/src/socket.c @@ -0,0 +1,1169 @@ +/* + * socket.c + * + * Copyright (C) 2012-2020 Nikias Bassen + * Copyright (C) 2012 Martin Szulecki + * + * 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 +#endif +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef WIN32 +#include +#include +#include +#ifndef HAVE_GETIFADDRS +#include +#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 +#include +#include +#include +#include +#include +#include +#ifdef AF_INET6 +#include +#include +#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); +} -- cgit v1.1-32-gdbae