12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211 |
- /* Copyright (C) 2014 Stony Brook University
- This file is part of Graphene Library OS.
- Graphene Library OS 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 3 of the
- License, or (at your option) any later version.
- Graphene Library OS 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 program. If not, see <http://www.gnu.org/licenses/>. */
- /*
- * db_socket.c
- *
- * This file contains operands for streams with URIs that start with
- * "tcp:", "tcp.srv:", "udp:", "udp.srv:".
- */
- #include <linux/poll.h>
- #include <linux/types.h>
- #include "api.h"
- #include "pal.h"
- #include "pal_debug.h"
- #include "pal_defs.h"
- #include "pal_error.h"
- #include "pal_internal.h"
- #include "pal_linux.h"
- #include "pal_linux_defs.h"
- #include "pal_security.h"
- typedef __kernel_pid_t pid_t;
- #include <asm/errno.h>
- #include <asm/fcntl.h>
- #include <linux/in.h>
- #include <linux/in6.h>
- #include <linux/time.h>
- #include <netinet/tcp.h>
- #include <sys/socket.h>
- #ifndef SOL_TCP
- #define SOL_TCP 6
- #endif
- #ifndef TCP_NODELAY
- #define TCP_NODELAY 1
- #endif
- #ifndef TCP_CORK
- #define TCP_CORK 3
- #endif
- /* 96 bytes is the minimal size of buffer to store a IPv4/IPv6
- address */
- #define PAL_SOCKADDR_SIZE 96
- static size_t addr_size(const struct sockaddr* addr) {
- switch (addr->sa_family) {
- case AF_INET:
- return sizeof(struct sockaddr_in);
- case AF_INET6:
- return sizeof(struct sockaddr_in6);
- default:
- return 0;
- }
- }
- /* parsing the string of uri, and fill in the socket address structure.
- the latest pointer of uri, length of socket address are returned. */
- static int inet_parse_uri(char** uri, struct sockaddr* addr, size_t* addrlen) {
- char* tmp = *uri;
- char* end;
- char* addr_str = NULL;
- char* port_str;
- int af;
- void* addr_buf;
- size_t addr_len;
- __be16* port_buf;
- size_t slen;
- if (tmp[0] == '[') {
- /* for IPv6, the address will be in the form of
- "[xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx]:port". */
- struct sockaddr_in6* addr_in6 = (struct sockaddr_in6*)addr;
- slen = sizeof(struct sockaddr_in6);
- memset(addr, 0, slen);
- end = strchr(tmp + 1, ']');
- if (!end || *(end + 1) != ':')
- goto inval;
- addr_str = tmp + 1;
- addr_len = end - tmp - 1;
- port_str = end + 2;
- for (end = port_str; *end >= '0' && *end <= '9'; end++)
- ;
- addr_in6->sin6_family = af = AF_INET6;
- addr_buf = &addr_in6->sin6_addr.s6_addr;
- port_buf = &addr_in6->sin6_port;
- } else {
- /* for IP, the address will be in the form of "x.x.x.x:port". */
- struct sockaddr_in* addr_in = (struct sockaddr_in*)addr;
- slen = sizeof(struct sockaddr_in);
- memset(addr, 0, slen);
- end = strchr(tmp, ':');
- if (!end)
- goto inval;
- addr_str = tmp;
- addr_len = end - tmp;
- port_str = end + 1;
- for (end = port_str; *end >= '0' && *end <= '9'; end++)
- ;
- addr_in->sin_family = af = AF_INET;
- addr_buf = &addr_in->sin_addr.s_addr;
- port_buf = &addr_in->sin_port;
- }
- if (af == AF_INET) {
- if (!inet_pton4(addr_str, addr_len, addr_buf))
- goto inval;
- } else {
- if (!inet_pton6(addr_str, addr_len, addr_buf))
- goto inval;
- }
- *port_buf = __htons(atoi(port_str));
- *uri = *end ? end + 1 : NULL;
- if (addrlen)
- *addrlen = slen;
- return 0;
- inval:
- return -PAL_ERROR_INVAL;
- }
- /* create the string of uri from the given socket address */
- static int inet_create_uri(char* uri, size_t count, struct sockaddr* addr, size_t addrlen) {
- size_t len = 0;
- if (addr->sa_family == AF_INET) {
- if (addrlen != sizeof(struct sockaddr_in))
- return -PAL_ERROR_INVAL;
- struct sockaddr_in* addr_in = (struct sockaddr_in*)addr;
- char* addr = (char*)&addr_in->sin_addr.s_addr;
- /* for IP, the address will be in the form of "x.x.x.x:port". */
- len = snprintf(uri, count, "%u.%u.%u.%u:%u", (unsigned char)addr[0], (unsigned char)addr[1],
- (unsigned char)addr[2], (unsigned char)addr[3], __ntohs(addr_in->sin_port));
- } else if (addr->sa_family == AF_INET6) {
- if (addrlen != sizeof(struct sockaddr_in6))
- return -PAL_ERROR_INVAL;
- struct sockaddr_in6* addr_in6 = (struct sockaddr_in6*)addr;
- unsigned short* addr = (unsigned short*)&addr_in6->sin6_addr.s6_addr;
- /* for IPv6, the address will be in the form of
- "[xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx]:port". */
- len = snprintf(uri, count, "[%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x]:%u", addr[0], addr[1],
- addr[2], addr[3], addr[4], addr[5], addr[6], addr[7],
- __ntohs(addr_in6->sin6_port));
- } else {
- return -PAL_ERROR_INVAL;
- }
- if (len >= count)
- return -PAL_ERROR_TOOLONG;
- return len;
- }
- /* parse the uri for a socket stream. The uri might have both binding
- address and connecting address, or connecting address only. The form
- of uri will be either "bind-addr:bind-port:connect-addr:connect-port"
- or "addr:port". */
- static int socket_parse_uri(char* uri, struct sockaddr** bind_addr, size_t* bind_addrlen,
- struct sockaddr** dest_addr, size_t* dest_addrlen) {
- int ret;
- if (!bind_addr && !dest_addr)
- return 0;
- if (!uri || !(*uri)) {
- if (bind_addr)
- *bind_addr = NULL;
- if (bind_addrlen)
- *bind_addrlen = 0;
- if (dest_addr)
- *dest_addr = NULL;
- if (dest_addrlen)
- *dest_addrlen = 0;
- return 0;
- }
- /* at least parse uri once */
- if ((ret = inet_parse_uri(&uri, bind_addr ? *bind_addr : *dest_addr,
- bind_addr ? bind_addrlen : dest_addrlen)) < 0)
- return ret;
- if (!(bind_addr && dest_addr))
- return 0;
- /* if you reach here, it can only be connection address */
- if (!uri || (ret = inet_parse_uri(&uri, *dest_addr, dest_addrlen)) < 0) {
- *dest_addr = *bind_addr;
- *dest_addrlen = *bind_addrlen;
- *bind_addr = NULL;
- *bind_addrlen = 0;
- }
- return 0;
- }
- /* fill in the PAL handle based on the file descriptors and address given. */
- static inline PAL_HANDLE socket_create_handle(int type, int fd, int options,
- struct sockaddr* bind_addr, size_t bind_addrlen,
- struct sockaddr* dest_addr, size_t dest_addrlen) {
- PAL_HANDLE hdl =
- malloc(HANDLE_SIZE(sock) + (bind_addr ? bind_addrlen : 0) + (dest_addr ? dest_addrlen : 0));
- if (!hdl)
- return NULL;
- memset(hdl, 0, sizeof(struct pal_handle));
- init_handle_hdr(HANDLE_HDR(hdl), type);
- HANDLE_HDR(hdl)->flags |= RFD(0) | (type != pal_type_tcpsrv ? WFD(0) : 0);
- hdl->sock.fd = fd;
- void* addr = (void*)hdl + HANDLE_SIZE(sock);
- if (bind_addr) {
- hdl->sock.bind = (PAL_PTR)addr;
- memcpy(addr, bind_addr, bind_addrlen);
- addr += bind_addrlen;
- } else {
- hdl->sock.bind = (PAL_PTR)NULL;
- }
- if (dest_addr) {
- hdl->sock.conn = (PAL_PTR)addr;
- memcpy(addr, dest_addr, dest_addrlen);
- addr += dest_addrlen;
- } else {
- hdl->sock.conn = (PAL_PTR)NULL;
- }
- hdl->sock.nonblocking = (options & PAL_OPTION_NONBLOCK) ? PAL_TRUE : PAL_FALSE;
- hdl->sock.linger = 0;
- if (type == pal_type_tcpsrv) {
- hdl->sock.receivebuf = 0;
- hdl->sock.sendbuf = 0;
- } else {
- int ret, val;
- socklen_t len = sizeof(int);
- ret = INLINE_SYSCALL(getsockopt, 5, fd, SOL_SOCKET, SO_RCVBUF, &val, &len);
- hdl->sock.receivebuf = IS_ERR(ret) ? 0 : val;
- ret = INLINE_SYSCALL(getsockopt, 5, fd, SOL_SOCKET, SO_SNDBUF, &val, &len);
- hdl->sock.sendbuf = IS_ERR(ret) ? 0 : val;
- }
- hdl->sock.receivetimeout = 0;
- hdl->sock.sendtimeout = 0;
- hdl->sock.tcp_cork = PAL_FALSE;
- hdl->sock.tcp_keepalive = PAL_FALSE;
- hdl->sock.tcp_nodelay = PAL_FALSE;
- return hdl;
- }
- static bool check_zero(void* mem, size_t size) {
- void* p = mem;
- void* q = mem + size;
- while (p < q) {
- if (p <= q - sizeof(long)) {
- if (*(long*)p)
- return false;
- p += sizeof(long);
- } else if (p <= q - sizeof(int)) {
- if (*(int*)p)
- return false;
- p += sizeof(int);
- } else if (p <= q - sizeof(short)) {
- if (*(short*)p)
- return false;
- p += sizeof(short);
- } else {
- if (*(char*)p)
- return false;
- p++;
- }
- }
- return true;
- }
- /* check if an address is "Any" */
- static bool check_any_addr(struct sockaddr* addr) {
- if (addr->sa_family == AF_INET) {
- struct sockaddr_in* addr_in = (struct sockaddr_in*)addr;
- return addr_in->sin_port == 0 && check_zero(&addr_in->sin_addr, sizeof(addr_in->sin_addr));
- } else if (addr->sa_family == AF_INET6) {
- struct sockaddr_in6* addr_in6 = (struct sockaddr_in6*)addr;
- return addr_in6->sin6_port == 0 &&
- check_zero(&addr_in6->sin6_addr, sizeof(addr_in6->sin6_addr));
- }
- return false;
- }
- /* listen on a tcp socket */
- static int tcp_listen(PAL_HANDLE* handle, char* uri, int create, int options) {
- struct sockaddr buffer;
- struct sockaddr* bind_addr = &buffer;
- size_t bind_addrlen;
- int ret, fd = -1;
- if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen, NULL, NULL)) < 0)
- return ret;
- assert(bind_addr);
- assert(bind_addrlen == addr_size(bind_addr));
- #if ALLOW_BIND_ANY == 0
- /* the socket need to have a binding address, a null address or an
- any address is not allowed */
- if (check_any_addr(bind_addr))
- return -PAL_ERROR_INVAL;
- #endif
- fd = INLINE_SYSCALL(socket, 3, bind_addr->sa_family, SOCK_STREAM | SOCK_CLOEXEC | options, 0);
- if (IS_ERR(fd))
- return -PAL_ERROR_DENIED;
- /* must set the socket to be reuseable */
- int reuseaddr = 1;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof(reuseaddr));
- if (IS_ERR(ret))
- return -PAL_ERROR_INVAL;
- if (bind_addr->sa_family == AF_INET6) {
- /* IPV6_V6ONLY socket option can only be set before first bind */
- int ipv6_v6only = create & PAL_CREATE_DUALSTACK ? 0 : 1;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, IPPROTO_IPV6, IPV6_V6ONLY, &ipv6_v6only, sizeof(ipv6_v6only));
- if (IS_ERR(ret))
- return -PAL_ERROR_INVAL;
- }
- ret = INLINE_SYSCALL(bind, 3, fd, bind_addr, bind_addrlen);
- if (IS_ERR(ret)) {
- switch (ERRNO(ret)) {
- case EINVAL:
- ret = -PAL_ERROR_INVAL;
- goto failed;
- case EADDRINUSE:
- ret = -PAL_ERROR_STREAMEXIST;
- goto failed;
- default:
- ret = -PAL_ERROR_DENIED;
- goto failed;
- }
- }
- if (check_any_addr(bind_addr)) {
- /* call getsockname to get socket address */
- if ((ret = INLINE_SYSCALL(getsockname, 3, fd, bind_addr, &bind_addrlen)) < 0)
- goto failed;
- }
- ret = INLINE_SYSCALL(listen, 2, fd, DEFAULT_BACKLOG);
- if (IS_ERR(ret))
- return -PAL_ERROR_DENIED;
- *handle = socket_create_handle(pal_type_tcpsrv, fd, options, bind_addr, bind_addrlen, NULL, 0);
- if (!(*handle)) {
- ret = -PAL_ERROR_NOMEM;
- goto failed;
- }
- return 0;
- failed:
- INLINE_SYSCALL(close, 1, fd);
- return ret;
- }
- /* accept a tcp connection */
- static int tcp_accept(PAL_HANDLE handle, PAL_HANDLE* client) {
- if (!IS_HANDLE_TYPE(handle, tcpsrv) || !handle->sock.bind || handle->sock.conn)
- return -PAL_ERROR_NOTSERVER;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- struct sockaddr* bind_addr = (struct sockaddr*)handle->sock.bind;
- size_t bind_addrlen = addr_size(bind_addr);
- struct sockaddr buffer;
- socklen_t addrlen = sizeof(struct sockaddr);
- int ret = 0;
- int newfd = INLINE_SYSCALL(accept4, 4, handle->sock.fd, &buffer, &addrlen, O_CLOEXEC);
- if (IS_ERR(newfd))
- switch (ERRNO(newfd)) {
- case EWOULDBLOCK:
- return -PAL_ERROR_TRYAGAIN;
- case ECONNABORTED:
- return -PAL_ERROR_STREAMNOTEXIST;
- default:
- return unix_to_pal_error(ERRNO(newfd));
- }
- struct sockaddr* dest_addr = &buffer;
- size_t dest_addrlen = addrlen;
- *client = socket_create_handle(pal_type_tcp, newfd, 0, bind_addr, bind_addrlen, dest_addr,
- dest_addrlen);
- if (!(*client)) {
- ret = -PAL_ERROR_NOMEM;
- goto failed;
- }
- return 0;
- failed:
- INLINE_SYSCALL(close, 1, newfd);
- return ret;
- }
- /* connect on a tcp socket */
- static int tcp_connect(PAL_HANDLE* handle, char* uri, int options) {
- struct sockaddr buffer[3];
- struct sockaddr* bind_addr = buffer;
- struct sockaddr* dest_addr = buffer + 1;
- size_t bind_addrlen, dest_addrlen;
- int ret, fd = -1;
- /* accepting two kind of different uri:
- dest-ip:dest-port or bind-ip:bind-port:dest-ip:dest-port */
- if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen, &dest_addr, &dest_addrlen)) < 0)
- return ret;
- if (!dest_addr)
- return -PAL_ERROR_INVAL;
- if (bind_addr && bind_addr->sa_family != dest_addr->sa_family)
- return -PAL_ERROR_INVAL;
- fd = INLINE_SYSCALL(socket, 3, dest_addr->sa_family, SOCK_STREAM | SOCK_CLOEXEC | options, 0);
- if (IS_ERR(fd))
- return -PAL_ERROR_DENIED;
- if (bind_addr) {
- if (IS_ERR(ret)) {
- INLINE_SYSCALL(close, 1, fd);
- switch (ERRNO(ret)) {
- case EADDRINUSE:
- ret = -PAL_ERROR_STREAMEXIST;
- goto failed;
- case EADDRNOTAVAIL:
- ret = -PAL_ERROR_ADDRNOTEXIST;
- goto failed;
- default:
- ret = unix_to_pal_error(ERRNO(ret));
- goto failed;
- }
- }
- }
- ret = INLINE_SYSCALL(connect, 3, fd, dest_addr, dest_addrlen);
- if (IS_ERR(ret) && ERRNO(ret) == EINPROGRESS) {
- struct pollfd pfd = {.fd = fd, .events = POLLOUT, .revents = 0};
- ret = INLINE_SYSCALL(ppoll, 5, &pfd, 1, NULL, NULL, 0);
- }
- if (IS_ERR(ret)) {
- ret = unix_to_pal_error(ERRNO(ret));
- goto failed;
- }
- if (!bind_addr) {
- /* save some space to get socket address */
- bind_addr = buffer + 2;
- bind_addrlen = sizeof(struct sockaddr);
- /* call getsockname to get socket address */
- if ((ret = INLINE_SYSCALL(getsockname, 3, fd, bind_addr, &bind_addrlen)) < 0)
- bind_addr = NULL;
- }
- *handle = socket_create_handle(pal_type_tcp, fd, options, bind_addr, bind_addrlen, dest_addr,
- dest_addrlen);
- if (!(*handle)) {
- ret = -PAL_ERROR_NOMEM;
- goto failed;
- }
- return 0;
- failed:
- INLINE_SYSCALL(close, 1, fd);
- return ret;
- }
- /* 'open' operation of tcp stream */
- static int tcp_open(PAL_HANDLE* handle, const char* type, const char* uri, int access, int share,
- int create, int options) {
- if (!WITHIN_MASK(access, PAL_ACCESS_MASK) || !WITHIN_MASK(share, PAL_SHARE_MASK) ||
- !WITHIN_MASK(create, PAL_CREATE_MASK))
- return -PAL_ERROR_INVAL;
- size_t uri_len = strlen(uri) + 1;
- if (uri_len > PAL_SOCKADDR_SIZE)
- return -PAL_ERROR_TOOLONG;
- char uri_buf[PAL_SOCKADDR_SIZE];
- memcpy(uri_buf, uri, uri_len);
- if (!strcmp_static(type, URI_TYPE_TCP_SRV))
- return tcp_listen(handle, uri_buf, create, options);
- if (!strcmp_static(type, URI_TYPE_TCP))
- return tcp_connect(handle, uri_buf, options);
- return -PAL_ERROR_NOTSUPPORT;
- }
- /* 'read' operation of tcp stream */
- static int64_t tcp_read(PAL_HANDLE handle, uint64_t offset, size_t len, void* buf) {
- if (offset)
- return -PAL_ERROR_INVAL;
- if (!IS_HANDLE_TYPE(handle, tcp) || !handle->sock.conn)
- return -PAL_ERROR_NOTCONNECTION;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_ENDOFSTREAM;
- struct msghdr hdr;
- struct iovec iov;
- iov.iov_base = buf;
- iov.iov_len = len;
- hdr.msg_name = NULL;
- hdr.msg_namelen = 0;
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
- hdr.msg_control = NULL;
- hdr.msg_controllen = 0;
- hdr.msg_flags = 0;
- int64_t bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
- if (IS_ERR(bytes))
- return unix_to_pal_error(ERRNO(bytes));
- if (!bytes)
- return -PAL_ERROR_ENDOFSTREAM;
- return bytes;
- }
- /* write' operation of tcp stream */
- static int64_t tcp_write(PAL_HANDLE handle, uint64_t offset, size_t len, const void* buf) {
- if (offset)
- return -PAL_ERROR_INVAL;
- if (!IS_HANDLE_TYPE(handle, tcp) || !handle->sock.conn)
- return -PAL_ERROR_NOTCONNECTION;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_CONNFAILED;
- struct msghdr hdr;
- struct iovec iov;
- iov.iov_base = (void*)buf;
- iov.iov_len = len;
- hdr.msg_name = NULL;
- hdr.msg_namelen = 0;
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
- hdr.msg_control = NULL;
- hdr.msg_controllen = 0;
- hdr.msg_flags = 0;
- int64_t bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
- if (IS_ERR(bytes))
- bytes = unix_to_pal_error(ERRNO(bytes));
- return bytes;
- }
- /* used by 'open' operation of tcp stream for bound socket */
- static int udp_bind(PAL_HANDLE* handle, char* uri, int create, int options) {
- struct sockaddr buffer;
- struct sockaddr* bind_addr = &buffer;
- size_t bind_addrlen;
- int ret = 0, fd = -1;
- if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen, NULL, NULL)) < 0)
- return ret;
- assert(bind_addr);
- assert(bind_addrlen == addr_size(bind_addr));
- #if ALLOW_BIND_ANY == 0
- /* the socket need to have a binding address, a null address or an
- any address is not allowed */
- if (check_any_addr(bind_addr))
- return -PAL_ERROR_INVAL;
- #endif
- fd = INLINE_SYSCALL(socket, 3, bind_addr->sa_family, SOCK_DGRAM | SOCK_CLOEXEC | options, 0);
- if (IS_ERR(fd))
- return -PAL_ERROR_DENIED;
- /* IPV6_V6ONLY socket option can only be set before first bind */
- if (bind_addr->sa_family == AF_INET6) {
- int ipv6_v6only = create & PAL_CREATE_DUALSTACK ? 0 : 1;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, IPPROTO_IPV6, IPV6_V6ONLY, &ipv6_v6only, sizeof(ipv6_v6only));
- if (IS_ERR(ret))
- return -PAL_ERROR_INVAL;
- }
- ret = INLINE_SYSCALL(bind, 3, fd, bind_addr, bind_addrlen);
- if (IS_ERR(ret)) {
- switch (ERRNO(ret)) {
- case EADDRINUSE:
- ret = -PAL_ERROR_STREAMEXIST;
- goto failed;
- case EADDRNOTAVAIL:
- ret = -PAL_ERROR_ADDRNOTEXIST;
- goto failed;
- default:
- ret = unix_to_pal_error(ERRNO(ret));
- goto failed;
- }
- }
- *handle = socket_create_handle(pal_type_udpsrv, fd, options, bind_addr, bind_addrlen, NULL, 0);
- if (!(*handle)) {
- ret = -ENOMEM;
- goto failed;
- }
- return 0;
- failed:
- INLINE_SYSCALL(close, 1, fd);
- return ret;
- }
- /* used by 'open' operation of tcp stream for connected socket */
- static int udp_connect(PAL_HANDLE* handle, char* uri, int create, int options) {
- struct sockaddr buffer[2];
- struct sockaddr* bind_addr = buffer;
- struct sockaddr* dest_addr = buffer + 1;
- size_t bind_addrlen, dest_addrlen;
- int ret, fd = -1;
- if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen, &dest_addr, &dest_addrlen)) < 0)
- return ret;
- #if ALLOW_BIND_ANY == 0
- /* the socket need to have a binding address, a null address or an
- any address is not allowed */
- if (bind_addr && check_any_addr(bind_addr))
- return -PAL_ERROR_INVAL;
- #endif
- fd = INLINE_SYSCALL(socket, 3, dest_addr ? dest_addr->sa_family : AF_INET,
- SOCK_DGRAM | SOCK_CLOEXEC | options, 0);
- if (IS_ERR(fd))
- return -PAL_ERROR_DENIED;
- if (bind_addr) {
- if (bind_addr->sa_family == AF_INET6) {
- /* IPV6_V6ONLY socket option can only be set before first bind */
- int ipv6_v6only = create & PAL_CREATE_DUALSTACK ? 0 : 1;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, IPPROTO_IPV6, IPV6_V6ONLY, &ipv6_v6only,
- sizeof(ipv6_v6only));
- if (IS_ERR(ret))
- return -PAL_ERROR_INVAL;
- }
- ret = INLINE_SYSCALL(bind, 3, fd, bind_addr, bind_addrlen);
- if (IS_ERR(ret)) {
- switch (ERRNO(ret)) {
- case EADDRINUSE:
- ret = -PAL_ERROR_STREAMEXIST;
- goto failed;
- case EADDRNOTAVAIL:
- ret = -PAL_ERROR_ADDRNOTEXIST;
- goto failed;
- default:
- ret = unix_to_pal_error(ERRNO(ret));
- goto failed;
- }
- }
- }
- *handle = socket_create_handle(dest_addr ? pal_type_udp : pal_type_udpsrv, fd, options,
- bind_addr, bind_addrlen, dest_addr, dest_addrlen);
- if (!(*handle)) {
- ret = -ENOMEM;
- goto failed;
- }
- return 0;
- failed:
- INLINE_SYSCALL(close, 1, fd);
- return ret;
- }
- static int udp_open(PAL_HANDLE* hdl, const char* type, const char* uri, int access, int share,
- int create, int options) {
- if (!WITHIN_MASK(access, PAL_ACCESS_MASK) || !WITHIN_MASK(share, PAL_SHARE_MASK) ||
- !WITHIN_MASK(create, PAL_CREATE_MASK) || !WITHIN_MASK(options, PAL_OPTION_MASK))
- return -PAL_ERROR_INVAL;
- char buf[PAL_SOCKADDR_SIZE];
- size_t len = strlen(uri);
- if (len >= PAL_SOCKADDR_SIZE)
- return -PAL_ERROR_TOOLONG;
- memcpy(buf, uri, len + 1);
- if (!strcmp_static(type, URI_TYPE_UDP_SRV))
- return udp_bind(hdl, buf, create, options);
- if (!strcmp_static(type, URI_TYPE_UDP))
- return udp_connect(hdl, buf, create, options);
- return -PAL_ERROR_NOTSUPPORT;
- }
- static int64_t udp_receive(PAL_HANDLE handle, uint64_t offset, size_t len, void* buf) {
- if (offset)
- return -PAL_ERROR_INVAL;
- if (!IS_HANDLE_TYPE(handle, udp))
- return -PAL_ERROR_NOTCONNECTION;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- struct msghdr hdr;
- struct iovec iov;
- iov.iov_base = buf;
- iov.iov_len = len;
- hdr.msg_name = NULL;
- hdr.msg_namelen = 0;
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
- hdr.msg_control = NULL;
- hdr.msg_controllen = 0;
- hdr.msg_flags = 0;
- int64_t bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
- if (IS_ERR(bytes))
- return unix_to_pal_error(ERRNO(bytes));
- return bytes;
- }
- static int64_t udp_receivebyaddr(PAL_HANDLE handle, uint64_t offset, size_t len, void* buf,
- char* addr, size_t addrlen) {
- if (offset)
- return -PAL_ERROR_INVAL;
- if (!IS_HANDLE_TYPE(handle, udpsrv))
- return -PAL_ERROR_NOTCONNECTION;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- struct sockaddr conn_addr;
- socklen_t conn_addrlen = sizeof(struct sockaddr);
- struct msghdr hdr;
- struct iovec iov;
- iov.iov_base = buf;
- iov.iov_len = len;
- hdr.msg_name = &conn_addr;
- hdr.msg_namelen = conn_addrlen;
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
- hdr.msg_control = NULL;
- hdr.msg_controllen = 0;
- hdr.msg_flags = 0;
- int64_t bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
- if (IS_ERR(bytes))
- return unix_to_pal_error(ERRNO(bytes));
- char* addr_uri = strcpy_static(addr, URI_PREFIX_UDP, addrlen);
- if (!addr_uri)
- return -PAL_ERROR_OVERFLOW;
- int ret = inet_create_uri(addr_uri, addr + addrlen - addr_uri, &conn_addr, hdr.msg_namelen);
- if (ret < 0)
- return ret;
- return bytes;
- }
- static int64_t udp_send(PAL_HANDLE handle, uint64_t offset, size_t len, const void* buf) {
- if (offset)
- return -PAL_ERROR_INVAL;
- if (!IS_HANDLE_TYPE(handle, udp))
- return -PAL_ERROR_NOTCONNECTION;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- struct msghdr hdr;
- struct iovec iov;
- iov.iov_base = (void*)buf;
- iov.iov_len = len;
- hdr.msg_name = (void*)handle->sock.conn;
- hdr.msg_namelen = addr_size((struct sockaddr*)handle->sock.conn);
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
- hdr.msg_control = NULL;
- hdr.msg_controllen = 0;
- hdr.msg_flags = 0;
- int64_t bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
- if (IS_ERR(bytes))
- bytes = unix_to_pal_error(ERRNO(bytes));
- return bytes;
- }
- static int64_t udp_sendbyaddr(PAL_HANDLE handle, uint64_t offset, size_t len, const void* buf,
- const char* addr, size_t addrlen) {
- if (offset)
- return -PAL_ERROR_INVAL;
- if (!IS_HANDLE_TYPE(handle, udpsrv))
- return -PAL_ERROR_NOTCONNECTION;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- if (!strstartswith_static(addr, URI_PREFIX_UDP))
- return -PAL_ERROR_INVAL;
- addr += static_strlen(URI_PREFIX_UDP);
- addrlen -= static_strlen(URI_PREFIX_UDP);
- char* addrbuf = __alloca(addrlen);
- memcpy(addrbuf, addr, addrlen);
- struct sockaddr conn_addr;
- size_t conn_addrlen;
- int ret = inet_parse_uri(&addrbuf, &conn_addr, &conn_addrlen);
- if (ret < 0)
- return ret;
- struct msghdr hdr;
- struct iovec iov;
- iov.iov_base = (void*)buf;
- iov.iov_len = len;
- hdr.msg_name = &conn_addr;
- hdr.msg_namelen = conn_addrlen;
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
- hdr.msg_control = NULL;
- hdr.msg_controllen = 0;
- hdr.msg_flags = 0;
- int64_t bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
- if (IS_ERR(bytes))
- bytes = unix_to_pal_error(ERRNO(bytes));
- return bytes;
- }
- static int socket_delete(PAL_HANDLE handle, int access) {
- if (handle->sock.fd == PAL_IDX_POISON)
- return 0;
- if (!IS_HANDLE_TYPE(handle, tcp) && access)
- return -PAL_ERROR_INVAL;
- if (IS_HANDLE_TYPE(handle, tcp) || IS_HANDLE_TYPE(handle, tcpsrv)) {
- int shutdown;
- switch (access) {
- case 0:
- shutdown = SHUT_RDWR;
- break;
- case PAL_DELETE_RD:
- shutdown = SHUT_RD;
- break;
- case PAL_DELETE_WR:
- shutdown = SHUT_WR;
- break;
- default:
- return -PAL_ERROR_INVAL;
- }
- INLINE_SYSCALL(shutdown, 2, handle->sock.fd, shutdown);
- }
- return 0;
- }
- struct __kernel_linger {
- int l_onoff;
- int l_linger;
- };
- static int socket_close(PAL_HANDLE handle) {
- if (handle->sock.fd != PAL_IDX_POISON) {
- INLINE_SYSCALL(close, 1, handle->sock.fd);
- handle->sock.fd = PAL_IDX_POISON;
- }
- if (handle->sock.bind)
- handle->sock.bind = (PAL_PTR)NULL;
- if (handle->sock.conn)
- handle->sock.conn = (PAL_PTR)NULL;
- return 0;
- }
- static int socket_attrquerybyhdl(PAL_HANDLE handle, PAL_STREAM_ATTR* attr) {
- int ret;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- attr->handle_type = HANDLE_HDR(handle)->type;
- attr->nonblocking = handle->sock.nonblocking;
- attr->disconnected = HANDLE_HDR(handle)->flags & ERROR(0);
- attr->socket.linger = handle->sock.linger;
- attr->socket.receivebuf = handle->sock.receivebuf;
- attr->socket.sendbuf = handle->sock.sendbuf;
- attr->socket.receivetimeout = handle->sock.receivetimeout;
- attr->socket.sendtimeout = handle->sock.sendtimeout;
- attr->socket.tcp_cork = handle->sock.tcp_cork;
- attr->socket.tcp_keepalive = handle->sock.tcp_keepalive;
- attr->socket.tcp_nodelay = handle->sock.tcp_nodelay;
- /* get number of bytes available for reading (doesn't make sense for listening sockets) */
- attr->pending_size = 0;
- if (!IS_HANDLE_TYPE(handle, tcpsrv)) {
- int val;
- ret = INLINE_SYSCALL(ioctl, 3, handle->sock.fd, FIONREAD, &val);
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- attr->pending_size = val;
- }
- /* query if there is data available for reading */
- struct pollfd pfd = {.fd = handle->sock.fd, .events = POLLIN | POLLOUT, .revents = 0};
- struct timespec tp = {0, 0};
- ret = INLINE_SYSCALL(ppoll, 5, &pfd, 1, &tp, NULL, 0);
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- attr->readable = ret == 1 && (pfd.revents & (POLLIN | POLLERR | POLLHUP)) == POLLIN;
- attr->writable = ret == 1 && (pfd.revents & (POLLOUT | POLLERR | POLLHUP)) == POLLOUT;
- return 0;
- }
- static int socket_attrsetbyhdl(PAL_HANDLE handle, PAL_STREAM_ATTR* attr) {
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- int fd = handle->sock.fd, ret, val;
- if (attr->nonblocking != handle->sock.nonblocking) {
- ret = INLINE_SYSCALL(fcntl, 3, fd, F_SETFL, attr->nonblocking ? O_NONBLOCK : 0);
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.nonblocking = attr->nonblocking;
- }
- if (IS_HANDLE_TYPE(handle, tcpsrv)) {
- if (attr->socket.linger != handle->sock.linger) {
- struct __kernel_linger l;
- l.l_onoff = attr->socket.linger ? 1 : 0;
- l.l_linger = attr->socket.linger;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_LINGER, &l,
- sizeof(struct __kernel_linger));
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.linger = attr->socket.linger;
- }
- if (attr->socket.receivebuf != handle->sock.receivebuf) {
- int val = attr->socket.receivebuf;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof(int));
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.receivebuf = attr->socket.receivebuf;
- }
- if (attr->socket.sendbuf != handle->sock.sendbuf) {
- int val = attr->socket.sendbuf;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof(int));
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.sendbuf = attr->socket.sendbuf;
- }
- if (attr->socket.receivetimeout != handle->sock.receivetimeout) {
- int val = attr->socket.receivetimeout;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_RCVTIMEO, &val, sizeof(int));
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.receivetimeout = attr->socket.receivetimeout;
- }
- if (attr->socket.sendtimeout != handle->sock.sendtimeout) {
- int val = attr->socket.sendtimeout;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_SNDTIMEO, &val, sizeof(int));
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.sendtimeout = attr->socket.sendtimeout;
- }
- }
- if (IS_HANDLE_TYPE(handle, tcp) || IS_HANDLE_TYPE(handle, tcpsrv)) {
- if (attr->socket.tcp_cork != handle->sock.tcp_cork) {
- val = attr->socket.tcp_cork ? 1 : 0;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_TCP, TCP_CORK, &val, sizeof(int));
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.tcp_cork = attr->socket.tcp_cork;
- }
- if (attr->socket.tcp_keepalive != handle->sock.tcp_keepalive) {
- val = attr->socket.tcp_keepalive ? 1 : 0;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof(int));
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.tcp_keepalive = attr->socket.tcp_keepalive;
- }
- if (attr->socket.tcp_nodelay != handle->sock.tcp_nodelay) {
- val = attr->socket.tcp_nodelay ? 1 : 0;
- ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_TCP, TCP_NODELAY, &val, sizeof(int));
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- handle->sock.tcp_nodelay = attr->socket.tcp_nodelay;
- }
- }
- return 0;
- }
- static int socket_getname(PAL_HANDLE handle, char* buffer, size_t count) {
- size_t orig_count = count;
- int ret;
- const char* prefix = NULL;
- size_t prefix_len = 0;
- struct sockaddr* bind_addr = NULL;
- struct sockaddr* dest_addr = NULL;
- switch (PAL_GET_TYPE(handle)) {
- case pal_type_tcpsrv:
- prefix_len = static_strlen(URI_PREFIX_TCP_SRV);
- prefix = URI_PREFIX_TCP_SRV;
- bind_addr = (struct sockaddr*)handle->sock.bind;
- break;
- case pal_type_tcp:
- prefix_len = static_strlen(URI_PREFIX_TCP);
- prefix = URI_PREFIX_TCP;
- bind_addr = (struct sockaddr*)handle->sock.bind;
- dest_addr = (struct sockaddr*)handle->sock.conn;
- break;
- case pal_type_udpsrv:
- prefix_len = static_strlen(URI_PREFIX_UDP_SRV);
- prefix = URI_PREFIX_UDP_SRV;
- bind_addr = (struct sockaddr*)handle->sock.bind;
- break;
- case pal_type_udp:
- prefix_len = static_strlen(URI_PREFIX_UDP);
- prefix = URI_PREFIX_UDP;
- bind_addr = (struct sockaddr*)handle->sock.bind;
- dest_addr = (struct sockaddr*)handle->sock.conn;
- break;
- default:
- return -PAL_ERROR_INVAL;
- }
- if (count < prefix_len + 1) {
- return -PAL_ERROR_OVERFLOW;
- }
- memcpy(buffer, prefix, prefix_len + 1);
- buffer += prefix_len;
- count -= prefix_len;
- if (bind_addr) {
- if ((ret = inet_create_uri(buffer, count, bind_addr, addr_size(bind_addr))) < 0) {
- return ret;
- }
- buffer += ret;
- count -= ret;
- }
- if (dest_addr) {
- if (bind_addr) {
- if (count < 2) {
- return -PAL_ERROR_OVERFLOW;
- }
- *buffer++ = ':';
- *buffer = '\0';
- count--;
- }
- if ((ret = inet_create_uri(buffer, count, dest_addr, addr_size(dest_addr))) < 0) {
- return ret;
- }
- buffer += ret;
- count -= ret;
- }
- return orig_count - count;
- }
- struct handle_ops tcp_ops = {
- .getname = &socket_getname,
- .open = &tcp_open,
- .waitforclient = &tcp_accept,
- .read = &tcp_read,
- .write = &tcp_write,
- .delete = &socket_delete,
- .close = &socket_close,
- .attrquerybyhdl = &socket_attrquerybyhdl,
- .attrsetbyhdl = &socket_attrsetbyhdl,
- };
- struct handle_ops udp_ops = {
- .getname = &socket_getname,
- .open = &udp_open,
- .read = &udp_receive,
- .write = &udp_send,
- .delete = &socket_delete,
- .close = &socket_close,
- .attrquerybyhdl = &socket_attrquerybyhdl,
- .attrsetbyhdl = &socket_attrsetbyhdl,
- };
- struct handle_ops udpsrv_ops = {
- .getname = &socket_getname,
- .open = &udp_open,
- .readbyaddr = &udp_receivebyaddr,
- .writebyaddr = &udp_sendbyaddr,
- .delete = &socket_delete,
- .close = &socket_close,
- .attrquerybyhdl = &socket_attrquerybyhdl,
- .attrsetbyhdl = &socket_attrsetbyhdl,
- };
|