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- /* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
- /* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */
- /* Copyright (C) 2014 OSCAR lab, 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 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 General Public License for more details.
- You should have received a copy of the GNU 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 "pal_defs.h"
- #include "pal_linux_defs.h"
- #include "pal.h"
- #include "pal_internal.h"
- #include "pal_linux.h"
- #include "pal_debug.h"
- #include "pal_security.h"
- #include "pal_error.h"
- #include "api.h"
- #include "graphene.h"
- #include <linux/types.h>
- #include <linux/poll.h>
- typedef __kernel_pid_t pid_t;
- #include <asm/fcntl.h>
- #include <sys/socket.h>
- #include <linux/in.h>
- #include <linux/in6.h>
- #include <netinet/tcp.h>
- #include <asm/errno.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
- #ifndef SOL_IPV6
- # define SOL_IPV6 41
- #endif
- /* 96 bytes is the minimal size of buffer to store a IPv4/IPv6
- address */
- #define PAL_SOCKADDR_SIZE 96
- static inline int addr_size (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, int * addrlen)
- {
- char * tmp = *uri, * end;
- char * addr_str = NULL, * port_str;
- int af;
- void * addr_buf;
- int addr_len;
- __be16 * port_buf;
- int 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, int count, struct sockaddr * addr,
- int addrlen)
- {
- int 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, int * bind_addrlen,
- struct sockaddr ** dest_addr, int * dest_addrlen)
- {
- int ret;
- if (!bind_addr && !dest_addr)
- return 0;
- if (!uri || !(*uri)) {
- if (bind_addr)
- *bind_addr = NULL;
- if (dest_addr)
- *dest_addr = NULL;
- 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, int bind_addrlen,
- struct sockaddr * dest_addr, int 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(union pal_handle));
- PAL_GET_TYPE(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, 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 int check_zero (void * mem, int size)
- {
- void * p = mem, * q = mem + size;
- while (p < q) {
- if (p <= q - sizeof(long)) {
- if (*(long *) p)
- return 1;
- p += sizeof(long);
- } else if (p <= q - sizeof(int)) {
- if (*(int *) p)
- return 1;
- p += sizeof(int);
- } else if (p <= q - sizeof(short)) {
- if (*(short *) p)
- return 1;
- p += sizeof(short);
- } else {
- if (*(char *) p)
- return 1;
- p++;
- }
- }
- return 0;
- }
- /* check if an address is "Any" */
- static int addr_check_any (struct sockaddr * addr)
- {
- if (addr->sa_family == AF_INET) {
- struct sockaddr_in * addr_in =
- (struct sockaddr_in *) addr;
- return addr_in->sin_port ||
- 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 ||
- check_zero(&addr_in6->sin6_addr,
- sizeof(addr_in6->sin6_addr));
- }
- return -PAL_ERROR_NOTSUPPORT;
- }
- /* listen on a tcp socket */
- static int tcp_listen (PAL_HANDLE * handle, char * uri, int options)
- {
- struct sockaddr buffer, * bind_addr = &buffer;
- int bind_addrlen;
- int ret, fd = -1;
- if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen,
- NULL, NULL)) < 0)
- return ret;
- /* the socket need to have a binding address, a null address or an
- any address is not allowed */
- if (!bind_addr || addr_check_any(bind_addr) == 0)
- return -PAL_ERROR_INVAL;
- fd = INLINE_SYSCALL(socket, 3, bind_addr->sa_family,
- SOCK_STREAM|SOCK_CLOEXEC|options, 0);
- if (IS_ERR(fd))
- return -PAL_ERROR_DENIED;
- if (bind_addr->sa_family == AF_INET6) {
- int ipv6only = 1;
- INLINE_SYSCALL(setsockopt, 5, fd, SOL_IPV6, IPV6_V6ONLY, &ipv6only,
- sizeof(int));
- }
- /* must set the socket to be reuseable */
- int reuseaddr = 1;
- INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
- sizeof(int));
- 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;
- }
- }
- 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;
- int 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;
- int 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, * dest_addr = buffer + 1;
- int 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;
- }
- }
- }
- if (dest_addr->sa_family == AF_INET6) {
- int ipv6only = 1;
- INLINE_SYSCALL(setsockopt, 5, fd, SOL_IPV6, IPV6_V6ONLY, &ipv6only,
- sizeof(int));
- }
- 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)
- {
- int 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 (strpartcmp_static(type, "tcp.srv:"))
- return tcp_listen(handle, uri_buf, options);
- if (strpartcmp_static(type, "tcp:"))
- return tcp_connect(handle, uri_buf, options);
- return -PAL_ERROR_NOTSUPPORT;
- }
- /* 'read' operation of tcp stream */
- static int tcp_read (PAL_HANDLE handle, int offset, int len, void * buf)
- {
- 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;
- int bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
- if (IS_ERR(bytes))
- switch (ERRNO(bytes)) {
- case EWOULDBLOCK:
- return -PAL_ERROR_TRYAGAIN;
- default:
- return unix_to_pal_error(ERRNO(bytes));
- }
- if (!bytes)
- return -PAL_ERROR_ENDOFSTREAM;
- return bytes;
- }
- /* write' operation of tcp stream */
- static int tcp_write (PAL_HANDLE handle, int offset, int len, const void * buf)
- {
- 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;
- int bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
- if (IS_ERR(bytes))
- switch(ERRNO(bytes)) {
- case ECONNRESET:
- case EPIPE:
- return -PAL_ERROR_CONNFAILED;
- case EWOULDBLOCK:
- HANDLE_HDR(handle)->flags &= ~WRITEABLE(0);
- return -PAL_ERROR_TRYAGAIN;
- default:
- return unix_to_pal_error(ERRNO(bytes));
- }
- if (bytes == len)
- HANDLE_HDR(handle)->flags |= WRITEABLE(0);
- else
- HANDLE_HDR(handle)->flags &= ~WRITEABLE(0);
- return bytes;
- }
- /* used by 'open' operation of tcp stream for bound socket */
- static int udp_bind (PAL_HANDLE * handle, char * uri, int options)
- {
- struct sockaddr buffer, * bind_addr = &buffer;
- int 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));
- fd = INLINE_SYSCALL(socket, 3, bind_addr->sa_family,
- SOCK_DGRAM|SOCK_CLOEXEC|options, 0);
- if (IS_ERR(fd))
- return -PAL_ERROR_DENIED;
- if (bind_addr->sa_family == AF_INET6) {
- int ipv6only = 1;
- INLINE_SYSCALL(setsockopt, 5, fd, SOL_IPV6, IPV6_V6ONLY, &ipv6only,
- sizeof(int));
- }
- 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 options)
- {
- struct sockaddr buffer[2];
- struct sockaddr * bind_addr = buffer, * dest_addr = buffer + 1;
- int 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;
- 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 (dest_addr->sa_family == AF_INET6) {
- int ipv6only = 1;
- INLINE_SYSCALL(setsockopt, 5, fd, SOL_IPV6, IPV6_V6ONLY, &ipv6only,
- sizeof(int));
- }
- if (bind_addr) {
- 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)
- {
- char buf[PAL_SOCKADDR_SIZE];
- int len = strlen(uri);
- if (len >= PAL_SOCKADDR_SIZE)
- return -PAL_ERROR_TOOLONG;
- memcpy(buf, uri, len + 1);
- options &= PAL_OPTION_MASK;
- if (strpartcmp_static(type, "udp.srv:"))
- return udp_bind(hdl, buf, options);
- if (strpartcmp_static(type, "udp:"))
- return udp_connect(hdl, buf, options);
- return -PAL_ERROR_NOTSUPPORT;
- }
- static int udp_receive (PAL_HANDLE handle, int offset, int len, void * buf)
- {
- 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;
- int bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
- if (IS_ERR(bytes))
- switch(ERRNO(bytes)) {
- case EWOULDBLOCK:
- return -PAL_ERROR_TRYAGAIN;
- case EINTR:
- return -PAL_ERROR_INTERRUPTED;
- default:
- return unix_to_pal_error(ERRNO(bytes));
- }
- return bytes;
- }
- static int udp_receivebyaddr (PAL_HANDLE handle, int offset, int len,
- void * buf, char * addr, int addrlen)
- {
- 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;
- int bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
- if (IS_ERR(bytes))
- switch(ERRNO(bytes)) {
- case EWOULDBLOCK:
- return -PAL_ERROR_TRYAGAIN;
- case EINTR:
- return -PAL_ERROR_INTERRUPTED;
- case ECONNREFUSED:
- return -PAL_ERROR_STREAMNOTEXIST;
- default:
- return unix_to_pal_error(ERRNO(bytes));
- }
- char * addr_uri = strcpy_static(addr, "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 int udp_send (PAL_HANDLE handle, int offset, int len, const void * buf)
- {
- 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;
- int bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
- if (IS_ERR(bytes))
- switch(ERRNO(bytes)) {
- case EAGAIN:
- HANDLE_HDR(handle)->flags &= ~WRITEABLE(0);
- return -PAL_ERROR_TRYAGAIN;
- case ECONNRESET:
- case EPIPE:
- return -PAL_ERROR_CONNFAILED;
- default:
- return unix_to_pal_error(ERRNO(bytes));
- }
- if (bytes == len)
- HANDLE_HDR(handle)->flags |= WRITEABLE(0);
- else
- HANDLE_HDR(handle)->flags &= ~WRITEABLE(0);
- return bytes;
- }
- static int udp_sendbyaddr (PAL_HANDLE handle, int offset, int len,
- const void * buf, const char * addr, int addrlen)
- {
- if (!IS_HANDLE_TYPE(handle, udpsrv))
- return -PAL_ERROR_NOTCONNECTION;
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- if (!strpartcmp_static(addr, "udp:"))
- return -PAL_ERROR_INVAL;
- addr += static_strlen("udp:");
- addrlen -= static_strlen("udp:");
- char * addrbuf = __alloca(addrlen);
- memcpy(addrbuf, addr, addrlen);
- struct sockaddr conn_addr;
- int 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;
- int bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
- if (IS_ERR(bytes))
- switch(ERRNO(bytes)) {
- case ECONNRESET:
- case EPIPE:
- return -PAL_ERROR_CONNFAILED;
- case EAGAIN:
- HANDLE_HDR(handle)->flags &= ~WRITEABLE(0);
- default:
- return unix_to_pal_error(ERRNO(bytes));
- }
- if (bytes == len)
- HANDLE_HDR(handle)->flags |= WRITEABLE(0);
- else
- HANDLE_HDR(handle)->flags &= ~WRITEABLE(0);
- 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) {
- struct __kernel_linger l;
- l.l_onoff = 1;
- l.l_linger = 0;
- INLINE_SYSCALL(setsockopt, 5, handle->sock.fd, SOL_SOCKET, SO_LINGER,
- &l, sizeof(struct __kernel_linger));
- 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;
- }
- #ifndef FIONREAD
- # define FIONREAD 0x541B
- #endif
- static int socket_attrquerybyhdl (PAL_HANDLE handle, PAL_STREAM_ATTR * attr)
- {
- if (handle->sock.fd == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- attr->handle_type = HANDLE_HDR(handle)->type;
- attr->disconnected = HANDLE_HDR(handle)->flags & ERROR(0);
- attr->nonblocking = handle->sock.nonblocking;
- attr->writeable = HANDLE_HDR(handle)->flags & WRITEABLE(0);
- attr->pending_size = 0; /* fill in later */
- 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;
- int fd = handle->sock.fd, ret, val;
- if (!IS_HANDLE_TYPE(handle, tcpsrv)) {
- /* try use ioctl FIONEAD to get the size of socket */
- ret = INLINE_SYSCALL(ioctl, 3, fd, FIONREAD, &val);
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- attr->pending_size = val;
- }
- struct pollfd pfd = { .fd = fd, .events = POLLIN, .revents = 0 };
- struct timespec tp = { 0, 0 };
- ret = INLINE_SYSCALL(ppoll, 5, &pfd, 1, &tp, NULL, 0);
- attr->readable = (ret == 1 && pfd.revents == POLLIN);
- 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, int count)
- {
- int old_count = count;
- int ret;
- const char * prefix = NULL;
- int prefix_len = 0;
- struct sockaddr * bind_addr = NULL, * dest_addr = NULL;
- switch (PAL_GET_TYPE(handle)) {
- case pal_type_tcpsrv:
- prefix_len = static_strlen("tcp.srv");
- prefix = "tcp.srv";
- bind_addr = (struct sockaddr *) handle->sock.bind;
- break;
- case pal_type_tcp:
- prefix_len = static_strlen("tcp");
- 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("udp.srv");
- prefix = "udp.srv";
- bind_addr = (struct sockaddr *) handle->sock.bind;
- break;
- case pal_type_udp:
- prefix_len = static_strlen("udp");
- prefix = "udp";
- bind_addr = (struct sockaddr *) handle->sock.bind;
- dest_addr = (struct sockaddr *) handle->sock.conn;
- break;
- default:
- return -PAL_ERROR_INVAL;
- }
- if (prefix_len >= count)
- return -PAL_ERROR_OVERFLOW;
- memcpy(buffer, prefix, prefix_len + 1);
- buffer += prefix_len;
- count -= prefix_len;
- for (int i = 0 ; i < 2 ; i++) {
- struct sockaddr * addr = i ? dest_addr : bind_addr;
- if (addr) {
- if (count <= 1)
- return -PAL_ERROR_OVERFLOW;
- buffer[0] = ':';
- buffer[1] = 0;
- buffer++;
- count--;
- if ((ret = inet_create_uri(buffer, count, addr,
- addr_size(addr))) < 0)
- return ret;
- buffer += ret;
- count -= ret;
- }
- }
- return old_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,
- };
- PAL_HANDLE _DkBroadcastStreamOpen (void)
- {
- if (!pal_sec.mcast_port) {
- unsigned short mcast_port;
- _DkFastRandomBitsRead(&mcast_port, sizeof(unsigned short));
- pal_sec.mcast_port = mcast_port > 1024 ? mcast_port : mcast_port + 1024;
- }
- struct sockaddr_in addr;
- int ret = 0;
- addr.sin_family = AF_INET;
- addr.sin_addr.s_addr = INADDR_ANY;
- addr.sin_port = __htons(pal_sec.mcast_port);
- /* set up server (sender) side */
- int srv = INLINE_SYSCALL(socket, 3, AF_INET, SOCK_DGRAM|SOCK_CLOEXEC, 0);
- if (IS_ERR(srv))
- goto err;
- ret = INLINE_SYSCALL(setsockopt, 5, srv, IPPROTO_IP, IP_MULTICAST_IF,
- &addr.sin_addr.s_addr, sizeof(addr.sin_addr.s_addr));
- if (IS_ERR(ret))
- goto err_srv;
- /* set up client (receiver) side */
- int cli = INLINE_SYSCALL(socket, 3, AF_INET, SOCK_DGRAM|SOCK_CLOEXEC, 0);
- if (IS_ERR(cli))
- goto err_srv;
- int reuse = 1;
- INLINE_SYSCALL(setsockopt, 5, cli, SOL_SOCKET, SO_REUSEADDR,
- &reuse, sizeof(reuse));
- ret = INLINE_SYSCALL(bind, 3, cli, &addr, sizeof(addr));
- if (IS_ERR(ret))
- goto err_cli;
- ret = INLINE_SYSCALL(setsockopt, 5, cli, IPPROTO_IP, IP_MULTICAST_IF,
- &addr.sin_addr.s_addr, sizeof(addr.sin_addr.s_addr));
- if (IS_ERR(ret))
- goto err_cli;
- inet_pton4(GRAPHENE_MCAST_GROUP, sizeof(GRAPHENE_MCAST_GROUP) - 1,
- &addr.sin_addr.s_addr);
- struct ip_mreq group;
- group.imr_multiaddr.s_addr = addr.sin_addr.s_addr;
- group.imr_interface.s_addr = INADDR_ANY;
- ret = INLINE_SYSCALL(setsockopt, 5, cli, IPPROTO_IP, IP_ADD_MEMBERSHIP,
- &group, sizeof(group));
- if (IS_ERR(ret))
- goto err_cli;
- PAL_HANDLE hdl = malloc(HANDLE_SIZE(mcast));
- SET_HANDLE_TYPE(hdl, mcast);
- HANDLE_HDR(hdl)->flags |= WFD(1)|WRITEABLE(1);
- hdl->mcast.srv = srv;
- hdl->mcast.cli = cli;
- hdl->mcast.port = (PAL_NUM) pal_sec.mcast_port;
- hdl->mcast.nonblocking = PAL_FALSE;
- hdl->mcast.addr = (PAL_PTR) remalloc(&addr, sizeof(addr));
- return hdl;
- err_cli:
- INLINE_SYSCALL(close, 1, cli);
- err_srv:
- INLINE_SYSCALL(close, 1, srv);
- err:
- return NULL;
- }
- static int mcast_send (PAL_HANDLE handle, int offset, int size,
- const void * buf)
- {
- if (handle->mcast.srv == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- struct msghdr hdr;
- struct iovec iov;
- iov.iov_base = (void *) buf;
- iov.iov_len = size;
- hdr.msg_name = (char *) handle->mcast.addr;
- hdr.msg_namelen = sizeof(struct sockaddr_in);
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
- hdr.msg_control = NULL;
- hdr.msg_controllen = 0;
- hdr.msg_flags = 0;
- int bytes = INLINE_SYSCALL(sendmsg, 3, handle->mcast.srv, &hdr,
- MSG_NOSIGNAL);
- if (IS_ERR(bytes))
- switch(ERRNO(bytes)) {
- case ECONNRESET:
- case EPIPE:
- return -PAL_ERROR_CONNFAILED;
- case EAGAIN:
- HANDLE_HDR(handle)->flags &= ~WRITEABLE(1);
- default:
- return unix_to_pal_error(ERRNO(bytes));
- }
- if (bytes == size)
- HANDLE_HDR(handle)->flags |= WRITEABLE(1);
- else
- HANDLE_HDR(handle)->flags &= ~WRITEABLE(1);
- return bytes;
- }
- static int mcast_receive (PAL_HANDLE handle, int offset, int size, void * buf)
- {
- if (handle->mcast.cli == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- struct msghdr hdr;
- struct iovec iov;
- iov.iov_base = buf;
- iov.iov_len = size;
- 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;
- int bytes = INLINE_SYSCALL(recvmsg, 3, handle->mcast.cli, &hdr, 0);
- if (IS_ERR(bytes))
- return -PAL_ERROR_DENIED;
- return bytes;
- }
- static int mcast_attrquerybyhdl (PAL_HANDLE handle, PAL_STREAM_ATTR * attr)
- {
- int ret, val;
- if (handle->mcast.cli == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- ret = INLINE_SYSCALL(ioctl, 3, handle->mcast.cli, FIONREAD, &val);
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- attr->handle_type = pal_type_mcast;
- attr->disconnected = HANDLE_HDR(handle)->flags & (ERROR(0)|ERROR(1));
- attr->nonblocking = handle->mcast.nonblocking;
- attr->readable = !!val;
- attr->writeable = HANDLE_HDR(handle)->flags & WRITEABLE(1);
- attr->runnable = PAL_FALSE;
- attr->pending_size = val;
- return 0;
- }
- static int mcast_attrsetbyhdl (PAL_HANDLE handle, PAL_STREAM_ATTR * attr)
- {
- if (handle->mcast.cli == PAL_IDX_POISON)
- return -PAL_ERROR_BADHANDLE;
- int ret;
- PAL_BOL * nonblocking = &handle->mcast.nonblocking;
- if (attr->nonblocking != *nonblocking) {
- ret = INLINE_SYSCALL(fcntl, 3, handle->mcast.cli, F_SETFL,
- *nonblocking ? O_NONBLOCK : 0);
- if (IS_ERR(ret))
- return unix_to_pal_error(ERRNO(ret));
- *nonblocking = attr->nonblocking;
- }
- return 0;
- }
- struct handle_ops mcast_ops = {
- .write = &mcast_send,
- .read = &mcast_receive,
- .attrquerybyhdl = &mcast_attrquerybyhdl,
- .attrsetbyhdl = &mcast_attrsetbyhdl,
- };
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