105 lines
3 KiB
C
105 lines
3 KiB
C
/* $Id: receivedata.c,v 1.10 2021/03/02 23:33:07 nanard Exp $ */
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/* Project : miniupnp
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* Website : http://miniupnp.free.fr/
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* Author : Thomas Bernard
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* Copyright (c) 2011-2021 Thomas Bernard
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* This software is subject to the conditions detailed in the
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* LICENCE file provided in this distribution. */
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#include <stdio.h>
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#include <string.h>
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#ifdef _WIN32
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#else /* _WIN32 */
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#include <unistd.h>
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#if defined(__amigaos__) && !defined(__amigaos4__)
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#define socklen_t int
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#else /* #if defined(__amigaos__) && !defined(__amigaos4__) */
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#include <sys/select.h>
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#endif /* #else defined(__amigaos__) && !defined(__amigaos4__) */
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#include <sys/socket.h>
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#include <netinet/in.h>
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#if !defined(__amigaos__) && !defined(__amigaos4__)
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#include <poll.h>
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#endif /* !defined(__amigaos__) && !defined(__amigaos4__) */
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#include <errno.h>
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#define MINIUPNPC_IGNORE_EINTR
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#endif /* _WIN32 */
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#include "receivedata.h"
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int
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receivedata(SOCKET socket,
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char * data, int length,
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int timeout, unsigned int * scope_id)
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{
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#ifdef MINIUPNPC_GET_SRC_ADDR
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struct sockaddr_storage src_addr;
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socklen_t src_addr_len = sizeof(src_addr);
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#endif /* MINIUPNPC_GET_SRC_ADDR */
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int n;
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#if !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__)
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/* using poll */
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struct pollfd fds[1]; /* for the poll */
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#ifdef MINIUPNPC_IGNORE_EINTR
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do {
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#endif /* MINIUPNPC_IGNORE_EINTR */
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fds[0].fd = socket;
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fds[0].events = POLLIN;
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n = poll(fds, 1, timeout);
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#ifdef MINIUPNPC_IGNORE_EINTR
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} while(n < 0 && errno == EINTR);
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#endif /* MINIUPNPC_IGNORE_EINTR */
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if(n < 0) {
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PRINT_SOCKET_ERROR("poll");
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return -1;
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} else if(n == 0) {
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/* timeout */
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return 0;
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}
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#else /* !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__) */
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/* using select under _WIN32 and amigaos */
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fd_set socketSet;
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TIMEVAL timeval;
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FD_ZERO(&socketSet);
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FD_SET(socket, &socketSet);
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timeval.tv_sec = timeout / 1000;
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timeval.tv_usec = (timeout % 1000) * 1000;
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n = select(FD_SETSIZE, &socketSet, NULL, NULL, &timeval);
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if(n < 0) {
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PRINT_SOCKET_ERROR("select");
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return -1;
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} else if(n == 0) {
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return 0;
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}
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#endif /* !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__) */
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#ifdef MINIUPNPC_GET_SRC_ADDR
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memset(&src_addr, 0, sizeof(src_addr));
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n = recvfrom(socket, data, length, 0,
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(struct sockaddr *)&src_addr, &src_addr_len);
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#else /* MINIUPNPC_GET_SRC_ADDR */
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n = recv(socket, data, length, 0);
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#endif /* MINIUPNPC_GET_SRC_ADDR */
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if(n<0) {
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PRINT_SOCKET_ERROR("recv");
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}
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#ifdef MINIUPNPC_GET_SRC_ADDR
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if (src_addr.ss_family == AF_INET6) {
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const struct sockaddr_in6 * src_addr6 = (struct sockaddr_in6 *)&src_addr;
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#ifdef DEBUG
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printf("scope_id=%u\n", src_addr6->sin6_scope_id);
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#endif /* DEBUG */
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if(scope_id)
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*scope_id = src_addr6->sin6_scope_id;
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} else {
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if(scope_id)
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*scope_id = 0;
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}
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#else /* MINIUPNPC_GET_SRC_ADDR */
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if(scope_id)
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*scope_id = 0;
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#endif /* MINIUPNPC_GET_SRC_ADDR */
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return n;
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}
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