72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2014-2018 K. Lange
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*
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* pex - Packet EXchange client library
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*
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* Provides a friendly interface to the "Packet Exchange"
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* functionality provided by the packetfs kernel module.
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*/
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#include <alloca.h>
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#include <assert.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <toaru/pex.h>
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size_t pex_send(FILE * sock, unsigned int rcpt, size_t size, char * blob) {
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assert(size <= MAX_PACKET_SIZE);
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pex_header_t * broadcast = malloc(sizeof(pex_header_t) + size);
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broadcast->target = rcpt;
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memcpy(broadcast->data, blob, size);
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size_t out = write(fileno(sock), broadcast, sizeof(pex_header_t) + size);
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free(broadcast);
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return out;
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}
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size_t pex_broadcast(FILE * sock, size_t size, char * blob) {
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return pex_send(sock, 0, size, blob);
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}
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size_t pex_listen(FILE * sock, pex_packet_t * packet) {
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return read(fileno(sock), packet, PACKET_SIZE);
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}
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size_t pex_reply(FILE * sock, size_t size, char * blob) {
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return write(fileno(sock), blob, size);
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}
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size_t pex_recv(FILE * sock, char * blob) {
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memset(blob, 0, MAX_PACKET_SIZE);
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return read(fileno(sock), blob, MAX_PACKET_SIZE);
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}
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FILE * pex_connect(char * target) {
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char tmp[100];
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sprintf(tmp, "/dev/pex/%s", target);
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FILE * out = fopen(tmp, "r+");
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if (out) {
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setbuf(out, NULL);
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}
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return out;
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}
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FILE * pex_bind(char * target) {
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char tmp[100];
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sprintf(tmp, "/dev/pex/%s", target);
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FILE * out = fopen(tmp, "a+");
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if (out) {
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setbuf(out, NULL);
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}
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return out;
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}
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size_t pex_query(FILE * sock) {
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return ioctl(fileno(sock), IOCTL_PACKETFS_QUEUED, NULL);
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}
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