46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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typedef struct packet {
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uintptr_t source;
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size_t size;
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uint8_t data[];
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} packet_t;
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#define MAX_PACKET_SIZE 1024
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#define PACKET_SIZE (sizeof(packet_t) + MAX_PACKET_SIZE)
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typedef struct server_write_header {
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uintptr_t target;
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uint8_t data[];
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} header_t;
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int main(int argc, char * argv[]) {
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FILE * server = fopen("/dev/pex/testex", "a+");
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FILE * client = fopen("/dev/pex/testex", "r+");
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/* Output is unbuffered so we can write packets discreetly */
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setbuf(server, NULL);
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setbuf(client, NULL);
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fprintf(stdout, "[server = %p]\n", server);
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fprintf(stdout, "[client = %p]\n", client);
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fprintf(client, "Hello World!");
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packet_t * p = malloc(PACKET_SIZE);
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memset(p, 0x00, PACKET_SIZE);
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fprintf(stdout, "Reading %d...\n", PACKET_SIZE);
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size_t size = read(fileno(server), p, PACKET_SIZE);
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fprintf(stdout, "Received a packet of size %d (%d) from client [0x%x]\n", p->size, size, p->source);
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fprintf(stdout, "Packet contents: %s\n", p->data);
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fclose(client);
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fclose(server);
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return 0;
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}
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