masterthesis-ecdaa-network-wrapper/issuer.c

#include <stdio.h>
#include <string.h>
#include <ecdaa.h>
#include "server.h"
#include "client.h"

typedef struct issuer {
    struct ecdaa_issuer_public_key_FP256BN ipk;
    struct ecdaa_issuer_secret_key_FP256BN isk;
} issuer_t;

int process_issuer(int connfd);

int main() {
    int err = 0;
    server_t *server;

    server = server_open(&process_issuer);
    if (NULL == server) {
        printf("listen failed, closing...\n");
    }

    for (; !err;) {
        err = server_accept(server);
        if (1 == err) {
            printf("graceful shutdown...\n");
        } else if (err) {
            printf("accept failed, closing...\n");
        }
    }
    printf("shut down server\n");
    server_close(server);
    return 0;
}

int process_issuer(int connfd) {
    char inbuf[MAX_BUFSIZE];
    char outbuf[MAX_BUFSIZE];
    int n = 0;
    for (;;) {
        bzero(inbuf, MAX_BUFSIZE);
        bzero(outbuf, MAX_BUFSIZE);

        if (0 >= read(connfd, inbuf, sizeof(inbuf))) {
            printf("process_issuer: cannot read from socket\n");
            return -1;
        }
        printf("> ISSUER: %s\n", inbuf);
        strncpy(outbuf, "OK", 2);
        printf("< ISSUER: %s\n", outbuf);
        write(connfd, outbuf, sizeof(outbuf));
        if (0 == strncmp("exit", inbuf, 4)) {
            printf("process_issuer: exiting gracefully\n");
            return 0;
        }
        if (0 == strncmp("shutdown", inbuf, 8)) {
            printf("process_issuer: shutting down gracefully\n");
            return 1;
        }
    }
}