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/* SPDX-License-Identifier: BSD-3-Clause */
/*
* Copyright © 2020 rsiddharth <s@ricketyspace.net>
*/
#include <nserve.h>
int slurpsock(char *buf, size_t buf_sz, int sock)
{
ssize_t bytes;
bytes = recv(sock, buf, buf_sz, 0);
check(bytes >= 0, "Failed to read from socket: %d", sock);
return bytes;
error:
return -1;
}
int barfsock(char *buf, size_t buf_sz, int sock)
{
ssize_t bytes = 0;
bytes = send(sock, buf, buf_sz, 0);
check(bytes >= 0, "barfsock: send failed");
return bytes;
error:
return -1;
}
void nserve(int sock)
{
char *out = (char *) calloc(RSP_SIZE + 1, sizeof(char));
check_mem(out);
char *cmd = (char *) calloc(CMD_MAX_SIZE + 1, sizeof(char));
check_mem(cmd);
int rc = 0, done = 0;
do {
// clear out, cmd.
memset(out, '\0', RSP_SIZE + 1);
memset(cmd, '\0', CMD_MAX_SIZE + 1);
// Read command from socket.
ssize_t bytes = slurpsock(cmd, CMD_MAX_SIZE, sock);
check(bytes >= 0, "nserve: slurpsock failed");
rc = process(cmd, out);
if (rc < 0) {
done = 1;
}
// Write response to socket.
rc = barfsock(out, strlen(out), sock);
check(rc != -1, "nserve: echo failed");
} while(done != 1);
// Close socket.
rc = close(sock);
check(rc == 0, "nserve: close failed");
// Cleanup.
free(cmd);
exit(0);
error:
rc = close(sock);
check(rc == 0, "nserve: close failed");
// Cleanup if needed.
if (cmd)
free(cmd);
exit(1);
}
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