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privsock.c
165 lines (143 loc) · 3.12 KB
/
privsock.c
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#include "privsock.h"
#include "common.h"
#include "sysutil.h"
void priv_sock_init(session_t *sess)
{
int sockfd[2];
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockfd) < 0)
err_sys("socketpair");
sess->parent_fd = sockfd[0];
sess->child_fd = sockfd[1];
}
void priv_sock_close(session_t *sess)
{
if (sess->child_fd != -1)
{
close(sess->child_fd);
sess->child_fd = -1;
}
if (sess->parent_fd != -1)
{
close(sess->parent_fd);
sess->parent_fd = -1;
}
}
void priv_sock_set_parent_context(session_t *sess)
{
if (sess->child_fd != -1)
{
close(sess->child_fd);
sess->child_fd = -1;
}
}
void priv_sock_set_child_context(session_t *sess)
{
if (sess->parent_fd != -1)
{
close(sess->parent_fd);
sess->parent_fd = -1;
}
}
void priv_sock_send_cmd(int fd, char cmd)
{
int ret;
ret = writen(fd, &cmd, sizeof(cmd));
if (ret != sizeof(cmd))
{
fprintf(stderr, "priv_sock_send_cmd error\n");
exit(EXIT_FAILURE);
}
}
char priv_sock_get_cmd(int fd)
{
char res;
int ret;
ret = readn(fd, &res, sizeof(res));
if (ret == 0)
{
printf("ftp process exit\n");
exit(EXIT_SUCCESS);
}
if (ret != sizeof(res))
{
fprintf(stderr, "priv_sock_get_cmd error\n");
exit(EXIT_FAILURE);
}
return res;
}
void priv_sock_send_result(int fd, char res)
{
int ret;
ret = writen(fd, &res, sizeof(res));
if (ret != sizeof(res))
{
fprintf(stderr, "priv_sock_send_result error\n");
exit(EXIT_FAILURE);
}
}
char priv_sock_get_result(int fd)
{
char res;
int ret;
ret = readn(fd, &res, sizeof(res));
if (ret != sizeof(res))
{
fprintf(stderr, "priv_sock_get_result error\n");
exit(EXIT_FAILURE);
}
return res;
}
void priv_sock_send_int(int fd, int the_int)
{
int ret;
ret = writen(fd, &the_int, sizeof(the_int));
if (ret != sizeof(the_int))
{
fprintf(stderr, "priv_sock_send_in error\n");
exit(EXIT_FAILURE);
}
}
int priv_sock_get_int(int fd)
{
int res, ret;
ret = readn(fd, &res, sizeof(res));
if (ret != sizeof(res))
{
fprintf(stderr, "priv_sock_get_int error\n");
exit(EXIT_FAILURE);
}
return res;
}
void priv_sock_send_buf(int fd, const char *buf, unsigned int len)
{
priv_sock_send_int(fd, (int)len);
int ret = writen(fd, buf, len);
if (ret != (int)len)
{
fprintf(stderr, "priv_sock_send_buf error\n");
exit(EXIT_FAILURE);
}
}
void priv_sock_recv_buf(int fd, char *buf, unsigned int len)
{
unsigned int recv_len = (unsigned int)priv_sock_get_int(fd);
if (recv_len > len)
{
fprintf(stderr, "priv_sock_recv_buf error\n");
exit(EXIT_FAILURE);
}
int ret = readn(fd, buf, recv_len);
if (ret != (int)recv_len)
{
fprintf(stderr, "priv_sock_recv_buf error\n");
exit(EXIT_FAILURE);
}
}
void priv_sock_send_fd(int sock_fd, int fd)
{
send_fd(sock_fd, fd);
}
int priv_sock_recv_fd(int sock_fd)
{
return recv_fd(sock_fd, NULL);
}