49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* cmd_pasv.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/11/08 13:54:57 by jhalford #+# #+# */
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/* Updated: 2017/11/12 14:56:01 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "ftp_server.h"
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static int pasv_ok(t_ftp *ftp, int sock, struct sockaddr_in sin)
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{
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ftp->data_state = DATA_PASV;
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ftp->dconn.sock = sock;
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console_msg(1, "listening on %i (PASV)", ntohs(sin.sin_port));
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return (FTP_RET(ftp, "227 %i,%i,%i,%i,%i,%i",
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(ntohl(sin.sin_addr.s_addr) >> (8 * 3)) & 0xff,
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(ntohl(sin.sin_addr.s_addr) >> (8 * 2)) & 0xff,
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(ntohl(sin.sin_addr.s_addr) >> (8 * 1)) & 0xff,
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(ntohl(sin.sin_addr.s_addr) >> (8 * 0)) & 0xff,
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(ntohs(sin.sin_port) >> (8 * 1)) & 0xff,
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(ntohs(sin.sin_port) >> (8 * 0)) & 0xff));
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}
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int cmd_pasv(t_ftp *ftp, char **av)
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{
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uint16_t port;
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int sock;
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struct sockaddr_in sin;
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(void)av;
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = inet_addr("127.0.0.1");
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port = 35000;
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while (++port < USHRT_MAX)
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{
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sin.sin_port = htons(port);
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sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (bind(sock, (const struct sockaddr *)&sin,
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sizeof(struct sockaddr_in)) == 0
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&& listen(sock, 3) == 0)
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return (pasv_ok(ftp, sock, sin));
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}
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return (FTP_RET(ftp, "500 couldn't find local port"));
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}
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