nuttx/Documentation/applications/netutils
Swatantra Yadav a4b6b8b8bf Documentation/netutils: add comprehensive guide for ftpd
Provide a complete documentation guide for the ftpd (FTP server) network
utility in Documentation/applications/netutils/ftpd/index.rst, replacing
the previous 6-line placeholder stub.

Includes:
- Protocol architecture overview (control/data connection separation, multi-session worker pthreads, VFS mapping)
- Security considerations regarding unencrypted plaintext FTP credentials, mandatory credential hardening, home directory isolation, and encrypted password authentication
- Comprehensive supported RFC 959 / RFC 2428 / RFC 3659 FTP commands reference table
- Configuration options table and networking prerequisites (CONFIG_NETUTILS_FTPD, worker stack size, buffer sizes)
- NSH terminal usage (ftpd -4 / -6, ftpd_stop) with address-family flag requirements and configured account placeholders
- External client connection walkthroughs (FTP CLI, cURL) using configured account and anonymous workflows
- Public C API reference for types, account flags, and lifecycle functions (ftpd_open, ftpd_adduser, ftpd_session, ftpd_close)
- Complete, runnable C application example demonstrating multi-user server setup, signal-driven termination (SIGINT/SIGTERM) with atomic sig_atomic_t state, POSIX kill stop routine, and credential placeholders
- Embedded design and resource tuning guidelines (stack sizing, flash/SD card I/O buffering, and NAT passive mode)

Addresses #11081

Assisted-by: Google Gemini
Signed-off-by: Swatantra Yadav <maverickswatantra@gmail.com>
2026-10-09 12:08:21 +08:00
..
bare doc/apps: Add BARE 2026-01-22 03:48:35 +08:00
chat
cjson
codecs
cwebsocket
dhcp6c
dhcpc Documentation/netutils: add comprehensive guide for dhcpc 2026-10-09 12:06:15 +08:00
dhcpd
discover
dropbear Documentation/applications: document Dropbear scp file transfers 2026-07-10 15:37:54 -03:00
esp8266
ftpc
ftpd Documentation/netutils: add comprehensive guide for ftpd 2026-10-09 12:08:21 +08:00
iper
iptables
libcurl4nx
mqttc documentation: Document MQTT-C with Mbed TLS usage. 2026-04-14 16:05:54 +08:00
netcat
netinit
netlib netlib: Supplement the netlib_check_httpconnectivity documentation 2026-01-09 17:11:04 +08:00
nng
ntpclient !compiler: drop CONFIG_HAVE_LONG_LONG and require long long support 2026-05-19 16:21:28 +08:00
paho_mqtt paho_mqtt: Add paho_mqtt repository description file 2025-12-25 13:14:50 +08:00
ping
pppd
ptpd
rexec
rexecd Documentation: brand new layout for NuttX documentation. 2026-10-08 01:40:54 +08:00
rtptools
s2opc Documentation: add S2OPC documentation 2026-09-14 18:30:38 -03:00
smtp
telnetc
telnetd
tftpc Documentation/netutils: add comprehensive guide for tftpc 2026-10-08 15:55:47 -03:00
thttpd
vconfig net/vlan: add a documentation for vconfig 2026-01-07 22:25:47 +08:00
wakaama
wakeonlan
webclient
webserver
xmlrpc
index.rst