Httpd server.

#include <string.h>
#include "lwip/debug.h"
#include "lwip/stats.h"
#include "lwip/tcp.h"
#include "lwipopts.h"
#include "httpd.h"
#include "fs.h"

Data Structures
struct	http_state

Functions
static err_t	http_accept (void arg, struct tcp_pcb pcb, err_t err)
	Accept incoming HTTP connection requests. More...

static void	http_close_conn (struct tcp_pcb pcb, struct http_state hs)
	Close HTTP connection. More...

static void	http_conn_err (void *arg, err_t err)
	Callback called on connection error. More...

static err_t	http_poll (void arg, struct tcp_pcb pcb)
	Poll for HTTP data. More...

static err_t	http_recv (void arg, struct tcp_pcb pcb, struct pbuf *p, err_t err)
	Core HTTP server receive function. More...

static void	http_send_data (struct tcp_pcb pcb, struct http_state hs)
	Send HTTP data. More...

static err_t	http_sent (void arg, struct tcp_pcb pcb, u16_t len)
	Callback to handle data transfer. More...

void	httpd_init (void)
	HTTP server init. More...

static err_t http_accept	(	void *	arg,
		struct tcp_pcb *	pcb,
		err_t	err
	)

static

Accept incoming HTTP connection requests.

Parameters

arg	Pointer to structure representing the HTTP state.
pcb	Pointer to a TCP connection structure.
err	Connection status.

Returns: ERR_OK on success.

References ERR_MEM, ERR_OK, http_state::file, http_conn_err(), http_poll(), http_recv(), http_state::left, LWIP_UNUSED_ARG, mem_malloc(), NULL, http_state::retries, tcp_arg(), tcp_err(), tcp_poll(), TCP_PRIO_MIN, tcp_recv(), and tcp_setprio().

Referenced by httpd_init().

static void http_close_conn	(	struct tcp_pcb *	pcb,
		struct http_state *	hs
	)

static

Close HTTP connection.

Parameters

pcb	Pointer to a TCP connection structure.
hs	Pointer to structure representing the HTTP state.

References mem_free(), NULL, tcp_arg(), tcp_close(), tcp_recv(), and tcp_sent().

Referenced by http_recv(), and http_sent().

static void http_conn_err	(	void *	arg,
		err_t	err
	)

static

Callback called on connection error.

Parameters

arg	Pointer to structure representing the HTTP state.
err	Error code.

References arg, LWIP_UNUSED_ARG, and mem_free().

Referenced by http_accept().

static err_t http_poll	(	void *	arg,
		struct tcp_pcb *	pcb
	)

static

Poll for HTTP data.

Parameters

arg	Pointer to structure representing the HTTP state.
pcb	Pointer to a TCP connection structure.

Returns: ERR_OK on success, ERR_ABRT otherwise.

References arg, ERR_ABRT, ERR_OK, http_state::file, http_send_data(), NULL, http_state::retries, and tcp_abort().

Referenced by http_accept().

static err_t http_recv	(	void *	arg,
		struct tcp_pcb *	pcb,
		struct pbuf *	p,
		err_t	err
	)

static

Core HTTP server receive function.

Handle the request and process it.

Parameters

arg	Pointer to structure representing the HTTP state.
pcb	Pointer to a TCP connection structure.
p	Incoming request.
err	Connection status.

Returns: ERR_OK.

References arg, fs_file::data, ERR_OK, http_state::file, fs_open(), http_close_conn(), http_send_data(), http_sent(), http_state::left, fs_file::len, NULL, pbuf::payload, pbuf_free(), tcp_recved(), tcp_sent(), and pbuf::tot_len.

Referenced by http_accept().

static void http_send_data	(	struct tcp_pcb *	pcb,
		struct http_state *	hs
	)

static

Send HTTP data.

Parameters

pcb	Pointer to a TCP connection structure.
hs	Pointer to structure representing the HTTP state.

References ERR_MEM, ERR_OK, http_state::file, http_state::left, tcp_sndbuf, tcp_write(), and TCP_WRITE_FLAG_COPY.

Referenced by http_poll(), http_recv(), and http_sent().

static err_t http_sent	(	void *	arg,
		struct tcp_pcb *	pcb,
		u16_t	len
	)

static

Callback to handle data transfer.

Parameters

arg	Pointer to structure representing the HTTP state.
pcb	Pointer to a TCP connection structure.
len	Unused.

Returns: ERR_OK on success, ERR_ABRT otherwise.

References arg, ERR_OK, http_close_conn(), http_send_data(), http_state::left, LWIP_UNUSED_ARG, and http_state::retries.

Referenced by http_recv().

void httpd_init ( void )

HTTP server init.

References http_accept(), IP_ADDR_ANY, tcp_accept(), tcp_bind(), tcp_listen, and tcp_new().

Referenced by main().

Microchip® Advanced Software Framework

Data Structures

Functions