[PATCH v5 10/11] net/httpd: add httpd common code
Mikhail Kshevetskiy
mikhail.kshevetskiy at iopsys.eu
Sat Aug 24 11:27:15 CEST 2024
This patch adds HTTP/1.1 compatible web-server that can be used
by other. Server supports GET, POST, and HEAD requests. On client
request it will call user specified GET/POST callback. Then results
will be transmitted to client.
The following restrictions exist on the POST request
at the moment:
* only multipart/form-data with a single file object
* object will be stored to a memory area specified in
image_load_addr variable
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>
---
include/net.h | 2 +-
include/net/httpd.h | 64 ++++
net/Kconfig | 14 +
net/Makefile | 1 +
net/httpd.c | 692 ++++++++++++++++++++++++++++++++++++++++++++
net/net.c | 6 +
6 files changed, 778 insertions(+), 1 deletion(-)
create mode 100644 include/net/httpd.h
create mode 100644 net/httpd.c
diff --git a/include/net.h b/include/net.h
index 0af6493788a..154885a2b7e 100644
--- a/include/net.h
+++ b/include/net.h
@@ -515,7 +515,7 @@ extern int net_restart_wrap; /* Tried all network devices */
enum proto_t {
BOOTP, RARP, ARP, TFTPGET, DHCP, DHCP6, PING, PING6, DNS, NFS, CDP,
NETCONS, SNTP, TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT_UDP, FASTBOOT_TCP,
- WOL, UDP, NCSI, WGET, NETCAT_LOAD, NETCAT_SAVE, RS
+ WOL, UDP, NCSI, WGET, NETCAT_LOAD, NETCAT_SAVE, HTTPD, RS
};
extern char net_boot_file_name[1024];/* Boot File name */
diff --git a/include/net/httpd.h b/include/net/httpd.h
new file mode 100644
index 00000000000..ff0dc93ecf5
--- /dev/null
+++ b/include/net/httpd.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * httpd support header file
+ * Copyright (C) 2024 IOPSYS Software Solutions AB
+ * Author: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>
+ *
+ */
+#ifndef __NET_HTTPD_COMMON_H__
+#define __NET_HTTPD_COMMON_H__
+
+struct http_reply {
+ int code;
+ const char *code_msg;
+ const char *data_type;
+ void *data;
+ u32 len;
+};
+
+struct httpd_post_data {
+ const char *name;
+ const char *filename;
+ void *addr;
+ u32 size;
+};
+
+enum httpd_req_check {
+ HTTPD_REQ_OK,
+ HTTPD_BAD_URL,
+ HTTPD_BAD_REQ,
+ HTTPD_CLNT_RST
+};
+
+struct httpd_config {
+ enum net_loop_state (*on_stop)(void);
+ void (*on_req_end)(void *req_id);
+
+ enum httpd_req_check (*pre_get)(void *req_id, const char *url);
+ enum httpd_req_check (*pre_post)(void *req_id, const char *url,
+ struct httpd_post_data *post);
+
+ struct http_reply * (*get)(void *req_id, const char *url);
+ struct http_reply * (*post)(void *req_id, const char *url,
+ struct httpd_post_data *post);
+
+ struct http_reply *error_400;
+ struct http_reply *error_404;
+};
+
+/**
+ * httpd_setup() - configure the webserver
+ */
+void httpd_setup(struct httpd_config *config);
+
+/**
+ * httpd_stop() - start stopping of the webserver
+ */
+void httpd_stop(void);
+
+/**
+ * httpd_start() - start the webserver
+ */
+void httpd_start(void);
+
+#endif /* __NET_HTTPD_COMMON_H__ */
diff --git a/net/Kconfig b/net/Kconfig
index 7cb80b880a9..55739b9bc98 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -243,6 +243,20 @@ config PROT_TCP_SACK
This option should be turn on if you want to achieve the fastest
file transfer possible.
+config HTTPD_COMMON
+ bool "HTTP server common code"
+ depends on PROT_TCP
+ help
+ HTTP/1.1 compatible web-server common code. It supports standard
+ GET/POST requests. User MUST provide a configuration to the
+ web-server. On client request web-server will call user specified
+ GET/POST callback. Then results will be transmitted to the client.
+ The following restricions on the POST request are present at the
+ moment:
+ * only mulipart/form-data with a single binary object
+ * object will be stored to a memory area specified in
+ image_load_addr variable
+
config IPV6
bool "IPv6 support"
help
diff --git a/net/Makefile b/net/Makefile
index dac7b4859fb..c1f491fad02 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_PROT_UDP) += udp.o
obj-$(CONFIG_PROT_TCP) += tcp.o
obj-$(CONFIG_CMD_WGET) += wget.o
obj-$(CONFIG_CMD_NETCAT) += netcat.o
+obj-$(CONFIG_HTTPD_COMMON) += httpd.o
# Disable this warning as it is triggered by:
# sprintf(buf, index ? "foo%d" : "foo", index)
diff --git a/net/httpd.c b/net/httpd.c
new file mode 100644
index 00000000000..052fae9ced0
--- /dev/null
+++ b/net/httpd.c
@@ -0,0 +1,692 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * httpd support driver
+ * Copyright (C) 2024 IOPSYS Software Solutions AB
+ * Author: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>
+ */
+
+#include <command.h>
+#include <version.h>
+#include <display_options.h>
+#include <env.h>
+#include <image.h>
+#include <mapmem.h>
+#include <malloc.h>
+#include <net.h>
+#include <net/tcp.h>
+#include <net/httpd.h>
+
+#define HTTP_PORT 80
+
+#define MAX_URL_LEN 128
+#define MAX_BOUNDARY_LEN 80
+#define MAX_MPART_NAME_LEN 80
+#define MAX_FILENAME_LEN 256
+#define BUFFER_LEN 2048
+
+enum http_req_state {
+ ST_REQ_LINE = 0,
+ ST_REQ_HDR,
+ ST_REQ_MPBOUNDARY,
+ ST_REQ_MPART,
+ ST_REQ_MPFILE,
+ ST_REQ_MPEND,
+ ST_REQ_DONE,
+};
+
+enum http_reply_state {
+ ST_REPLY_ERR = 0,
+ ST_REPLY_HDR,
+ ST_REPLY_BODY
+};
+
+enum http_method {
+ HTTP_UNKNOWN = -1,
+ HTTP_GET,
+ HTTP_POST,
+ HTTP_HEAD,
+ HTTP_OPTIONS,
+};
+
+struct httpd_priv {
+ enum http_req_state req_state;
+ enum http_reply_state reply_state;
+
+ struct tcp_stream *tcp;
+
+ enum http_method method;
+ char url[MAX_URL_LEN];
+ u32 version_major;
+ u32 version_minor;
+ u32 hdr_len;
+
+ u32 post_fstart;
+ u32 post_flen;
+ char post_fname[MAX_FILENAME_LEN];
+ char post_name[MAX_MPART_NAME_LEN];
+ char post_boundary[MAX_BOUNDARY_LEN];
+
+ int reply_code;
+ u32 reply_fstart;
+ u32 reply_flen;
+ void *reply_fdata;
+
+ u32 rx_processed;
+ char buf[BUFFER_LEN];
+};
+
+static struct http_reply options_reply = {
+ .code = 200,
+ .code_msg = "OK",
+ .data_type = "text/plain",
+ .data = NULL,
+ .len = 0
+};
+
+static int stop_server;
+static int tsize_num_hash;
+
+static struct httpd_config *cfg;
+
+static void show_block_marker(u32 offs, u32 size)
+{
+ int cnt;
+
+ if (offs > size)
+ offs = size;
+
+ cnt = offs * 50 / size;
+ while (tsize_num_hash < cnt) {
+ putc('#');
+ tsize_num_hash++;
+ }
+
+ if (cnt == 50)
+ putc('\n');
+}
+
+static void tcp_stream_on_closed(struct tcp_stream *tcp)
+{
+ struct httpd_priv *priv = tcp->priv;
+
+ if ((priv->req_state != ST_REQ_DONE) &&
+ (priv->req_state >= ST_REQ_MPFILE)) {
+ printf("\nHTTPD: transfer was terminated\n");
+ }
+
+ if (cfg->on_req_end)
+ cfg->on_req_end(tcp->priv);
+
+ free(tcp->priv);
+
+ if (stop_server)
+ net_set_state(cfg->on_stop ? cfg->on_stop() : NETLOOP_SUCCESS);
+}
+
+static void http_make_reply(struct httpd_priv *priv, struct http_reply *reply,
+ int head_only)
+{
+ int offs = 0;
+
+ if (priv->version_major >= 1) {
+ offs = snprintf(priv->buf, sizeof(priv->buf),
+ "HTTP/%d.%d %d %s\r\n"
+ "Server: %s\r\n"
+ "Connection: close\r\n"
+ "Cache-Control: no-store\r\n"
+ "Content-Type: %s\r\n"
+ "Content-Length: %d\r\n",
+ priv->version_major, priv->version_minor,
+ reply->code, reply->code_msg, U_BOOT_VERSION,
+ reply->data_type,
+ head_only ? 0 : reply->len);
+ if (priv->method == HTTP_OPTIONS)
+ offs += snprintf(priv->buf + offs, sizeof(priv->buf) - offs,
+ "Access-Control-Allow-Methods: GET, HEAD, OPTIONS, POST\r\n");
+ offs += snprintf(priv->buf + offs, sizeof(priv->buf) - offs,
+ "\r\n");
+ }
+
+ priv->reply_code = reply->code;
+ priv->reply_fstart = offs;
+ if (!head_only) {
+ priv->reply_flen = reply->len;
+ priv->reply_fdata = reply->data;
+ }
+}
+
+static enum httpd_req_check http_parse_line(struct httpd_priv *priv, char *line)
+{
+ char *url, *version, *data, *end;
+ u32 len, tmp;
+ enum httpd_req_check ret;
+ struct httpd_post_data post;
+
+ switch (priv->req_state) {
+ case ST_REQ_LINE:
+ if (!strncasecmp(line, "GET ", 4)) {
+ priv->method = HTTP_GET;
+ url = line + 4;
+ } else if (!strncasecmp(line, "POST ", 5)) {
+ priv->method = HTTP_POST;
+ url = line + 5;
+ } else if (!strncasecmp(line, "HEAD ", 5)) {
+ priv->method = HTTP_HEAD;
+ url = line + 5;
+ } else if (!strncasecmp(line, "OPTIONS ", 8)) {
+ priv->method = HTTP_OPTIONS;
+ url = line + 8;
+ } else {
+ /* unknown request */
+ return HTTPD_CLNT_RST;
+ }
+
+ version = strstr(url, " ");
+ if (!version) {
+ /* check for HTTP 0.9 */
+ if (*url != '/' || priv->method != HTTP_GET)
+ return HTTPD_CLNT_RST;
+
+ if (strlen(url) >= MAX_URL_LEN)
+ return HTTPD_CLNT_RST;
+
+ if (cfg->pre_get) {
+ ret = cfg->pre_get(priv, url);
+ if (ret != HTTPD_REQ_OK)
+ return ret;
+ }
+
+ priv->req_state = ST_REQ_DONE;
+ priv->hdr_len = strlen(line) + 2;
+ priv->version_major = 0;
+ priv->version_minor = 9;
+ strcpy(priv->url, url);
+ return HTTPD_REQ_OK;
+ }
+
+ if (strncasecmp(version + 1, "HTTP/", 5)) {
+ /* version is required for HTTP >= 1.0 */
+ return HTTPD_CLNT_RST;
+ }
+
+ *version++ = '\0';
+ version += strlen("HTTP/");
+
+ priv->version_major = dectoul(version, &end);
+ switch (*end) {
+ case '\0':
+ priv->version_minor = 0;
+ break;
+ case '.':
+ priv->version_minor = dectoul(end + 1, &end);
+ if (*end == '\0')
+ break;
+ fallthrough;
+ default:
+ /* bad version format */
+ return HTTPD_CLNT_RST;
+ }
+
+ if (priv->version_major < 1) {
+ /* bad version */
+ return HTTPD_CLNT_RST;
+ }
+
+ if (priv->version_major > 1 || priv->version_minor > 1) {
+ /* We support HTTP/1.1 or early standards only */
+ priv->version_major = 1;
+ priv->version_minor = 1;
+ }
+
+ if (*url != '/')
+ return HTTPD_CLNT_RST;
+
+ if (strlen(url) >= MAX_URL_LEN)
+ return HTTPD_CLNT_RST;
+
+ priv->req_state = ST_REQ_HDR;
+ strcpy(priv->url, url);
+ return HTTPD_REQ_OK;
+
+ case ST_REQ_HDR:
+ if (*line == '\0') {
+ priv->hdr_len = priv->rx_processed + 2;
+ switch (priv->method) {
+ case HTTP_GET:
+ case HTTP_HEAD:
+ if (cfg->pre_get) {
+ ret = cfg->pre_get(priv, priv->url);
+ if (ret != HTTPD_REQ_OK)
+ return ret;
+ }
+ fallthrough;
+
+ case HTTP_OPTIONS:
+ priv->req_state = ST_REQ_DONE;
+ return HTTPD_REQ_OK;
+
+ default:
+ break;
+ }
+
+ if (*priv->post_boundary != '\0') {
+ priv->req_state = ST_REQ_MPBOUNDARY;
+ return HTTPD_REQ_OK;
+ }
+ /* NOT multipart/form-data POST request */
+ return HTTPD_BAD_REQ;
+ }
+
+ if (priv->method != HTTP_POST)
+ return HTTPD_REQ_OK;
+
+ len = strlen("Content-Length: ");
+ if (!strncasecmp(line, "Content-Length: ", len)) {
+ data = line + len;
+ priv->post_flen = simple_strtol(data, &end, 10);
+ if (*end != '\0') {
+ /* bad Content-Length string */
+ return HTTPD_BAD_REQ;
+ }
+ return HTTPD_REQ_OK;
+ }
+
+ len = strlen("Content-Type: ");
+ if (!strncasecmp(line, "Content-Type: ", len)) {
+ data = strstr(line + len, " boundary=");
+ if (!data) {
+ /* expect multipart/form-data format */
+ return HTTPD_BAD_REQ;
+ }
+
+ data += strlen(" boundary=");
+ if (strlen(data) >= sizeof(priv->post_boundary)) {
+ /* no space to keep boundary */
+ return HTTPD_BAD_REQ;
+ }
+
+ strcpy(priv->post_boundary, data);
+ return HTTPD_REQ_OK;
+ }
+
+ return HTTPD_REQ_OK;
+
+ case ST_REQ_MPBOUNDARY:
+ if (*line == '\0')
+ return HTTPD_REQ_OK;
+ if (line[0] != '-' || line[1] != '-' ||
+ strcmp(line + 2, priv->post_boundary)) {
+ /* expect boundary line */
+ return HTTPD_BAD_REQ;
+ }
+ priv->req_state = ST_REQ_MPART;
+ return HTTPD_REQ_OK;
+
+ case ST_REQ_MPART:
+ if (*line == '\0') {
+ if (*priv->post_name == '\0')
+ return HTTPD_BAD_REQ;
+
+ priv->post_fstart = priv->rx_processed + 2;
+ priv->post_flen -= priv->post_fstart - priv->hdr_len;
+ /* expect: "\r\n--${boundary}--\r\n", so strlen() + 8 */
+ priv->post_flen -= strlen(priv->post_boundary) + 8;
+
+ if (cfg->pre_post) {
+ post.addr = NULL;
+ post.name = priv->post_name;
+ post.filename = priv->post_fname;
+ post.size = priv->post_flen;
+
+ ret = cfg->pre_post(priv, priv->url, &post);
+ if (ret != HTTPD_REQ_OK)
+ return ret;
+ }
+
+ tsize_num_hash = 0;
+ printf("File: %s, %u bytes\n", priv->post_fname, priv->post_flen);
+ printf("Loading: ");
+
+ priv->req_state = ST_REQ_MPFILE;
+ return HTTPD_REQ_OK;
+ }
+
+ len = strlen("Content-Disposition: ");
+ if (!strncasecmp(line, "Content-Disposition: ", len)) {
+ data = strstr(line + len, " name=\"");
+ if (!data) {
+ /* name attribute not found */
+ return HTTPD_BAD_REQ;
+ }
+
+ data += strlen(" name=\"");
+ end = strstr(data, "\"");
+ if (!end) {
+ /* bad name attribute format */
+ return HTTPD_BAD_REQ;
+ }
+
+ tmp = end - data;
+ if (tmp >= sizeof(priv->post_name)) {
+ /* multipart name is too long */
+ return HTTPD_BAD_REQ;
+ }
+ strncpy(priv->post_name, data, tmp);
+ priv->post_name[tmp] = '\0';
+
+ data = strstr(line + len, " filename=\"");
+ if (!data) {
+ /* filename attribute not found */
+ return HTTPD_BAD_REQ;
+ }
+
+ data += strlen(" filename=\"");
+ end = strstr(data, "\"");
+ if (!end) {
+ /* bad filename attribute format */
+ return HTTPD_BAD_REQ;
+ }
+
+ tmp = end - data;
+ if (tmp >= sizeof(priv->post_fname))
+ tmp = sizeof(priv->post_fname) - 1;
+ strncpy(priv->post_fname, data, tmp);
+ priv->post_fname[tmp] = '\0';
+ return HTTPD_REQ_OK;
+ }
+
+ return HTTPD_REQ_OK;
+
+ case ST_REQ_MPEND:
+ if (*line == '\0')
+ return HTTPD_REQ_OK;
+
+ len = strlen(priv->post_boundary);
+ if (line[0] != '-' || line[1] != '-' ||
+ strncmp(line + 2, priv->post_boundary, len) ||
+ line[len + 2] != '-' || line[len + 3] != '-' ||
+ line[len + 4] != '\0') {
+ /* expect final boundary line */
+ return HTTPD_BAD_REQ;
+ }
+ priv->req_state = ST_REQ_DONE;
+ return HTTPD_REQ_OK;
+
+ default:
+ return HTTPD_BAD_REQ;
+ }
+}
+
+static enum httpd_req_check http_parse_buf(struct httpd_priv *priv,
+ char *buf, u32 size)
+{
+ char *eol_pos;
+ u32 len;
+ enum httpd_req_check ret;
+
+ buf[size] = '\0';
+ while (size > 0) {
+ eol_pos = strstr(buf, "\r\n");
+ if (!eol_pos)
+ break;
+
+ *eol_pos = '\0';
+ len = eol_pos + 2 - buf;
+
+ ret = http_parse_line(priv, buf);
+ if (ret != HTTPD_REQ_OK) {
+ /* request processing error */
+ return ret;
+ }
+
+ priv->rx_processed += len;
+ buf += len;
+ size -= len;
+
+ if ((priv->req_state == ST_REQ_MPFILE) ||
+ (priv->req_state == ST_REQ_DONE))
+ return HTTPD_REQ_OK;
+ }
+ /* continue when more data becomes available */
+ return HTTPD_REQ_OK;
+}
+
+static void tcp_stream_on_rcv_nxt_update(struct tcp_stream *tcp, u32 rx_bytes)
+{
+ struct httpd_priv *priv;
+ void *ptr;
+ u32 shift, size;
+ enum httpd_req_check ret;
+ struct http_reply *reply;
+ struct httpd_post_data post;
+
+ priv = tcp->priv;
+
+ switch (priv->req_state) {
+ case ST_REQ_DONE:
+ return;
+
+ case ST_REQ_MPFILE:
+ show_block_marker(rx_bytes - priv->post_fstart,
+ priv->post_flen);
+ if (rx_bytes < priv->post_fstart + priv->post_flen) {
+ priv->rx_processed = rx_bytes;
+ return;
+ }
+ priv->req_state = ST_REQ_MPEND;
+ priv->rx_processed = priv->post_fstart + priv->post_flen;
+ fallthrough;
+
+ case ST_REQ_MPEND:
+ shift = priv->rx_processed - priv->post_fstart;
+ ptr = map_sysmem(image_load_addr + shift,
+ rx_bytes - priv->rx_processed);
+ ret = http_parse_buf(priv, ptr,
+ rx_bytes - priv->rx_processed);
+ unmap_sysmem(ptr);
+
+ if (ret != HTTPD_REQ_OK)
+ goto error;
+ if (priv->req_state != ST_REQ_DONE)
+ return;
+ break;
+
+ default:
+ ret = http_parse_buf(priv, priv->buf + priv->rx_processed,
+ rx_bytes - priv->rx_processed);
+ if (ret != HTTPD_REQ_OK)
+ goto error;
+
+ if (priv->req_state == ST_REQ_MPFILE) {
+ /*
+ * We just switched from parsing of HTTP request
+ * headers to binary data reading. Our tcp->rx
+ * handler may put some binary data to priv->buf.
+ * It's time to copy these data to a proper place.
+ * It's required to copy whole buffer data starting
+ * from priv->rx_processed position. Otherwise we
+ * may miss data placed after the first hole.
+ */
+ size = sizeof(priv->buf) - priv->rx_processed;
+ if (size > 0) {
+ ptr = map_sysmem(image_load_addr, size);
+ memcpy(ptr, priv->buf + priv->rx_processed, size);
+ unmap_sysmem(ptr);
+ }
+
+ show_block_marker(rx_bytes - priv->post_fstart,
+ priv->post_flen);
+ }
+
+ if (priv->req_state != ST_REQ_DONE)
+ return;
+ break;
+ }
+
+ switch (priv->method) {
+ case HTTP_OPTIONS:
+ reply = &options_reply;
+ break;
+
+ case HTTP_GET:
+ case HTTP_HEAD:
+ if (!cfg->get) {
+ ret = HTTPD_BAD_REQ;
+ goto error;
+ }
+ reply = cfg->get(priv, priv->url);
+ break;
+
+ case HTTP_POST:
+ if (!cfg->post) {
+ ret = HTTPD_BAD_REQ;
+ goto error;
+ }
+ post.name = priv->post_name;
+ post.filename = priv->post_fname;
+ post.size = priv->post_flen;
+ post.addr = map_sysmem(image_load_addr, post.size);
+ reply = cfg->post(priv, priv->url, &post);
+ unmap_sysmem(post.addr);
+ break;
+
+ default:
+ ret = HTTPD_BAD_REQ;
+ goto error;
+ }
+
+ http_make_reply(priv, reply, priv->method == HTTP_HEAD);
+ return;
+
+error:
+ priv->req_state = ST_REQ_DONE;
+ switch (ret) {
+ case HTTPD_BAD_URL:
+ http_make_reply(priv, cfg->error_404, 0);
+ break;
+ case HTTPD_BAD_REQ:
+ http_make_reply(priv, cfg->error_400, 0);
+ break;
+ default:
+ tcp_stream_reset(tcp);
+ break;
+ }
+}
+
+static u32 tcp_stream_rx(struct tcp_stream *tcp, u32 rx_offs, void *buf, u32 len)
+{
+ void *ptr;
+ struct httpd_priv *priv;
+ u32 shift;
+
+ priv = tcp->priv;
+ switch (priv->req_state) {
+ case ST_REQ_DONE:
+ return len;
+ case ST_REQ_MPFILE:
+ case ST_REQ_MPEND:
+ shift = rx_offs - priv->post_fstart;
+ ptr = map_sysmem(image_load_addr + shift, len);
+ memcpy(ptr, buf, len);
+ unmap_sysmem(ptr);
+ return len;
+ default:
+ /*
+ * accept data that fits to buffer,
+ * reserve space for end of line symbol
+ */
+ if (rx_offs + len > sizeof(priv->buf) - 1)
+ len = sizeof(priv->buf) - rx_offs - 1;
+ memcpy(priv->buf + rx_offs, buf, len);
+ return len;
+ }
+}
+
+static void tcp_stream_on_snd_una_update(struct tcp_stream *tcp, u32 tx_bytes)
+{
+ struct httpd_priv *priv;
+
+ priv = tcp->priv;
+ if ((priv->req_state == ST_REQ_DONE) &&
+ (tx_bytes == priv->reply_fstart + priv->reply_flen))
+ tcp_stream_close(tcp);
+}
+
+static u32 tcp_stream_tx(struct tcp_stream *tcp, u32 tx_offs, void *buf, u32 maxlen)
+{
+ struct httpd_priv *priv;
+ u32 len, bytes = 0;
+ char *ptr;
+
+ priv = tcp->priv;
+ if (priv->req_state != ST_REQ_DONE)
+ return 0;
+
+ if (tx_offs < priv->reply_fstart) {
+ len = maxlen;
+ if (len > priv->reply_fstart - tx_offs)
+ len = priv->reply_fstart - tx_offs;
+ memcpy(buf, priv->buf + tx_offs, len);
+ buf += len;
+ tx_offs += len;
+ bytes += len;
+ maxlen -= len;
+ }
+
+ if (tx_offs >= priv->reply_fstart) {
+ if (tx_offs + maxlen > priv->reply_fstart + priv->reply_flen)
+ maxlen = priv->reply_fstart + priv->reply_flen - tx_offs;
+ if (maxlen > 0) {
+ ptr = priv->reply_fdata + tx_offs - priv->reply_fstart;
+ memcpy(buf, ptr, maxlen);
+ bytes += maxlen;
+ }
+ }
+
+ return bytes;
+}
+
+static int tcp_stream_on_create(struct tcp_stream *tcp)
+{
+ struct httpd_priv *priv;
+
+ if (!cfg || stop_server || tcp->lport != HTTP_PORT)
+ return 0;
+
+ priv = malloc(sizeof(struct httpd_priv));
+ if (!priv)
+ return 0;
+
+ memset(priv, 0, sizeof(struct httpd_priv));
+ priv->tcp = tcp;
+
+ tcp->priv = priv;
+ tcp->on_closed = tcp_stream_on_closed;
+ tcp->on_rcv_nxt_update = tcp_stream_on_rcv_nxt_update;
+ tcp->rx = tcp_stream_rx;
+ tcp->on_snd_una_update = tcp_stream_on_snd_una_update;
+ tcp->tx = tcp_stream_tx;
+ return 1;
+}
+
+void httpd_setup(struct httpd_config *config)
+{
+ cfg = config;
+}
+
+void httpd_stop(void)
+{
+ stop_server = 1;
+}
+
+void httpd_start(void)
+{
+ if (!cfg) {
+ net_set_state(NETLOOP_FAIL);
+ return;
+ }
+ stop_server = 0;
+ memset(net_server_ethaddr, 0, 6);
+ tcp_stream_set_on_create_handler(tcp_stream_on_create);
+ printf("HTTPD listening on port %d...\n", HTTP_PORT);
+}
diff --git a/net/net.c b/net/net.c
index d81604a57ce..0b6cf4ef45c 100644
--- a/net/net.c
+++ b/net/net.c
@@ -109,6 +109,7 @@
#include <net/tcp.h>
#include <net/wget.h>
#include <net/netcat.h>
+#include <net/httpd.h>
#include "arp.h"
#include "bootp.h"
#include "cdp.h"
@@ -573,6 +574,11 @@ restart:
netcat_save_start();
break;
#endif
+#if defined(CONFIG_HTTPD_COMMON)
+ case HTTPD:
+ httpd_start();
+ break;
+#endif
#if defined(CONFIG_CMD_CDP)
case CDP:
cdp_start();
--
2.43.0
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