WiFi Login

/* * Copyright 2015 Robert Foss. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the * distribution. * - Neither the name of the copyright holders nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * @author Robert Foss * * Additions & fixes: Johny Mattsson */ #include "module.h" #include "lauxlib.h" #include "lmem.h" #include "platform.h" #include "c_stdlib.h" #include "c_stdio.h" #include "c_string.h" #include "ctype.h" #include "user_interface.h" #include "espconn.h" #include "lwip/tcp.h" #include "lwip/pbuf.h" #include "flash_fs.h" #include "task/task.h" #define MIN(x, y) (((x) < (y)) ? (x) : (y)) #define LITLEN(strliteral) (sizeof (strliteral) -1) #define ENDUSER_SETUP_ERR_FATAL (1 << 0) #define ENDUSER_SETUP_ERR_NONFATAL (1 << 1) #define ENDUSER_SETUP_ERR_NO_RETURN (1 << 2) #define ENDUSER_SETUP_ERR_OUT_OF_MEMORY 1 #define ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND 2 #define ENDUSER_SETUP_ERR_UNKOWN_ERROR 3 #define ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN 4 /** * DNS Response Packet: * * |DNS ID - 16 bits| * |dns_header| * |QNAME| * |dns_body| * |ip - 32 bits| * * DNS Header Part | FLAGS | | Q COUNT | | A CNT | |AUTH CNT| | ADD CNT| */ static const char dns_header[] = { 0x80, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 }; /* DNS Query Part | Q TYPE | | Q CLASS| */ static const char dns_body[] = { 0x00, 0x01, 0x00, 0x01, /* DNS Answer Part |LBL OFFS| | TYPE | | CLASS | | TTL | | RD LEN | */ 0xC0, 0x0C, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x78, 0x00, 0x04 }; static const char http_html_filename[] = "enduser_setup.html"; static const char http_header_200[] = "HTTP/1.1 200 OK\r\nCache-control:no-cache\r\nContent-Type: text/html\r\n"; /* Note single \r\n here! */ static const char http_header_204[] = "HTTP/1.1 204 No Content\r\n\r\n"; static const char http_header_302[] = "HTTP/1.1 302 Moved\r\nLocation: /\r\n\r\n"; static const char http_header_401[] = "HTTP/1.1 401 Bad request\r\n\r\n"; static const char http_header_404[] = "HTTP/1.1 404 Not found\r\n\r\n"; static const char http_header_500[] = "HTTP/1.1 500 Internal Error\r\n\r\n"; /* The below is the un-minified version of the http_html_backup[] string. * Minified using https://kangax.github.io/html-minifier/ * Note: using method="get" due to iOS not always sending body in same * packet as the HTTP header, and us thus missing it in that case */ #if 0 WiFi Login

#endif static const char http_html_backup[] = "WiFi Login

"; typedef struct scan_listener { struct tcp_pcb *conn; struct scan_listener *next; } scan_listener_t; typedef struct { struct espconn *espconn_dns_udp; struct tcp_pcb *http_pcb; char *http_payload_data; uint32_t http_payload_len; os_timer_t check_station_timer; os_timer_t shutdown_timer; int lua_connected_cb_ref; int lua_err_cb_ref; int lua_dbg_cb_ref; scan_listener_t *scan_listeners; } enduser_setup_state_t; static enduser_setup_state_t *state; static bool manual = false; static task_handle_t do_station_cfg_handle; static int enduser_setup_manual(lua_State* L); static int enduser_setup_start(lua_State* L); static int enduser_setup_stop(lua_State* L); static void enduser_setup_stop_callback(void *ptr); static void enduser_setup_station_start(void); static void enduser_setup_ap_start(void); static void enduser_setup_ap_stop(void); static void enduser_setup_check_station(void *p); static void enduser_setup_debug(int line, const char *str); #define ENDUSER_SETUP_DEBUG_ENABLE 0 #if ENDUSER_SETUP_DEBUG_ENABLE #define ENDUSER_SETUP_DEBUG(str) enduser_setup_debug(__LINE__, str) #else #define ENDUSER_SETUP_DEBUG(str) do {} while(0) #endif #define ENDUSER_SETUP_ERROR(str, err, err_severity) \ do { \ ENDUSER_SETUP_DEBUG(str); \ if (err_severity & ENDUSER_SETUP_ERR_FATAL) enduser_setup_stop(lua_getstate());\ enduser_setup_error(__LINE__, str, err);\ if (!(err_severity & ENDUSER_SETUP_ERR_NO_RETURN)) \ return err; \ } while (0) #define ENDUSER_SETUP_ERROR_VOID(str, err, err_severity) \ do { \ ENDUSER_SETUP_DEBUG(str); \ if (err_severity & ENDUSER_SETUP_ERR_FATAL) enduser_setup_stop(lua_getstate());\ enduser_setup_error(__LINE__, str, err);\ if (!(err_severity & ENDUSER_SETUP_ERR_NO_RETURN)) \ return; \ } while (0) static void enduser_setup_debug(int line, const char *str) { lua_State *L = lua_getstate(); if(state != NULL && state->lua_dbg_cb_ref != LUA_NOREF) { lua_rawgeti(L, LUA_REGISTRYINDEX, state->lua_dbg_cb_ref); lua_pushfstring(L, "%d: \t%s", line, str); lua_call(L, 1, 0); } } static void enduser_setup_error(int line, const char *str, int err) { ENDUSER_SETUP_DEBUG("enduser_setup_error"); lua_State *L = lua_getstate(); if (state != NULL && state->lua_err_cb_ref != LUA_NOREF) { lua_rawgeti (L, LUA_REGISTRYINDEX, state->lua_err_cb_ref); lua_pushnumber(L, err); lua_pushfstring(L, "%d: \t%s", line, str); lua_call (L, 2, 0); } } static void enduser_setup_connected_callback() { ENDUSER_SETUP_DEBUG("enduser_setup_connected_callback"); lua_State *L = lua_getstate(); if (state != NULL && state->lua_connected_cb_ref != LUA_NOREF) { lua_rawgeti(L, LUA_REGISTRYINDEX, state->lua_connected_cb_ref); lua_call(L, 0, 0); } } static void enduser_setup_check_station_start(void) { ENDUSER_SETUP_DEBUG("enduser_setup_check_station_start"); os_timer_setfn(&(state->check_station_timer), enduser_setup_check_station, NULL); os_timer_arm(&(state->check_station_timer), 1*1000, TRUE); } static void enduser_setup_check_station_stop(void) { ENDUSER_SETUP_DEBUG("enduser_setup_check_station_stop"); if (state != NULL) { os_timer_disarm(&(state->check_station_timer)); } } /** * Check Station * * Check that we've successfully entered station mode. */ static void enduser_setup_check_station(void *p) { ENDUSER_SETUP_DEBUG("enduser_setup_check_station"); (void)p; struct ip_info ip; c_memset(&ip, 0, sizeof(struct ip_info)); wifi_get_ip_info(STATION_IF, &ip); int i; char has_ip = 0; for (i = 0; i < sizeof(struct ip_info); ++i) { has_ip |= ((char *) &ip)[i]; } if (has_ip == 0) { return; } enduser_setup_check_station_stop(); enduser_setup_connected_callback(); /* Trigger shutdown, but allow time for HTTP client to fetch last status. */ if (!manual) { os_timer_setfn(&(state->shutdown_timer), enduser_setup_stop_callback, NULL); os_timer_arm(&(state->shutdown_timer), 10*1000, FALSE); } } /* --- Connection closing handling ----------------------------------------- */ /* It is far more memory efficient to let the other end close the connection * first and respond to that, than us initiating the closing. The latter * seems to leave the pcb in a fin_wait state for a long time, which can * starve us of memory over time. * * By instead using the poll function to schedule a hard abort a few seconds * from now we achieve a deadline close. The downside is a (very) slight * risk of dropping the connection early, but in this application that's * hidden by the retries on the JavaScript side anyway. */ /* Callback on timeout to hard-close a connection */ static err_t force_abort (void *arg, struct tcp_pcb *pcb) { (void)arg; tcp_poll (pcb, 0, 0); tcp_abort (pcb); return ERR_ABRT; } /* Callback to detect a remote-close of a connection */ static err_t handle_remote_close (void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) { (void)arg; (void)err; if (p) /* server sent us data, just ACK and move on */ { tcp_recved (pcb, p->tot_len); pbuf_free (p); } else /* hey, remote end closed, we can do a soft close safely, yay! */ { tcp_recv (pcb, 0); tcp_poll (pcb, 0, 0); tcp_close (pcb); } return ERR_OK; } /* Set up a deferred close of a connection, as discussed above. */ static inline void deferred_close (struct tcp_pcb *pcb) { tcp_poll (pcb, force_abort, 15); /* ~3sec from now */ tcp_recv (pcb, handle_remote_close); tcp_sent (pcb, 0); } /* Convenience function to queue up a close-after-send. */ static err_t close_once_sent (void *arg, struct tcp_pcb *pcb, u16_t len) { (void)arg; (void)len; deferred_close (pcb); return ERR_OK; } /* ------------------------------------------------------------------------- */ /** * Search String * * Search string for first occurance of any char in srch_str. * * @return -1 iff no occurance of char was found. */ static int enduser_setup_srch_str(const char *str, const char *srch_str) { char *found = strpbrk (str, srch_str); if (!found) { return -1; } else { return found - str; } } /** * Load HTTP Payload * * @return - 0 iff payload loaded successfully * 1 iff backup html was loaded * 2 iff out of memory */ static int enduser_setup_http_load_payload(void) { ENDUSER_SETUP_DEBUG("enduser_setup_http_load_payload"); int f = fs_open(http_html_filename, fs_mode2flag("r")); int err = fs_seek(f, 0, FS_SEEK_END); int file_len = (int) fs_tell(f); int err2 = fs_seek(f, 0, FS_SEEK_SET); const char cl_hdr[] = "Content-length:%5d\r\n\r\n"; const size_t cl_len = LITLEN(cl_hdr) + 3; /* room to expand %4d */ if (f == 0 || err == -1 || err2 == -1) { ENDUSER_SETUP_DEBUG("enduser_setup_http_load_payload unable to load file enduser_setup.html, loading backup HTML."); int payload_len = LITLEN(http_header_200) + cl_len + LITLEN(http_html_backup); state->http_payload_len = payload_len; state->http_payload_data = (char *) c_malloc(payload_len); if (state->http_payload_data == NULL) { return 2; } int offset = 0; c_memcpy(&(state->http_payload_data[offset]), &(http_header_200), LITLEN(http_header_200)); offset += LITLEN(http_header_200); offset += c_sprintf(state->http_payload_data + offset, cl_hdr, LITLEN(http_html_backup)); c_memcpy(&(state->http_payload_data[offset]), &(http_html_backup), LITLEN(http_html_backup)); return 1; } int payload_len = LITLEN(http_header_200) + cl_len + file_len; state->http_payload_len = payload_len; state->http_payload_data = (char *) c_malloc(payload_len); if (state->http_payload_data == NULL) { return 2; } int offset = 0; c_memcpy(&(state->http_payload_data[offset]), &(http_header_200), LITLEN(http_header_200)); offset += LITLEN(http_header_200); offset += c_sprintf(state->http_payload_data + offset, cl_hdr, file_len); fs_read(f, &(state->http_payload_data[offset]), file_len); return 0; } /** * De-escape URL data * * Parse escaped and form encoded data of request. * * @return - return 0 iff the HTTP parameter is decoded into a valid string. */ static int enduser_setup_http_urldecode(char *dst, const char *src, int src_len, int dst_len) { ENDUSER_SETUP_DEBUG("enduser_setup_http_urldecode"); char *dst_start = dst; char *dst_last = dst + dst_len - 1; /* -1 to reserve space for last \0 */ char a, b; int i; for (i = 0; i < src_len && *src && dst < dst_last; ++i) { if ((*src == '%') && ((a = src[1]) && (b = src[2])) && (isxdigit(a) && isxdigit(b))) { if (a >= 'a') { a -= 'a'-'A'; } if (a >= 'A') { a -= ('A' - 10); } else { a -= '0'; } if (b >= 'a') { b -= 'a'-'A'; } if (b >= 'A') { b -= ('A' - 10); } else { b -= '0'; } *dst++ = 16 * a + b; src += 3; i += 2; } else { char c = *src++; if (c == '+') { c = ' '; } *dst++ = c; } } *dst++ = '\0'; return (i < src_len); /* did we fail to process all the input? */ } /** * Task to do the actual station configuration. * This config *cannot* be done in the network receive callback or serious * issues like memory corruption occur. */ static void do_station_cfg (task_param_t param, uint8_t prio) { struct station_config *cnf = (struct station_config *)param; (void)prio; /* Best-effort disconnect-reconfig-reconnect. If the device is currently * connected, the disconnect will work but the connect will report failure * (though it will actually start connecting). If the devices is not * connected, the disconnect may fail but the connect will succeed. A * solid head-in-the-sand approach seems to be the best tradeoff on * functionality-vs-code-size. * TODO: maybe use an error callback to at least report if the set config * call fails. */ wifi_station_disconnect (); wifi_station_set_config (cnf); wifi_station_connect (); luaM_free(lua_getstate(), cnf); } /** * Handle HTTP Credentials * * @return - return 0 iff credentials are found and handled successfully * return 1 iff credentials aren't found * return 2 iff an error occured */ static int enduser_setup_http_handle_credentials(char *data, unsigned short data_len) { ENDUSER_SETUP_DEBUG("enduser_setup_http_handle_credentials"); char *name_str = (char *) ((uint32_t)strstr(&(data[6]), "wifi_ssid=")); char *pwd_str = (char *) ((uint32_t)strstr(&(data[6]), "wifi_password=")); if (name_str == NULL || pwd_str == NULL) { ENDUSER_SETUP_DEBUG("Password or SSID string not found"); return 1; } int name_field_len = LITLEN("wifi_ssid="); int pwd_field_len = LITLEN("wifi_password="); char *name_str_start = name_str + name_field_len; char *pwd_str_start = pwd_str + pwd_field_len; int name_str_len = enduser_setup_srch_str(name_str_start, "& "); int pwd_str_len = enduser_setup_srch_str(pwd_str_start, "& "); if (name_str_len == -1 || pwd_str_len == -1) { ENDUSER_SETUP_DEBUG("Password or SSID HTTP paramter divider not found"); return 1; } struct station_config *cnf = luaM_malloc(lua_getstate(), sizeof(struct station_config)); c_memset(cnf, 0, sizeof(struct station_config)); int err; err = enduser_setup_http_urldecode(cnf->ssid, name_str_start, name_str_len, sizeof(cnf->ssid)); err |= enduser_setup_http_urldecode(cnf->password, pwd_str_start, pwd_str_len, sizeof(cnf->password)); if (err != 0) { ENDUSER_SETUP_DEBUG("Unable to decode HTTP parameter to valid password or SSID"); return 1; } ENDUSER_SETUP_DEBUG(""); ENDUSER_SETUP_DEBUG("WiFi Credentials Stored"); ENDUSER_SETUP_DEBUG("-----------------------"); ENDUSER_SETUP_DEBUG("name: "); ENDUSER_SETUP_DEBUG(cnf->ssid); ENDUSER_SETUP_DEBUG("pass: "); ENDUSER_SETUP_DEBUG(cnf->password); ENDUSER_SETUP_DEBUG("-----------------------"); ENDUSER_SETUP_DEBUG(""); task_post_medium(do_station_cfg_handle, (task_param_t) cnf); return 0; } /** * Serve HTML * * @return - return 0 iff html was served successfully */ static int enduser_setup_http_serve_header(struct tcp_pcb *http_client, const char *header, uint32_t header_len) { ENDUSER_SETUP_DEBUG("enduser_setup_http_serve_header"); err_t err = tcp_write (http_client, header, header_len, TCP_WRITE_FLAG_COPY); if (err != ERR_OK) { deferred_close (http_client); ENDUSER_SETUP_ERROR("http_serve_header failed on tcp_write", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL); } return 0; } static err_t streamout_sent (void *arg, struct tcp_pcb *pcb, u16_t len) { (void)len; unsigned offs = (unsigned)arg; if (!state || !state->http_payload_data) { tcp_abort (pcb); return ERR_ABRT; } unsigned wanted_len = state->http_payload_len - offs; unsigned buf_free = tcp_sndbuf (pcb); if (buf_free < wanted_len) wanted_len = buf_free; /* no-copy write */ err_t err = tcp_write (pcb, state->http_payload_data + offs, wanted_len, 0); if (err != ERR_OK) { ENDUSER_SETUP_DEBUG("streaming out html failed"); tcp_abort (pcb); return ERR_ABRT; } offs += wanted_len; if (offs >= state->http_payload_len) { tcp_sent (pcb, 0); deferred_close (pcb); } else tcp_arg (pcb, (void *)offs); return ERR_OK; } /** * Serve HTML * * @return - return 0 iff html was served successfully */ static int enduser_setup_http_serve_html(struct tcp_pcb *http_client) { ENDUSER_SETUP_DEBUG("enduser_setup_http_serve_html"); if (state->http_payload_data == NULL) { enduser_setup_http_load_payload(); } unsigned chunklen = tcp_sndbuf (http_client); tcp_arg (http_client, (void *)chunklen); tcp_recv (http_client, 0); /* avoid confusion about the tcp_arg */ tcp_sent (http_client, streamout_sent); /* Begin the no-copy stream-out here */ err_t err = tcp_write (http_client, state->http_payload_data, chunklen, 0); if (err != 0) { ENDUSER_SETUP_ERROR("http_serve_html failed. tcp_write failed", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL); } return 0; } static void serve_status(struct tcp_pcb *conn) { ENDUSER_SETUP_DEBUG("enduser_setup_serve_status"); const char fmt[] = "HTTP/1.1 200 OK\r\n" "Cache-control:no-cache\r\n" "Connection:close\r\n" "Content-type:text/plain\r\n" "Content-length: %d\r\n" "\r\n" "%s%s"; const char *state[] = { "Idle.", "Connecting to \"%s\".", "Failed to connect to \"%s\" - Wrong password.", "Failed to connect to \"%s\" - Network not found.", "Failed to connect.", "Connected to \"%s\"." }; const size_t num_states = sizeof(state)/sizeof(state[0]); uint8_t curr_state = wifi_station_get_connect_status (); if (curr_state < num_states) { switch (curr_state) { case STATION_CONNECTING: case STATION_WRONG_PASSWORD: case STATION_NO_AP_FOUND: case STATION_GOT_IP: { const char *s = state[curr_state]; struct station_config config; wifi_station_get_config(&config); config.ssid[31] = '\0'; int state_len = c_strlen(s); int ssid_len = c_strlen(config.ssid); int status_len = state_len + ssid_len + 1; char status_buf[status_len]; memset(status_buf, 0, status_len); status_len = c_sprintf(status_buf, s, config.ssid); int buf_len = sizeof(fmt) + status_len + 10; //10 = (9+1), 1 byte is '\0' and 9 are reserved for length field char buf[buf_len]; memset(buf, 0, buf_len); int output_len = c_sprintf(buf, fmt, status_len, status_buf); enduser_setup_http_serve_header(conn, buf, output_len); } break; /* Handle non-formatted strings */ default: { const char *s = state[curr_state]; int status_len = c_strlen(s); int buf_len = sizeof(fmt) + status_len + 10; //10 = (9+1), 1 byte is '\0' and 9 are reserved for length field char buf[buf_len]; memset(buf, 0, buf_len); int output_len = c_sprintf(buf, fmt, status_len, s); enduser_setup_http_serve_header(conn, buf, output_len); } break; } } else { enduser_setup_http_serve_header(conn, http_header_500, LITLEN(http_header_500)); } } /* --- WiFi AP scanning support -------------------------------------------- */ static void free_scan_listeners (void) { if (!state || !state->scan_listeners) { return; } scan_listener_t *l = state->scan_listeners , *next = 0; while (l) { next = l->next; c_free (l); l = next; } state->scan_listeners = 0; } static void remove_scan_listener (scan_listener_t *l) { if (state) { scan_listener_t **sl = &state->scan_listeners; while (*sl) { /* Remove any and all references to the closed conn from the scan list */ if (*sl == l) { *sl = l->next; c_free (l); /* No early exit to guard against multi-entry on list */ } else sl = &(*sl)->next; } } } static char *escape_ssid (char *dst, const char *src) { for (int i = 0; i < 32 && src[i]; ++i) { if (src[i] == '\\' || src[i] == '"') { *dst++ = '\\'; } *dst++ = src[i]; } return dst; } static void notify_scan_listeners (const char *payload, size_t sz) { if (!state) { return; } for (scan_listener_t *l = state->scan_listeners; l; l = l->next) { if (tcp_write (l->conn, payload, sz, TCP_WRITE_FLAG_COPY) != ERR_OK) { ENDUSER_SETUP_DEBUG("failed to send wifi list"); tcp_abort (l->conn); } else tcp_sent (l->conn, close_once_sent); /* TODO: time-out sends? */ l->conn = 0; } free_scan_listeners (); } static void on_scan_done (void *arg, STATUS status) { if (!state || !state->scan_listeners) { return; } if (status == OK) { unsigned num_nets = 0; for (struct bss_info *wn = arg; wn; wn = wn->next.stqe_next) { ++num_nets; } const char header_fmt[] = "HTTP/1.1 200 OK\r\n" "Connection:close\r\n" "Cache-control:no-cache\r\n" "Content-type:application/json\r\n" "Content-length:%4d\r\n" "\r\n"; const size_t hdr_sz = sizeof (header_fmt) +1 -1; /* +expand %4d, -\0 */ /* To be able to safely escape a pathological SSID, we need 2*32 bytes */ const size_t max_entry_sz = sizeof("{\"ssid\":\"\",\"rssi\":},") + 2*32 + 6; const size_t alloc_sz = hdr_sz + num_nets * max_entry_sz + 3; char *http = os_zalloc (alloc_sz); if (!http) { goto serve_500; } char *p = http + hdr_sz; /* start body where we know it will be */ /* p[0] will be clobbered when we print the header, so fill it in last */ ++p; for (struct bss_info *wn = arg; wn; wn = wn->next.stqe_next) { if (wn != arg) { *p++ = ','; } const char entry_start[] = "{\"ssid\":\""; strcpy (p, entry_start); p += sizeof (entry_start) -1; p = escape_ssid (p, wn->ssid); const char entry_mid[] = "\",\"rssi\":"; strcpy (p, entry_mid); p += sizeof (entry_mid) -1; p += c_sprintf (p, "%d", wn->rssi); *p++ = '}'; } *p++ = ']'; size_t body_sz = (p - http) - hdr_sz; c_sprintf (http, header_fmt, body_sz); http[hdr_sz] = '['; /* Rewrite the \0 with the correct start of body */ notify_scan_listeners (http, hdr_sz + body_sz); c_free (http); return; } serve_500: notify_scan_listeners (http_header_500, LITLEN(http_header_500)); } /* ---- end WiFi AP scan support ------------------------------------------- */ static err_t enduser_setup_http_recvcb(void *arg, struct tcp_pcb *http_client, struct pbuf *p, err_t err) { ENDUSER_SETUP_DEBUG("enduser_setup_http_recvcb"); if (!state || err != ERR_OK) { if (!state) ENDUSER_SETUP_DEBUG("ignoring received data while stopped"); tcp_abort (http_client); return ERR_ABRT; } if (!p) /* remote side closed, close our end too */ { ENDUSER_SETUP_DEBUG("connection closed"); scan_listener_t *l = arg; /* if it's waiting for scan, we have a ptr here */ if (l) remove_scan_listener (l); deferred_close (http_client); return ERR_OK; } char *data = os_zalloc (p->tot_len + 1); if (!data) return ERR_MEM; unsigned data_len = pbuf_copy_partial (p, data, p->tot_len, 0); tcp_recved (http_client, p->tot_len); pbuf_free (p); err_t ret = ERR_OK; if (c_strncmp(data, "GET ", 4) == 0) { if (c_strncmp(data + 4, "/ ", 2) == 0) { if (enduser_setup_http_serve_html(http_client) != 0) { ENDUSER_SETUP_ERROR("http_recvcb failed. Unable to send HTML.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL); } else { goto free_out; /* streaming now in progress */ } } else if (c_strncmp(data + 4, "/aplist ", 8) == 0) { scan_listener_t *l = os_malloc (sizeof (scan_listener_t)); if (!l) { ENDUSER_SETUP_ERROR("out of memory", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_NONFATAL); } bool already = (state->scan_listeners != NULL); tcp_arg (http_client, l); /* TODO: check if also need a tcp_err() cb, or if recv() is enough */ l->conn = http_client; l->next = state->scan_listeners; state->scan_listeners = l; if (!already) { if (!wifi_station_scan(NULL, on_scan_done)) { enduser_setup_http_serve_header(http_client, http_header_500, LITLEN(http_header_500)); deferred_close (l->conn); l->conn = 0; free_scan_listeners(); } } goto free_out; /* request queued */ } else if (c_strncmp(data + 4, "/status ", 8) == 0) { serve_status(http_client); } else if (c_strncmp(data + 4, "/update?", 8) == 0) { switch (enduser_setup_http_handle_credentials(data, data_len)) { case 0: enduser_setup_http_serve_header(http_client, http_header_302, LITLEN(http_header_302)); break; case 1: enduser_setup_http_serve_header(http_client, http_header_401, LITLEN(http_header_401)); break; default: ENDUSER_SETUP_ERROR("http_recvcb failed. Failed to handle wifi credentials.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL); break; } } else if (c_strncmp(data + 4, "/generate_204 ", 14) == 0) { /* Convince Android devices that they have internet access to avoid pesky dialogues. */ enduser_setup_http_serve_header(http_client, http_header_204, LITLEN(http_header_204)); } else { ENDUSER_SETUP_DEBUG("serving 404"); ENDUSER_SETUP_DEBUG(data + 4); enduser_setup_http_serve_header(http_client, http_header_404, LITLEN(http_header_404)); } } else /* not GET */ { enduser_setup_http_serve_header(http_client, http_header_401, LITLEN(http_header_401)); } deferred_close (http_client); free_out: os_free (data); return ret; } static err_t enduser_setup_http_connectcb(void *arg, struct tcp_pcb *pcb, err_t err) { ENDUSER_SETUP_DEBUG("enduser_setup_http_connectcb"); if (!state) { ENDUSER_SETUP_DEBUG("connect callback but no state?!"); tcp_abort (pcb); return ERR_ABRT; } tcp_accepted (state->http_pcb); tcp_recv (pcb, enduser_setup_http_recvcb); tcp_nagle_disable (pcb); return ERR_OK; } static int enduser_setup_http_start(void) { ENDUSER_SETUP_DEBUG("enduser_setup_http_start"); struct tcp_pcb *pcb = tcp_new (); if (pcb == NULL) { ENDUSER_SETUP_ERROR("http_start failed. Memory allocation failed (http_pcb == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL); } if (tcp_bind (pcb, IP_ADDR_ANY, 80) != ERR_OK) { ENDUSER_SETUP_ERROR("http_start bind failed", ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN, ENDUSER_SETUP_ERR_FATAL); } state->http_pcb = tcp_listen (pcb); if (!state->http_pcb) { tcp_abort(pcb); /* original wasn't freed for us */ ENDUSER_SETUP_ERROR("http_start listen failed", ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN, ENDUSER_SETUP_ERR_FATAL); } tcp_accept (state->http_pcb, enduser_setup_http_connectcb); /* TODO: check lwip tcp timeouts */ #if 0 err = espconn_regist_time(state->espconn_http_tcp, 2, 0); if (err == ESPCONN_ARG) { ENDUSER_SETUP_ERROR("http_start failed. Unable to set TCP timeout.", ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND, ENDUSER_SETUP_ERR_NONFATAL | ENDUSER_SETUP_ERR_NO_RETURN); } #endif int err = enduser_setup_http_load_payload(); if (err == 1) { ENDUSER_SETUP_DEBUG("enduser_setup_http_start info. Loaded backup HTML."); } else if (err == 2) { ENDUSER_SETUP_ERROR("http_start failed. Unable to allocate memory for HTTP payload.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL); } return 0; } static void enduser_setup_http_stop(void) { ENDUSER_SETUP_DEBUG("enduser_setup_http_stop"); if (state && state->http_pcb) { tcp_close (state->http_pcb); /* cannot fail for listening sockets */ state->http_pcb = 0; } } static void enduser_setup_ap_stop(void) { ENDUSER_SETUP_DEBUG("enduser_setup_station_stop"); wifi_set_opmode(~SOFTAP_MODE & wifi_get_opmode()); } static void enduser_setup_ap_start(void) { ENDUSER_SETUP_DEBUG("enduser_setup_ap_start"); struct softap_config cnf; c_memset(&(cnf), 0, sizeof(struct softap_config)); #ifndef ENDUSER_SETUP_AP_SSID #define ENDUSER_SETUP_AP_SSID "SetupGadget" #endif char ssid[] = ENDUSER_SETUP_AP_SSID; int ssid_name_len = c_strlen(ssid); c_memcpy(&(cnf.ssid), ssid, ssid_name_len); uint8_t mac[6]; wifi_get_macaddr(SOFTAP_IF, mac); cnf.ssid[ssid_name_len] = '_'; c_sprintf(cnf.ssid + ssid_name_len + 1, "%02X%02X%02X", mac[3], mac[4], mac[5]); cnf.ssid_len = ssid_name_len + 7; cnf.channel = 1; cnf.authmode = AUTH_OPEN; cnf.ssid_hidden = 0; cnf.max_connection = 5; cnf.beacon_interval = 100; wifi_set_opmode(STATIONAP_MODE); wifi_softap_set_config(&cnf); } static void enduser_setup_dns_recv_callback(void *arg, char *recv_data, unsigned short recv_len) { ENDUSER_SETUP_DEBUG("enduser_setup_dns_recv_callback."); struct espconn *callback_espconn = arg; struct ip_info ip_info; uint32_t qname_len = c_strlen(&(recv_data[12])) + 1; // \0=1byte uint32_t dns_reply_static_len = (uint32_t) sizeof(dns_header) + (uint32_t) sizeof(dns_body) + 2 + 4; // dns_id=2bytes, ip=4bytes uint32_t dns_reply_len = dns_reply_static_len + qname_len; uint8_t if_mode = wifi_get_opmode(); if ((if_mode & SOFTAP_MODE) == 0) { ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Interface mode not supported.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL); } uint8_t if_index = (if_mode == STATION_MODE? STATION_IF : SOFTAP_IF); if (wifi_get_ip_info(if_index , &ip_info) == false) { ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Unable to get interface IP.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL); } char *dns_reply = (char *) c_malloc(dns_reply_len); if (dns_reply == NULL) { ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Failed to allocate memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_NONFATAL); } uint32_t insert_byte = 0; c_memcpy(&(dns_reply[insert_byte]), recv_data, 2); insert_byte += 2; c_memcpy(&(dns_reply[insert_byte]), dns_header, sizeof(dns_header)); insert_byte += (uint32_t) sizeof(dns_header); c_memcpy(&(dns_reply[insert_byte]), &(recv_data[12]), qname_len); insert_byte += qname_len; c_memcpy(&(dns_reply[insert_byte]), dns_body, sizeof(dns_body)); insert_byte += (uint32_t) sizeof(dns_body); c_memcpy(&(dns_reply[insert_byte]), &(ip_info.ip), 4); // SDK 1.4.0 changed behaviour, for UDP server need to look up remote ip/port remot_info *pr = 0; if (espconn_get_connection_info(callback_espconn, &pr, 0) != ESPCONN_OK) { ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Unable to get IP of UDP sender.", ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND, ENDUSER_SETUP_ERR_FATAL); } callback_espconn->proto.udp->remote_port = pr->remote_port; os_memmove(callback_espconn->proto.udp->remote_ip, pr->remote_ip, 4); int8_t err; err = espconn_send(callback_espconn, dns_reply, dns_reply_len); c_free(dns_reply); if (err == ESPCONN_MEM) { ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Failed to allocate memory for send.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL); } else if (err == ESPCONN_ARG) { ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Can't execute transmission.", ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND, ENDUSER_SETUP_ERR_FATAL); } else if (err != 0) { ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. espconn_send failed", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL); } } static void enduser_setup_free(void) { ENDUSER_SETUP_DEBUG("enduser_setup_free"); if (state == NULL) { return; } /* Make sure no running timers are left. */ os_timer_disarm(&(state->check_station_timer)); os_timer_disarm(&(state->shutdown_timer)); if (state->espconn_dns_udp != NULL) { if (state->espconn_dns_udp->proto.udp != NULL) { c_free(state->espconn_dns_udp->proto.udp); } c_free(state->espconn_dns_udp); } c_free(state->http_payload_data); free_scan_listeners (); c_free(state); state = NULL; } static int enduser_setup_dns_start(void) { ENDUSER_SETUP_DEBUG("enduser_setup_dns_start"); if (state->espconn_dns_udp != NULL) { ENDUSER_SETUP_ERROR("dns_start failed. Appears to already be started (espconn_dns_udp != NULL).", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL); } state->espconn_dns_udp = (struct espconn *) c_malloc(sizeof(struct espconn)); if (state->espconn_dns_udp == NULL) { ENDUSER_SETUP_ERROR("dns_start failed. Memory allocation failed (espconn_dns_udp == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL); } esp_udp *esp_udp_data = (esp_udp *) c_malloc(sizeof(esp_udp)); if (esp_udp_data == NULL) { ENDUSER_SETUP_ERROR("dns_start failed. Memory allocation failed (esp_udp == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL); } c_memset(state->espconn_dns_udp, 0, sizeof(struct espconn)); c_memset(esp_udp_data, 0, sizeof(esp_udp)); state->espconn_dns_udp->proto.udp = esp_udp_data; state->espconn_dns_udp->type = ESPCONN_UDP; state->espconn_dns_udp->state = ESPCONN_NONE; esp_udp_data->local_port = 53; int8_t err; err = espconn_regist_recvcb(state->espconn_dns_udp, enduser_setup_dns_recv_callback); if (err != 0) { ENDUSER_SETUP_ERROR("dns_start failed. Couldn't add receive callback, unknown error.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL); } err = espconn_create(state->espconn_dns_udp); if (err == ESPCONN_ISCONN) { ENDUSER_SETUP_ERROR("dns_start failed. Couldn't create connection, already listening for that connection.", ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN, ENDUSER_SETUP_ERR_FATAL); } else if (err == ESPCONN_MEM) { ENDUSER_SETUP_ERROR("dns_start failed. Couldn't create connection, out of memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL); } else if (err != 0) { ENDUSER_SETUP_ERROR("dns_start failed. Couldn't create connection, unknown error.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL); } return 0; } static void enduser_setup_dns_stop(void) { ENDUSER_SETUP_DEBUG("enduser_setup_dns_stop"); if (state != NULL && state->espconn_dns_udp != NULL) { espconn_delete(state->espconn_dns_udp); } } static int enduser_setup_init(lua_State *L) { ENDUSER_SETUP_DEBUG("enduser_setup_init"); if (state != NULL) { ENDUSER_SETUP_ERROR("init failed. Appears to already be started.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL); return ENDUSER_SETUP_ERR_UNKOWN_ERROR; } state = (enduser_setup_state_t *) os_zalloc(sizeof(enduser_setup_state_t)); if (state == NULL) { ENDUSER_SETUP_ERROR("init failed. Unable to allocate memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL); return ENDUSER_SETUP_ERR_OUT_OF_MEMORY; } c_memset(state, 0, sizeof(enduser_setup_state_t)); state->lua_connected_cb_ref = LUA_NOREF; state->lua_err_cb_ref = LUA_NOREF; state->lua_dbg_cb_ref = LUA_NOREF; if (!lua_isnoneornil(L, 1)) { lua_pushvalue(L, 1); state->lua_connected_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX); } else { state->lua_connected_cb_ref = LUA_NOREF; } if (!lua_isnoneornil(L, 2)) { lua_pushvalue (L, 2); state->lua_err_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX); } else { state->lua_err_cb_ref = LUA_NOREF; } if (!lua_isnoneornil(L, 3)) { lua_pushvalue (L, 3); state->lua_dbg_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX); } else { state->lua_dbg_cb_ref = LUA_NOREF; } return 0; } static int enduser_setup_manual(lua_State *L) { if (!lua_isnoneornil (L, 1)) { manual = lua_toboolean (L, 1); } lua_pushboolean (L, manual); return 1; } static int enduser_setup_start(lua_State *L) { ENDUSER_SETUP_DEBUG("enduser_setup_start"); if (!do_station_cfg_handle) { do_station_cfg_handle = task_get_id(do_station_cfg); } if(enduser_setup_init(L)) { goto failed; } enduser_setup_check_station_start(); if (!manual) { enduser_setup_ap_start(); } if(enduser_setup_dns_start()) { goto failed; } if(enduser_setup_http_start()) { goto failed; } goto out; failed: enduser_setup_stop(lua_getstate()); out: return 0; } /** * A wrapper needed for type-reasons strictness reasons. */ static void enduser_setup_stop_callback(void *ptr) { enduser_setup_stop(lua_getstate()); } static int enduser_setup_stop(lua_State* L) { ENDUSER_SETUP_DEBUG("enduser_setup_stop"); if (!manual) { enduser_setup_ap_stop(); } enduser_setup_dns_stop(); enduser_setup_http_stop(); enduser_setup_free(); return 0; } static const LUA_REG_TYPE enduser_setup_map[] = { { LSTRKEY( "manual" ), LFUNCVAL( enduser_setup_manual )}, { LSTRKEY( "start" ), LFUNCVAL( enduser_setup_start )}, { LSTRKEY( "stop" ), LFUNCVAL( enduser_setup_stop )}, { LNILKEY, LNILVAL} }; NODEMCU_MODULE(ENDUSER_SETUP, "enduser_setup", enduser_setup_map, NULL);

WiFi Login

Connect gadget to your WiFi network

Status: Updating...

WiFi Login

Connect gadget to your WiFi network

Status: Updating...