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a1796f455a
ref: d-a-v/esp82xx-nonos-linklayer#31 origin: #5902 me-no-dev/ESPAsyncTCP#108 Following the links above is instructive. To summarize: * currently and from a long time lwIP tcp client connections always uses the same tcp source port number right after boot * this port number is increased everytime a new one is needed (= new tcp client connection) (to be noted, linux has the same increasing behavior) * when connecting to the same server (right after boot), the triplet (esp-ip-address, source port, destination port) are the same, and may hit remote server list of sockets in time-wait-state (previous connection unproperly closed from the same esp). Consequently the new connection fails when it happens. * this is happening only when debugging (esp reboots often, in less time than time-wait expiration), so the nasty effect is amplified especially when bugs are being chased * efforts had been done when espressif's lwIP implementation wasn't open source, with WiFiClient::setLocalPortStart() #632 but it must be explicitely called with a different random number at every reboot. Efficient but not ideal. This PR uses espressif firmware's r_rand() everytime a new local source port is needed. A different source port number is now showed by tcpdump right after boot. Source port range and duplication is verified everytime in lwIP's src/core/tcp.c:tcp_new_port(). It is implemented as a local patch for upstream lwIP so it is valid not only with WiFiClient but also with @me-no-dev's Async libraries (they don't use WiFiClient). WiFiClient::setLocalPortStart() is still usable with the same effects as before.
131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
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#ifndef __GLUE_DEBUG_H
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#define __GLUE_DEBUG_H
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// this file is commonly included by both sides of the glue
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/////////////////////////////////////////////////////////////////////////////
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// user-definable
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// this is needed separately from lwipopts.h
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// because it is shared by both sides of glue
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#define UNDEBUG 1 // 0 or 1 (1: uassert removed)
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#define UDEBUG 0 // 0 or 1 (glue debug)
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#define UDUMP 0 // 0 or 1 (glue / dump packet)
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#define UDEBUGINDEX 0 // 0 or 1 (show debug line number)
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#define UDEBUGSTORE 0 // 0 or 1 (store debug into buffer until doprint_allow=1=serial-available)
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#define ULWIPDEBUG 0 // 0 or 1 (trigger lwip debug)
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#define ULWIPASSERT 0 // 0 or 1 (trigger lwip self-check, 0 saves flash)
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#if ARDUINO
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#define STRING_IN_FLASH 1 // *print("fmt is stored in flash")
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#else
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#define STRING_IN_FLASH 0 // *print("fmt is stored in flash")
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#endif
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#define ROTBUFLEN_BIT 11 // (UDEBUGSTORE=1) doprint()'s buffer: 11=2048B
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#if ULWIPDEBUG
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//#define LWIP_DBG_TYPES_ON (LWIP_DBG_ON|LWIP_DBG_TRACE|LWIP_DBG_STATE|LWIP_DBG_FRESH|LWIP_DBG_HALT)
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#define LWIP_DBG_TYPES_ON (LWIP_DBG_ON|LWIP_DBG_TRACE|LWIP_DBG_STATE|LWIP_DBG_FRESH)
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//#define LWIP_DBG_TYPES_ON (LWIP_DBG_ON)
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#endif
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/////////////////////////////////////////////////////////////////////////////
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// packet capture callback from esp side
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#include <stdlib.h>
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#define HAS_PHY_CAPTURE 1
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#ifdef __cplusplus
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extern "C"
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#endif
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void (*phy_capture) (int netif_idx, const char* data, size_t len, int out, int success);
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/////////////////////////////////////////////////////////////////////////////
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#if ARDUINO
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#include <sys/pgmspace.h>
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#endif
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#if UDEBUG && UDEBUGSTORE
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#warning use 'doprint_allow=1' right after Serial is enabled
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extern int doprint_allow;
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#endif
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// print definitions:
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// uprint(): always used by glue, defined as doprint() in debug mode or nothing()
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// os_printf(): can be redefined as doprint()
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// doprint(): always print, can be os_printf_plus() or defined in doprint.c (buffered)
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// in buffered mode: doprint_allow=1 is needed after Serial.begin
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#if STRING_IN_FLASH && !defined(USE_OPTIMIZE_PRINTF)
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#define USE_OPTIMIZE_PRINTF // at least used in arduino/esp8266
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#endif
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// os_printf_plus() missing in osapi.h (fixed in arduino's sdk-2.1):
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//extern int os_printf_plus (const char * format, ...) __attribute__ ((format (printf, 1, 2)));
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#include <osapi.h> // os_printf* definitions + ICACHE_RODATA_ATTR
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#if UDEBUG && (UDEBUGINDEX || UDEBUGSTORE)
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// doprint() is used
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#undef os_printf
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#define os_printf(x...) do { doprint(x); } while (0)
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#if STRING_IN_FLASH
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#define doprint(fmt, ...) \
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do { \
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static const char flash_str[] ICACHE_RODATA_ATTR STORE_ATTR = fmt; \
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doprint_minus(flash_str, ##__VA_ARGS__); \
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} while(0)
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#else // !STRING_IN_FLASH
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#define doprint(fmt, ...) doprint_minus(fmt, ##__VA_ARGS__)
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#endif // !STRING_IN_FLASH
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int doprint_minus (const char* format, ...) __attribute__ ((format (printf, 1, 2))); // format in flash
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#else // !( UDEBUG && (UDEBUGINDEX || UDEBUGSTORE) )
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#define doprint(x...) do { os_printf(x); } while (0)
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#endif // !( UDEBUG && (UDEBUGINDEX || UDEBUGSTORE) )
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#if UDEBUG
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#define uprint(x...) do { doprint(x); } while (0)
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#else
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#define uprint(x...) do { (void)0; } while (0)
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#endif
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#if ARDUINO
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#define udoassert(assertion...) \
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do { if ((assertion) == 0) { \
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static const char assrt[] ICACHE_RODATA_ATTR STORE_ATTR = #assertion " wrong@"; \
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os_printf_plus(assrt); \
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static const char assrt_file[] ICACHE_RODATA_ATTR STORE_ATTR = __FILE__; \
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os_printf_plus(assrt_file); \
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static const char assrt_line[] ICACHE_RODATA_ATTR STORE_ATTR = ":%d\n"; \
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os_printf_plus(assrt_line, __LINE__); \
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uhalt(); \
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} } while (0)
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#else
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#define udoassert(assertion...) do { if ((assertion) == 0) { os_printf("assert fail: " #assertion " @%s:%d\n", __FILE__, __LINE__); uhalt(); } } while (0)
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#endif
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#if UNDEBUG
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#define uassert(assertion...) do { (void)0; } while (0)
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#else // !defined(UNDEBUG)
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#define uassert(assertion...) udoassert(assertion)
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#endif // !defined(UNDEBUG)
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#define ualwaysassert(assertion...) udoassert(assertion)
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#define uerror(x...) do { doprint(x); } while (0)
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#define uhalt() do { *((int*)0) = 0; /* this triggers gdb */ } while (0)
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#define nl() do { uprint("\n"); } while (0)
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#endif
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