/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2014-2018 Paul Sokolovsky * Copyright (c) 2014-2019 Damien P. George * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "py/objtuple.h" #include "py/objstr.h" #include "py/runtime.h" #include "py/stream.h" #include "py/builtin.h" #include "py/mphal.h" #include "py/mpthread.h" #include "extmod/vfs.h" #include /* The idea of this module is to implement reasonable minimum of socket-related functions to write typical clients and servers. The module named "usocket" on purpose, to allow to make Python-level module more (or fully) compatible with CPython "socket", e.g.: ---- socket.py ---- from usocket import * from socket_more_funcs import * from socket_more_funcs2 import * ------------------- I.e. this module should stay lean, and more functions (if needed) should be add to separate modules (C or Python level). */ // This type must "inherit" from mp_obj_fdfile_t, i.e. matching subset of // fields should have the same layout. typedef struct _mp_obj_socket_t { mp_obj_base_t base; int fd; bool blocking; } mp_obj_socket_t; const mp_obj_type_t mp_type_socket; // Helper functions static inline mp_obj_t mp_obj_from_sockaddr(const struct sockaddr *addr, socklen_t len) { return mp_obj_new_bytes((const byte *)addr, len); } STATIC mp_obj_socket_t *socket_new(int fd) { mp_obj_socket_t *o = m_new_obj(mp_obj_socket_t); o->base.type = &mp_type_socket; o->fd = fd; o->blocking = true; return o; } STATIC void socket_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { (void)kind; mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in); mp_printf(print, "<_socket %d>", self->fd); } STATIC mp_uint_t socket_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) { mp_obj_socket_t *o = MP_OBJ_TO_PTR(o_in); ssize_t r; MP_HAL_RETRY_SYSCALL(r, read(o->fd, buf, size), { // On blocking socket, we get EAGAIN in case SO_RCVTIMEO/SO_SNDTIMEO // timed out, and need to convert that to ETIMEDOUT. if (err == EAGAIN && o->blocking) { err = MP_ETIMEDOUT; } *errcode = err; return MP_STREAM_ERROR; }); return (mp_uint_t)r; } STATIC mp_uint_t socket_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) { mp_obj_socket_t *o = MP_OBJ_TO_PTR(o_in); ssize_t r; MP_HAL_RETRY_SYSCALL(r, write(o->fd, buf, size), { // On blocking socket, we get EAGAIN in case SO_RCVTIMEO/SO_SNDTIMEO // timed out, and need to convert that to ETIMEDOUT. if (err == EAGAIN && o->blocking) { err = MP_ETIMEDOUT; } *errcode = err; return MP_STREAM_ERROR; }); return (mp_uint_t)r; } STATIC mp_uint_t socket_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_t arg, int *errcode) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(o_in); (void)arg; switch (request) { case MP_STREAM_CLOSE: // There's a POSIX drama regarding return value of close in general, // and EINTR error in particular. See e.g. // http://lwn.net/Articles/576478/ // http://austingroupbugs.net/view.php?id=529 // The rationale MicroPython follows is that close() just releases // file descriptor. If you're interested to catch I/O errors before // closing fd, fsync() it. MP_THREAD_GIL_EXIT(); close(self->fd); MP_THREAD_GIL_ENTER(); return 0; case MP_STREAM_GET_FILENO: return self->fd; #if MICROPY_PY_USELECT case MP_STREAM_POLL: { mp_uint_t ret = 0; uint8_t pollevents = 0; if (arg & MP_STREAM_POLL_RD) { pollevents |= POLLIN; } if (arg & MP_STREAM_POLL_WR) { pollevents |= POLLOUT; } struct pollfd pfd = { .fd = self->fd, .events = pollevents }; if (poll(&pfd, 1, 0) > 0) { if (pfd.revents & POLLIN) { ret |= MP_STREAM_POLL_RD; } if (pfd.revents & POLLOUT) { ret |= MP_STREAM_POLL_WR; } } return ret; } #endif default: *errcode = MP_EINVAL; return MP_STREAM_ERROR; } } STATIC mp_obj_t socket_fileno(mp_obj_t self_in) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in); return MP_OBJ_NEW_SMALL_INT(self->fd); } STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_fileno_obj, socket_fileno); STATIC mp_obj_t socket_connect(mp_obj_t self_in, mp_obj_t addr_in) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in); mp_buffer_info_t bufinfo; mp_get_buffer_raise(addr_in, &bufinfo, MP_BUFFER_READ); // special case of PEP 475 to retry only if blocking so we can't use // MP_HAL_RETRY_SYSCALL() here for (;;) { MP_THREAD_GIL_EXIT(); int r = connect(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len); MP_THREAD_GIL_ENTER(); if (r == -1) { int err = errno; if (self->blocking) { if (err == EINTR) { mp_handle_pending(true); continue; } // EINPROGRESS on a blocking socket means the operation timed out if (err == EINPROGRESS) { err = MP_ETIMEDOUT; } } mp_raise_OSError(err); } return mp_const_none; } } STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_connect_obj, socket_connect); STATIC mp_obj_t socket_bind(mp_obj_t self_in, mp_obj_t addr_in) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in); mp_buffer_info_t bufinfo; mp_get_buffer_raise(addr_in, &bufinfo, MP_BUFFER_READ); MP_THREAD_GIL_EXIT(); int r = bind(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len); MP_THREAD_GIL_ENTER(); RAISE_ERRNO(r, errno); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind); // method socket.listen([backlog]) STATIC mp_obj_t socket_listen(size_t n_args, const mp_obj_t *args) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]); int backlog = MICROPY_PY_USOCKET_LISTEN_BACKLOG_DEFAULT; if (n_args > 1) { backlog = (int)mp_obj_get_int(args[1]); backlog = (backlog < 0) ? 0 : backlog; } MP_THREAD_GIL_EXIT(); int r = listen(self->fd, backlog); MP_THREAD_GIL_ENTER(); RAISE_ERRNO(r, errno); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_listen_obj, 1, 2, socket_listen); STATIC mp_obj_t socket_accept(mp_obj_t self_in) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in); // sockaddr_storage isn't stack-friendly (129 bytes or so) // struct sockaddr_storage addr; byte addr[32]; socklen_t addr_len = sizeof(addr); int fd; MP_HAL_RETRY_SYSCALL(fd, accept(self->fd, (struct sockaddr *)&addr, &addr_len), { // EAGAIN on a blocking socket means the operation timed out if (self->blocking && err == EAGAIN) { err = MP_ETIMEDOUT; } mp_raise_OSError(err); }); mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL)); t->items[0] = MP_OBJ_FROM_PTR(socket_new(fd)); t->items[1] = mp_obj_new_bytearray(addr_len, &addr); return MP_OBJ_FROM_PTR(t); } STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_accept_obj, socket_accept); // Note: besides flag param, this differs from read() in that // this does not swallow blocking errors (EAGAIN, EWOULDBLOCK) - // these would be thrown as exceptions. STATIC mp_obj_t socket_recv(size_t n_args, const mp_obj_t *args) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]); int sz = MP_OBJ_SMALL_INT_VALUE(args[1]); int flags = 0; if (n_args > 2) { flags = MP_OBJ_SMALL_INT_VALUE(args[2]); } byte *buf = m_new(byte, sz); ssize_t out_sz; MP_HAL_RETRY_SYSCALL(out_sz, recv(self->fd, buf, sz, flags), mp_raise_OSError(err)); mp_obj_t ret = mp_obj_new_str_of_type(&mp_type_bytes, buf, out_sz); m_del(char, buf, sz); return ret; } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_recv_obj, 2, 3, socket_recv); STATIC mp_obj_t socket_recvfrom(size_t n_args, const mp_obj_t *args) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]); int sz = MP_OBJ_SMALL_INT_VALUE(args[1]); int flags = 0; if (n_args > 2) { flags = MP_OBJ_SMALL_INT_VALUE(args[2]); } struct sockaddr_storage addr; socklen_t addr_len = sizeof(addr); byte *buf = m_new(byte, sz); ssize_t out_sz; MP_HAL_RETRY_SYSCALL(out_sz, recvfrom(self->fd, buf, sz, flags, (struct sockaddr *)&addr, &addr_len), mp_raise_OSError(err)); mp_obj_t buf_o = mp_obj_new_str_of_type(&mp_type_bytes, buf, out_sz); m_del(char, buf, sz); mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL)); t->items[0] = buf_o; t->items[1] = mp_obj_from_sockaddr((struct sockaddr *)&addr, addr_len); return MP_OBJ_FROM_PTR(t); } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_recvfrom_obj, 2, 3, socket_recvfrom); // Note: besides flag param, this differs from write() in that // this does not swallow blocking errors (EAGAIN, EWOULDBLOCK) - // these would be thrown as exceptions. STATIC mp_obj_t socket_send(size_t n_args, const mp_obj_t *args) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]); int flags = 0; if (n_args > 2) { flags = MP_OBJ_SMALL_INT_VALUE(args[2]); } mp_buffer_info_t bufinfo; mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_READ); ssize_t out_sz; MP_HAL_RETRY_SYSCALL(out_sz, send(self->fd, bufinfo.buf, bufinfo.len, flags), mp_raise_OSError(err)); return MP_OBJ_NEW_SMALL_INT(out_sz); } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_send_obj, 2, 3, socket_send); STATIC mp_obj_t socket_sendto(size_t n_args, const mp_obj_t *args) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]); int flags = 0; mp_obj_t dst_addr = args[2]; if (n_args > 3) { flags = MP_OBJ_SMALL_INT_VALUE(args[2]); dst_addr = args[3]; } mp_buffer_info_t bufinfo, addr_bi; mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_READ); mp_get_buffer_raise(dst_addr, &addr_bi, MP_BUFFER_READ); ssize_t out_sz; MP_HAL_RETRY_SYSCALL(out_sz, sendto(self->fd, bufinfo.buf, bufinfo.len, flags, (struct sockaddr *)addr_bi.buf, addr_bi.len), mp_raise_OSError(err)); return MP_OBJ_NEW_SMALL_INT(out_sz); } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_sendto_obj, 3, 4, socket_sendto); STATIC mp_obj_t socket_setsockopt(size_t n_args, const mp_obj_t *args) { (void)n_args; // always 4 mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]); int level = MP_OBJ_SMALL_INT_VALUE(args[1]); int option = mp_obj_get_int(args[2]); const void *optval; socklen_t optlen; int val; if (mp_obj_is_int(args[3])) { val = mp_obj_int_get_truncated(args[3]); optval = &val; optlen = sizeof(val); } else { mp_buffer_info_t bufinfo; mp_get_buffer_raise(args[3], &bufinfo, MP_BUFFER_READ); optval = bufinfo.buf; optlen = bufinfo.len; } MP_THREAD_GIL_EXIT(); int r = setsockopt(self->fd, level, option, optval, optlen); MP_THREAD_GIL_ENTER(); RAISE_ERRNO(r, errno); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_setsockopt_obj, 4, 4, socket_setsockopt); STATIC mp_obj_t socket_setblocking(mp_obj_t self_in, mp_obj_t flag_in) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in); int val = mp_obj_is_true(flag_in); MP_THREAD_GIL_EXIT(); int flags = fcntl(self->fd, F_GETFL, 0); if (flags == -1) { MP_THREAD_GIL_ENTER(); RAISE_ERRNO(flags, errno); } if (val) { flags &= ~O_NONBLOCK; } else { flags |= O_NONBLOCK; } flags = fcntl(self->fd, F_SETFL, flags); MP_THREAD_GIL_ENTER(); RAISE_ERRNO(flags, errno); self->blocking = val; return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_setblocking_obj, socket_setblocking); STATIC mp_obj_t socket_settimeout(mp_obj_t self_in, mp_obj_t timeout_in) { mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in); struct timeval tv = {0,}; bool new_blocking = true; // Timeout of None means no timeout, which in POSIX is signified with 0 timeout, // and that's how 'tv' is initialized above if (timeout_in != mp_const_none) { #if MICROPY_PY_BUILTINS_FLOAT mp_float_t val = mp_obj_get_float(timeout_in); mp_float_t ipart; tv.tv_usec = (time_t)MICROPY_FLOAT_C_FUN(round)(MICROPY_FLOAT_C_FUN(modf)(val, &ipart) * MICROPY_FLOAT_CONST(1000000.)); tv.tv_sec = (suseconds_t)ipart; #else tv.tv_sec = mp_obj_get_int(timeout_in); #endif // For SO_RCVTIMEO/SO_SNDTIMEO, zero timeout means infinity, but // for Python API it means non-blocking. if (tv.tv_sec == 0 && tv.tv_usec == 0) { new_blocking = false; } } if (new_blocking) { int r; MP_THREAD_GIL_EXIT(); r = setsockopt(self->fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(struct timeval)); if (r == -1) { MP_THREAD_GIL_ENTER(); RAISE_ERRNO(r, errno); } r = setsockopt(self->fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(struct timeval)); MP_THREAD_GIL_ENTER(); RAISE_ERRNO(r, errno); } if (self->blocking != new_blocking) { socket_setblocking(self_in, mp_obj_new_bool(new_blocking)); } return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_settimeout_obj, socket_settimeout); STATIC mp_obj_t socket_makefile(size_t n_args, const mp_obj_t *args) { // TODO: CPython explicitly says that closing returned object doesn't close // the original socket (Python2 at all says that fd is dup()ed). But we // save on the bloat. mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]); mp_obj_t *new_args = alloca(n_args * sizeof(mp_obj_t)); memcpy(new_args + 1, args + 1, (n_args - 1) * sizeof(mp_obj_t)); new_args[0] = MP_OBJ_NEW_SMALL_INT(self->fd); return mp_vfs_open(n_args, new_args, (mp_map_t *)&mp_const_empty_map); } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_makefile_obj, 1, 3, socket_makefile); STATIC mp_obj_t socket_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) { (void)type_in; (void)n_kw; int family = AF_INET; int type = SOCK_STREAM; int proto = 0; if (n_args > 0) { assert(mp_obj_is_small_int(args[0])); family = MP_OBJ_SMALL_INT_VALUE(args[0]); if (n_args > 1) { assert(mp_obj_is_small_int(args[1])); type = MP_OBJ_SMALL_INT_VALUE(args[1]); if (n_args > 2) { assert(mp_obj_is_small_int(args[2])); proto = MP_OBJ_SMALL_INT_VALUE(args[2]); } } } MP_THREAD_GIL_EXIT(); int fd = socket(family, type, proto); MP_THREAD_GIL_ENTER(); RAISE_ERRNO(fd, errno); return MP_OBJ_FROM_PTR(socket_new(fd)); } STATIC const mp_rom_map_elem_t usocket_locals_dict_table[] = { { MP_ROM_QSTR(MP_QSTR_fileno), MP_ROM_PTR(&socket_fileno_obj) }, { MP_ROM_QSTR(MP_QSTR_makefile), MP_ROM_PTR(&socket_makefile_obj) }, { MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) }, { MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) }, { MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) }, { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) }, { MP_ROM_QSTR(MP_QSTR_connect), MP_ROM_PTR(&socket_connect_obj) }, { MP_ROM_QSTR(MP_QSTR_bind), MP_ROM_PTR(&socket_bind_obj) }, { MP_ROM_QSTR(MP_QSTR_listen), MP_ROM_PTR(&socket_listen_obj) }, { MP_ROM_QSTR(MP_QSTR_accept), MP_ROM_PTR(&socket_accept_obj) }, { MP_ROM_QSTR(MP_QSTR_recv), MP_ROM_PTR(&socket_recv_obj) }, { MP_ROM_QSTR(MP_QSTR_recvfrom), MP_ROM_PTR(&socket_recvfrom_obj) }, { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&socket_send_obj) }, { MP_ROM_QSTR(MP_QSTR_sendto), MP_ROM_PTR(&socket_sendto_obj) }, { MP_ROM_QSTR(MP_QSTR_setsockopt), MP_ROM_PTR(&socket_setsockopt_obj) }, { MP_ROM_QSTR(MP_QSTR_setblocking), MP_ROM_PTR(&socket_setblocking_obj) }, { MP_ROM_QSTR(MP_QSTR_settimeout), MP_ROM_PTR(&socket_settimeout_obj) }, { MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) }, }; STATIC MP_DEFINE_CONST_DICT(usocket_locals_dict, usocket_locals_dict_table); STATIC const mp_stream_p_t usocket_stream_p = { .read = socket_read, .write = socket_write, .ioctl = socket_ioctl, }; const mp_obj_type_t mp_type_socket = { { &mp_type_type }, .name = MP_QSTR_socket, .print = socket_print, .make_new = socket_make_new, .getiter = NULL, .iternext = NULL, .protocol = &usocket_stream_p, .locals_dict = (mp_obj_dict_t *)&usocket_locals_dict, }; #define BINADDR_MAX_LEN sizeof(struct in6_addr) STATIC mp_obj_t mod_socket_inet_pton(mp_obj_t family_in, mp_obj_t addr_in) { int family = mp_obj_get_int(family_in); byte binaddr[BINADDR_MAX_LEN]; int r = inet_pton(family, mp_obj_str_get_str(addr_in), binaddr); RAISE_ERRNO(r, errno); if (r == 0) { mp_raise_OSError(MP_EINVAL); } int binaddr_len = 0; switch (family) { case AF_INET: binaddr_len = sizeof(struct in_addr); break; case AF_INET6: binaddr_len = sizeof(struct in6_addr); break; } return mp_obj_new_bytes(binaddr, binaddr_len); } STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_socket_inet_pton_obj, mod_socket_inet_pton); STATIC mp_obj_t mod_socket_inet_ntop(mp_obj_t family_in, mp_obj_t binaddr_in) { int family = mp_obj_get_int(family_in); mp_buffer_info_t bufinfo; mp_get_buffer_raise(binaddr_in, &bufinfo, MP_BUFFER_READ); vstr_t vstr; vstr_init_len(&vstr, family == AF_INET ? INET_ADDRSTRLEN : INET6_ADDRSTRLEN); if (inet_ntop(family, bufinfo.buf, vstr.buf, vstr.len) == NULL) { mp_raise_OSError(errno); } vstr.len = strlen(vstr.buf); return mp_obj_new_str_from_vstr(&mp_type_str, &vstr); } STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_socket_inet_ntop_obj, mod_socket_inet_ntop); STATIC mp_obj_t mod_socket_getaddrinfo(size_t n_args, const mp_obj_t *args) { // TODO: Implement 5th and 6th args const char *host = mp_obj_str_get_str(args[0]); const char *serv = NULL; struct addrinfo hints; char buf[6]; memset(&hints, 0, sizeof(hints)); // getaddrinfo accepts port in string notation, so however // it may seem stupid, we need to convert int to str if (mp_obj_is_small_int(args[1])) { unsigned port = (unsigned short)MP_OBJ_SMALL_INT_VALUE(args[1]); snprintf(buf, sizeof(buf), "%u", port); serv = buf; hints.ai_flags = AI_NUMERICSERV; #ifdef __UCLIBC_MAJOR__ #if __UCLIBC_MAJOR__ == 0 && (__UCLIBC_MINOR__ < 9 || (__UCLIBC_MINOR__ == 9 && __UCLIBC_SUBLEVEL__ <= 32)) // "warning" requires -Wno-cpp which is a relatively new gcc option, so we choose not to use it. // #warning Working around uClibc bug with numeric service name // Older versions og uClibc have bugs when numeric ports in service // arg require also hints.ai_socktype (or hints.ai_protocol) != 0 // This actually was fixed in 0.9.32.1, but uClibc doesn't allow to // test for that. // http://git.uclibc.org/uClibc/commit/libc/inet/getaddrinfo.c?id=bc3be18145e4d5 // Note that this is crude workaround, precluding UDP socket addresses // to be returned. TODO: set only if not set by Python args. hints.ai_socktype = SOCK_STREAM; #endif #endif } else { serv = mp_obj_str_get_str(args[1]); } if (n_args > 2) { hints.ai_family = MP_OBJ_SMALL_INT_VALUE(args[2]); if (n_args > 3) { hints.ai_socktype = MP_OBJ_SMALL_INT_VALUE(args[3]); } } struct addrinfo *addr_list; MP_THREAD_GIL_EXIT(); int res = getaddrinfo(host, serv, &hints, &addr_list); MP_THREAD_GIL_ENTER(); if (res != 0) { // CPython: socket.gaierror mp_raise_msg_varg(&mp_type_OSError, MP_ERROR_TEXT("[addrinfo error %d]"), res); } assert(addr_list); mp_obj_t list = mp_obj_new_list(0, NULL); for (struct addrinfo *addr = addr_list; addr; addr = addr->ai_next) { mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(5, NULL)); t->items[0] = MP_OBJ_NEW_SMALL_INT(addr->ai_family); t->items[1] = MP_OBJ_NEW_SMALL_INT(addr->ai_socktype); t->items[2] = MP_OBJ_NEW_SMALL_INT(addr->ai_protocol); // "canonname will be a string representing the canonical name of the host // if AI_CANONNAME is part of the flags argument; else canonname will be empty." ?? if (addr->ai_canonname) { t->items[3] = MP_OBJ_NEW_QSTR(qstr_from_str(addr->ai_canonname)); } else { t->items[3] = mp_const_none; } t->items[4] = mp_obj_new_bytearray(addr->ai_addrlen, addr->ai_addr); mp_obj_list_append(list, MP_OBJ_FROM_PTR(t)); } freeaddrinfo(addr_list); return list; } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_socket_getaddrinfo_obj, 2, 4, mod_socket_getaddrinfo); STATIC mp_obj_t mod_socket_sockaddr(mp_obj_t sockaddr_in) { mp_buffer_info_t bufinfo; mp_get_buffer_raise(sockaddr_in, &bufinfo, MP_BUFFER_READ); switch (((struct sockaddr *)bufinfo.buf)->sa_family) { case AF_INET: { struct sockaddr_in *sa = (struct sockaddr_in *)bufinfo.buf; mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL)); t->items[0] = MP_OBJ_NEW_SMALL_INT(AF_INET); t->items[1] = mp_obj_new_bytes((byte *)&sa->sin_addr, sizeof(sa->sin_addr)); t->items[2] = MP_OBJ_NEW_SMALL_INT(ntohs(sa->sin_port)); return MP_OBJ_FROM_PTR(t); } case AF_INET6: { struct sockaddr_in6 *sa = (struct sockaddr_in6 *)bufinfo.buf; mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(5, NULL)); t->items[0] = MP_OBJ_NEW_SMALL_INT(AF_INET6); t->items[1] = mp_obj_new_bytes((byte *)&sa->sin6_addr, sizeof(sa->sin6_addr)); t->items[2] = MP_OBJ_NEW_SMALL_INT(ntohs(sa->sin6_port)); t->items[3] = MP_OBJ_NEW_SMALL_INT(ntohl(sa->sin6_flowinfo)); t->items[4] = MP_OBJ_NEW_SMALL_INT(ntohl(sa->sin6_scope_id)); return MP_OBJ_FROM_PTR(t); } default: { struct sockaddr *sa = (struct sockaddr *)bufinfo.buf; mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL)); t->items[0] = MP_OBJ_NEW_SMALL_INT(sa->sa_family); t->items[1] = mp_obj_new_bytes((byte *)sa->sa_data, bufinfo.len - offsetof(struct sockaddr, sa_data)); return MP_OBJ_FROM_PTR(t); } } return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_sockaddr_obj, mod_socket_sockaddr); STATIC const mp_rom_map_elem_t mp_module_socket_globals_table[] = { { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_usocket) }, { MP_ROM_QSTR(MP_QSTR_socket), MP_ROM_PTR(&mp_type_socket) }, { MP_ROM_QSTR(MP_QSTR_getaddrinfo), MP_ROM_PTR(&mod_socket_getaddrinfo_obj) }, { MP_ROM_QSTR(MP_QSTR_inet_pton), MP_ROM_PTR(&mod_socket_inet_pton_obj) }, { MP_ROM_QSTR(MP_QSTR_inet_ntop), MP_ROM_PTR(&mod_socket_inet_ntop_obj) }, { MP_ROM_QSTR(MP_QSTR_sockaddr), MP_ROM_PTR(&mod_socket_sockaddr_obj) }, #define C(name) { MP_ROM_QSTR(MP_QSTR_##name), MP_ROM_INT(name) } C(AF_UNIX), C(AF_INET), C(AF_INET6), C(SOCK_STREAM), C(SOCK_DGRAM), C(SOCK_RAW), C(MSG_DONTROUTE), C(MSG_DONTWAIT), C(SOL_SOCKET), C(SO_BROADCAST), C(SO_ERROR), C(SO_KEEPALIVE), C(SO_LINGER), C(SO_REUSEADDR), #undef C }; STATIC MP_DEFINE_CONST_DICT(mp_module_socket_globals, mp_module_socket_globals_table); const mp_obj_module_t mp_module_socket = { .base = { &mp_type_module }, .globals = (mp_obj_dict_t *)&mp_module_socket_globals, };