Add lean ("raw") socket module.
This commit is contained in:
Paul Sokolovsky
parent
aefe79880f
commit
fc92608237
@ -25,6 +25,7 @@ endif
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SRC_C = \
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main.c \
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file.c \
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socket.c \
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OBJ = $(addprefix $(BUILD)/, $(SRC_C:.c=.o)) $(PY_O)
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LIB = -lreadline
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@ -21,6 +21,7 @@
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#endif
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extern const mp_obj_fun_native_t mp_builtin_open_obj;
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void rawsocket_init();
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static void execute_from_lexer(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, bool is_repl) {
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if (lex == NULL) {
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@ -215,6 +216,7 @@ int main(int argc, char **argv) {
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rt_store_name(qstr_from_str_static("test"), test_obj_new(42));
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rt_store_name(qstr_from_str_static("open"), (mp_obj_t)&mp_builtin_open_obj);
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rawsocket_init();
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// Here is some example code to create a class and instance of that class.
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// First is the Python, then the C code.
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284
unix/socket.c
Normal file
284
unix/socket.c
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@ -0,0 +1,284 @@
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#include <stdio.h>
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#include <assert.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <errno.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "mpqstr.h"
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#include "obj.h"
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#include "objtuple.h"
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#include "objarray.h"
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#include "runtime.h"
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#include "stream.h"
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#define MICROPY_SOCKET_EXTRA (0)
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typedef struct _mp_obj_socket_t {
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mp_obj_base_t base;
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int fd;
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} mp_obj_socket_t;
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static const mp_obj_type_t rawsocket_type;
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// Helper functions
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#define RAISE_ERRNO(err_flag, error_val) \
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{ if (err_flag == -1) \
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{ nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_OSError, "[Errno %d]", error_val)); } }
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static void get_buffer(mp_obj_t obj, buffer_info_t *bufinfo) {
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mp_obj_base_t *o = (mp_obj_base_t *)obj;
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if (o->type->buffer_p.get_buffer == NULL) {
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goto error;
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}
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o->type->buffer_p.get_buffer(o, bufinfo, BUFFER_READ);
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if (bufinfo->buf == NULL) {
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goto error;
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}
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return;
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error:
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nlr_jump(mp_obj_new_exception_msg(MP_QSTR_TypeError, "Operation not supported"));
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}
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static mp_obj_socket_t *socket_new(int fd) {
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mp_obj_socket_t *o = m_new_obj(mp_obj_socket_t);
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o->base.type = &rawsocket_type;
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o->fd = fd;
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return o;
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}
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static void socket_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_obj_socket_t *self = self_in;
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print(env, "<_socket %d>", self->fd);
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}
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static machine_int_t socket_read(mp_obj_t o_in, void *buf, machine_uint_t size, int *errcode) {
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mp_obj_socket_t *o = o_in;
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machine_int_t r = read(o->fd, buf, size);
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if (r == -1) {
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*errcode = errno;
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}
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return r;
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}
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static machine_int_t socket_write(mp_obj_t o_in, const void *buf, machine_uint_t size, int *errcode) {
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mp_obj_socket_t *o = o_in;
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machine_int_t r = write(o->fd, buf, size);
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if (r == -1) {
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*errcode = errno;
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}
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return r;
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}
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static mp_obj_t socket_close(mp_obj_t self_in) {
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mp_obj_socket_t *self = self_in;
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close(self->fd);
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(socket_close_obj, socket_close);
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static mp_obj_t socket_connect(mp_obj_t self_in, mp_obj_t addr_in) {
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mp_obj_socket_t *self = self_in;
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buffer_info_t bufinfo;
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get_buffer(addr_in, &bufinfo);
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int r = connect(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);
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RAISE_ERRNO(r, errno);
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_2(socket_connect_obj, socket_connect);
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static mp_obj_t socket_bind(mp_obj_t self_in, mp_obj_t addr_in) {
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mp_obj_socket_t *self = self_in;
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buffer_info_t bufinfo;
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get_buffer(addr_in, &bufinfo);
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int r = bind(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);
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RAISE_ERRNO(r, errno);
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind);
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static mp_obj_t socket_listen(mp_obj_t self_in, mp_obj_t backlog_in) {
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mp_obj_socket_t *self = self_in;
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int r = listen(self->fd, MP_OBJ_SMALL_INT_VALUE(backlog_in));
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RAISE_ERRNO(r, errno);
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_2(socket_listen_obj, socket_listen);
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static mp_obj_t socket_accept(mp_obj_t self_in) {
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mp_obj_socket_t *self = self_in;
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struct sockaddr addr;
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socklen_t addr_len = sizeof(addr);
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int fd = accept(self->fd, &addr, &addr_len);
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RAISE_ERRNO(fd, errno);
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mp_obj_tuple_t *t = mp_obj_new_tuple(2, NULL);
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t->items[0] = socket_new(fd);
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t->items[1] = mp_obj_new_bytearray(addr_len, &addr);
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return t;
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(socket_accept_obj, socket_accept);
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static mp_obj_t socket_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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int family = AF_INET;
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int type = SOCK_STREAM;
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int proto = 0;
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if (n_args > 0) {
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assert(MP_OBJ_IS_SMALL_INT(args[0]));
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family = MP_OBJ_SMALL_INT_VALUE(args[0]);
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if (n_args > 1) {
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assert(MP_OBJ_IS_SMALL_INT(args[1]));
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type = MP_OBJ_SMALL_INT_VALUE(args[1]);
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if (n_args > 2) {
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assert(MP_OBJ_IS_SMALL_INT(args[2]));
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proto = MP_OBJ_SMALL_INT_VALUE(args[2]);
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}
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}
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}
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int fd = socket(family, type, proto);
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RAISE_ERRNO(fd, errno);
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return socket_new(fd);
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}
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static const mp_method_t rawsocket_type_methods[] = {
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{ "read", &mp_stream_read_obj },
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{ "readall", &mp_stream_readall_obj },
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{ "readline", &mp_stream_unbuffered_readline_obj},
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{ "write", &mp_stream_write_obj },
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{ "connect", &socket_connect_obj },
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{ "bind", &socket_bind_obj },
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{ "listen", &socket_listen_obj },
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{ "accept", &socket_accept_obj },
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{ "close", &socket_close_obj },
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#if MICROPY_SOCKET_EXTRA
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{ "recv", &mp_stream_read_obj },
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{ "send", &mp_stream_write_obj },
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#endif
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{ NULL, NULL },
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};
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static const mp_obj_type_t rawsocket_type = {
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{ &mp_const_type },
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"socket",
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.print = socket_print,
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.make_new = socket_make_new,
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.getiter = NULL,
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.iternext = NULL,
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.stream_p = {
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.read = socket_read,
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.write = socket_write,
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},
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.methods = rawsocket_type_methods,
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};
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static mp_obj_t mod_socket_htons(mp_obj_t arg) {
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return MP_OBJ_NEW_SMALL_INT(htons(MP_OBJ_SMALL_INT_VALUE(arg)));
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_htons_obj, mod_socket_htons);
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static mp_obj_t mod_socket_inet_aton(mp_obj_t arg) {
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assert(MP_OBJ_IS_TYPE(arg, &str_type));
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const char *s = qstr_str(mp_obj_str_get(arg));
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struct in_addr addr;
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if (!inet_aton(s, &addr)) {
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nlr_jump(mp_obj_new_exception_msg(MP_QSTR_OSError, "Invalid IP address"));
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}
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return mp_obj_new_int(addr.s_addr);
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_inet_aton_obj, mod_socket_inet_aton);
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#if MICROPY_SOCKET_EXTRA
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static mp_obj_t mod_socket_gethostbyname(mp_obj_t arg) {
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assert(MP_OBJ_IS_TYPE(arg, &str_type));
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const char *s = qstr_str(mp_obj_str_get(arg));
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struct hostent *h = gethostbyname(s);
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if (h == NULL) {
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nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_OSError, "[Errno %d]", errno));
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}
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assert(h->h_length == 4);
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return mp_obj_new_int(*(int*)*h->h_addr_list);
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_gethostbyname_obj, mod_socket_gethostbyname);
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#endif
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static mp_obj_t mod_socket_getaddrinfo(int n_args, const mp_obj_t *args) {
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// TODO: Implement all args
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assert(n_args == 2);
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assert(MP_OBJ_IS_TYPE(args[0], &str_type));
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const char *host = qstr_str(mp_obj_str_get(args[0]));
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const char *serv = NULL;
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// getaddrinfo accepts port in string notation, so however
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// it may seem stupid, we need to convert int to str
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if (MP_OBJ_IS_SMALL_INT(args[1])) {
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int port = MP_OBJ_SMALL_INT_VALUE(args[1]);
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static char buf[20];
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sprintf(buf, "%d", port);
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serv = buf;
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} else {
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serv = qstr_str(mp_obj_str_get(args[1]));
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}
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struct addrinfo hints;
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struct addrinfo *addr;
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memset(&hints, 0, sizeof(hints));
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int res = getaddrinfo(host, serv, NULL/*&hints*/, &addr);
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if (res != 0) {
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nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_OSError, "[addrinfo error %d]", res));
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}
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assert(addr);
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mp_obj_t list = rt_build_list(0, NULL);
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for (; addr; addr = addr->ai_next) {
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mp_obj_tuple_t *t = mp_obj_new_tuple(5, NULL);
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t->items[0] = MP_OBJ_NEW_SMALL_INT(addr->ai_family);
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t->items[1] = MP_OBJ_NEW_SMALL_INT(addr->ai_socktype);
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t->items[2] = MP_OBJ_NEW_SMALL_INT(addr->ai_protocol);
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// "canonname will be a string representing the canonical name of the host
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// if AI_CANONNAME is part of the flags argument; else canonname will be empty." ??
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if (addr->ai_canonname) {
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t->items[3] = MP_OBJ_NEW_QSTR(qstr_from_strn_copy(addr->ai_canonname, strlen(addr->ai_canonname)));
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} else {
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t->items[3] = mp_const_none;
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}
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t->items[4] = mp_obj_new_bytearray(addr->ai_addrlen, addr->ai_addr);
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rt_list_append(list, t);
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}
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return list;
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}
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static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_socket_getaddrinfo_obj, 2, 6, mod_socket_getaddrinfo);
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extern mp_obj_type_t sockaddr_in_type;
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#define STORE_INT_CONST(m, name) rt_store_attr(m, qstr_from_str_static(#name), MP_OBJ_NEW_SMALL_INT(name))
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void socket_init() {
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mp_obj_t m = mp_obj_new_module(qstr_from_str_static("rawsocket"));
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rt_store_attr(m, qstr_from_str_static("socket"), (mp_obj_t)&rawsocket_type);
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#if MICROPY_SOCKET_EXTRA
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rt_store_attr(m, qstr_from_str_static("sockaddr_in"), (mp_obj_t)&sockaddr_in_type);
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rt_store_attr(m, qstr_from_str_static("htons"), (mp_obj_t)&mod_socket_htons_obj);
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rt_store_attr(m, qstr_from_str_static("inet_aton"), (mp_obj_t)&mod_socket_inet_aton_obj);
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rt_store_attr(m, qstr_from_str_static("gethostbyname"), (mp_obj_t)&mod_socket_gethostbyname_obj);
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#endif
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rt_store_attr(m, qstr_from_str_static("getaddrinfo"), (mp_obj_t)&mod_socket_getaddrinfo_obj);
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STORE_INT_CONST(m, AF_UNIX);
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STORE_INT_CONST(m, AF_INET);
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STORE_INT_CONST(m, AF_INET6);
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STORE_INT_CONST(m, SOCK_STREAM);
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STORE_INT_CONST(m, SOCK_DGRAM);
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STORE_INT_CONST(m, SOCK_RAW);
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rt_store_name(qstr_from_str_static("rawsocket"), m);
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}
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