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Merge pull request #194 from pfalcon/socket

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Add lean ("raw") socket module.
This commit is contained in:
Damien George 2014-01-18 15:34:30 -08:00
commit 8fce5b42a2
3 changed files with 287 additions and 0 deletions
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1
unix/Makefile
View File

@ -25,6 +25,7 @@ endif
SRC_C = \
main.c \
file.c \
socket.c \
OBJ = $(addprefix $(BUILD)/, $(SRC_C:.c=.o)) $(PY_O)
LIB = -lreadline

2
unix/main.c
View File

@ -21,6 +21,7 @@
#endif
extern const mp_obj_fun_native_t mp_builtin_open_obj;
void rawsocket_init();
static void execute_from_lexer(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, bool is_repl) {
if (lex == NULL) {
@ -223,6 +224,7 @@ int main(int argc, char **argv) {
rt_store_name(qstr_from_str_static("test"), test_obj_new(42));
rt_store_name(qstr_from_str_static("open"), (mp_obj_t)&mp_builtin_open_obj);
rawsocket_init();
// Here is some example code to create a class and instance of that class.
// First is the Python, then the C code.

284
unix/socket.c Normal file
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@ -0,0 +1,284 @@
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "mpqstr.h"
#include "obj.h"
#include "objtuple.h"
#include "objarray.h"
#include "runtime.h"
#include "stream.h"
#define MICROPY_SOCKET_EXTRA (0)
typedef struct _mp_obj_socket_t {
mp_obj_base_t base;
int fd;
} mp_obj_socket_t;
static const mp_obj_type_t rawsocket_type;
// Helper functions
#define RAISE_ERRNO(err_flag, error_val) \
{ if (err_flag == -1) \
{ nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_OSError, "[Errno %d]", error_val)); } }
static void get_buffer(mp_obj_t obj, buffer_info_t *bufinfo) {
mp_obj_base_t *o = (mp_obj_base_t *)obj;
if (o->type->buffer_p.get_buffer == NULL) {
goto error;
}
o->type->buffer_p.get_buffer(o, bufinfo, BUFFER_READ);
if (bufinfo->buf == NULL) {
goto error;
}
return;
error:
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_TypeError, "Operation not supported"));
}
static mp_obj_socket_t *socket_new(int fd) {
mp_obj_socket_t *o = m_new_obj(mp_obj_socket_t);
o->base.type = &rawsocket_type;
o->fd = fd;
return o;
}
static void socket_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
mp_obj_socket_t *self = self_in;
print(env, "<_socket %d>", self->fd);
}
static machine_int_t socket_read(mp_obj_t o_in, void *buf, machine_uint_t size, int *errcode) {
mp_obj_socket_t *o = o_in;
machine_int_t r = read(o->fd, buf, size);
if (r == -1) {
*errcode = errno;
}
return r;
}
static machine_int_t socket_write(mp_obj_t o_in, const void *buf, machine_uint_t size, int *errcode) {
mp_obj_socket_t *o = o_in;
machine_int_t r = write(o->fd, buf, size);
if (r == -1) {
*errcode = errno;
}
return r;
}
static mp_obj_t socket_close(mp_obj_t self_in) {
mp_obj_socket_t *self = self_in;
close(self->fd);
return mp_const_none;
}
static MP_DEFINE_CONST_FUN_OBJ_1(socket_close_obj, socket_close);
static mp_obj_t socket_connect(mp_obj_t self_in, mp_obj_t addr_in) {
mp_obj_socket_t *self = self_in;
buffer_info_t bufinfo;
get_buffer(addr_in, &bufinfo);
int r = connect(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);
RAISE_ERRNO(r, errno);
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 = self_in;
buffer_info_t bufinfo;
get_buffer(addr_in, &bufinfo);
int r = bind(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);
RAISE_ERRNO(r, errno);
return mp_const_none;
}
static MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind);
static mp_obj_t socket_listen(mp_obj_t self_in, mp_obj_t backlog_in) {
mp_obj_socket_t *self = self_in;
int r = listen(self->fd, MP_OBJ_SMALL_INT_VALUE(backlog_in));
RAISE_ERRNO(r, errno);
return mp_const_none;
}
static MP_DEFINE_CONST_FUN_OBJ_2(socket_listen_obj, socket_listen);
static mp_obj_t socket_accept(mp_obj_t self_in) {
mp_obj_socket_t *self = self_in;
struct sockaddr addr;
socklen_t addr_len = sizeof(addr);
int fd = accept(self->fd, &addr, &addr_len);
RAISE_ERRNO(fd, errno);
mp_obj_tuple_t *t = mp_obj_new_tuple(2, NULL);
t->items[0] = socket_new(fd);
t->items[1] = mp_obj_new_bytearray(addr_len, &addr);
return t;
}
static MP_DEFINE_CONST_FUN_OBJ_1(socket_accept_obj, socket_accept);
static mp_obj_t socket_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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]);
}
}
}
int fd = socket(family, type, proto);
RAISE_ERRNO(fd, errno);
return socket_new(fd);
}
static const mp_method_t rawsocket_type_methods[] = {
{ "read", &mp_stream_read_obj },
{ "readall", &mp_stream_readall_obj },
{ "readline", &mp_stream_unbuffered_readline_obj},
{ "write", &mp_stream_write_obj },
{ "connect", &socket_connect_obj },
{ "bind", &socket_bind_obj },
{ "listen", &socket_listen_obj },
{ "accept", &socket_accept_obj },
{ "close", &socket_close_obj },
#if MICROPY_SOCKET_EXTRA
{ "recv", &mp_stream_read_obj },
{ "send", &mp_stream_write_obj },
#endif
{ NULL, NULL },
};
static const mp_obj_type_t rawsocket_type = {
{ &mp_const_type },
"socket",
.print = socket_print,
.make_new = socket_make_new,
.getiter = NULL,
.iternext = NULL,
.stream_p = {
.read = socket_read,
.write = socket_write,
},
.methods = rawsocket_type_methods,
};
static mp_obj_t mod_socket_htons(mp_obj_t arg) {
return MP_OBJ_NEW_SMALL_INT(htons(MP_OBJ_SMALL_INT_VALUE(arg)));
}
static MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_htons_obj, mod_socket_htons);
static mp_obj_t mod_socket_inet_aton(mp_obj_t arg) {
assert(MP_OBJ_IS_TYPE(arg, &str_type));
const char *s = qstr_str(mp_obj_str_get(arg));
struct in_addr addr;
if (!inet_aton(s, &addr)) {
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_OSError, "Invalid IP address"));
}
return mp_obj_new_int(addr.s_addr);
}
static MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_inet_aton_obj, mod_socket_inet_aton);
#if MICROPY_SOCKET_EXTRA
static mp_obj_t mod_socket_gethostbyname(mp_obj_t arg) {
assert(MP_OBJ_IS_TYPE(arg, &str_type));
const char *s = qstr_str(mp_obj_str_get(arg));
struct hostent *h = gethostbyname(s);
if (h == NULL) {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_OSError, "[Errno %d]", errno));
}
assert(h->h_length == 4);
return mp_obj_new_int(*(int*)*h->h_addr_list);
}
static MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_gethostbyname_obj, mod_socket_gethostbyname);
#endif
static mp_obj_t mod_socket_getaddrinfo(int n_args, const mp_obj_t *args) {
// TODO: Implement all args
assert(n_args == 2);
assert(MP_OBJ_IS_TYPE(args[0], &str_type));
const char *host = qstr_str(mp_obj_str_get(args[0]));
const char *serv = NULL;
// 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])) {
int port = MP_OBJ_SMALL_INT_VALUE(args[1]);
static char buf[20];
sprintf(buf, "%d", port);
serv = buf;
} else {
serv = qstr_str(mp_obj_str_get(args[1]));
}
struct addrinfo hints;
struct addrinfo *addr;
memset(&hints, 0, sizeof(hints));
int res = getaddrinfo(host, serv, NULL/*&hints*/, &addr);
if (res != 0) {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_OSError, "[addrinfo error %d]", res));
}
assert(addr);
mp_obj_t list = rt_build_list(0, NULL);
for (; addr; addr = addr->ai_next) {
mp_obj_tuple_t *t = 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_strn_copy(addr->ai_canonname, strlen(addr->ai_canonname)));
} else {
t->items[3] = mp_const_none;
}
t->items[4] = mp_obj_new_bytearray(addr->ai_addrlen, addr->ai_addr);
rt_list_append(list, t);
}
return list;
}
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_socket_getaddrinfo_obj, 2, 6, mod_socket_getaddrinfo);
extern mp_obj_type_t sockaddr_in_type;
#define STORE_INT_CONST(m, name) rt_store_attr(m, qstr_from_str_static(#name), MP_OBJ_NEW_SMALL_INT(name))
void socket_init() {
mp_obj_t m = mp_obj_new_module(qstr_from_str_static("rawsocket"));
rt_store_attr(m, qstr_from_str_static("socket"), (mp_obj_t)&rawsocket_type);
#if MICROPY_SOCKET_EXTRA
rt_store_attr(m, qstr_from_str_static("sockaddr_in"), (mp_obj_t)&sockaddr_in_type);
rt_store_attr(m, qstr_from_str_static("htons"), (mp_obj_t)&mod_socket_htons_obj);
rt_store_attr(m, qstr_from_str_static("inet_aton"), (mp_obj_t)&mod_socket_inet_aton_obj);
rt_store_attr(m, qstr_from_str_static("gethostbyname"), (mp_obj_t)&mod_socket_gethostbyname_obj);
#endif
rt_store_attr(m, qstr_from_str_static("getaddrinfo"), (mp_obj_t)&mod_socket_getaddrinfo_obj);
STORE_INT_CONST(m, AF_UNIX);
STORE_INT_CONST(m, AF_INET);
STORE_INT_CONST(m, AF_INET6);
STORE_INT_CONST(m, SOCK_STREAM);
STORE_INT_CONST(m, SOCK_DGRAM);
STORE_INT_CONST(m, SOCK_RAW);
rt_store_name(qstr_from_str_static("rawsocket"), m);
}