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extmod/modlwip: Implement setsockopt(IP_ADD_MEMBERSHIP).

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Allows to join multicast groups.
This commit is contained in:
Paul Sokolovsky 2017-07-31 22:38:37 +03:00
parent 55f33240f3
commit ee04525097
1 changed files with 29 additions and 3 deletions
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32
extmod/modlwip.c
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@ -45,6 +45,7 @@
//#include "lwip/raw.h"
#include "lwip/dns.h"
#include "lwip/tcp_impl.h"
#include "lwip/igmp.h"
#if 0 // print debugging info
#define DEBUG_printf DEBUG_printf
@ -52,6 +53,10 @@
#define DEBUG_printf(...) (void)0
#endif
// All socket options should be globally distinct,
// because we ignore option levels for efficiency.
#define IP_ADD_MEMBERSHIP 0x400
// For compatibilily with older lwIP versions.
#ifndef ip_set_option
#define ip_set_option(pcb, opt) ((pcb)->so_options |= (opt))
@ -1079,10 +1084,10 @@ STATIC mp_obj_t lwip_socket_setsockopt(mp_uint_t n_args, const mp_obj_t *args) {
return mp_const_none;
}
// Integer options
mp_int_t val = mp_obj_get_int(args[3]);
switch (opt) {
case SOF_REUSEADDR:
// level: SOL_SOCKET
case SOF_REUSEADDR: {
mp_int_t val = mp_obj_get_int(args[3]);
// Options are common for UDP and TCP pcb's.
if (val) {
ip_set_option(socket->pcb.tcp, SOF_REUSEADDR);
@ -1090,6 +1095,24 @@ STATIC mp_obj_t lwip_socket_setsockopt(mp_uint_t n_args, const mp_obj_t *args) {
ip_reset_option(socket->pcb.tcp, SOF_REUSEADDR);
}
break;
}
// level: IPPROTO_IP
case IP_ADD_MEMBERSHIP: {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[3], &bufinfo, MP_BUFFER_READ);
if (bufinfo.len != sizeof(ip_addr_t) * 2) {
mp_raise_ValueError(NULL);
}
// POSIX setsockopt has order: group addr, if addr, lwIP has it vice-versa
err_t err = igmp_joingroup((ip_addr_t*)bufinfo.buf + 1, bufinfo.buf);
if (err != ERR_OK) {
mp_raise_OSError(error_lookup_table[-err]);
}
break;
}
default:
printf("Warning: lwip.setsockopt() not implemented\n");
}
@ -1342,6 +1365,9 @@ STATIC const mp_rom_map_elem_t mp_module_lwip_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_SOL_SOCKET), MP_ROM_INT(1) },
{ MP_ROM_QSTR(MP_QSTR_SO_REUSEADDR), MP_ROM_INT(SOF_REUSEADDR) },
{ MP_ROM_QSTR(MP_QSTR_IPPROTO_IP), MP_ROM_INT(0) },
{ MP_ROM_QSTR(MP_QSTR_IP_ADD_MEMBERSHIP), MP_ROM_INT(IP_ADD_MEMBERSHIP) },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_lwip_globals, mp_module_lwip_globals_table);