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https://github.com/linux-usb-gadgets/libusbgx.git
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libusbgx: Add internal API for defining function types
Adding support for a new function type was quite complicated. Moreover the main library source fail was growing realy fast. As a solution introduce internal OO API for defining function. Thanks to this support for each function may be placed in a separate file. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
This commit is contained in:
Krzysztof Opasiak
parent
639a329af5
commit
013b9cc990
11 changed files with 1674 additions and 1284 deletions
248
src/function/ether.c
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248
src/function/ether.c
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/*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*/
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#include "usbg/usbg.h"
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#include "usbg/usbg_internal.h"
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#include <malloc.h>
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#ifdef HAS_LIBCONFIG
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#include <libconfig.h>
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#endif
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static int ether_set_attrs(struct usbg_function *f,
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const usbg_function_attrs *f_attrs)
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{
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int ret = USBG_SUCCESS;
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char addr_buf[USBG_MAX_STR_LENGTH];
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const usbg_f_net_attrs *attrs = &f_attrs->attrs.net;
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char *addr;
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/* ifname is read only so we accept only empty string for this param */
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if (attrs->ifname && attrs->ifname[0]) {
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ret = USBG_ERROR_INVALID_PARAM;
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goto out;
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}
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addr = usbg_ether_ntoa_r(&attrs->dev_addr, addr_buf);
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ret = usbg_write_string(f->path, f->name, "dev_addr", addr);
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if (ret != USBG_SUCCESS)
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goto out;
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addr = usbg_ether_ntoa_r(&attrs->host_addr, addr_buf);
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ret = usbg_write_string(f->path, f->name, "host_addr", addr);
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if (ret != USBG_SUCCESS)
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goto out;
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ret = usbg_write_dec(f->path, f->name, "qmult", attrs->qmult);
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out:
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return ret;
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}
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static int ether_get_attrs(struct usbg_function *f,
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usbg_function_attrs *f_attrs)
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{
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struct ether_addr *addr;
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struct ether_addr addr_buf;
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char str_addr[USBG_MAX_STR_LENGTH];
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usbg_f_net_attrs *attrs = &f_attrs->attrs.net;
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int ret = USBG_ERROR_INVALID_PARAM;
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ret = usbg_read_string(f->path, f->name, "dev_addr", str_addr);
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if (ret != USBG_SUCCESS)
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goto out;
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addr = ether_aton_r(str_addr, &addr_buf);
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if (addr) {
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attrs->dev_addr = *addr;
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} else {
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ret = USBG_ERROR_IO;
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goto out;
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}
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ret = usbg_read_string(f->path, f->name, "host_addr", str_addr);
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if (ret != USBG_SUCCESS)
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goto out;
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addr = ether_aton_r(str_addr, &addr_buf);
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if (addr) {
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attrs->host_addr = *addr;
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} else {
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ret = USBG_ERROR_IO;
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goto out;
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}
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ret = usbg_read_dec(f->path, f->name, "qmult", &(attrs->qmult));
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if (ret != USBG_SUCCESS)
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goto out;
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ret = usbg_read_string_alloc(f->path, f->name, "ifname",
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&(attrs->ifname));
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f_attrs->header.attrs_type = USBG_F_ATTRS_NET;
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out:
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return ret;
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}
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static void ether_cleanup_attrs(struct usbg_function *f,
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usbg_function_attrs *f_attrs)
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{
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free((char*)f_attrs->attrs.net.ifname);
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f_attrs->attrs.net.ifname = NULL;
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}
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#ifdef HAS_LIBCONFIG
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static int ether_libconfig_import(struct usbg_function *f,
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config_setting_t *root)
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{
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config_setting_t *node;
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int ret = USBG_SUCCESS;
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int qmult;
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struct ether_addr *addr;
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struct ether_addr addr_buf;
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const char *str;
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#define GET_OPTIONAL_ADDR(NAME) \
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do { \
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node = config_setting_get_member(root, #NAME); \
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if (node) { \
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str = config_setting_get_string(node); \
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if (!str) { \
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ret = USBG_ERROR_INVALID_TYPE; \
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goto out; \
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} \
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\
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addr = ether_aton_r(str, &addr_buf); \
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if (!addr) { \
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ret = USBG_ERROR_INVALID_VALUE; \
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goto out; \
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} \
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ret = usbg_set_net_##NAME(f, addr); \
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if (ret != USBG_SUCCESS) \
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goto out; \
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} \
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} while (0)
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GET_OPTIONAL_ADDR(host_addr);
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GET_OPTIONAL_ADDR(dev_addr);
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#undef GET_OPTIONAL_ADDR
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node = config_setting_get_member(root, "qmult");
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if (node) {
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if (!usbg_config_is_int(node)) {
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ret = USBG_ERROR_INVALID_TYPE;
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goto out;
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}
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qmult = config_setting_get_int(node);
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ret = usbg_set_net_qmult(f, qmult);
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}
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out:
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return ret;
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}
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static int ether_libconfig_export(struct usbg_function *f,
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config_setting_t *root)
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{
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config_setting_t *node;
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char *addr;
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char addr_buf[USBG_MAX_STR_LENGTH];
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int cfg_ret, usbg_ret;
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usbg_function_attrs f_attrs;
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usbg_f_net_attrs *attrs = &f_attrs.attrs.net;
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int ret = USBG_ERROR_NO_MEM;
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usbg_ret = ether_get_attrs(f, &f_attrs);
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if (usbg_ret != USBG_SUCCESS) {
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ret = usbg_ret;
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goto out;
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}
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node = config_setting_add(root, "dev_addr", CONFIG_TYPE_STRING);
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if (!node)
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goto cleanup;
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addr = usbg_ether_ntoa_r(&attrs->dev_addr, addr_buf);
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cfg_ret = config_setting_set_string(node, addr);
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if (cfg_ret != CONFIG_TRUE) {
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ret = USBG_ERROR_OTHER_ERROR;
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goto cleanup;
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}
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node = config_setting_add(root, "host_addr", CONFIG_TYPE_STRING);
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if (!node)
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goto cleanup;
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addr = usbg_ether_ntoa_r(&attrs->host_addr, addr_buf);
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cfg_ret = config_setting_set_string(node, addr);
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if (cfg_ret != CONFIG_TRUE) {
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ret = USBG_ERROR_OTHER_ERROR;
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goto cleanup;
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}
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node = config_setting_add(root, "qmult", CONFIG_TYPE_INT);
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if (!node)
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goto cleanup;
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cfg_ret = config_setting_set_int(node, attrs->qmult);
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ret = cfg_ret == CONFIG_TRUE ? 0 : USBG_ERROR_OTHER_ERROR;
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/* ifname is read only so we don't export it */
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cleanup:
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ether_cleanup_attrs(f, &f_attrs);
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out:
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return ret;
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}
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#define ETHER_LIBCONFIG_DEP_OPS \
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.import = ether_libconfig_import, \
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.export = ether_libconfig_export
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#else
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#define ETHER_LIBCONFIG_DEP_OPS
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#endif /* HAS_LIBCONFIG */
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#define ETHER_FUNCTION_OPTS \
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.set_attrs = ether_set_attrs, \
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.get_attrs = ether_get_attrs, \
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.cleanup_attrs = ether_cleanup_attrs, \
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ETHER_LIBCONFIG_DEP_OPS
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struct usbg_function_type usbg_f_type_ecm = {
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.name = "ecm",
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ETHER_FUNCTION_OPTS
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};
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struct usbg_function_type usbg_f_type_subset = {
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.name = "geth",
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ETHER_FUNCTION_OPTS
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};
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struct usbg_function_type usbg_f_type_ncm = {
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.name = "ncm",
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ETHER_FUNCTION_OPTS
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};
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struct usbg_function_type usbg_f_type_eem = {
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.name = "eem",
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ETHER_FUNCTION_OPTS
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};
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struct usbg_function_type usbg_f_type_rndis = {
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.name = "rndis",
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ETHER_FUNCTION_OPTS
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};
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