diff options
Diffstat (limited to 'package/swconfig/src/swlib.c')
| -rw-r--r-- | package/swconfig/src/swlib.c | 614 |
1 files changed, 0 insertions, 614 deletions
diff --git a/package/swconfig/src/swlib.c b/package/swconfig/src/swlib.c deleted file mode 100644 index 3fde81641..000000000 --- a/package/swconfig/src/swlib.c +++ /dev/null @@ -1,614 +0,0 @@ -/* - * swlib.c: Switch configuration API (user space part) - * - * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public License - * version 2.1 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <inttypes.h> -#include <errno.h> -#include <stdint.h> -#include <getopt.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <linux/switch.h> -#include "swlib.h" - -//#define DEBUG 1 -#ifdef DEBUG -#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__) -#else -#define DPRINTF(fmt, ...) do {} while (0) -#endif - -static struct nl_handle *handle; -static struct nl_cache *cache; -static struct genl_family *family; -static struct nlattr *tb[SWITCH_ATTR_MAX]; -static int refcount = 0; - -static struct nla_policy port_policy[] = { - [SWITCH_PORT_ID] = { .type = NLA_U32 }, - [SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG }, -}; - -static inline void * -swlib_alloc(size_t size) -{ - void *ptr; - - ptr = malloc(size); - if (!ptr) - goto done; - memset(ptr, 0, size); - -done: - return ptr; -} - -static int -wait_handler(struct nl_msg *msg, void *arg) -{ - int *finished = arg; - - *finished = 1; - return NL_STOP; -} - -/* helper function for performing netlink requests */ -static int -swlib_call(int cmd, int (*call)(struct nl_msg *, void *), - int (*data)(struct nl_msg *, void *), void *arg) -{ - struct nl_msg *msg; - struct nl_cb *cb = NULL; - int finished; - int flags = 0; - int err; - - msg = nlmsg_alloc(); - if (!msg) { - fprintf(stderr, "Out of memory!\n"); - exit(1); - } - - if (!data) - flags |= NLM_F_DUMP; - - genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, genl_family_get_id(family), 0, flags, cmd, 0); - if (data) { - if (data(msg, arg) < 0) - goto nla_put_failure; - } - - cb = nl_cb_alloc(NL_CB_CUSTOM); - if (!cb) { - fprintf(stderr, "nl_cb_alloc failed.\n"); - exit(1); - } - - err = nl_send_auto_complete(handle, msg); - if (err < 0) { - fprintf(stderr, "nl_send_auto_complete failed: %d\n", err); - goto out; - } - - finished = 0; - - if (call) - nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, call, arg); - - if (data) - nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished); - else - nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, wait_handler, &finished); - - err = nl_recvmsgs(handle, cb); - if (err < 0) { - goto out; - } - - if (!finished) - err = nl_wait_for_ack(handle); - -out: - if (cb) - nl_cb_put(cb); -nla_put_failure: - nlmsg_free(msg); - return err; -} - -static int -send_attr(struct nl_msg *msg, void *arg) -{ - struct switch_val *val = arg; - struct switch_attr *attr = val->attr; - - NLA_PUT_U32(msg, SWITCH_ATTR_ID, attr->dev->id); - NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, attr->id); - switch(attr->atype) { - case SWLIB_ATTR_GROUP_PORT: - NLA_PUT_U32(msg, SWITCH_ATTR_OP_PORT, val->port_vlan); - break; - case SWLIB_ATTR_GROUP_VLAN: - NLA_PUT_U32(msg, SWITCH_ATTR_OP_VLAN, val->port_vlan); - break; - default: - break; - } - - return 0; - -nla_put_failure: - return -1; -} - -static int -store_port_val(struct nl_msg *msg, struct nlattr *nla, struct switch_val *val) -{ - struct nlattr *p; - int ports = val->attr->dev->ports; - int err = 0; - int remaining; - - if (!val->value.ports) - val->value.ports = malloc(sizeof(struct switch_port) * ports); - - nla_for_each_nested(p, nla, remaining) { - struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1]; - struct switch_port *port; - - if (val->len >= ports) - break; - - err = nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, p, port_policy); - if (err < 0) - goto out; - - if (!tb[SWITCH_PORT_ID]) - continue; - - port = &val->value.ports[val->len]; - port->id = nla_get_u32(tb[SWITCH_PORT_ID]); - port->flags = 0; - if (tb[SWITCH_PORT_FLAG_TAGGED]) - port->flags |= SWLIB_PORT_FLAG_TAGGED; - - val->len++; - } - -out: - return err; -} - -static int -store_val(struct nl_msg *msg, void *arg) -{ - struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); - struct switch_val *val = arg; - struct switch_attr *attr = val->attr; - - if (!val) - goto error; - - if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0), - genlmsg_attrlen(gnlh, 0), NULL) < 0) { - goto error; - } - - if (tb[SWITCH_ATTR_OP_VALUE_INT]) - val->value.i = nla_get_u32(tb[SWITCH_ATTR_OP_VALUE_INT]); - else if (tb[SWITCH_ATTR_OP_VALUE_STR]) - val->value.s = strdup(nla_get_string(tb[SWITCH_ATTR_OP_VALUE_STR])); - else if (tb[SWITCH_ATTR_OP_VALUE_PORTS]) - val->err = store_port_val(msg, tb[SWITCH_ATTR_OP_VALUE_PORTS], val); - - val->err = 0; - return 0; - -error: - return NL_SKIP; -} - -int -swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val) -{ - int cmd; - int err; - - switch(attr->atype) { - case SWLIB_ATTR_GROUP_GLOBAL: - cmd = SWITCH_CMD_GET_GLOBAL; - break; - case SWLIB_ATTR_GROUP_PORT: - cmd = SWITCH_CMD_GET_PORT; - break; - case SWLIB_ATTR_GROUP_VLAN: - cmd = SWITCH_CMD_GET_VLAN; - break; - default: - return -EINVAL; - } - - memset(&val->value, 0, sizeof(val->value)); - val->len = 0; - val->attr = attr; - val->err = -EINVAL; - err = swlib_call(cmd, store_val, send_attr, val); - if (!err) - err = val->err; - - return err; -} - -static int -send_attr_ports(struct nl_msg *msg, struct switch_val *val) -{ - struct nlattr *n; - int i; - - /* TODO implement multipart? */ - if (val->len == 0) - goto done; - n = nla_nest_start(msg, SWITCH_ATTR_OP_VALUE_PORTS); - if (!n) - goto nla_put_failure; - for (i = 0; i < val->len; i++) { - struct switch_port *port = &val->value.ports[i]; - struct nlattr *np; - - np = nla_nest_start(msg, SWITCH_ATTR_PORT); - if (!np) - goto nla_put_failure; - - NLA_PUT_U32(msg, SWITCH_PORT_ID, port->id); - if (port->flags & SWLIB_PORT_FLAG_TAGGED) - NLA_PUT_FLAG(msg, SWITCH_PORT_FLAG_TAGGED); - - nla_nest_end(msg, np); - } - nla_nest_end(msg, n); -done: - return 0; - -nla_put_failure: - return -1; -} - -static int -send_attr_val(struct nl_msg *msg, void *arg) -{ - struct switch_val *val = arg; - struct switch_attr *attr = val->attr; - - if (send_attr(msg, arg)) - goto nla_put_failure; - - switch(attr->type) { - case SWITCH_TYPE_NOVAL: - break; - case SWITCH_TYPE_INT: - NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val->value.i); - break; - case SWITCH_TYPE_STRING: - if (!val->value.s) - goto nla_put_failure; - NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val->value.s); - break; - case SWITCH_TYPE_PORTS: - if (send_attr_ports(msg, val) < 0) - goto nla_put_failure; - break; - default: - goto nla_put_failure; - } - return 0; - -nla_put_failure: - return -1; -} - -int -swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val) -{ - int cmd; - - switch(attr->atype) { - case SWLIB_ATTR_GROUP_GLOBAL: - cmd = SWITCH_CMD_SET_GLOBAL; - break; - case SWLIB_ATTR_GROUP_PORT: - cmd = SWITCH_CMD_SET_PORT; - break; - case SWLIB_ATTR_GROUP_VLAN: - cmd = SWITCH_CMD_SET_VLAN; - break; - default: - return -EINVAL; - } - - val->attr = attr; - return swlib_call(cmd, NULL, send_attr_val, val); -} - - -struct attrlist_arg { - int id; - int atype; - struct switch_dev *dev; - struct switch_attr *prev; - struct switch_attr **head; -}; - -static int -add_id(struct nl_msg *msg, void *arg) -{ - struct attrlist_arg *l = arg; - - NLA_PUT_U32(msg, SWITCH_ATTR_ID, l->id); - - return 0; -nla_put_failure: - return -1; -} - -static int -add_attr(struct nl_msg *msg, void *ptr) -{ - struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); - struct attrlist_arg *arg = ptr; - struct switch_attr *new; - - if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0), - genlmsg_attrlen(gnlh, 0), NULL) < 0) - goto done; - - new = swlib_alloc(sizeof(struct switch_attr)); - if (!new) - goto done; - - new->dev = arg->dev; - new->atype = arg->atype; - if (arg->prev) { - arg->prev->next = new; - } else { - arg->prev = *arg->head; - } - *arg->head = new; - arg->head = &new->next; - - if (tb[SWITCH_ATTR_OP_ID]) - new->id = nla_get_u32(tb[SWITCH_ATTR_OP_ID]); - if (tb[SWITCH_ATTR_OP_TYPE]) - new->type = nla_get_u32(tb[SWITCH_ATTR_OP_TYPE]); - if (tb[SWITCH_ATTR_OP_NAME]) - new->name = strdup(nla_get_string(tb[SWITCH_ATTR_OP_NAME])); - if (tb[SWITCH_ATTR_OP_DESCRIPTION]) - new->description = strdup(nla_get_string(tb[SWITCH_ATTR_OP_DESCRIPTION])); - -done: - return NL_SKIP; -} - -int -swlib_scan(struct switch_dev *dev) -{ - struct attrlist_arg arg; - - if (dev->ops || dev->port_ops || dev->vlan_ops) - return 0; - - arg.atype = SWLIB_ATTR_GROUP_GLOBAL; - arg.dev = dev; - arg.id = dev->id; - arg.prev = NULL; - arg.head = &dev->ops; - swlib_call(SWITCH_CMD_LIST_GLOBAL, add_attr, add_id, &arg); - - arg.atype = SWLIB_ATTR_GROUP_PORT; - arg.prev = NULL; - arg.head = &dev->port_ops; - swlib_call(SWITCH_CMD_LIST_PORT, add_attr, add_id, &arg); - - arg.atype = SWLIB_ATTR_GROUP_VLAN; - arg.prev = NULL; - arg.head = &dev->vlan_ops; - swlib_call(SWITCH_CMD_LIST_VLAN, add_attr, add_id, &arg); - - return 0; -} - -struct switch_attr *swlib_lookup_attr(struct switch_dev *dev, - enum swlib_attr_group atype, const char *name) -{ - struct switch_attr *head; - - if (!name || !dev) - return NULL; - - switch(atype) { - case SWLIB_ATTR_GROUP_GLOBAL: - head = dev->ops; - break; - case SWLIB_ATTR_GROUP_PORT: - head = dev->port_ops; - break; - case SWLIB_ATTR_GROUP_VLAN: - head = dev->vlan_ops; - break; - } - while(head) { - if (!strcmp(name, head->name)) - return head; - head = head->next; - } - - return NULL; -} - -static void -swlib_priv_free(void) -{ - if (cache) - nl_cache_free(cache); - if (handle) - nl_handle_destroy(handle); - handle = NULL; - cache = NULL; -} - -static int -swlib_priv_init(void) -{ - handle = nl_handle_alloc(); - if (!handle) { - DPRINTF("Failed to create handle\n"); - goto err; - } - - if (genl_connect(handle)) { - DPRINTF("Failed to connect to generic netlink\n"); - goto err; - } - - cache = genl_ctrl_alloc_cache(handle); - if (!cache) { - DPRINTF("Failed to allocate netlink cache\n"); - goto err; - } - - family = genl_ctrl_search_by_name(cache, "switch"); - if (!family) { - DPRINTF("Switch API not present\n"); - goto err; - } - return 0; - -err: - swlib_priv_free(); - return -EINVAL; -} - -struct swlib_scan_arg { - const char *name; - struct switch_dev *head; - struct switch_dev *ptr; -}; - -static int -add_switch(struct nl_msg *msg, void *arg) -{ - struct swlib_scan_arg *sa = arg; - struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); - struct switch_dev *dev; - const char *name; - - if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0) - goto done; - - if (!tb[SWITCH_ATTR_DEV_NAME]) - goto done; - - name = nla_get_string(tb[SWITCH_ATTR_DEV_NAME]); - if (sa->name && (strcmp(name, sa->name) != 0)) - goto done; - - dev = swlib_alloc(sizeof(struct switch_dev)); - if (!dev) - goto done; - - dev->dev_name = strdup(name); - if (tb[SWITCH_ATTR_ID]) - dev->id = nla_get_u32(tb[SWITCH_ATTR_ID]); - if (tb[SWITCH_ATTR_NAME]) - dev->name = strdup(nla_get_string(tb[SWITCH_ATTR_DEV_NAME])); - if (tb[SWITCH_ATTR_PORTS]) - dev->ports = nla_get_u32(tb[SWITCH_ATTR_PORTS]); - if (tb[SWITCH_ATTR_VLANS]) - dev->vlans = nla_get_u32(tb[SWITCH_ATTR_VLANS]); - - if (!sa->head) { - sa->head = dev; - sa->ptr = dev; - } else { - sa->ptr->next = dev; - sa->ptr = dev; - } - - refcount++; -done: - return NL_SKIP; -} - - -struct switch_dev * -swlib_connect(const char *name) -{ - struct swlib_scan_arg arg; - int err; - - if (!refcount) { - if (swlib_priv_init() < 0) - return NULL; - }; - - arg.head = NULL; - arg.ptr = NULL; - arg.name = name; - swlib_call(SWITCH_CMD_GET_SWITCH, add_switch, NULL, &arg); - - if (!refcount) - swlib_priv_free(); - - return arg.head; -} - -static void -swlib_free_attributes(struct switch_attr **head) -{ - struct switch_attr *a = *head; - struct switch_attr *next; - - while (a) { - next = a->next; - free(a); - a = next; - } - *head = NULL; -} - -void -swlib_free(struct switch_dev *dev) -{ - swlib_free_attributes(&dev->ops); - swlib_free_attributes(&dev->port_ops); - swlib_free_attributes(&dev->vlan_ops); - free(dev); - - if (--refcount == 0) - swlib_priv_free(); -} - -void -swlib_free_all(struct switch_dev *dev) -{ - struct switch_dev *p; - - while (dev) { - p = dev->next; - swlib_free(dev); - dev = p; - } -} |