diff options
Diffstat (limited to 'package/swconfig')
| -rw-r--r-- | package/swconfig/Makefile | 47 | ||||
| -rw-r--r-- | package/swconfig/src/Makefile | 12 | ||||
| -rw-r--r-- | package/swconfig/src/cli.c | 255 | ||||
| -rw-r--r-- | package/swconfig/src/swlib.c | 614 | ||||
| -rw-r--r-- | package/swconfig/src/swlib.h | 213 |
5 files changed, 1141 insertions, 0 deletions
diff --git a/package/swconfig/Makefile b/package/swconfig/Makefile new file mode 100644 index 0000000000..0d86438a79 --- /dev/null +++ b/package/swconfig/Makefile @@ -0,0 +1,47 @@ +# +# Copyright (C) 2006 OpenWrt.org +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# +# $Id$ + +include $(TOPDIR)/rules.mk +include $(INCLUDE_DIR)/kernel.mk + +PKG_NAME:=kmod-swconfig +PKG_RELEASE:=1 +PKG_BUILD_DEPENDS:=libnl + +include $(INCLUDE_DIR)/package.mk + +define Package/swconfig + SECTION:=base + CATEGORY:=Base system + DEPENDS:=@LINUX_2_6_26||LINUX_2_6_27 + TITLE:=Switch configuration utility +endef + +TARGET_CPPFLAGS += \ + -I$(STAGING_DIR)/usr/include \ + -I$(LINUX_DIR)/include \ + -I$(PKG_BUILD_DIR) + +define Build/Prepare + mkdir -p $(PKG_BUILD_DIR) + $(CP) ./src/* $(PKG_BUILD_DIR)/ +endef + +define Build/Compile + CFLAGS="$(TARGET_CFLAGS) $(TARGET_CPPFLAGS)" \ + $(MAKE) -C $(PKG_BUILD_DIR) \ + $(TARGET_CONFIGURE_OPTS) \ + LIBS="$(STAGING_DIR)/usr/lib/libnl.a -lm" +endef + +define Package/swconfig/install + $(INSTALL_DIR) $(1)/bin + $(INSTALL_BIN) $(PKG_BUILD_DIR)/swconfig $(1)/bin/swconfig +endef + +$(eval $(call BuildPackage,swconfig)) diff --git a/package/swconfig/src/Makefile b/package/swconfig/src/Makefile new file mode 100644 index 0000000000..64816af541 --- /dev/null +++ b/package/swconfig/src/Makefile @@ -0,0 +1,12 @@ +ifndef CFLAGS +CFLAGS = -O2 -g -I ../src +endif +LIBS=-lnl + +all: swconfig + +%.o: %.c + $(CC) $(CFLAGS) -c -o $@ $^ + +swconfig: cli.o swlib.o + $(CC) $(LDFLAGS) -o $@ $^ $(LIBS) diff --git a/package/swconfig/src/cli.c b/package/swconfig/src/cli.c new file mode 100644 index 0000000000..c6035e585c --- /dev/null +++ b/package/swconfig/src/cli.c @@ -0,0 +1,255 @@ +/* + * swconfig.c: Switch configuration utility + * + * 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 General Public License + * version 2 as published by the Free Software Foundatio. + * + * 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/types.h> +#include <linux/netlink.h> +#include <linux/genetlink.h> +#include <netlink/netlink.h> +#include <netlink/genl/genl.h> +#include <netlink/genl/ctrl.h> +#include <linux/switch.h> +#include "swlib.h" + +#define GET 1 +#define SET 2 + +void print_attrs(struct switch_attr *attr) +{ + int i = 0; + while (attr) { + const char *type; + switch(attr->type) { + case SWITCH_TYPE_INT: + type = "int"; + break; + case SWITCH_TYPE_STRING: + type = "string"; + break; + case SWITCH_TYPE_PORTS: + type = "ports"; + break; + case SWITCH_TYPE_NOVAL: + type = "none"; + break; + default: + type = "unknown"; + break; + } + printf("\tAttribute %d (%s): %s (%s)\n", ++i, type, attr->name, attr->description); + attr = attr->next; + } +} + +void list_attributes(struct switch_dev *dev) +{ + printf("Switch %d: %s(%s), ports: %d, vlans: %d\n", dev->id, dev->dev_name, dev->name, dev->ports, dev->vlans); + printf(" --switch\n"); + print_attrs(dev->ops); + printf(" --vlan\n"); + print_attrs(dev->vlan_ops); + printf(" --port\n"); + print_attrs(dev->port_ops); +} + +void print_usage(void) +{ + printf("swconfig dev <dev> [port <port>|vlan <vlan>] (help|set <key> <value>|get <key>)\n"); + exit(0); +} + +int main(int argc, char **argv) +{ + int retval = 0; + struct switch_dev *dev; + struct switch_attr *a; + struct switch_val val; + int err; + int i; + + struct switch_port *ports; + + int cmd = 0; + char *cdev = NULL; + int cport = -1; + int cvlan = -1; + char *ckey = NULL; + char *cvalue = NULL; + int chelp = 0; + + if(argc < 4) + print_usage(); + + if(strcmp(argv[1], "dev")) + print_usage(); + + cdev = argv[2]; + + for(i = 3; i < argc; i++) + { + int p; + if(!strcmp(argv[i], "help")) + { + chelp = 1; + continue; + } + if(i + 1 >= argc) + print_usage(); + p = atoi(argv[i + 1]); + if(!strcmp(argv[i], "port")) + { + cport = p; + } else if(!strcmp(argv[i], "vlan")) + { + cvlan = p; + } else if(!strcmp(argv[i], "set")) + { + if(argc <= i + 1) + print_usage(); + cmd = SET; + ckey = argv[i + 1]; + if (argc > i + 2) + cvalue = argv[i + 2]; + else + cvalue = NULL; + i++; + } else if(!strcmp(argv[i], "get")) + { + cmd = GET; + ckey = argv[i + 1]; + } else{ + print_usage(); + } + i++; + } + + if(cport > -1 && cvlan > -1) + print_usage(); + + dev = swlib_connect(cdev); + if (!dev) { + fprintf(stderr, "Failed to connect to the switch\n"); + return 1; + } + + ports = malloc(sizeof(struct switch_port) * dev->ports); + memset(ports, 0, sizeof(struct switch_port) * dev->ports); + swlib_scan(dev); + + if(chelp) + { + list_attributes(dev); + goto out; + } + + if(cport > -1) + a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_PORT, ckey); + else if(cvlan > -1) + a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_VLAN, ckey); + else + a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_GLOBAL, ckey); + + if(!a) + { + fprintf(stderr, "Unknown attribute \"%s\"\n", ckey); + goto out; + } + + switch(cmd) + { + case SET: + if ((a->type != SWITCH_TYPE_NOVAL) && + (cvalue == NULL)) + print_usage(); + + switch(a->type) { + case SWITCH_TYPE_INT: + val.value.i = atoi(cvalue); + break; + case SWITCH_TYPE_STRING: + val.value.s = cvalue; + break; + case SWITCH_TYPE_PORTS: + val.len = 0; + while(cvalue && *cvalue) + { + ports[val.len].flags = 0; + ports[val.len].id = strtol(cvalue, &cvalue, 10); + while(*cvalue && !isspace(*cvalue)) { + if (*cvalue == 't') + ports[val.len].flags |= SWLIB_PORT_FLAG_TAGGED; + cvalue++; + } + if (*cvalue) + cvalue++; + val.len++; + } + val.value.ports = ports; + break; + default: + break; + } + if(cvlan > -1) + val.port_vlan = cvlan; + if(cport > -1) + val.port_vlan = cport; + if(swlib_set_attr(dev, a, &val) < 0) + { + fprintf(stderr, "failed\n"); + retval = -1; + goto out; + } + break; + case GET: + if(cvlan > -1) + val.port_vlan = cvlan; + if(cport > -1) + val.port_vlan = cport; + if(swlib_get_attr(dev, a, &val) < 0) + { + fprintf(stderr, "failed\n"); + retval = -1; + goto out; + } + switch(a->type) { + case SWITCH_TYPE_INT: + printf("%d\n", val.value.i); + break; + case SWITCH_TYPE_STRING: + printf("%s\n", val.value.s); + break; + case SWITCH_TYPE_PORTS: + for(i = 0; i < val.len; i++) + printf("%d ", val.value.ports[i]); + printf("\n"); + break; + } + } + +out: + swlib_free_all(dev); + free(ports); + + return 0; +} diff --git a/package/swconfig/src/swlib.c b/package/swconfig/src/swlib.c new file mode 100644 index 0000000000..3fde816414 --- /dev/null +++ b/package/swconfig/src/swlib.c @@ -0,0 +1,614 @@ +/* + * 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; + } +} diff --git a/package/swconfig/src/swlib.h b/package/swconfig/src/swlib.h new file mode 100644 index 0000000000..e00ff47a51 --- /dev/null +++ b/package/swconfig/src/swlib.h @@ -0,0 +1,213 @@ +/* + * swlib.h: 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. + * + +Usage of the library functions: + + The main datastructure for a switch is the struct switch_device + To get started, you first need to use switch_connect() to probe + for switches and allocate an instance of this struct. + + There are two possible usage modes: + dev = switch_connect("eth0"); + - this call will look for a switch registered for the linux device + "eth0" and only allocate a switch_device for this particular switch. + + dev = switch_connect(NULL) + - this will return one switch_device struct for each available + switch. The switch_device structs are chained with by ->next pointer + + Then to query a switch for all available attributes, use: + swlib_scan(dev); + + All allocated datastructures for the switch_device struct can be freed with + swlib_free(dev); + or + swlib_free_all(dev); + + The latter traverses a whole chain of switch_device structs and frees them all + + Switch attributes (struct switch_attr) are divided into three groups: + dev->ops: + - global settings + dev->port_ops: + - per-port settings + dev->vlan_ops: + - per-vlan settings + + switch_lookup_attr() is a small helper function to locate attributes + by name. + + switch_set_attr() and switch_get_attr() can alter or request the values + of attributes. + +Usage of the switch_attr struct: + + ->atype: attribute group, one of: + - SWLIB_ATTR_GROUP_GLOBAL + - SWLIB_ATTR_GROUP_VLAN + - SWLIB_ATTR_GROUP_PORT + + ->id: identifier for the attribute + + ->type: data type, one of: + - SWITCH_TYPE_INT + - SWITCH_TYPE_STRING + - SWITCH_TYPE_PORT + + ->name: short name of the attribute + ->description: longer description + ->next: pointer to the next attribute of the current group + + +Usage of the switch_val struct: + + When setting attributes, following members of the struct switch_val need + to be set up: + + ->len (for attr->type == SWITCH_TYPE_PORT) + ->port_vlan: + - port number (for attr->atype == SWLIB_ATTR_GROUP_PORT), or: + - vlan number (for attr->atype == SWLIB_ATTR_GROUP_VLAN) + ->value.i (for attr->type == SWITCH_TYPE_INT) + ->value.s (for attr->type == SWITCH_TYPE_STRING) + - owned by the caller, not stored in the library internally + ->value.ports (for attr->type == SWITCH_TYPE_PORT) + - must point to an array of at lest val->len * sizeof(struct switch_port) + + When getting string attributes, val->value.s must be freed by the caller + When getting port list attributes, an internal static buffer is used, + which changes from call to call. + + */ + +#ifndef __SWLIB_H +#define __SWLIB_H + +enum swlib_attr_group { + SWLIB_ATTR_GROUP_GLOBAL, + SWLIB_ATTR_GROUP_VLAN, + SWLIB_ATTR_GROUP_PORT, +}; + +enum swlib_port_flags { + SWLIB_PORT_FLAG_TAGGED = (1 << 0), +}; + + +struct switch_dev; +struct switch_attr; +struct switch_port; +struct switch_val; + +struct switch_dev { + int id; + const char *name; + const char *dev_name; + int ports; + int vlans; + struct switch_attr *ops; + struct switch_attr *port_ops; + struct switch_attr *vlan_ops; + struct switch_dev *next; + void *priv; +}; + +struct switch_val { + struct switch_attr *attr; + int len; + int err; + int port_vlan; + union { + const char *s; + int i; + struct switch_port *ports; + } value; +}; + +struct switch_attr { + struct switch_dev *dev; + int atype; + int id; + int type; + const char *name; + const char *description; + struct switch_attr *next; +}; + +struct switch_port { + unsigned int id; + unsigned int flags; +}; + +/** + * swlib_connect: connect to the switch through netlink + * @name: name of the ethernet interface, + * + * if name is NULL, it connect and builds a chain of all switches + */ +struct switch_dev *swlib_connect(const char *name); + +/** + * swlib_free: free all dynamically allocated data for the switch connection + * @dev: switch device struct + * + * all members of a switch device chain (generated by swlib_connect(NULL)) + * must be freed individually + */ +void swlib_free(struct switch_dev *dev); + +/** + * swlib_free_all: run swlib_free on all devices in the chain + * @dev: switch device struct + */ +void swlib_free_all(struct switch_dev *dev); + +/** + * swlib_scan: probe the switch driver for available commands/attributes + * @dev: switch device struct + */ +int swlib_scan(struct switch_dev *dev); + +/** + * swlib_lookup_attr: look up a switch attribute + * @dev: switch device struct + * @type: global, port or vlan + * @name: name of the attribute + */ +struct switch_attr *swlib_lookup_attr(struct switch_dev *dev, + enum swlib_attr_group atype, const char *name); + +/** + * swlib_set_attr: set the value for an attribute + * @dev: switch device struct + * @attr: switch attribute struct + * @val: attribute value pointer + * returns 0 on success + */ +int swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr, + struct switch_val *val); + +/** + * swlib_get_attr: get the value for an attribute + * @dev: switch device struct + * @attr: switch attribute struct + * @val: attribute value pointer + * returns 0 on success + * for string attributes, the result string must be freed by the caller + */ +int swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr, + struct switch_val *val); + +#endif |