diff options
Diffstat (limited to 'package/wprobe/src/user')
| -rw-r--r-- | package/wprobe/src/user/Makefile | 21 | ||||
| -rw-r--r-- | package/wprobe/src/user/list.h | 601 | ||||
| -rw-r--r-- | package/wprobe/src/user/wprobe-info.c | 175 | ||||
| -rw-r--r-- | package/wprobe/src/user/wprobe.c | 472 | ||||
| -rw-r--r-- | package/wprobe/src/user/wprobe.h | 143 |
5 files changed, 1412 insertions, 0 deletions
diff --git a/package/wprobe/src/user/Makefile b/package/wprobe/src/user/Makefile new file mode 100644 index 000000000..e10dfc0d2 --- /dev/null +++ b/package/wprobe/src/user/Makefile @@ -0,0 +1,21 @@ +CFLAGS = -O2 +CPPFLAGS ?= -I../kernel +WFLAGS = -Wall -Werror +LDFLAGS = + +LIBNL = -lnl +LIBM = -lm +LIBS = $(LIBNL) $(LIBM) + +all: libwprobe.a wprobe-info + +libwprobe.a: wprobe.o + rm -f $@ + $(AR) rcu $@ $^ + $(RANLIB) $@ + +%.o: %.c + $(CC) $(WFLAGS) -c -o $@ $(CPPFLAGS) $(CFLAGS) $< + +wprobe-info: wprobe-info.o wprobe.o + $(CC) -o $@ $^ $(LDFLAGS) $(LIBS) diff --git a/package/wprobe/src/user/list.h b/package/wprobe/src/user/list.h new file mode 100644 index 000000000..2959a061d --- /dev/null +++ b/package/wprobe/src/user/list.h @@ -0,0 +1,601 @@ +#ifndef _LINUX_LIST_H +#define _LINUX_LIST_H + +#include <stddef.h> +/** + * container_of - cast a member of a structure out to the containing structure + * @ptr: the pointer to the member. + * @type: the type of the container struct this is embedded in. + * @member: the name of the member within the struct. + * + */ +#ifndef container_of +#define container_of(ptr, type, member) ( \ + (type *)( (char *)ptr - offsetof(type,member) )) +#endif + + +/* + * Simple doubly linked list implementation. + * + * Some of the internal functions ("__xxx") are useful when + * manipulating whole lists rather than single entries, as + * sometimes we already know the next/prev entries and we can + * generate better code by using them directly rather than + * using the generic single-entry routines. + */ + +struct list_head { + struct list_head *next, *prev; +}; + +#define LIST_HEAD_INIT(name) { &(name), &(name) } + +#define LIST_HEAD(name) \ + struct list_head name = LIST_HEAD_INIT(name) + +static inline void INIT_LIST_HEAD(struct list_head *list) +{ + list->next = list; + list->prev = list; +} + +/* + * Insert a new entry between two known consecutive entries. + * + * This is only for internal list manipulation where we know + * the prev/next entries already! + */ +static inline void __list_add(struct list_head *new, + struct list_head *prev, + struct list_head *next) +{ + next->prev = new; + new->next = next; + new->prev = prev; + prev->next = new; +} + +/** + * list_add - add a new entry + * @new: new entry to be added + * @head: list head to add it after + * + * Insert a new entry after the specified head. + * This is good for implementing stacks. + */ +static inline void list_add(struct list_head *new, struct list_head *head) +{ + __list_add(new, head, head->next); +} + + +/** + * list_add_tail - add a new entry + * @new: new entry to be added + * @head: list head to add it before + * + * Insert a new entry before the specified head. + * This is useful for implementing queues. + */ +static inline void list_add_tail(struct list_head *new, struct list_head *head) +{ + __list_add(new, head->prev, head); +} + + +/* + * Delete a list entry by making the prev/next entries + * point to each other. + * + * This is only for internal list manipulation where we know + * the prev/next entries already! + */ +static inline void __list_del(struct list_head * prev, struct list_head * next) +{ + next->prev = prev; + prev->next = next; +} + +/** + * list_del - deletes entry from list. + * @entry: the element to delete from the list. + * Note: list_empty() on entry does not return true after this, the entry is + * in an undefined state. + */ +static inline void list_del(struct list_head *entry) +{ + __list_del(entry->prev, entry->next); + entry->next = NULL; + entry->prev = NULL; +} + +/** + * list_replace - replace old entry by new one + * @old : the element to be replaced + * @new : the new element to insert + * + * If @old was empty, it will be overwritten. + */ +static inline void list_replace(struct list_head *old, + struct list_head *new) +{ + new->next = old->next; + new->next->prev = new; + new->prev = old->prev; + new->prev->next = new; +} + +static inline void list_replace_init(struct list_head *old, + struct list_head *new) +{ + list_replace(old, new); + INIT_LIST_HEAD(old); +} + +/** + * list_del_init - deletes entry from list and reinitialize it. + * @entry: the element to delete from the list. + */ +static inline void list_del_init(struct list_head *entry) +{ + __list_del(entry->prev, entry->next); + INIT_LIST_HEAD(entry); +} + +/** + * list_move - delete from one list and add as another's head + * @list: the entry to move + * @head: the head that will precede our entry + */ +static inline void list_move(struct list_head *list, struct list_head *head) +{ + __list_del(list->prev, list->next); + list_add(list, head); +} + +/** + * list_move_tail - delete from one list and add as another's tail + * @list: the entry to move + * @head: the head that will follow our entry + */ +static inline void list_move_tail(struct list_head *list, + struct list_head *head) +{ + __list_del(list->prev, list->next); + list_add_tail(list, head); +} + +/** + * list_is_last - tests whether @list is the last entry in list @head + * @list: the entry to test + * @head: the head of the list + */ +static inline int list_is_last(const struct list_head *list, + const struct list_head *head) +{ + return list->next == head; +} + +/** + * list_empty - tests whether a list is empty + * @head: the list to test. + */ +static inline int list_empty(const struct list_head *head) +{ + return head->next == head; +} + +/** + * list_empty_careful - tests whether a list is empty and not being modified + * @head: the list to test + * + * Description: + * tests whether a list is empty _and_ checks that no other CPU might be + * in the process of modifying either member (next or prev) + * + * NOTE: using list_empty_careful() without synchronization + * can only be safe if the only activity that can happen + * to the list entry is list_del_init(). Eg. it cannot be used + * if another CPU could re-list_add() it. + */ +static inline int list_empty_careful(const struct list_head *head) +{ + struct list_head *next = head->next; + return (next == head) && (next == head->prev); +} + +static inline void __list_splice(struct list_head *list, + struct list_head *head) +{ + struct list_head *first = list->next; + struct list_head *last = list->prev; + struct list_head *at = head->next; + + first->prev = head; + head->next = first; + + last->next = at; + at->prev = last; +} + +/** + * list_splice - join two lists + * @list: the new list to add. + * @head: the place to add it in the first list. + */ +static inline void list_splice(struct list_head *list, struct list_head *head) +{ + if (!list_empty(list)) + __list_splice(list, head); +} + +/** + * list_splice_init - join two lists and reinitialise the emptied list. + * @list: the new list to add. + * @head: the place to add it in the first list. + * + * The list at @list is reinitialised + */ +static inline void list_splice_init(struct list_head *list, + struct list_head *head) +{ + if (!list_empty(list)) { + __list_splice(list, head); + INIT_LIST_HEAD(list); + } +} + +/** + * list_entry - get the struct for this entry + * @ptr: the &struct list_head pointer. + * @type: the type of the struct this is embedded in. + * @member: the name of the list_struct within the struct. + */ +#define list_entry(ptr, type, member) \ + container_of(ptr, type, member) + +/** + * list_first_entry - get the first element from a list + * @ptr: the list head to take the element from. + * @type: the type of the struct this is embedded in. + * @member: the name of the list_struct within the struct. + * + * Note, that list is expected to be not empty. + */ +#define list_first_entry(ptr, type, member) \ + list_entry((ptr)->next, type, member) + +/** + * list_for_each - iterate over a list + * @pos: the &struct list_head to use as a loop cursor. + * @head: the head for your list. + */ +#define list_for_each(pos, head) \ + for (pos = (head)->next; pos != (head); \ + pos = pos->next) + +/** + * __list_for_each - iterate over a list + * @pos: the &struct list_head to use as a loop cursor. + * @head: the head for your list. + * + * This variant differs from list_for_each() in that it's the + * simplest possible list iteration code, no prefetching is done. + * Use this for code that knows the list to be very short (empty + * or 1 entry) most of the time. + */ +#define __list_for_each(pos, head) \ + for (pos = (head)->next; pos != (head); pos = pos->next) + +/** + * list_for_each_prev - iterate over a list backwards + * @pos: the &struct list_head to use as a loop cursor. + * @head: the head for your list. + */ +#define list_for_each_prev(pos, head) \ + for (pos = (head)->prev; pos != (head); \ + pos = pos->prev) + +/** + * list_for_each_safe - iterate over a list safe against removal of list entry + * @pos: the &struct list_head to use as a loop cursor. + * @n: another &struct list_head to use as temporary storage + * @head: the head for your list. + */ +#define list_for_each_safe(pos, n, head) \ + for (pos = (head)->next, n = pos->next; pos != (head); \ + pos = n, n = pos->next) + +/** + * list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry + * @pos: the &struct list_head to use as a loop cursor. + * @n: another &struct list_head to use as temporary storage + * @head: the head for your list. + */ +#define list_for_each_prev_safe(pos, n, head) \ + for (pos = (head)->prev, n = pos->prev; \ + pos != (head); \ + pos = n, n = pos->prev) + +/** + * list_for_each_entry - iterate over list of given type + * @pos: the type * to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + */ +#define list_for_each_entry(pos, head, member) \ + for (pos = list_entry((head)->next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = list_entry(pos->member.next, typeof(*pos), member)) + +/** + * list_for_each_entry_reverse - iterate backwards over list of given type. + * @pos: the type * to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + */ +#define list_for_each_entry_reverse(pos, head, member) \ + for (pos = list_entry((head)->prev, typeof(*pos), member); \ + &pos->member != (head); \ + pos = list_entry(pos->member.prev, typeof(*pos), member)) + +/** + * list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue() + * @pos: the type * to use as a start point + * @head: the head of the list + * @member: the name of the list_struct within the struct. + * + * Prepares a pos entry for use as a start point in list_for_each_entry_continue(). + */ +#define list_prepare_entry(pos, head, member) \ + ((pos) ? : list_entry(head, typeof(*pos), member)) + +/** + * list_for_each_entry_continue - continue iteration over list of given type + * @pos: the type * to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + * + * Continue to iterate over list of given type, continuing after + * the current position. + */ +#define list_for_each_entry_continue(pos, head, member) \ + for (pos = list_entry(pos->member.next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = list_entry(pos->member.next, typeof(*pos), member)) + +/** + * list_for_each_entry_continue_reverse - iterate backwards from the given point + * @pos: the type * to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + * + * Start to iterate over list of given type backwards, continuing after + * the current position. + */ +#define list_for_each_entry_continue_reverse(pos, head, member) \ + for (pos = list_entry(pos->member.prev, typeof(*pos), member); \ + &pos->member != (head); \ + pos = list_entry(pos->member.prev, typeof(*pos), member)) + +/** + * list_for_each_entry_from - iterate over list of given type from the current point + * @pos: the type * to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + * + * Iterate over list of given type, continuing from current position. + */ +#define list_for_each_entry_from(pos, head, member) \ + for (; &pos->member != (head); \ + pos = list_entry(pos->member.next, typeof(*pos), member)) + +/** + * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry + * @pos: the type * to use as a loop cursor. + * @n: another type * to use as temporary storage + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + */ +#define list_for_each_entry_safe(pos, n, head, member) \ + for (pos = list_entry((head)->next, typeof(*pos), member), \ + n = list_entry(pos->member.next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = n, n = list_entry(n->member.next, typeof(*n), member)) + +/** + * list_for_each_entry_safe_continue + * @pos: the type * to use as a loop cursor. + * @n: another type * to use as temporary storage + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + * + * Iterate over list of given type, continuing after current point, + * safe against removal of list entry. + */ +#define list_for_each_entry_safe_continue(pos, n, head, member) \ + for (pos = list_entry(pos->member.next, typeof(*pos), member), \ + n = list_entry(pos->member.next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = n, n = list_entry(n->member.next, typeof(*n), member)) + +/** + * list_for_each_entry_safe_from + * @pos: the type * to use as a loop cursor. + * @n: another type * to use as temporary storage + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + * + * Iterate over list of given type from current point, safe against + * removal of list entry. + */ +#define list_for_each_entry_safe_from(pos, n, head, member) \ + for (n = list_entry(pos->member.next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = n, n = list_entry(n->member.next, typeof(*n), member)) + +/** + * list_for_each_entry_safe_reverse + * @pos: the type * to use as a loop cursor. + * @n: another type * to use as temporary storage + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + * + * Iterate backwards over list of given type, safe against removal + * of list entry. + */ +#define list_for_each_entry_safe_reverse(pos, n, head, member) \ + for (pos = list_entry((head)->prev, typeof(*pos), member), \ + n = list_entry(pos->member.prev, typeof(*pos), member); \ + &pos->member != (head); \ + pos = n, n = list_entry(n->member.prev, typeof(*n), member)) + +/* + * Double linked lists with a single pointer list head. + * Mostly useful for hash tables where the two pointer list head is + * too wasteful. + * You lose the ability to access the tail in O(1). + */ + +struct hlist_head { + struct hlist_node *first; +}; + +struct hlist_node { + struct hlist_node *next, **pprev; +}; + +#define HLIST_HEAD_INIT { .first = NULL } +#define HLIST_HEAD(name) struct hlist_head name = { .first = NULL } +#define INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL) +static inline void INIT_HLIST_NODE(struct hlist_node *h) +{ + h->next = NULL; + h->pprev = NULL; +} + +static inline int hlist_unhashed(const struct hlist_node *h) +{ + return !h->pprev; +} + +static inline int hlist_empty(const struct hlist_head *h) +{ + return !h->first; +} + +static inline void __hlist_del(struct hlist_node *n) +{ + struct hlist_node *next = n->next; + struct hlist_node **pprev = n->pprev; + *pprev = next; + if (next) + next->pprev = pprev; +} + +static inline void hlist_del(struct hlist_node *n) +{ + __hlist_del(n); + n->next = NULL; + n->pprev = NULL; +} + +static inline void hlist_del_init(struct hlist_node *n) +{ + if (!hlist_unhashed(n)) { + __hlist_del(n); + INIT_HLIST_NODE(n); + } +} + + +static inline void hlist_add_head(struct hlist_node *n, struct hlist_head *h) +{ + struct hlist_node *first = h->first; + n->next = first; + if (first) + first->pprev = &n->next; + h->first = n; + n->pprev = &h->first; +} + + +/* next must be != NULL */ +static inline void hlist_add_before(struct hlist_node *n, + struct hlist_node *next) +{ + n->pprev = next->pprev; + n->next = next; + next->pprev = &n->next; + *(n->pprev) = n; +} + +static inline void hlist_add_after(struct hlist_node *n, + struct hlist_node *next) +{ + next->next = n->next; + n->next = next; + next->pprev = &n->next; + + if(next->next) + next->next->pprev = &next->next; +} + +#define hlist_entry(ptr, type, member) container_of(ptr,type,member) + +#define hlist_for_each(pos, head) \ + for (pos = (head)->first; pos; pos = pos->next) + +#define hlist_for_each_safe(pos, n, head) \ + for (pos = (head)->first; pos; pos = n) + +/** + * hlist_for_each_entry - iterate over list of given type + * @tpos: the type * to use as a loop cursor. + * @pos: the &struct hlist_node to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the hlist_node within the struct. + */ +#define hlist_for_each_entry(tpos, pos, head, member) \ + for (pos = (head)->first; pos && \ + ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ + pos = pos->next) + +/** + * hlist_for_each_entry_continue - iterate over a hlist continuing after current point + * @tpos: the type * to use as a loop cursor. + * @pos: the &struct hlist_node to use as a loop cursor. + * @member: the name of the hlist_node within the struct. + */ +#define hlist_for_each_entry_continue(tpos, pos, member) \ + for (pos = (pos)->next; pos && \ + ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ + pos = pos->next) + +/** + * hlist_for_each_entry_from - iterate over a hlist continuing from current point + * @tpos: the type * to use as a loop cursor. + * @pos: the &struct hlist_node to use as a loop cursor. + * @member: the name of the hlist_node within the struct. + */ +#define hlist_for_each_entry_from(tpos, pos, member) \ + for (; pos && \ + ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ + pos = pos->next) + +/** + * hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry + * @tpos: the type * to use as a loop cursor. + * @pos: the &struct hlist_node to use as a loop cursor. + * @n: another &struct hlist_node to use as temporary storage + * @head: the head for your list. + * @member: the name of the hlist_node within the struct. + */ +#define hlist_for_each_entry_safe(tpos, pos, n, head, member) \ + for (pos = (head)->first; \ + pos && ({ n = pos->next; 1; }) && \ + ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ + pos = n) + +#endif diff --git a/package/wprobe/src/user/wprobe-info.c b/package/wprobe/src/user/wprobe-info.c new file mode 100644 index 000000000..b8918711c --- /dev/null +++ b/package/wprobe/src/user/wprobe-info.c @@ -0,0 +1,175 @@ +/* + * wprobe-test.c: Wireless probe user space test code + * Copyright (C) 2008-2009 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 + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * 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 <stdbool.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <linux/wprobe.h> +#include "wprobe.h" + +static const char * +wprobe_dump_value(struct wprobe_attribute *attr) +{ + static char buf[128]; + +#define HANDLE_TYPE(_type, _format) \ + case WPROBE_VAL_##_type: \ + snprintf(buf, sizeof(buf), _format, attr->val._type); \ + break + + switch(attr->type) { + HANDLE_TYPE(S8, "%d"); + HANDLE_TYPE(S16, "%d"); + HANDLE_TYPE(S32, "%d"); + HANDLE_TYPE(S64, "%lld"); + HANDLE_TYPE(U8, "%d"); + HANDLE_TYPE(U16, "%d"); + HANDLE_TYPE(U32, "%d"); + HANDLE_TYPE(U64, "%lld"); + case WPROBE_VAL_STRING: + /* FIXME: implement this */ + default: + strncpy(buf, "<unknown>", sizeof(buf)); + break; + } + if ((attr->flags & WPROBE_F_KEEPSTAT) && + (attr->val.n > 0)) { + int len = strlen(buf); + snprintf(buf + len, sizeof(buf) - len, " (avg: %.02f; stdev: %.02f, n=%d)", attr->val.avg, attr->val.stdev, attr->val.n); + } +#undef HANDLE_TYPE + + return buf; +} + + +static void +wprobe_dump_data(const char *ifname, struct list_head *gl, struct list_head *ll, struct list_head *ls) +{ + struct wprobe_attribute *attr; + struct wprobe_link *link; + bool first = true; + + fprintf(stderr, "\n"); + wprobe_request_data(ifname, gl, NULL, 2); + list_for_each_entry(attr, gl, list) { + fprintf(stderr, (first ? + "Global: %s=%s\n" : + " %s=%s\n"), + attr->name, + wprobe_dump_value(attr) + ); + first = false; + } + + list_for_each_entry(link, ls, list) { + first = true; + wprobe_request_data(ifname, ll, link->addr, 2); + list_for_each_entry(attr, ll, list) { + if (first) { + fprintf(stderr, + "%02x:%02x:%02x:%02x:%02x:%02x: %s=%s\n", + link->addr[0], link->addr[1], link->addr[2], + link->addr[3], link->addr[4], link->addr[5], + attr->name, + wprobe_dump_value(attr)); + first = false; + } else { + fprintf(stderr, + " %s=%s\n", + attr->name, + wprobe_dump_value(attr)); + } + } + } +} + +static const char *attr_typestr[] = { + [0] = "Unknown", + [WPROBE_VAL_STRING] = "String", + [WPROBE_VAL_U8] = "Unsigned 8 bit", + [WPROBE_VAL_U16] = "Unsigned 16 bit", + [WPROBE_VAL_U32] = "Unsigned 32 bit", + [WPROBE_VAL_U64] = "Unsigned 64 bit", + [WPROBE_VAL_S8] = "Signed 8 bit", + [WPROBE_VAL_S16] = "Signed 16 bit", + [WPROBE_VAL_S32] = "Signed 32 bit", + [WPROBE_VAL_S64] = "Signed 64 bit", +}; + +static int usage(const char *prog) +{ + fprintf(stderr, "Usage: %s <interface>\n", prog); + return 1; +} + +int main(int argc, char **argv) +{ + struct wprobe_attribute *attr; + const char *ifname; + LIST_HEAD(global_attr); + LIST_HEAD(link_attr); + LIST_HEAD(links); + int i = 0; + + if (argc < 2) + return usage(argv[0]); + + ifname = argv[1]; + + if (wprobe_init() != 0) + return -1; + + wprobe_dump_attributes(ifname, false, &global_attr, NULL); + wprobe_dump_attributes(ifname, true, &link_attr, NULL); + + if (list_empty(&global_attr) && + list_empty(&link_attr)) { + fprintf(stderr, "Interface '%s' not found\n", ifname); + return -1; + } + + list_for_each_entry(attr, &global_attr, list) { + fprintf(stderr, "Global attribute: '%s' (%s)\n", + attr->name, attr_typestr[attr->type]); + } + list_for_each_entry(attr, &link_attr, list) { + fprintf(stderr, "Link attribute: '%s' (%s)\n", + attr->name, attr_typestr[attr->type]); + } + + while (1) { + usleep(100 * 1000); + wprobe_measure(ifname); + + if (i-- > 0) + continue; + + i = 10; + wprobe_update_links(ifname, &links); + wprobe_dump_data(ifname, &global_attr, &link_attr, &links); + } + wprobe_free(); + + return 0; +} diff --git a/package/wprobe/src/user/wprobe.c b/package/wprobe/src/user/wprobe.c new file mode 100644 index 000000000..d591207da --- /dev/null +++ b/package/wprobe/src/user/wprobe.c @@ -0,0 +1,472 @@ +/* + * wprobe.c: Wireless probe user space library + * Copyright (C) 2008-2009 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 + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * 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 <errno.h> +#include <getopt.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <math.h> +#include <linux/wprobe.h> +#include <netlink/netlink.h> +#include <netlink/genl/genl.h> +#include <netlink/genl/ctrl.h> +#include <netlink/genl/family.h> +#include "wprobe.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 = NULL; +static struct nl_cache *cache = NULL; +static struct genl_family *family = NULL; +static struct nlattr *tb[WPROBE_ATTR_LAST+1]; +static struct nla_policy attribute_policy[WPROBE_ATTR_LAST+1] = { + [WPROBE_ATTR_ID] = { .type = NLA_U32 }, + [WPROBE_ATTR_MAC] = { .type = NLA_UNSPEC, .minlen = 6, .maxlen = 6 }, + [WPROBE_ATTR_NAME] = { .type = NLA_STRING }, + [WPROBE_ATTR_FLAGS] = { .type = NLA_U32 }, + [WPROBE_ATTR_TYPE] = { .type = NLA_U8 }, + [WPROBE_VAL_S8] = { .type = NLA_U8 }, + [WPROBE_VAL_S16] = { .type = NLA_U16 }, + [WPROBE_VAL_S32] = { .type = NLA_U32 }, + [WPROBE_VAL_S64] = { .type = NLA_U64 }, + [WPROBE_VAL_U8] = { .type = NLA_U8 }, + [WPROBE_VAL_U16] = { .type = NLA_U16 }, + [WPROBE_VAL_U32] = { .type = NLA_U32 }, + [WPROBE_VAL_U64] = { .type = NLA_U64 }, + [WPROBE_VAL_SUM] = { .type = NLA_U64 }, + [WPROBE_VAL_SUM_SQ] = { .type = NLA_U64 }, + [WPROBE_VAL_SAMPLES] = { .type = NLA_U32 }, +}; + +static int +error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) +{ + int *ret = arg; + *ret = err->error; + return NL_STOP; +} + +static int +finish_handler(struct nl_msg *msg, void *arg) +{ + int *ret = arg; + *ret = 0; + return NL_SKIP; +} + +static int +ack_handler(struct nl_msg *msg, void *arg) +{ + int *ret = arg; + *ret = 0; + return NL_STOP; +} + + +void +wprobe_free(void) +{ + if (cache) + nl_cache_free(cache); + if (handle) + nl_handle_destroy(handle); + handle = NULL; + cache = NULL; +} + +int +wprobe_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, "wprobe"); + if (!family) { + DPRINTF("wprobe API not present\n"); + goto err; + } + return 0; + +err: + wprobe_free(); + return -EINVAL; +} + + +static struct nl_msg * +wprobe_new_msg(const char *ifname, int cmd, bool dump) +{ + struct nl_msg *msg; + uint32_t flags = 0; + + msg = nlmsg_alloc(); + if (!msg) + return NULL; + + if (dump) + flags |= NLM_F_DUMP; + + genlmsg_put(msg, 0, 0, genl_family_get_id(family), + 0, flags, cmd, 0); + + NLA_PUT_STRING(msg, WPROBE_ATTR_INTERFACE, ifname); +nla_put_failure: + return msg; +} + +static int +wprobe_send_msg(struct nl_msg *msg, void *callback, void *arg) +{ + struct nl_cb *cb; + int err = 0; + + cb = nl_cb_alloc(NL_CB_DEFAULT); + if (!cb) + goto out_no_cb; + + if (callback) + nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, callback, arg); + + err = nl_send_auto_complete(handle, msg); + if (err < 0) + goto out; + + err = 1; + + nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err); + nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err); + nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err); + + while (err > 0) + nl_recvmsgs(handle, cb); + +out: + nl_cb_put(cb); +out_no_cb: + nlmsg_free(msg); + return err; +} + +struct wprobe_attr_cb { + struct list_head *list; + char *addr; +}; + +static int +save_attribute_handler(struct nl_msg *msg, void *arg) +{ + struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); + const char *name = "N/A"; + struct wprobe_attribute *attr; + int type = 0; + struct wprobe_attr_cb *cb = arg; + + nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0), + genlmsg_attrlen(gnlh, 0), attribute_policy); + + if (tb[WPROBE_ATTR_NAME]) + name = nla_data(tb[WPROBE_ATTR_NAME]); + + attr = malloc(sizeof(struct wprobe_attribute) + strlen(name) + 1); + if (!attr) + return -1; + + memset(attr, 0, sizeof(struct wprobe_attribute)); + + if (tb[WPROBE_ATTR_ID]) + attr->id = nla_get_u32(tb[WPROBE_ATTR_ID]); + + if (tb[WPROBE_ATTR_MAC] && cb->addr) + memcpy(cb->addr, nla_data(tb[WPROBE_ATTR_MAC]), 6); + + if (tb[WPROBE_ATTR_FLAGS]) + attr->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]); + + if (tb[WPROBE_ATTR_TYPE]) + type = nla_get_u8(tb[WPROBE_ATTR_TYPE]); + + if ((type < WPROBE_VAL_STRING) || + (type > WPROBE_VAL_U64)) + type = 0; + + attr->type = type; + strcpy(attr->name, name); + INIT_LIST_HEAD(&attr->list); + list_add(&attr->list, cb->list); + return 0; +} + + +int +wprobe_dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr) +{ + struct nl_msg *msg; + struct wprobe_attr_cb cb; + + cb.list = list; + cb.addr = addr; + msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_LIST, true); + if (!msg) + return -ENOMEM; + + if (link) + NLA_PUT(msg, WPROBE_ATTR_MAC, 6, "\x00\x00\x00\x00\x00\x00"); + + return wprobe_send_msg(msg, save_attribute_handler, &cb); + +nla_put_failure: + nlmsg_free(msg); + return -EINVAL; +} + +static struct wprobe_link * +get_link(struct list_head *list, const char *addr) +{ + struct wprobe_link *l; + + list_for_each_entry(l, list, list) { + if (!memcmp(l->addr, addr, 6)) { + list_del_init(&l->list); + goto out; + } + } + + /* no previous link found, allocate a new one */ + l = malloc(sizeof(struct wprobe_link)); + if (!l) + goto out; + + memset(l, 0, sizeof(struct wprobe_link)); + memcpy(l->addr, addr, sizeof(l->addr)); + INIT_LIST_HEAD(&l->list); + +out: + return l; +} + +struct wprobe_save_cb { + struct list_head *list; + struct list_head old_list; +}; + +static int +save_link_handler(struct nl_msg *msg, void *arg) +{ + struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); + struct wprobe_link *link; + struct wprobe_save_cb *cb = arg; + const char *addr; + + nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0), + genlmsg_attrlen(gnlh, 0), attribute_policy); + + if (!tb[WPROBE_ATTR_MAC] || (nla_len(tb[WPROBE_ATTR_MAC]) != 6)) + return -1; + + addr = nla_data(tb[WPROBE_ATTR_MAC]); + link = get_link(&cb->old_list, addr); + if (!link) + return -1; + + if (tb[WPROBE_ATTR_FLAGS]) + link->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]); + + list_add_tail(&link->list, cb->list); + return 0; +} + + +int +wprobe_update_links(const char *ifname, struct list_head *list) +{ + struct wprobe_link *l, *tmp; + struct nl_msg *msg; + struct wprobe_save_cb cb; + int err; + + INIT_LIST_HEAD(&cb.old_list); + list_splice_init(list, &cb.old_list); + cb.list = list; + + msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_LINKS, true); + if (!msg) + return -ENOMEM; + + err = wprobe_send_msg(msg, save_link_handler, &cb); + if (err < 0) + return err; + + list_for_each_entry_safe(l, tmp, &cb.old_list, list) { + list_del(&l->list); + free(l); + } + + return 0; +} + +void +wprobe_measure(const char *ifname) +{ + struct nl_msg *msg; + + msg = wprobe_new_msg(ifname, WPROBE_CMD_MEASURE, false); + if (!msg) + return; + + wprobe_send_msg(msg, NULL, NULL); +} + +struct wprobe_request_cb { + struct list_head *list; + struct list_head old_list; + char *addr; +}; + +static int +save_attrdata_handler(struct nl_msg *msg, void *arg) +{ + struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); + struct wprobe_request_cb *cb = arg; + struct wprobe_attribute *attr; + int type, id; + + nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0), + genlmsg_attrlen(gnlh, 0), attribute_policy); + + if (!tb[WPROBE_ATTR_ID]) + return -1; + + if (!tb[WPROBE_ATTR_TYPE]) + return -1; + + id = nla_get_u32(tb[WPROBE_ATTR_ID]); + list_for_each_entry(attr, &cb->old_list, list) { + if (attr->id == id) + goto found; + } + /* not found */ + return -1; + +found: + list_del_init(&attr->list); + + type = nla_get_u8(tb[WPROBE_ATTR_TYPE]); + if (type != attr->type) { + DPRINTF("WARNING: type mismatch for %s attribute '%s' (%d != %d)\n", + (cb->addr ? "link" : "global"), + attr->name, + type, attr->type); + goto out; + } + + if ((type < WPROBE_VAL_STRING) || + (type > WPROBE_VAL_U64)) + goto out; + + memset(&attr->val, 0, sizeof(attr->val)); + +#define HANDLE_INT_TYPE(_idx, _type) \ + case WPROBE_VAL_S##_type: \ + case WPROBE_VAL_U##_type: \ + attr->val.U##_type = nla_get_u##_type(tb[_idx]); \ + break + + switch(type) { + HANDLE_INT_TYPE(type, 8); + HANDLE_INT_TYPE(type, 16); + HANDLE_INT_TYPE(type, 32); + HANDLE_INT_TYPE(type, 64); + case WPROBE_VAL_STRING: + /* unimplemented */ + break; + } +#undef HANDLE_TYPE + + if (attr->flags & WPROBE_F_KEEPSTAT) { + if (tb[WPROBE_VAL_SUM]) + attr->val.s = nla_get_u64(tb[WPROBE_VAL_SUM]); + + if (tb[WPROBE_VAL_SUM_SQ]) + attr->val.ss = nla_get_u64(tb[WPROBE_VAL_SUM_SQ]); + + if (tb[WPROBE_VAL_SAMPLES]) + attr->val.n = nla_get_u32(tb[WPROBE_VAL_SAMPLES]); + + if (attr->val.n > 0) { + float avg = ((float) attr->val.s) / attr->val.n; + float stdev = sqrt((((float) attr->val.ss) / attr->val.n) - (avg * avg)); + attr->val.avg = avg; + attr->val.stdev = stdev; + } + } + +out: + list_add_tail(&attr->list, cb->list); + return 0; +} + + +int +wprobe_request_data(const char *ifname, struct list_head *attrs, const unsigned char *addr, int scale) +{ + struct wprobe_request_cb cb; + struct nl_msg *msg; + int err; + + msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_INFO, true); + if (!msg) + return -ENOMEM; + + if (scale < 0) + NLA_PUT_U32(msg, WPROBE_ATTR_FLAGS, WPROBE_F_RESET); + else if (scale > 0) + NLA_PUT_U32(msg, WPROBE_ATTR_SCALE, scale); + + if (addr) + NLA_PUT(msg, WPROBE_ATTR_MAC, 6, addr); + +nla_put_failure: + INIT_LIST_HEAD(&cb.old_list); + list_splice_init(attrs, &cb.old_list); + cb.list = attrs; + + err = wprobe_send_msg(msg, save_attrdata_handler, &cb); + list_splice(&cb.old_list, attrs->prev); + return err; +} + + diff --git a/package/wprobe/src/user/wprobe.h b/package/wprobe/src/user/wprobe.h new file mode 100644 index 000000000..e0c33faef --- /dev/null +++ b/package/wprobe/src/user/wprobe.h @@ -0,0 +1,143 @@ +/* + * wprobe.h: Wireless probe user space library + * Copyright (C) 2008-2009 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 + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * 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. + */ + +#ifndef __WPROBE_USER_H +#define __WPROBE_USER_H +#include <inttypes.h> +#include <stdint.h> +#include <stdbool.h> +#include "list.h" + +/** + * struct wprobe_value: data structure for attribute values + * @STRING: string value (currently unsupported) + * @U8: unsigned 8-bit integer value + * @U16: unsigned 16-bit integer value + * @U32: unsigned 32-bit integer value + * @U64: unsigned 64-bit integer value + * @S8: signed 8-bit integer value + * @S16: signed 16-bit integer value + * @S32: signed 32-bit integer value + * @S64: signed 64-bit integer value + * + * @n: number of sample values + * @avg: average value + * @stdev: standard deviation + * @s: sum of all sample values (internal use) + * @ss: sum of all sample values squared (internal use) + */ +struct wprobe_value { + /* attribute value */ + union { + const char *STRING; + uint8_t U8; + uint16_t U16; + uint32_t U32; + uint64_t U64; + int8_t S8; + int16_t S16; + int32_t S32; + int64_t S64; + }; + /* statistics */ + int64_t s, ss; + float avg, stdev; + unsigned int n; +}; + +/** + * struct wprobe_attribute: data structures for attribute descriptions + * @list: linked list data structure for a list of attributes + * @id: attribute id + * @type: netlink type for the attribute (see kernel api documentation) + * @flags: attribute flags (see kernel api documentation) + * @val: cached version of the last netlink query, will be overwritten on each request + * @name: attribute name + */ +struct wprobe_attribute { + struct list_head list; + int id; + int type; + uint32_t flags; + struct wprobe_value val; + char name[]; +}; + +/** + * struct wprobe_link: data structure for the link description + * @list: linked list data structure for a list of links + * @flags: link flags (see kernel api documentation) + * @addr: mac address of the remote link partner + */ +struct wprobe_link { + struct list_head list; + uint32_t flags; + unsigned char addr[6]; +}; + +/** + * wprobe_init: initialize internal data structures and connect to the wprobe netlink api + */ +extern int wprobe_init(void); + +/** + * wprobe_free: free all internally allocated data structures + */ +extern void wprobe_free(void); + +/** + * wprobe_update_links: get a list of all link partners + * @ifname: name of the wprobe interface + * @list: linked list for storing link descriptions + * + * when wprobe_update_links is called multiple times, the linked list + * is updated with new link partners, old entries are automatically expired + */ +extern int wprobe_update_links(const char *ifname, struct list_head *list); + +/** + * wprobe_measure: start a measurement request for all global attributes + * @ifname: name of the wprobe interface + * + * not all attributes are automatically filled with data, since for some + * it may be desirable to control the sampling interval from user space + * you can use this function to do that. + */ +extern void wprobe_measure(const char *ifname); + +/** + * wprobe_dump_attributes: create a linked list of available attributes + * @ifname: name of the wprobe interface + * @link: false: get the list of global attributes; true: get the list of per-link attributes + * @list: linked list to store the attributes in + * @addr: buffer to store the interface's mac address in (optional) + * + * attributes must be freed by the caller + */ +extern int wprobe_dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr); + +/** + * wprobe_request_data: request new sampling values for the given list of attributes + * @ifname: name of the wprobe interface + * @attrs: attribute list + * @addr: (optional) mac address of the link partner + * @scale: scale down values by a factor (scale < 0: reset statistics entirely) + * + * if addr is unset, attrs must point to the list of global attributes, + * if addr is set, attrs must point to the list of per-link attributes + */ +extern int wprobe_request_data(const char *ifname, struct list_head *attrs, const unsigned char *addr, int scale); + +#endif |