298 lines
6.5 KiB
C
298 lines
6.5 KiB
C
/*
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* Wireless network adapter utilities
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*
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* Copyright 2006, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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*
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <linux/types.h>
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typedef u_int64_t u64;
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typedef u_int32_t u32;
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typedef u_int16_t u16;
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typedef u_int8_t u8;
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#include <linux/sockios.h>
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#include <linux/ethtool.h>
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#include <typedefs.h>
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#include <wlioctl.h>
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#include <bcmutils.h>
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#include <wlutils.h>
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int
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wl_ioctl(char *name, int cmd, void *buf, int len)
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{
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struct ifreq ifr;
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wl_ioctl_t ioc;
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int ret = 0;
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int s;
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/* open socket to kernel */
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if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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perror("socket");
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return errno;
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}
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/* do it */
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ioc.cmd = cmd;
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ioc.buf = buf;
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ioc.len = len;
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strncpy(ifr.ifr_name, name, IFNAMSIZ);
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ifr.ifr_data = (caddr_t) &ioc;
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if ((ret = ioctl(s, SIOCDEVPRIVATE, &ifr)) < 0)
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/* cleanup */
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close(s);
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return ret;
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}
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static inline int
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wl_get_dev_type(char *name, void *buf, int len)
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{
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int s;
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int ret;
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struct ifreq ifr;
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struct ethtool_drvinfo info;
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/* open socket to kernel */
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if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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perror("socket");
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return -1;
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}
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/* get device type */
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memset(&info, 0, sizeof(info));
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info.cmd = ETHTOOL_GDRVINFO;
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ifr.ifr_data = (caddr_t)&info;
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strncpy(ifr.ifr_name, name, IFNAMSIZ);
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if ((ret = ioctl(s, SIOCETHTOOL, &ifr)) < 0) {
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*(char *)buf = '\0';
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} else
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strncpy(buf, info.driver, len);
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close(s);
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return ret;
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}
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int
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wl_probe(char *name)
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{
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int ret, val;
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char buf[3];
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if ((ret = wl_get_dev_type(name, buf, 3)) < 0)
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return ret;
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/* Check interface */
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if (strncmp(buf, "wl", 2))
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return -1;
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if ((ret = wl_ioctl(name, WLC_GET_VERSION, &val, sizeof(val))))
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return ret;
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if (val > WLC_IOCTL_VERSION)
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return -1;
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return ret;
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}
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static int
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wl_iovar_getbuf(char *ifname, char *iovar, void *param, int paramlen, void *bufptr, int buflen)
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{
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int err;
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uint namelen;
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uint iolen;
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namelen = strlen(iovar) + 1; /* length of iovar name plus null */
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iolen = namelen + paramlen;
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/* check for overflow */
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if (iolen > buflen)
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return (BCME_BUFTOOSHORT);
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memcpy(bufptr, iovar, namelen); /* copy iovar name including null */
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memcpy((int8*)bufptr + namelen, param, paramlen);
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err = wl_ioctl(ifname, WLC_GET_VAR, bufptr, buflen);
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return (err);
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}
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static int
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wl_iovar_setbuf(char *ifname, char *iovar, void *param, int paramlen, void *bufptr, int buflen)
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{
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uint namelen;
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uint iolen;
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namelen = strlen(iovar) + 1; /* length of iovar name plus null */
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iolen = namelen + paramlen;
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/* check for overflow */
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if (iolen > buflen)
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return (BCME_BUFTOOSHORT);
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memcpy(bufptr, iovar, namelen); /* copy iovar name including null */
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memcpy((int8*)bufptr + namelen, param, paramlen);
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return wl_ioctl(ifname, WLC_SET_VAR, bufptr, iolen);
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}
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int
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wl_iovar_set(char *ifname, char *iovar, void *param, int paramlen)
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{
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char smbuf[WLC_IOCTL_SMLEN];
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return wl_iovar_setbuf(ifname, iovar, param, paramlen, smbuf, sizeof(smbuf));
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}
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int
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wl_iovar_get(char *ifname, char *iovar, void *bufptr, int buflen)
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{
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char smbuf[WLC_IOCTL_SMLEN];
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int ret;
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/* use the return buffer if it is bigger than what we have on the stack */
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if (buflen > sizeof(smbuf)) {
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ret = wl_iovar_getbuf(ifname, iovar, NULL, 0, bufptr, buflen);
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} else {
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ret = wl_iovar_getbuf(ifname, iovar, NULL, 0, smbuf, sizeof(smbuf));
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if (ret == 0)
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memcpy(bufptr, smbuf, buflen);
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}
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return ret;
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}
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/*
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* format a bsscfg indexed iovar buffer
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*/
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static int
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wl_bssiovar_mkbuf(char *iovar, int bssidx, void *param, int paramlen, void *bufptr, int buflen,
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int *plen)
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{
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char *prefix = "bsscfg:";
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int8* p;
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uint prefixlen;
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uint namelen;
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uint iolen;
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prefixlen = strlen(prefix); /* length of bsscfg prefix */
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namelen = strlen(iovar) + 1; /* length of iovar name + null */
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iolen = prefixlen + namelen + sizeof(int) + paramlen;
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/* check for overflow */
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if (buflen < 0 || iolen > (uint)buflen) {
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*plen = 0;
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return BCME_BUFTOOSHORT;
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}
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p = (int8*)bufptr;
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/* copy prefix, no null */
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memcpy(p, prefix, prefixlen);
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p += prefixlen;
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/* copy iovar name including null */
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memcpy(p, iovar, namelen);
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p += namelen;
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/* bss config index as first param */
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memcpy(p, &bssidx, sizeof(int32));
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p += sizeof(int32);
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/* parameter buffer follows */
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if (paramlen)
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memcpy(p, param, paramlen);
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*plen = iolen;
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return 0;
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}
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/*
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* set named & bss indexed driver variable to buffer value
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*/
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static int
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wl_bssiovar_setbuf(char *ifname, char *iovar, int bssidx, void *param, int paramlen, void *bufptr,
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int buflen)
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{
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int err;
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int iolen;
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err = wl_bssiovar_mkbuf(iovar, bssidx, param, paramlen, bufptr, buflen, &iolen);
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if (err)
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return err;
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return wl_ioctl(ifname, WLC_SET_VAR, bufptr, iolen);
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}
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/*
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* get named & bss indexed driver variable buffer value
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*/
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static int
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wl_bssiovar_getbuf(char *ifname, char *iovar, int bssidx, void *param, int paramlen, void *bufptr,
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int buflen)
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{
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int err;
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int iolen;
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err = wl_bssiovar_mkbuf(iovar, bssidx, param, paramlen, bufptr, buflen, &iolen);
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if (err)
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return err;
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return wl_ioctl(ifname, WLC_GET_VAR, bufptr, buflen);
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}
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/*
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* set named & bss indexed driver variable to buffer value
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*/
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int
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wl_bssiovar_set(char *ifname, char *iovar, int bssidx, void *param, int paramlen)
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{
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char smbuf[WLC_IOCTL_SMLEN];
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return wl_bssiovar_setbuf(ifname, iovar, bssidx, param, paramlen, smbuf, sizeof(smbuf));
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}
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/*
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* get named & bss indexed driver variable buffer value
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*/
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int
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wl_bssiovar_get(char *ifname, char *iovar, int bssidx, void *outbuf, int len)
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{
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char smbuf[WLC_IOCTL_SMLEN];
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int err;
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/* use the return buffer if it is bigger than what we have on the stack */
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if (len > (int)sizeof(smbuf)) {
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err = wl_bssiovar_getbuf(ifname, iovar, bssidx, NULL, 0, outbuf, len);
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} else {
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memset(smbuf, 0, sizeof(smbuf));
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err = wl_bssiovar_getbuf(ifname, iovar, bssidx, NULL, 0, smbuf, sizeof(smbuf));
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if (err == 0)
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memcpy(outbuf, smbuf, len);
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}
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return err;
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}
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void
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wl_printlasterror(char *name)
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{
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char err_buf[WLC_IOCTL_SMLEN];
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strcpy(err_buf, "bcmerrstr");
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fprintf(stderr, "Error: ");
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if ( wl_ioctl(name, WLC_GET_VAR, err_buf, sizeof (err_buf)) != 0)
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fprintf(stderr, "Error getting the Errorstring from driver\n");
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else
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fprintf(stderr, err_buf);
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}
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