Annotation of embedtools/src/vap.c, revision 1.2
1.2 ! misho 1: #include "global.h"
! 2: #include "dwds.h"
! 3:
! 4:
! 5: static inline int
! 6: wifi_getParent(const char *csVAP, char *psParent, size_t plen)
! 7: {
! 8: char szOID[STRSIZ] = { 0 };
! 9:
! 10: FTRACE(5);
! 11:
! 12: assert(csVAP);
! 13: assert(psParent);
! 14:
! 15: memset(psParent, 0, plen);
! 16: snprintf(szOID, STRSIZ, "net.wlan.%s.%%parent", csVAP + 4);
! 17: if (sysctlbyname(szOID, psParent, &plen, NULL, 0) == -1) {
! 18: // syslog(LOG_ERR, "Error:: can`t get parent #%d - %s\n", errno, strerror(errno));
! 19: return -1;
! 20: } else
! 21: psParent[plen] = 0;
! 22:
! 23: return 0;
! 24: }
! 25:
! 26: inline int
! 27: wifi_chkIface(const char *csVAP, char **ppsIF, int nIF)
! 28: {
! 29: char szParent[IFNAMSIZ];
! 30: register int i;
! 31:
! 32: FTRACE(5);
! 33:
! 34: assert(csVAP);
! 35:
! 36: if (wifi_getParent(csVAP, szParent, IFNAMSIZ) == -1)
! 37: return 0;
! 38:
! 39: for (i = 0; i < nIF; i++)
! 40: if (!strcasecmp(ppsIF[i], "any") || !strcmp(ppsIF[i], szParent))
! 41: return 1; /* OK, vap is child */
! 42:
! 43: VERB(2) syslog(LOG_ERR, "Error:: Interface %s parent %s not being monitored", csVAP, szParent);
! 44: return 0;
! 45: }
! 46:
! 47: static inline int
! 48: wifi_isWDS(int fd, const char *csVAP)
! 49: {
! 50: struct ifmediareq ifmr;
! 51:
! 52: FTRACE(5);
! 53:
! 54: assert(csVAP);
! 55:
! 56: memset(&ifmr, 0, sizeof ifmr);
! 57: strlcpy(ifmr.ifm_name, csVAP, sizeof ifmr.ifm_name);
! 58: if (ioctl(fd, SIOCGIFMEDIA, &ifmr) == -1) {
! 59: syslog(LOG_ERR, "Error:: can`t get media for %s #%d - %s\n", csVAP,
! 60: errno, strerror(errno));
! 61: return -1;
! 62: }
! 63:
! 64: return (ifmr.ifm_current & IFM_IEEE80211_WDS) != 0;
! 65: }
! 66:
! 67: static inline int
! 68: wifi_getBSSID(int fd, const char *csVAP, uint8_t *psBSSID, int len)
! 69: {
! 70: struct ieee80211req ireq;
! 71:
! 72: FTRACE(5);
! 73:
! 74: assert(csVAP);
! 75: assert(psBSSID);
! 76:
! 77: memset(&ireq, 0, sizeof ireq);
! 78: strlcpy(ireq.i_name, csVAP, sizeof ireq.i_name);
! 79: ireq.i_type = IEEE80211_IOC_BSSID;
! 80: ireq.i_data = psBSSID;
! 81: ireq.i_len = len;
! 82: if (ioctl(fd, SIOCG80211, &ireq) == -1) {
! 83: syslog(LOG_ERR, "Error:: can`t get BSSID for %s #%d - %s\n", csVAP,
! 84: errno, strerror(errno));
! 85: return -1;
! 86: }
! 87:
! 88: return 0;
! 89: }
! 90:
! 91: struct dwds_if *
! 92: wifi_buildWDS(int fd, char **ppsIF, int nIF)
! 93: {
! 94: struct dwds_if *p, *wds = NULL;
! 95: char szVAP[IFNAMSIZ];
! 96: struct ether_addr bssid;
! 97: register int i;
! 98:
! 99: FTRACE(5);
! 100:
! 101: for (i = 0; i < 128; i++) {
! 102: memset(szVAP, 0, IFNAMSIZ);
! 103: snprintf(szVAP, IFNAMSIZ, "wlan%d", i);
! 104: if (wifi_chkIface(szVAP, ppsIF, nIF) && !wifi_isWDS(fd, szVAP)) {
! 105: p = malloc(sizeof(struct dwds_if));
! 106: if (!p) {
! 107: syslog(LOG_ERR, "Error:: can`t allocate memory #%d - %s\n",
! 108: errno, strerror(errno));
! 109: i = -1;
! 110: break;
! 111: }
! 112: strlcpy(p->if_name, szVAP, IFNAMSIZ);
! 113: if (wifi_getBSSID(fd, szVAP, p->if_bssid, IEEE80211_ADDR_LEN) == -1) {
! 114: syslog(LOG_ERR, "Error:: can`t get BSSID #%d - %s\n",
! 115: errno, strerror(errno));
! 116: i = -1;
! 117: break;
! 118: }
! 119: p->if_next = wds;
! 120: wds = p;
! 121:
! 122: memcpy(&bssid, p->if_bssid, ETHER_ADDR_LEN);
! 123: syslog(LOG_INFO, "BSSID:%s discover WDS vap %s\n", ether_ntoa(&bssid), szVAP);
! 124: }
! 125: }
! 126:
! 127: if (i == -1)
! 128: while ((p = wds)) {
! 129: wds = wds->if_next;
! 130: free(p);
! 131: }
! 132:
! 133: return wds;
! 134: }
! 135:
! 136: inline int
! 137: wifi_destroyWDS(const char *csIface, struct dwds_if **wds)
! 138: {
! 139: struct dwds_if *p, **pp;
! 140:
! 141: FTRACE(5);
! 142:
! 143: assert(csIface);
! 144: assert(wds);
! 145:
! 146: for (pp = wds; (p = *pp); pp = &p->if_next)
! 147: if (!strncmp(p->if_name, csIface, IFNAMSIZ))
! 148: break;
! 149: if (p) {
! 150: *pp = p->if_next;
! 151: free(p);
! 152: return 0;
! 153: }
! 154:
! 155: return 1;
! 156: }
! 157:
! 158: static int
! 159: wifi_vapDestroy(const char *csVAP)
! 160: {
! 161: struct ieee80211req ifr;
! 162: int s;
! 163:
! 164: FTRACE(5);
! 165:
! 166: assert(csVAP);
! 167:
! 168: s = socket(PF_INET, SOCK_DGRAM, 0);
! 169: if (s == -1) {
! 170: syslog(LOG_ERR, "Error:: destroy socket(vap) %m\n");
! 171: return -1;
! 172: }
! 173:
! 174: memset(&ifr, 0, sizeof ifr);
! 175: strlcpy(ifr.i_name, csVAP, IFNAMSIZ);
! 176: if (ioctl(s, SIOCIFDESTROY, &ifr) == -1) {
! 177: syslog(LOG_ERR, "Error:: destroy ioctl(vap) %m\n");
! 178: close(s);
! 179: return -1;
! 180: } else
! 181: close(s);
! 182:
! 183: return 0;
! 184: }
! 185:
! 186: inline int
! 187: wifi_leaveWDS(struct ether_addr bssid, struct dwds_if **wds, char *psVAP, int vapLen)
! 188: {
! 189: struct dwds_if *p, **pp;
! 190:
! 191: FTRACE(5);
! 192:
! 193: assert(wds);
! 194: assert(psVAP);
! 195:
! 196: for (pp = wds; (p = *pp); pp = &p->if_next)
! 197: if (!memcmp(p->if_bssid, &bssid, IEEE80211_ADDR_LEN))
! 198: break;
! 199: if (p) {
! 200: *pp = p->if_next;
! 201: strlcpy(psVAP, p->if_name, vapLen);
! 202: if (wifi_vapDestroy(p->if_name) != -1)
! 203: VERB(1) syslog(LOG_INFO, "BSSID:%s WDS VAP %s destroyed\n",
! 204: ether_ntoa(&bssid), p->if_name);
! 205: free(p);
! 206: return 0;
! 207: }
! 208:
! 209: return 1;
! 210: }
! 211:
! 212: static int
! 213: wifi_vapCreate(const char *csIface, struct dwds_if *p)
! 214: {
! 215: struct ieee80211_clone_params cp;
! 216: struct ifreq ifr;
! 217: struct ether_addr bssid;
! 218: int s;
! 219:
! 220: FTRACE(5);
! 221:
! 222: assert(csIface);
! 223: assert(p);
! 224:
! 225: s = socket(PF_INET, SOCK_DGRAM, 0);
! 226: if (s == -1) {
! 227: syslog(LOG_ERR, "Error:: create socket(vap) %m\n");
! 228: return -1;
! 229: }
! 230:
! 231: memset(&cp, 0, sizeof cp);
! 232: strlcpy(cp.icp_parent, csIface, IFNAMSIZ);
! 233: cp.icp_opmode = IEEE80211_M_WDS;
! 234: memcpy(cp.icp_bssid, p->if_bssid, IEEE80211_ADDR_LEN);
! 235:
! 236: memset(&ifr, 0, sizeof ifr);
! 237: strlcpy(ifr.ifr_name, "wlan", IFNAMSIZ);
! 238: ifr.ifr_data = (void *) &cp;
! 239:
! 240: if (ioctl(s, SIOCIFCREATE2, &ifr) == -1) {
! 241: memcpy(&bssid, cp.icp_bssid, IEEE80211_ADDR_LEN);
! 242: syslog(LOG_ERR, "Error:: create ioctl(vap) mode %u flags 0x%x parent %s bssid %s %m\n",
! 243: cp.icp_opmode, cp.icp_flags, cp.icp_parent, ether_ntoa(&bssid));
! 244: close(s);
! 245: return -1;
! 246: } else {
! 247: strlcpy(p->if_name, ifr.ifr_name, IFNAMSIZ);
! 248: close(s);
! 249: }
! 250:
! 251: return 0;
! 252: }
! 253:
! 254: inline int
! 255: wifi_createWDS(const char *csIface, struct ether_addr bssid, struct dwds_if **wds)
! 256: {
! 257: struct dwds_if *p;
! 258: char szParent[IFNAMSIZ];
! 259:
! 260: FTRACE(5);
! 261:
! 262: assert(csIface);
! 263: assert(wds);
! 264:
! 265: for (p = *wds; p; p = p->if_next)
! 266: if (!memcmp(p->if_bssid, &bssid, IEEE80211_ADDR_LEN)) {
! 267: VERB(1) syslog(LOG_INFO, "BSSID:%s WDS VAP already created (%s)\n",
! 268: ether_ntoa(&bssid), csIface);
! 269: return 1;
! 270: }
! 271: if (wifi_getParent(csIface, szParent, IFNAMSIZ) == -1) {
! 272: syslog(LOG_ERR, "Error:: %s no pointer to parent interface\n", csIface);
! 273: return -1;
! 274: }
! 275:
! 276: p = malloc(sizeof(struct dwds_if));
! 277: if (!p) {
! 278: syslog(LOG_ERR, "Error:: malloc failed: %m\n");
! 279: return -1;
! 280: } else
! 281: memcpy(p->if_bssid, &bssid, IEEE80211_ADDR_LEN);
! 282: if (wifi_vapCreate(szParent, p) == -1) {
! 283: free(p);
! 284: return -1;
! 285: } else {
! 286: p->if_next = *wds;
! 287: *wds = p;
! 288: VERB(1) syslog(LOG_INFO, "BSSID:%s create WDS VAP %s\n", ether_ntoa(&bssid), p->if_name);
! 289: }
! 290:
! 291: return 0;
! 292: }
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