Annotation of libelwix/src/net.c, revision 1.2.2.2

1.1       misho       1: /*************************************************************************
                      2: * (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
                      3: *  by Michael Pounov <misho@elwix.org>
                      4: *
                      5: * $Author: misho $
1.2.2.2 ! misho       6: * $Id: net.c,v 1.2.2.1 2013/06/03 11:41:45 misho Exp $
1.1       misho       7: *
                      8: **************************************************************************
                      9: The ELWIX and AITNET software is distributed under the following
                     10: terms:
                     11: 
                     12: All of the documentation and software included in the ELWIX and AITNET
                     13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
                     14: 
                     15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
                     16:        by Michael Pounov <misho@elwix.org>.  All rights reserved.
                     17: 
                     18: Redistribution and use in source and binary forms, with or without
                     19: modification, are permitted provided that the following conditions
                     20: are met:
                     21: 1. Redistributions of source code must retain the above copyright
                     22:    notice, this list of conditions and the following disclaimer.
                     23: 2. Redistributions in binary form must reproduce the above copyright
                     24:    notice, this list of conditions and the following disclaimer in the
                     25:    documentation and/or other materials provided with the distribution.
                     26: 3. All advertising materials mentioning features or use of this software
                     27:    must display the following acknowledgement:
                     28: This product includes software developed by Michael Pounov <misho@elwix.org>
                     29: ELWIX - Embedded LightWeight unIX and its contributors.
                     30: 4. Neither the name of AITNET nor the names of its contributors
                     31:    may be used to endorse or promote products derived from this software
                     32:    without specific prior written permission.
                     33: 
                     34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
                     35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     37: ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     44: SUCH DAMAGE.
                     45: */
                     46: #include "global.h"
                     47: 
                     48: 
                     49: /*
                     50:  * e_ether_ntoa() - Convert ethernet address to string
                     51:  *
                     52:  * @n = ethernet address structure, like struct ether_addr
                     53:  * @a = string
                     54:  * @len = string length
                     55:  * return: NULL error or !=NULL string a
                     56:  */
1.2       misho      57: char *
1.1       misho      58: e_ether_ntoa(const struct e_ether_addr *n, char * __restrict a, int len)
                     59: {
                     60:        if (!n || !a)
                     61:                return NULL;
                     62: 
                     63:        memset(a, 0, len);
                     64:        if (snprintf(a, len, "%02x:%02x:%02x:%02x:%02x:%02x", 
                     65:                        n->ether_addr_octet[0], n->ether_addr_octet[1], 
                     66:                        n->ether_addr_octet[2], n->ether_addr_octet[3], 
                     67:                        n->ether_addr_octet[4], n->ether_addr_octet[5]) < 17)
                     68:                return NULL;
                     69: 
                     70:        return a;
                     71: }
                     72: 
                     73: /*
                     74:  * e_ether_aton() - Convert string to ethernet address
                     75:  *
                     76:  * @a = string
                     77:  * @e = ethernet address structure, like struct ether_addr
                     78:  * return: NULL error or !=NULL ethernet address structure
                     79:  */
1.2       misho      80: struct e_ether_addr *
1.1       misho      81: e_ether_aton(const char *a, struct e_ether_addr *e)
                     82: {                       
                     83:        int i;
                     84:        u_int o0, o1, o2, o3, o4, o5;
                     85: 
                     86:        if (!a || !e)
                     87:                return NULL;
                     88: 
                     89:        i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o0, &o1, &o2, &o3, &o4, &o5);
                     90:        if (i != 6)
                     91:                return NULL;
                     92: 
                     93:        e->ether_addr_octet[0] = o0;
                     94:        e->ether_addr_octet[1] = o1;
                     95:        e->ether_addr_octet[2] = o2;
                     96:        e->ether_addr_octet[3] = o3;
                     97:        e->ether_addr_octet[4] = o4;
                     98:        e->ether_addr_octet[5] = o5;
                     99: 
                    100:        return e;
                    101: }
                    102: 
                    103: /*
                    104:  * e_n2port() - Extract port from network structure
                    105:  *
                    106:  * @addr = Address
                    107:  * return: 0 not supported family type or port number
                    108:  */
1.2       misho     109: u_short
1.1       misho     110: e_n2port(sockaddr_t * __restrict addr)
                    111: {
                    112:        u_short port = 0;
                    113: 
                    114:        if (!addr)
                    115:                return port;
                    116: 
                    117:        switch (addr->sa.sa_family) {
                    118:                case AF_INET:
                    119:                        return ntohs(addr->sin.sin_port);
                    120:                case AF_INET6:
                    121:                        return ntohs(addr->sin6.sin6_port);
                    122:                default:
                    123:                        break;
                    124:        }
                    125: 
                    126:        return port;
                    127: }
                    128: 
                    129: /*
                    130:  * e_n2addr() - Extract address from network structure
                    131:  *
                    132:  * @addr = Address
                    133:  * @val = Value for store string address
                    134:  * return: NULL error or !=NULL string address from val
                    135:  */
                    136: const char *
                    137: e_n2addr(sockaddr_t * __restrict addr, ait_val_t * __restrict val)
                    138: {
                    139:        char str[INET6_ADDRSTRLEN] = { 0 };
                    140:        const char *ret = NULL;
                    141: 
                    142:        if (!addr || !val)
                    143:                return ret;
                    144: 
                    145:        AIT_INIT_VAL(val);
                    146:        switch (addr->sa.sa_family) {
                    147:                case AF_INET:
                    148:                        if (!inet_ntop(AF_INET, &addr->sin.sin_addr, str, INET_ADDRSTRLEN)) {
                    149:                                LOGERR;
                    150:                                return ret;
                    151:                        } else
                    152:                                ret = str;
                    153:                        break;
                    154:                case AF_INET6:
                    155:                        if (!inet_ntop(AF_INET6, &addr->sin6.sin6_addr, str, INET6_ADDRSTRLEN)) {
                    156:                                LOGERR;
                    157:                                return ret;
                    158:                        } else
                    159:                                ret = str;
                    160:                        break;
                    161:                case AF_LOCAL:
                    162:                        ret = addr->sun.sun_path;
                    163:                        break;
                    164:                default:
                    165:                        elwix_SetErr(EPROTONOSUPPORT, "Unsuported address family %d", 
                    166:                                        addr->sa.sa_family);
                    167:                        return ret;
                    168:        }
                    169: 
                    170:        AIT_SET_STR(val, ret);
                    171:        return (const char*) AIT_GET_STR(val);
                    172: }
                    173: 
                    174: /*
                    175:  * e_gethostbyname() - Get host and port and make network structure
                    176:  *
                    177:  * @psHost = Hostname
                    178:  * @port = Port
                    179:  * @addr = Network address structure
                    180:  * return: NULL error or !=NULL network structure
                    181:  */
                    182: sockaddr_t *
                    183: e_gethostbyname(const char *psHost, u_short port, sockaddr_t * __restrict addr)
                    184: {
                    185:        struct hostent *host = NULL;
                    186: 
                    187:        if (!psHost || !addr)
                    188:                return NULL;
                    189: 
                    190:        if (*psHost != '/') {
                    191:                /* resolver */
                    192:                if (!addr->sa.sa_family)
                    193:                        host = gethostbyname(psHost);
                    194:                else
                    195:                        host = gethostbyname2(psHost, addr->sa.sa_family);
                    196:                if (!host) {
                    197:                        elwix_SetErr(EINVAL, "Resolver #%d - %s", h_errno, hstrerror(h_errno));
                    198:                        return NULL;
                    199:                } else {
                    200:                        memset(addr, 0, sizeof(sockaddr_t));
                    201:                        addr->sa.sa_family = host->h_addrtype;
                    202:                }
                    203:        } else {
                    204:                memset(addr, 0, sizeof(sockaddr_t));
                    205:                addr->sa.sa_family = AF_LOCAL;
                    206:        }
                    207:                
                    208: 
                    209:        switch (addr->sa.sa_family) {
                    210:                case AF_INET:
                    211:                        addr->sin.sin_len = sizeof(struct sockaddr_in);
                    212:                        addr->sin.sin_family = AF_INET;
                    213:                        addr->sin.sin_port = htons(port);
                    214:                        memcpy(&addr->sin.sin_addr, host->h_addr, sizeof addr->sin.sin_addr);
                    215:                        return addr;
                    216:                case AF_INET6:
                    217:                        addr->sin6.sin6_len = sizeof(struct sockaddr_in6);
                    218:                        addr->sin6.sin6_family = AF_INET6;
                    219:                        addr->sin6.sin6_port = htons(port);
                    220:                        memcpy(&addr->sin6.sin6_addr, host->h_addr, sizeof addr->sin6.sin6_addr);
                    221:                        return addr;
                    222:                case AF_LOCAL:
                    223:                        addr->sun.sun_len = sizeof(struct sockaddr_un);
                    224:                        addr->sun.sun_family = AF_LOCAL;
                    225:                        memset(addr->sun.sun_path, 0, sizeof addr->sun.sun_path);
                    226:                        snprintf(addr->sun.sun_path, sizeof addr->sun.sun_path, "%s-%hu", psHost, port);
                    227:                        return addr;
                    228:                default:
                    229:                        elwix_SetErr(EPROTONOSUPPORT, "Unsuported address family %d", addr->sa.sa_family);
                    230:                        break;
                    231:        }
                    232: 
                    233:        return NULL;
                    234: }
                    235: 
                    236: /*
                    237:  * e_addrcmp() - Compare network addresses
                    238:  *
                    239:  * @a = 1st address
                    240:  * @b = 2nd address
                    241:  * @p = compare and ports, if family is AF_INET or AF_INET6
                    242:  * return: 0 is equal or !=0 is different
                    243:  */
                    244: int
                    245: e_addrcmp(sockaddr_t * __restrict a, sockaddr_t * __restrict b, int p)
                    246: {
                    247:        if (a && b && a->sa.sa_family == b->sa.sa_family)
                    248:                switch (a->sa.sa_family) {
                    249:                        case AF_LOCAL:
                    250:                                return strcmp(a->sun.sun_path, b->sun.sun_path);
                    251:                        case AF_INET:
                    252:                                if (p && (a->sin.sin_port - b->sin.sin_port))
                    253:                                        return (int) !!(a->sin.sin_port - b->sin.sin_port);
                    254:                                else
                    255:                                        return memcmp(&a->sin.sin_addr, &b->sin.sin_addr, 
                    256:                                                        sizeof a->sin.sin_addr);
                    257:                        case AF_INET6:
                    258:                                if (p && (a->sin6.sin6_port - b->sin6.sin6_port))
                    259:                                        return (int) !!(a->sin6.sin6_port - b->sin6.sin6_port);
                    260:                                else
                    261:                                        return memcmp(&a->sin6.sin6_addr, &b->sin6.sin6_addr, 
                    262:                                                        sizeof a->sin6.sin6_addr);
                    263:                        case AF_LINK:
                    264:                                return memcmp(&a->sdl.sdl_data, &b->sdl.sdl_data, 
                    265:                                                sizeof a->sdl.sdl_data);
                    266:                }
                    267: 
                    268:        return (int) !!(a - b);
                    269: }
                    270: 
                    271: /*
                    272:  * e_usleep() - usleep() replacement for ELWIX
                    273:  *
                    274:  * @usec = microseconds for sleep
                    275:  * return: -1 interrupted by signal or 0 ok
                    276:  */
1.2       misho     277: int
1.1       misho     278: e_usleep(u_int usec)
                    279: {
                    280:        struct timeval tv = { (time_t) (usec / 1000000), (long) (usec % 1000000) };
                    281: 
                    282:        return select(0, NULL, NULL, NULL, &tv);
                    283: }
1.2.2.1   misho     284: 
                    285: /*
                    286:  * e_innet() - Test address match in network
                    287:  *
                    288:  * @net = network
                    289:  * @addr = address
                    290:  * return: -1 error, 0 match or 1 not match
                    291:  */
                    292: int
1.2.2.2 ! misho     293: e_innet(netaddr_t * __restrict net, inaddr_t * __restrict addr)
1.2.2.1   misho     294: {
                    295:        register int i;
                    296:        int ret = 0;
                    297: 
                    298:        if (!net || !addr)
                    299:                return -1;
                    300: 
                    301:        switch (net->addr.sa.sa_family) {
                    302:                case AF_INET:
                    303:                        ret = net->addr.sin.sin_addr.s_addr & net->mask.in.s_addr;
1.2.2.2 ! misho     304:                        ret -= addr->in.s_addr & net->mask.in.s_addr;
1.2.2.1   misho     305:                        break;
                    306:                case AF_INET6:
                    307:                        for (i = 0; i < sizeof(struct in6_addr); i++) {
                    308:                                ret = net->addr.sin6.sin6_addr.s6_addr[i] & net->mask.in6.s6_addr[i];
1.2.2.2 ! misho     309:                                ret -= addr->in6.s6_addr[i] & net->mask.in6.s6_addr[i];
1.2.2.1   misho     310:                                if (ret)
                    311:                                        break;
                    312:                        }
                    313:                        break;
                    314:                default:
                    315:                        return -1;
                    316:        }
                    317: 
                    318:        return !!ret;
                    319: }

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>