owipcalc/src/owipcalc.c

36 	} addr;
114 	struct cidr *addr = malloc(sizeof(struct cidr));
116 	if (!addr || (strlen(s) >= sizeof(addr->buf.v4)))
119 	snprintf(addr->buf.v4, sizeof(addr->buf.v4), "%s", s);
121 	addr->family = AF_INET;
123 	if ((p = strchr(addr->buf.v4, '/')) != NULL)
132 			for (addr->prefix = 0; mask.s_addr; mask.s_addr >>= 1)
133 				addr->prefix += (mask.s_addr & 1);
137 			addr->prefix = strtoul(p, &r, 10);
139 			if ((p == r) || (*r != 0) || (addr->prefix > 32))
145 		addr->prefix = 32;
148 	if (p == addr->buf.v4+1)
149 		memset(&addr->addr.v4, 0, sizeof(addr->addr.v4));
150 	else if (inet_pton(AF_INET, addr->buf.v4, &addr->addr.v4) != 1)
153 	return addr;
156 	if (addr)
157 		free(addr);
164 	uint32_t x = ntohl(a->addr.v4.s_addr);
165 	uint32_t y = ntohl(b->addr.v4.s_addr);
178 	n->addr.v4.s_addr = htonl(x + y);
184 	uint32_t x = ntohl(a->addr.v4.s_addr);
185 	uint32_t y = ntohl(b->addr.v4.s_addr);
198 	n->addr.v4.s_addr = htonl(x - y);
206 	n->addr.v4.s_addr &= htonl(~((1 << (32 - n->prefix)) - 1));
216 	n->addr.v4.s_addr |= htonl(((1 << (32 - n->prefix)) - 1));
224 	uint32_t net1 = a->addr.v4.s_addr & htonl(~((1 << (32 - a->prefix)) - 1));
225 	uint32_t net2 = b->addr.v4.s_addr & htonl(~((1 << (32 - a->prefix)) - 1));
246 	n->addr.v4.s_addr = htonl(~((1 << (32 - n->prefix)) - 1));
254 	uint32_t x = ntohl(a->addr.v4.s_addr);
275 	uint32_t x = ntohl(a->addr.v4.s_addr);
297 	n->addr.v4.s_addr -= htonl(1 << (32 - b->prefix));
307 	n->addr.v4.s_addr += htonl(1 << (32 - b->prefix));
315 	uint32_t x = a->addr.v4.s_addr;
317 	memset(&n->addr.v6.s6_addr, 0, sizeof(n->addr.v6.s6_addr));
322 	n->addr.v6.s6_addr[0] = 0x20;
323 	n->addr.v6.s6_addr[1] = 0x02;
324 	n->addr.v6.s6_addr[2] = (x >> 24);
325 	n->addr.v6.s6_addr[3] = (x >> 16) & 0xFF;
326 	n->addr.v6.s6_addr[4] = (x >>  8) & 0xFF;
327 	n->addr.v6.s6_addr[5] = x & 0xFF;
339 	if (!(p = (char *)inet_ntop(AF_INET, &a->addr.v4, a->buf.v4, sizeof(a->buf.v4))))
359 	struct cidr *addr = malloc(sizeof(struct cidr));
361 	if (!addr || (strlen(s) >= sizeof(addr->buf.v6)))
364 	snprintf(addr->buf.v4, sizeof(addr->buf.v6), "%s", s);
366 	addr->family = AF_INET6;
368 	if ((p = strchr(addr->buf.v4, '/')) != NULL)
372 		addr->prefix = strtoul(p, &r, 10);
374 		if ((p == r) || (*r != 0) || (addr->prefix > 128))
379 		addr->prefix = 128;
382 	if (p == addr->buf.v4+1)
383 		memset(&addr->addr.v6, 0, sizeof(addr->addr.v6));
384 	else if (inet_pton(AF_INET6, addr->buf.v4, &addr->addr.v6) != 1)
387 	return addr;
390 	if (addr)
391 		free(addr);
401 	struct in6_addr *x = &n->addr.v6;
402 	struct in6_addr *y = &b->addr.v6;
428 	struct in6_addr *x = &n->addr.v6;
429 	struct in6_addr *y = &b->addr.v6;
454 	struct in6_addr *x = &n->addr.v6;
486 	struct in6_addr *x = &n->addr.v6;
520 		n->addr.v6.s6_addr[15-i] = 0;
523 		n->addr.v6.s6_addr[15-i] &= ~((1 << ((128 - n->prefix) % 8)) - 1);
531 	struct in6_addr *x = &n->addr.v6;
532 	struct in6_addr *y = &b->addr.v6;
559 	if ((a->addr.v6.s6_addr[0] == 0xFE) &&
560 	    (a->addr.v6.s6_addr[1] >= 0x80) &&
561 	    (a->addr.v6.s6_addr[1] <= 0xBF))
578 	if ((a->addr.v6.s6_addr[0] >= 0xFC) &&
579 	    (a->addr.v6.s6_addr[0] <= 0xFD))
598 	if (!(p = (char *)inet_ntop(AF_INET6, &a->addr.v6, a->buf.v6, sizeof(a->buf.v6))))
634 			a->addr.v4.s_addr = htonl(sum);
643 				a->addr.v6.s6_addr[15-i] = sum % 256;