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/* $OpenBSD: util.c,v 1.6 2017/01/09 14:49:22 reyk Exp $ */ |
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/* |
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* Copyright (c) 2013-2016 Reyk Floeter <reyk@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <sys/un.h> |
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#include <net/if.h> |
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#include <net/if_arp.h> |
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#include <netinet/in.h> |
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#include <netinet/if_ether.h> |
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#include <netinet/tcp.h> |
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#include <unistd.h> |
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#include <netdb.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <fcntl.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <event.h> |
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#include "switchd.h" |
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void |
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socket_set_blockmode(int fd, enum blockmodes bm) |
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{ |
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int flags; |
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if ((flags = fcntl(fd, F_GETFL, 0)) == -1) |
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fatal("fcntl F_GETFL"); |
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if (bm == BM_NONBLOCK) |
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flags |= O_NONBLOCK; |
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else |
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flags &= ~O_NONBLOCK; |
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if ((flags = fcntl(fd, F_SETFL, flags)) == -1) |
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fatal("fcntl F_SETFL"); |
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} |
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int |
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accept4_reserve(int sockfd, struct sockaddr *addr, socklen_t *addrlen, |
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int flags, int reserve, volatile int *counter) |
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{ |
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int fd; |
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if (getdtablecount() + reserve + *counter >= getdtablesize()) { |
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errno = EMFILE; |
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return (-1); |
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} |
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if ((fd = accept4(sockfd, addr, addrlen, flags)) != -1) { |
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(*counter)++; |
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DPRINTF("%s: inflight incremented, now %d",__func__, *counter); |
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} |
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return (fd); |
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} |
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in_port_t |
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socket_getport(struct sockaddr_storage *ss) |
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{ |
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switch (ss->ss_family) { |
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case AF_INET: |
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return (ntohs(((struct sockaddr_in *)ss)->sin_port)); |
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case AF_INET6: |
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return (ntohs(((struct sockaddr_in6 *)ss)->sin6_port)); |
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default: |
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return (0); |
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} |
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/* NOTREACHED */ |
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return (0); |
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} |
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int |
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socket_setport(struct sockaddr_storage *ss, in_port_t port) |
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{ |
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switch (ss->ss_family) { |
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case AF_INET: |
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((struct sockaddr_in *)ss)->sin_port = ntohs(port); |
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return (0); |
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case AF_INET6: |
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((struct sockaddr_in6 *)ss)->sin6_port = ntohs(port); |
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return (0); |
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default: |
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return (-1); |
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} |
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/* NOTREACHED */ |
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return (-1); |
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} |
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int |
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sockaddr_cmp(struct sockaddr *a, struct sockaddr *b, int prefixlen) |
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{ |
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struct sockaddr_in *a4, *b4; |
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struct sockaddr_in6 *a6, *b6; |
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struct sockaddr_un *au, *bu; |
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uint32_t av[4], bv[4], mv[4]; |
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if (a->sa_family == AF_UNSPEC || b->sa_family == AF_UNSPEC) |
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return (0); |
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else if (a->sa_family > b->sa_family) |
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return (1); |
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else if (a->sa_family < b->sa_family) |
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return (-1); |
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if (prefixlen == -1) |
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memset(&mv, 0xff, sizeof(mv)); |
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switch (a->sa_family) { |
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case AF_INET: |
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a4 = (struct sockaddr_in *)a; |
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b4 = (struct sockaddr_in *)b; |
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av[0] = a4->sin_addr.s_addr; |
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bv[0] = b4->sin_addr.s_addr; |
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if (prefixlen != -1) |
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mv[0] = prefixlen2mask(prefixlen); |
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if ((av[0] & mv[0]) > (bv[0] & mv[0])) |
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return (1); |
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if ((av[0] & mv[0]) < (bv[0] & mv[0])) |
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return (-1); |
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break; |
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case AF_INET6: |
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a6 = (struct sockaddr_in6 *)a; |
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b6 = (struct sockaddr_in6 *)b; |
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memcpy(&av, &a6->sin6_addr.s6_addr, 16); |
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memcpy(&bv, &b6->sin6_addr.s6_addr, 16); |
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if (prefixlen != -1) |
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prefixlen2mask6(prefixlen, mv); |
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if ((av[3] & mv[3]) > (bv[3] & mv[3])) |
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return (1); |
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if ((av[3] & mv[3]) < (bv[3] & mv[3])) |
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return (-1); |
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if ((av[2] & mv[2]) > (bv[2] & mv[2])) |
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return (1); |
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if ((av[2] & mv[2]) < (bv[2] & mv[2])) |
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return (-1); |
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if ((av[1] & mv[1]) > (bv[1] & mv[1])) |
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return (1); |
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if ((av[1] & mv[1]) < (bv[1] & mv[1])) |
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return (-1); |
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if ((av[0] & mv[0]) > (bv[0] & mv[0])) |
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return (1); |
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if ((av[0] & mv[0]) < (bv[0] & mv[0])) |
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return (-1); |
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break; |
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case AF_UNIX: |
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au = (struct sockaddr_un *)a; |
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bu = (struct sockaddr_un *)b; |
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return (strcmp(au->sun_path, bu->sun_path)); |
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} |
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return (0); |
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} |
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uint32_t |
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prefixlen2mask(uint8_t prefixlen) |
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{ |
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if (prefixlen == 0) |
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return (0); |
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184 |
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if (prefixlen > 32) |
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prefixlen = 32; |
186 |
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return (htonl(0xffffffff << (32 - prefixlen))); |
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} |
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struct in6_addr * |
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prefixlen2mask6(uint8_t prefixlen, uint32_t *mask) |
192 |
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{ |
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static struct in6_addr s6; |
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int i; |
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196 |
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if (prefixlen > 128) |
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prefixlen = 128; |
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bzero(&s6, sizeof(s6)); |
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for (i = 0; i < prefixlen / 8; i++) |
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s6.s6_addr[i] = 0xff; |
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i = prefixlen % 8; |
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if (i) |
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s6.s6_addr[prefixlen / 8] = 0xff00 >> i; |
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206 |
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memcpy(mask, &s6, sizeof(s6)); |
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return (&s6); |
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} |
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const char * |
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print_ether(const uint8_t *ea) |
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{ |
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static char sbuf[SWITCHD_CYCLE_BUFFERS] |
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[ETHER_ADDR_LEN * 2 + 5 + 1]; |
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static int idx = 0; |
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size_t len; |
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char *buf; |
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buf = sbuf[idx]; |
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len = sizeof(sbuf[idx]); |
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if (++idx >= SWITCHD_CYCLE_BUFFERS) |
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idx = 0; |
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snprintf(buf, len, "%02x:%02x:%02x:%02x:%02x:%02x", |
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ea[0], ea[1], ea[2], ea[3], ea[4], ea[5]); |
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return (buf); |
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} |
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const char * |
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print_host(struct sockaddr_storage *ss, char *buf, size_t len) |
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{ |
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static char sbuf[SWITCHD_CYCLE_BUFFERS][NI_MAXHOST + 7]; |
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struct sockaddr_un *un; |
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static int idx = 0; |
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char pbuf[7]; |
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in_port_t port; |
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240 |
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if (buf == NULL) { |
241 |
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buf = sbuf[idx]; |
242 |
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len = sizeof(sbuf[idx]); |
243 |
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if (++idx >= SWITCHD_CYCLE_BUFFERS) |
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idx = 0; |
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} |
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247 |
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if (ss->ss_family == AF_UNSPEC) { |
248 |
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strlcpy(buf, "any", len); |
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return (buf); |
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} else if (ss->ss_family == AF_UNIX) { |
251 |
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un = (struct sockaddr_un *)ss; |
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strlcpy(buf, un->sun_path, len); |
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return (buf); |
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} |
255 |
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256 |
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if (getnameinfo((struct sockaddr *)ss, ss->ss_len, |
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buf, len, NULL, 0, NI_NUMERICHOST) != 0) { |
258 |
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buf[0] = '\0'; |
259 |
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return (NULL); |
260 |
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} |
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262 |
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if ((port = socket_getport(ss)) != 0) { |
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snprintf(pbuf, sizeof(pbuf), ":%d", port); |
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(void)strlcat(buf, pbuf, len); |
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} |
266 |
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267 |
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return (buf); |
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} |
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270 |
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const char * |
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print_map(unsigned int type, struct constmap *map) |
272 |
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{ |
273 |
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unsigned int i; |
274 |
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static char buf[SWITCHD_CYCLE_BUFFERS][32]; |
275 |
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static int idx = 0; |
276 |
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const char *name = NULL; |
277 |
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278 |
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if (idx >= SWITCHD_CYCLE_BUFFERS) |
279 |
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idx = 0; |
280 |
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bzero(buf[idx], sizeof(buf[idx])); |
281 |
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282 |
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for (i = 0; map[i].cm_name != NULL; i++) { |
283 |
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if (map[i].cm_type == type) { |
284 |
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name = map[i].cm_name; |
285 |
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break; |
286 |
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} |
287 |
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} |
288 |
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289 |
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if (name == NULL) |
290 |
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snprintf(buf[idx], sizeof(buf[idx]), "<%u>", type); |
291 |
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else |
292 |
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strlcpy(buf[idx], name, sizeof(buf[idx])); |
293 |
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294 |
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return (buf[idx++]); |
295 |
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} |
296 |
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297 |
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void |
298 |
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getmonotime(struct timeval *tv) |
299 |
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{ |
300 |
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struct timespec ts; |
301 |
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302 |
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if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
303 |
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fatal("clock_gettime"); |
304 |
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305 |
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TIMESPEC_TO_TIMEVAL(tv, &ts); |
306 |
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} |
307 |
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308 |
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void |
309 |
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print_debug(const char *emsg, ...) |
310 |
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{ |
311 |
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va_list ap; |
312 |
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313 |
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if (log_getverbose() > 2) { |
314 |
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va_start(ap, emsg); |
315 |
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vfprintf(stderr, emsg, ap); |
316 |
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va_end(ap); |
317 |
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} |
318 |
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} |
319 |
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320 |
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void |
321 |
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print_verbose(const char *emsg, ...) |
322 |
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{ |
323 |
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va_list ap; |
324 |
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325 |
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if (log_getverbose()) { |
326 |
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va_start(ap, emsg); |
327 |
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vfprintf(stderr, emsg, ap); |
328 |
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va_end(ap); |
329 |
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} |
330 |
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} |
331 |
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332 |
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void |
333 |
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print_hex(uint8_t *buf, off_t offset, size_t length) |
334 |
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{ |
335 |
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unsigned int i; |
336 |
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|
337 |
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if (log_getverbose() < 3 || !length) |
338 |
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return; |
339 |
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|
340 |
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for (i = 0; i < length; i++) { |
341 |
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if (i && (i % 4) == 0) { |
342 |
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if ((i % 32) == 0) |
343 |
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print_debug("\n"); |
344 |
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else |
345 |
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print_debug(" "); |
346 |
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} |
347 |
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print_debug("%02x", buf[offset + i]); |
348 |
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} |
349 |
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print_debug("\n"); |
350 |
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} |
351 |
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|
352 |
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int |
353 |
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parsehostport(const char *str, struct sockaddr *sa, socklen_t salen) |
354 |
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{ |
355 |
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char buf[NI_MAXHOST + NI_MAXSERV + 8], *servp, *nodep; |
356 |
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struct addrinfo hints, *ai; |
357 |
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358 |
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if (strlcpy(buf, str, sizeof(buf)) >= sizeof(buf)) |
359 |
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return (-1); |
360 |
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361 |
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memset(&hints, 0, sizeof(hints)); |
362 |
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hints.ai_flags = 0; |
363 |
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hints.ai_family = AF_UNSPEC; |
364 |
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hints.ai_socktype = SOCK_STREAM; |
365 |
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hints.ai_protocol = IPPROTO_TCP; |
366 |
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|
367 |
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if (buf[0] == '[' && |
368 |
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(servp = strchr(buf, ']')) != NULL && |
369 |
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(*(servp + 1) == '\0' || *(servp + 1) == ':')) { |
370 |
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hints.ai_family = AF_INET6; |
371 |
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hints.ai_flags = AI_NUMERICHOST; |
372 |
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nodep = buf + 1; |
373 |
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*servp++ = '\0'; |
374 |
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} else { |
375 |
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nodep = buf; |
376 |
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servp = strrchr(nodep, ':'); |
377 |
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} |
378 |
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if (servp != NULL) { |
379 |
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*servp = '\0'; |
380 |
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servp++; |
381 |
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} else |
382 |
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servp = NULL; |
383 |
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|
384 |
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if (getaddrinfo(nodep, servp, &hints, &ai) != 0) |
385 |
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return (-1); |
386 |
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|
387 |
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if (salen < ai->ai_addrlen) { |
388 |
|
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freeaddrinfo(ai); |
389 |
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return (-1); |
390 |
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} |
391 |
|
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memset(sa, 0, salen); |
392 |
|
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memcpy(sa, ai->ai_addr, ai->ai_addrlen); |
393 |
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|
394 |
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return (0); |
395 |
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} |