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Including libraries: libutil,libmemstat,libxo.
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logwang
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Aug 31, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,195 @@ | ||
| /* | ||
| * Copyright (c) 2003 Bruce M. Simpson. | ||
| * All rights reserved | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions | ||
| * are met: | ||
| * 1. Redistributions of source code must retain the above copyright | ||
| * notice, this list of conditions and the following disclaimer. | ||
| * 2. Redistributions in binary form must reproduce the above copyright | ||
| * notice, this list of conditions and the following disclaimer in the | ||
| * documentation and/or other materials provided with the distribution. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | ||
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | ||
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
| * SUCH DAMAGE. | ||
| */ | ||
|
|
||
| #include <sys/cdefs.h> | ||
|
|
||
| #include <sys/param.h> | ||
| #include <sys/sysctl.h> | ||
| #include <sys/ioctl.h> | ||
| #include <sys/socket.h> | ||
| #include <net/if.h> | ||
| #include <net/if_dl.h> | ||
| #include <net/route.h> | ||
|
|
||
| #include <errno.h> | ||
| #include <ifaddrs.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
|
|
||
| #define SALIGN (sizeof(long) - 1) | ||
| #define SA_RLEN(sa) ((sa)->sa_len ? (((sa)->sa_len + SALIGN) & ~SALIGN) : \ | ||
| (SALIGN + 1)) | ||
| #define MAX_SYSCTL_TRY 5 | ||
| #define RTA_MASKS (RTA_GATEWAY | RTA_IFP | RTA_IFA) | ||
|
|
||
| int | ||
| getifmaddrs(struct ifmaddrs **pif) | ||
| { | ||
| int icnt = 1; | ||
| int dcnt = 0; | ||
| int ntry = 0; | ||
| size_t len; | ||
| size_t needed; | ||
| int mib[6]; | ||
| int i; | ||
| char *buf; | ||
| char *data; | ||
| char *next; | ||
| char *p; | ||
| struct ifma_msghdr *ifmam; | ||
| struct ifmaddrs *ifa, *ift; | ||
| struct rt_msghdr *rtm; | ||
| struct sockaddr *sa; | ||
|
|
||
| mib[0] = CTL_NET; | ||
| mib[1] = PF_ROUTE; | ||
| mib[2] = 0; /* protocol */ | ||
| mib[3] = 0; /* wildcard address family */ | ||
| mib[4] = NET_RT_IFMALIST; | ||
| mib[5] = 0; /* no flags */ | ||
| do { | ||
| if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) | ||
| return (-1); | ||
| if ((buf = malloc(needed)) == NULL) | ||
| return (-1); | ||
| if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { | ||
| if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) { | ||
| free(buf); | ||
| return (-1); | ||
| } | ||
| free(buf); | ||
| buf = NULL; | ||
| } | ||
| } while (buf == NULL); | ||
|
|
||
| for (next = buf; next < buf + needed; next += rtm->rtm_msglen) { | ||
| rtm = (struct rt_msghdr *)(void *)next; | ||
| if (rtm->rtm_version != RTM_VERSION) | ||
| continue; | ||
| switch (rtm->rtm_type) { | ||
| case RTM_NEWMADDR: | ||
| ifmam = (struct ifma_msghdr *)(void *)rtm; | ||
| if ((ifmam->ifmam_addrs & RTA_IFA) == 0) | ||
| break; | ||
| icnt++; | ||
| p = (char *)(ifmam + 1); | ||
| for (i = 0; i < RTAX_MAX; i++) { | ||
| if ((RTA_MASKS & ifmam->ifmam_addrs & | ||
| (1 << i)) == 0) | ||
| continue; | ||
| sa = (struct sockaddr *)(void *)p; | ||
| len = SA_RLEN(sa); | ||
| dcnt += len; | ||
| p += len; | ||
| } | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| data = malloc(sizeof(struct ifmaddrs) * icnt + dcnt); | ||
| if (data == NULL) { | ||
| free(buf); | ||
| return (-1); | ||
| } | ||
|
|
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| ifa = (struct ifmaddrs *)(void *)data; | ||
| data += sizeof(struct ifmaddrs) * icnt; | ||
|
|
||
| memset(ifa, 0, sizeof(struct ifmaddrs) * icnt); | ||
| ift = ifa; | ||
|
|
||
| for (next = buf; next < buf + needed; next += rtm->rtm_msglen) { | ||
| rtm = (struct rt_msghdr *)(void *)next; | ||
| if (rtm->rtm_version != RTM_VERSION) | ||
| continue; | ||
|
|
||
| switch (rtm->rtm_type) { | ||
| case RTM_NEWMADDR: | ||
| ifmam = (struct ifma_msghdr *)(void *)rtm; | ||
| if ((ifmam->ifmam_addrs & RTA_IFA) == 0) | ||
| break; | ||
|
|
||
| p = (char *)(ifmam + 1); | ||
| for (i = 0; i < RTAX_MAX; i++) { | ||
| if ((RTA_MASKS & ifmam->ifmam_addrs & | ||
| (1 << i)) == 0) | ||
| continue; | ||
| sa = (struct sockaddr *)(void *)p; | ||
| len = SA_RLEN(sa); | ||
| switch (i) { | ||
| case RTAX_GATEWAY: | ||
| ift->ifma_lladdr = | ||
| (struct sockaddr *)(void *)data; | ||
| memcpy(data, p, len); | ||
| data += len; | ||
| break; | ||
|
|
||
| case RTAX_IFP: | ||
| ift->ifma_name = | ||
| (struct sockaddr *)(void *)data; | ||
| memcpy(data, p, len); | ||
| data += len; | ||
| break; | ||
|
|
||
| case RTAX_IFA: | ||
| ift->ifma_addr = | ||
| (struct sockaddr *)(void *)data; | ||
| memcpy(data, p, len); | ||
| data += len; | ||
| break; | ||
|
|
||
| default: | ||
| data += len; | ||
| break; | ||
| } | ||
| p += len; | ||
| } | ||
| ift->ifma_next = ift + 1; | ||
| ift = ift->ifma_next; | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| free(buf); | ||
|
|
||
| if (ift > ifa) { | ||
| ift--; | ||
| ift->ifma_next = NULL; | ||
| *pif = ifa; | ||
| } else { | ||
| *pif = NULL; | ||
| free(ifa); | ||
| } | ||
| return (0); | ||
| } | ||
|
|
||
| void | ||
| freeifmaddrs(struct ifmaddrs *ifmp) | ||
| { | ||
|
|
||
| free(ifmp); | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| #define _GNU_SOURCE | ||
| #include <errno.h> | ||
| #include "compat.h" | ||
|
|
||
| const char * | ||
| getprogname(void) | ||
| { | ||
| return program_invocation_name; | ||
| } | ||
|
|
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