120 lines
3.3 KiB
Text
120 lines
3.3 KiB
Text
/*************************************************
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* Exim - an Internet mail transport agent *
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*************************************************/
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/* Copyright (c) The Exim Maintainers 2022 */
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/* Copyright (c) University of Cambridge 2001 */
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* See the file NOTICE for conditions of use and distribution. */
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/* Irix-specific code. This is concatenated onto the generic src/os.c file.
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Irix has a unique way of finding all the network interfaces, so we provide a
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unique function here, and define FIND_RUNNING_INTERFACES to stop src/os.c
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trying to provide the function. The macro may be set initially anyway, when
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compiling os. for utilities that don't want this function. */
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#ifndef FIND_RUNNING_INTERFACES
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#define FIND_RUNNING_INTERFACES
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/* This is the special form of the function using sysctl() which is the only
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form that returns all the aliases on IRIX systems. This code has its origins
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in a sample program that came from within SGI. */
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#include <sys/sysctl.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/soioctl.h>
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#include <net/route.h>
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#define ROUNDUP(a) ((a) > 0 ? (1 + (((a) - 1) | (sizeof(__uint64_t) -1))) \
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: sizeof(__uint64_t))
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#ifdef _HAVE_SA_LEN
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#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
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#else
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#define ADVANCE(x, n) (x += ROUNDUP(_FAKE_SA_LEN_DST(n)))
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#endif
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ip_address_item *
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os_find_running_interfaces(void)
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{
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ip_address_item *yield = NULL;
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ip_address_item *last = NULL;
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ip_address_item *next;
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size_t needed;
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int mib[6];
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char *buf, *nextaddr, *lim;
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register struct if_msghdr *ifm;
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[2] = 0;
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mib[3] = 0;
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mib[4] = NET_RT_IFLIST;
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mib[5] = 0;
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/* Get an estimate of the amount of store needed, then get the store and
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get the data into it. Any error causes a panic death. */
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if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
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log_write(0, LOG_PANIC_DIE, "iflist-sysctl-estimate failed: %s",
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strerror(errno));
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buf = store_get(needed, GET_UNTAINTED);
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if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
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log_write(0, LOG_PANIC_DIE, "sysctl of ifnet list failed: %s",
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strerror(errno));
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/* Now fish out the data for each interface */
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lim = buf + needed;
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for (nextaddr = buf; nextaddr < lim; nextaddr += ifm->ifm_msglen)
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{
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ifm = (struct if_msghdr *)nextaddr;
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if (ifm->ifm_type != RTM_IFINFO)
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{
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struct ifa_msghdr *ifam = (struct ifa_msghdr *)ifm;
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struct sockaddr_in *mask = NULL, *addr = NULL;
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if ((ifam->ifam_addrs & RTA_NETMASK) != 0)
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mask = (struct sockaddr_in *)(ifam + 1);
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if ((ifam->ifam_addrs & RTA_IFA) != 0)
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{
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char *cp = CS mask;
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struct sockaddr *sa = (struct sockaddr *)mask;
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ADVANCE(cp, sa);
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addr = (struct sockaddr_in *)cp;
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}
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/* Create a data block for the address, fill in the data, and put it on
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the chain. This data has to survive for ever, so use malloc. */
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if (addr != NULL)
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{
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next = store_malloc(sizeof(ip_address_item));
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next->next = NULL;
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next->port = 0;
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(void)host_ntoa(-1, addr, next->address, NULL);
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if (yield == NULL) yield = last = next; else
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{
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last->next = next;
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last = next;
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}
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DEBUG(D_interface) debug_printf("Actual local interface address is %s\n",
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last->address);
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}
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}
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}
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return yield;
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}
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#endif /* FIND_RUNNING_INTERFACES */
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/* End of os.c-IRIX */
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