diff options
author | Dmitry Shmidt <dimitrysh@google.com> | 2010-01-08 10:47:26 -0800 |
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committer | Dmitry Shmidt <dimitrysh@google.com> | 2010-01-08 10:47:26 -0800 |
commit | 938bc384f44031877543765a9ae18c764f5da9c8 (patch) | |
tree | 3c5d3e2749b7b1bef613a1283373d61945db7421 /if-bsd.c | |
parent | b22386a3de85d94030c7071760f4a5e3368bfbe5 (diff) | |
download | external_dhcpcd-938bc384f44031877543765a9ae18c764f5da9c8.zip external_dhcpcd-938bc384f44031877543765a9ae18c764f5da9c8.tar.gz external_dhcpcd-938bc384f44031877543765a9ae18c764f5da9c8.tar.bz2 |
dhcpcd: Upgrade from 4.0.1 to 4.0.15
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
Diffstat (limited to 'if-bsd.c')
-rw-r--r-- | if-bsd.c | 104 |
1 files changed, 59 insertions, 45 deletions
@@ -98,12 +98,11 @@ if_address(const char *ifname, const struct in_addr *address, } int -if_route(const char *ifname, const struct in_addr *destination, - const struct in_addr *netmask, const struct in_addr *gateway, +if_route(const struct interface *iface, const struct in_addr *dest, + const struct in_addr *net, const struct in_addr *gate, _unused int metric, int action) { int s; - static int seq; union sockunion { struct sockaddr sa; struct sockaddr_in sin; @@ -116,68 +115,83 @@ if_route(const char *ifname, const struct in_addr *destination, struct rtm { struct rt_msghdr hdr; - char buffer[sizeof(su) * 3]; + char buffer[sizeof(su) * 4]; } rtm; - char *bp = rtm.buffer; + char *bp = rtm.buffer, *p; size_t l; - unsigned char *hwaddr; - size_t hwlen = 0; int retval = 0; +#define ADDSU(_su) { \ + l = SA_SIZE(&(_su.sa)); \ + memcpy(bp, &(_su), l); \ + bp += l; \ +} +#define ADDADDR(_addr) { \ + memset (&su, 0, sizeof(su)); \ + su.sin.sin_family = AF_INET; \ + su.sin.sin_len = sizeof(su.sin); \ + memcpy (&su.sin.sin_addr, _addr, sizeof(su.sin.sin_addr)); \ + ADDSU(su); \ +} + if ((s = socket(PF_ROUTE, SOCK_RAW, 0)) == -1) return -1; memset(&rtm, 0, sizeof(rtm)); rtm.hdr.rtm_version = RTM_VERSION; - rtm.hdr.rtm_seq = ++seq; + rtm.hdr.rtm_seq = 1; if (action == 0) rtm.hdr.rtm_type = RTM_CHANGE; else if (action > 0) rtm.hdr.rtm_type = RTM_ADD; else rtm.hdr.rtm_type = RTM_DELETE; - rtm.hdr.rtm_flags = RTF_UP | RTF_STATIC; - if (netmask->s_addr == INADDR_BROADCAST) + rtm.hdr.rtm_flags = RTF_UP; + /* None interface subnet routes are static. */ + if (gate->s_addr != INADDR_ANY || + net->s_addr != iface->net.s_addr || + dest->s_addr != (iface->addr.s_addr & iface->net.s_addr)) + rtm.hdr.rtm_flags |= RTF_STATIC; + rtm.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY; + if (dest->s_addr == gate->s_addr && net->s_addr == INADDR_BROADCAST) rtm.hdr.rtm_flags |= RTF_HOST; + else { + rtm.hdr.rtm_addrs |= RTA_NETMASK; + if (rtm.hdr.rtm_flags & RTF_STATIC) + rtm.hdr.rtm_flags |= RTF_GATEWAY; + if (action >= 0) + rtm.hdr.rtm_addrs |= RTA_IFA; + } - /* This order is important */ - rtm.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; - -#define ADDADDR(_addr) \ - memset (&su, 0, sizeof(su)); \ - su.sin.sin_family = AF_INET; \ - su.sin.sin_len = sizeof(su.sin); \ - memcpy (&su.sin.sin_addr, _addr, sizeof(su.sin.sin_addr)); \ - l = SA_SIZE (&(su.sa)); \ - memcpy (bp, &(su), l); \ - bp += l; - - ADDADDR(destination); - - if (gateway->s_addr == INADDR_ANY) { - /* Make us a link layer socket */ - hwaddr = xmalloc(sizeof(unsigned char) * HWADDR_LEN); - do_interface(ifname, hwaddr, &hwlen, NULL, 0, 0); + ADDADDR(dest); + if (rtm.hdr.rtm_flags & RTF_HOST || + !(rtm.hdr.rtm_flags & RTF_STATIC)) + { + /* Make us a link layer socket for the host gateway */ memset(&su, 0, sizeof(su)); - su.sdl.sdl_len = sizeof(su.sdl); - su.sdl.sdl_family = AF_LINK; - su.sdl.sdl_nlen = strlen(ifname); - memcpy(&su.sdl.sdl_data, ifname, (size_t)su.sdl.sdl_nlen); - su.sdl.sdl_alen = hwlen; - memcpy(((unsigned char *)&su.sdl.sdl_data) + su.sdl.sdl_nlen, - hwaddr, (size_t)su.sdl.sdl_alen); - - l = SA_SIZE(&(su.sa)); - memcpy(bp, &su, l); - bp += l; - free(hwaddr); - } else { - rtm.hdr.rtm_flags |= RTF_GATEWAY; - ADDADDR(gateway); + su.sdl.sdl_len = sizeof(struct sockaddr_dl); + link_addr(iface->name, &su.sdl); + ADDSU(su); + } else + ADDADDR(gate); + + if (rtm.hdr.rtm_addrs & RTA_NETMASK) { + /* Ensure that netmask is set correctly */ + memset(&su, 0, sizeof(su)); + su.sin.sin_family = AF_INET; + su.sin.sin_len = sizeof(su.sin); + memcpy(&su.sin.sin_addr, &net->s_addr, sizeof(su.sin.sin_addr)); + p = su.sa.sa_len + (char *)&su; + for (su.sa.sa_len = 0; p > (char *)&su;) + if (*--p != 0) { + su.sa.sa_len = 1 + p - (char *)&su; + break; + } + ADDSU(su); } - ADDADDR(netmask); -#undef ADDADDR + if (rtm.hdr.rtm_addrs & RTA_IFA) + ADDADDR(&iface->addr); rtm.hdr.rtm_msglen = l = bp - (char *)&rtm; if (write(s, &rtm, l) == -1) |