From c1a946a824a7b870e06b9eff209ad12d11484d1a Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Fri, 23 Apr 2010 09:49:25 +0200 Subject: add rtnl-route-add.c to examples MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Heavily based on an example from Alejandro Castaño. Untested. Signed-off-by: Alejandro Castaño Signed-off-by: Pablo Neira Ayuso --- examples/Makefile.am | 5 +++ examples/rtnl-route-add.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 98 insertions(+) create mode 100644 examples/rtnl-route-add.c diff --git a/examples/Makefile.am b/examples/Makefile.am index 1874971..8102d2f 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -3,6 +3,7 @@ include $(top_srcdir)/Make_global.am check_PROGRAMS = rtnl-link-dump rtnl-link-dump2 rtnl-link-dump3 \ rtnl-link-event \ rtnl-link-set \ + rtnl-route-add \ rtnl-route-dump \ genl-family-get @@ -18,6 +19,10 @@ rtnl_link_dump3_SOURCES = rtnl-link-dump3.c rtnl_link_dump3_LDADD = ../src/libmnl.la rtnl_link_dump3_LDFLAGS = -dynamic -ldl +rtnl_route_add_SOURCES = rtnl-route-add.c +rtnl_route_add_LDADD = ../src/libmnl.la +rtnl_route_add_LDFLAGS = -dynamic -ldl + rtnl_link_event_SOURCES = rtnl-link-event.c rtnl_link_event_LDADD = ../src/libmnl.la rtnl_link_event_LDFLAGS = -dynamic -ldl diff --git a/examples/rtnl-route-add.c b/examples/rtnl-route-add.c new file mode 100644 index 0000000..81c508f --- /dev/null +++ b/examples/rtnl-route-add.c @@ -0,0 +1,93 @@ +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +int main(int argc, char *argv[]) +{ + if (argc <= 3) { + printf("Usage: %s iface destination cidr [gateway]\n", argv[0]); + printf("Example: %s eth0 10.0.1.12 32 10.0.1.11\n", argv[0]); + exit(EXIT_FAILURE); + } + + int iface; + iface = if_nametoindex(argv[1]); + if (iface == 0) { + printf("Bad interface name\n"); + exit(EXIT_FAILURE); + } + + in_addr_t dst; + if (!inet_pton(AF_INET, argv[2], &dst)) { + printf("Bad destination\n"); + exit(EXIT_FAILURE); + } + + uint32_t mask; + if (sscanf(argv[3], "%u", &mask) == 0) { + printf("Bad CIDR\n"); + exit(EXIT_FAILURE); + } + + in_addr_t gw; + if (argc >= 5 && !inet_pton(AF_INET, argv[4], &gw)) { + printf("Bad gateway\n"); + exit(EXIT_FAILURE); + } + + struct mnl_socket *nl; + char buf[getpagesize()]; + struct nlmsghdr *nlh; + struct rtmsg *rtm; + + nlh = mnl_nlmsg_put_header(buf); + nlh->nlmsg_type = RTM_NEWROUTE; + nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE; + nlh->nlmsg_seq = time(NULL); + + rtm = mnl_nlmsg_put_extra_header(nlh, sizeof(struct rtmsg)); + rtm->rtm_family = AF_INET; + rtm->rtm_dst_len = mask; + rtm->rtm_src_len = 0; + rtm->rtm_tos = 0; + rtm->rtm_protocol = RTPROT_BOOT; + rtm->rtm_table = RT_TABLE_MAIN; + rtm->rtm_type = RTN_UNICAST; + /* is there any gateway? */ + rtm->rtm_scope = (argc == 4) ? RT_SCOPE_LINK : RT_SCOPE_UNIVERSE; + rtm->rtm_flags = 0; + + mnl_attr_put_u32(nlh, RTA_DST, dst); + mnl_attr_put_u32(nlh, RTA_OIF, iface); + if (argc >= 5) + mnl_attr_put_u32(nlh, RTA_GATEWAY, gw); + + nl = mnl_socket_open(NETLINK_ROUTE); + if (nl == NULL) { + perror("mnl_socket_open"); + exit(EXIT_FAILURE); + } + + if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { + perror("mnl_socket_bind"); + exit(EXIT_FAILURE); + } + + if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { + perror("mnl_socket_send"); + exit(EXIT_FAILURE); + } + + mnl_socket_close(nl); + + return 0; +} -- cgit v1.2.3