Agrego manejador de peticiones por socket unix.
Félix Arreola Rodríguez
parent
b776278ccb
commit
c03db09384
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@ -4,6 +4,7 @@ bin_PROGRAMS = network-inador
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network_inador_SOURCES = network-inador.c network-inador.h \
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events.c events.h \
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interfaces.c interfaces.h \
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manager.c manager.h \
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utils.c utils.h
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#network_inador_CPPFLAGS = -DGAMEDATA_DIR=\"$(gamedatadir)/\" -DLOCALEDIR=\"$(localedir)\" $(AM_CPPFLAGS)
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216
src/interfaces.c
216
src/interfaces.c
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@ -43,7 +43,7 @@
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#include "interfaces.h"
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static Interface * _interfaces_locate_by_index (Interface *list, int index);
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Interface * interfaces_locate_by_index (Interface *list, int index);
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static void _interfaces_append_ipv4_to_struct (Interface *interface, struct in_addr address, uint32_t prefix);
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int global_nl_seq = 1;
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@ -53,7 +53,7 @@ typedef struct {
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struct rtgenmsg gen;
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} nl_req_t;
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static Interface * _interfaces_locate_by_index (Interface *list, int index) {
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Interface * interfaces_locate_by_index (Interface *list, int index) {
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Interface *iface;
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iface = list;
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@ -182,7 +182,7 @@ void interfaces_add_or_update_rtnl_link (NetworkInadorHandle *handle, struct nlm
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len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct ifinfomsg));
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printf ("Mensaje de nueva interfaz\n");
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new = _interfaces_locate_by_index (handle->interfaces, iface->ifi_index);
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new = interfaces_locate_by_index (handle->interfaces, iface->ifi_index);
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/* Si el objeto interface no existe, crearlo y ligarlo en la lista de interfaces */
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if (new == NULL) {
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@ -246,7 +246,7 @@ void interfaces_del_rtnl_link (NetworkInadorHandle *handle, struct nlmsghdr *h)
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IPv4 *address;
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iface = NLMSG_DATA(h);
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to_del = _interfaces_locate_by_index (handle->interfaces, iface->ifi_index);
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to_del = interfaces_locate_by_index (handle->interfaces, iface->ifi_index);
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if (to_del == NULL) {
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printf ("Error, solicitaron eliminar interfaz que ya no existe\n");
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@ -294,7 +294,7 @@ void interfaces_add_or_update_ipv4 (NetworkInadorHandle *handle, struct nlmsghdr
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prefix = addr->ifa_prefixlen;
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iface = _interfaces_locate_by_index (handle->interfaces, addr->ifa_index);
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iface = interfaces_locate_by_index (handle->interfaces, addr->ifa_index);
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if (iface == NULL) {
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/* No encuentro la interfaz... */
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@ -337,7 +337,7 @@ void interfaces_del_ipv4 (NetworkInadorHandle *handle, struct nlmsghdr *h) {
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prefix = addr->ifa_prefixlen;
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iface = _interfaces_locate_by_index (handle->interfaces, addr->ifa_index);
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iface = interfaces_locate_by_index (handle->interfaces, addr->ifa_index);
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if (iface == NULL) {
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/* No encuentro la interfaz... */
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@ -380,6 +380,210 @@ void interfaces_del_ipv4 (NetworkInadorHandle *handle, struct nlmsghdr *h) {
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}
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}
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void interfaces_manual_del_ipv4 (int sock, Interface *interface, IPv4 *address) {
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struct msghdr rtnl_msg;
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struct iovec io;
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struct sockaddr_nl kernel;
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char buffer[8192];
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int len;
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struct nlmsghdr *nl;
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struct ifaddrmsg *ifa;
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struct rtattr *rta;
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struct nlmsgerr *l_err;
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struct sockaddr_nl local_nl;
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socklen_t local_size;
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/* Recuperar el puerto local del netlink */
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local_size = sizeof (local_nl);
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getsockname (sock, (struct sockaddr *) &local_nl, &local_size);
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memset (&kernel, 0, sizeof (kernel));
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memset (buffer, 0, sizeof (buffer));
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memset (&rtnl_msg, 0, sizeof (rtnl_msg));
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memset (&io, 0, sizeof (io));
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kernel.nl_family = AF_NETLINK; /* fill-in kernel address (destination of our message) */
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kernel.nl_groups = 0;
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nl = (struct nlmsghdr *) buffer;
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nl->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
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nl->nlmsg_type = RTM_DELADDR;
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nl->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
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nl->nlmsg_seq = global_nl_seq++;
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nl->nlmsg_pid = local_nl.nl_pid;
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ifa = (struct ifaddrmsg*) NLMSG_DATA (nl);
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ifa->ifa_family = AF_INET; // we only get ipv4 address here
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ifa->ifa_prefixlen = address->prefix;
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ifa->ifa_flags = IFA_F_PERMANENT;
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ifa->ifa_scope = 0;
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ifa->ifa_index = interface->index;
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rta = (struct rtattr*) IFA_RTA(ifa);
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rta->rta_type = IFA_LOCAL;
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memcpy (RTA_DATA(rta), &address->sin_addr, sizeof (struct in_addr));
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rta->rta_len = RTA_LENGTH(sizeof (struct in_addr));
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// update nlmsghdr length
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nl->nlmsg_len = NLMSG_ALIGN(nl->nlmsg_len) + rta->rta_len;
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// del interface address
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len = sizeof (buffer) - nl->nlmsg_len;
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rta = (struct rtattr*) RTA_NEXT (rta, len);
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rta->rta_type = IFA_ADDRESS;
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memcpy (RTA_DATA(rta), &address->sin_addr, sizeof (struct in_addr));
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rta->rta_len = RTA_LENGTH(sizeof (struct in_addr));
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// update nlmsghdr length
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nl->nlmsg_len += rta->rta_len;
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io.iov_base = buffer;
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io.iov_len = nl->nlmsg_len;
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rtnl_msg.msg_iov = &io;
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rtnl_msg.msg_iovlen = 1;
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rtnl_msg.msg_name = &kernel;
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rtnl_msg.msg_namelen = sizeof(kernel);
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len = sendmsg (sock, (struct msghdr *) &rtnl_msg, 0);
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/* Esperar la respuesta */
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memset(&io, 0, sizeof(io));
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memset(&rtnl_msg, 0, sizeof(rtnl_msg));
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io.iov_base = buffer;
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io.iov_len = sizeof (buffer);
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rtnl_msg.msg_iov = &io;
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rtnl_msg.msg_iovlen = 1;
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rtnl_msg.msg_name = &kernel;
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rtnl_msg.msg_namelen = sizeof(kernel);
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len = recvmsg(sock, &rtnl_msg, 0);
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nl = (struct nlmsghdr *) buffer;
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for (; NLMSG_OK(nl, len); nl = NLMSG_NEXT(nl, len)) {
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if (nl->nlmsg_type == NLMSG_DONE) {
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printf ("DEL IP Msg type: DONE!\n");
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break;
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}
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if (nl->nlmsg_type == NLMSG_ERROR) {
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l_err = (struct nlmsgerr*) NLMSG_DATA (nl);
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if (nl->nlmsg_len < NLMSG_LENGTH (sizeof (struct nlmsgerr))) {
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printf ("DEL IP Error tamaño truncado\n");
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} else if (l_err->error != 0) {
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// Error:
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printf ("DEL IP Error: %i\n", l_err->error);
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}
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break;
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}
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}
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}
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void interfaces_manual_add_ipv4 (int sock, Interface *interface, IPv4 *address) {
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struct msghdr rtnl_msg;
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struct iovec io;
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struct sockaddr_nl kernel;
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char buffer[8192];
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int len;
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struct nlmsghdr *nl;
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struct ifaddrmsg *ifa;
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struct rtattr *rta;
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struct nlmsgerr *l_err;
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struct sockaddr_nl local_nl;
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socklen_t local_size;
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/* Recuperar el puerto local del netlink */
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local_size = sizeof (local_nl);
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getsockname (sock, (struct sockaddr *) &local_nl, &local_size);
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memset (&kernel, 0, sizeof (kernel));
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memset (buffer, 0, sizeof (buffer));
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memset (&io, 0, sizeof (io));
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memset (&rtnl_msg, 0, sizeof (rtnl_msg));
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kernel.nl_family = AF_NETLINK; /* fill-in kernel address (destination of our message) */
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kernel.nl_groups = 0;
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nl = (struct nlmsghdr *) buffer;
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nl->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
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nl->nlmsg_type = RTM_NEWADDR;
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nl->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
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nl->nlmsg_seq = global_nl_seq++;
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nl->nlmsg_pid = local_nl.nl_pid;
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ifa = (struct ifaddrmsg*) NLMSG_DATA (nl);
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ifa->ifa_family = AF_INET; // we only get ipv4 address here
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ifa->ifa_prefixlen = address->prefix;
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ifa->ifa_flags = IFA_F_PERMANENT;
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ifa->ifa_scope = 0;
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ifa->ifa_index = interface->index;
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rta = (struct rtattr*) IFA_RTA(ifa);
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rta->rta_type = IFA_LOCAL;
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memcpy (RTA_DATA(rta), &address->sin_addr, sizeof (struct in_addr));
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rta->rta_len = RTA_LENGTH(sizeof (struct in_addr));
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// update nlmsghdr length
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nl->nlmsg_len = NLMSG_ALIGN(nl->nlmsg_len) + rta->rta_len;
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// del interface address
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len = sizeof (buffer) - nl->nlmsg_len;
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rta = (struct rtattr*) RTA_NEXT (rta, len);
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rta->rta_type = IFA_ADDRESS;
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memcpy (RTA_DATA(rta), &address->sin_addr, sizeof (struct in_addr));
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rta->rta_len = RTA_LENGTH(sizeof (struct in_addr));
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// update nlmsghdr length
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nl->nlmsg_len += rta->rta_len;
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io.iov_base = buffer;
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io.iov_len = nl->nlmsg_len;
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rtnl_msg.msg_iov = &io;
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rtnl_msg.msg_iovlen = 1;
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rtnl_msg.msg_name = &kernel;
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rtnl_msg.msg_namelen = sizeof(kernel);
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len = sendmsg (sock, (struct msghdr *) &rtnl_msg, 0);
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/* Esperar la respuesta */
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memset (&io, 0, sizeof (io));
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memset (&rtnl_msg, 0, sizeof (rtnl_msg));
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memset (buffer, 0, sizeof (buffer));
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io.iov_base = buffer;
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io.iov_len = sizeof (buffer);
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rtnl_msg.msg_iov = &io;
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rtnl_msg.msg_iovlen = 1;
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rtnl_msg.msg_name = &kernel;
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rtnl_msg.msg_namelen = sizeof(kernel);
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len = recvmsg(sock, &rtnl_msg, 0);
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nl = (struct nlmsghdr *) buffer;
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for (; NLMSG_OK(nl, len); nl = NLMSG_NEXT(nl, len)) {
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if (nl->nlmsg_type == NLMSG_DONE) {
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printf ("Add IP Msg type: DONE!\n");
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break;
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}
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if (nl->nlmsg_type == NLMSG_ERROR) {
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l_err = (struct nlmsgerr*) NLMSG_DATA (nl);
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if (nl->nlmsg_len < NLMSG_LENGTH (sizeof (struct nlmsgerr))) {
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printf ("Add IP Error tamaño truncado\n");
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} else if (l_err->error != 0) {
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// Error:
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printf ("Add IP Error: %i\n", l_err->error);
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}
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break;
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}
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}
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}
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void interfaces_clear_all_ipv4_address (NetworkInadorHandle *handle, Interface *interface) {
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IPv4 *address;
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address = interface->v4_address;
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while (address != NULL) {
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interfaces_manual_del_ipv4 (handle->netlink_sock_request, interface, address);
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address = address->next;
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}
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}
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void interfaces_list_all (NetworkInadorHandle *handle, int sock) {
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struct msghdr rtnl_msg; /* generic msghdr struct for use with sendmsg */
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struct iovec io;
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@ -23,15 +23,23 @@
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#ifndef __INTERFACES_H__
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#define __INTERFACES_H__
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#include <asm/types.h>
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#include <sys/socket.h>
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#include <linux/netlink.h>
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#include "network-inador.h"
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extern int global_nl_seq;
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void interfaces_list_all (NetworkInadorHandle *handle, int sock);
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Interface * interfaces_locate_by_index (Interface *list, int index);
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void interfaces_add_or_update_rtnl_link (NetworkInadorHandle *handle, struct nlmsghdr *h);
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void interfaces_del_rtnl_link (NetworkInadorHandle *handle, struct nlmsghdr *h);
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void interfaces_add_or_update_ipv4 (NetworkInadorHandle *handle, struct nlmsghdr *h);
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void interfaces_del_ipv4 (NetworkInadorHandle *handle, struct nlmsghdr *h);
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void interfaces_clear_all_ipv4_address (NetworkInadorHandle *handle, Interface *interface);
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void interfaces_manual_add_ipv4 (int sock, Interface *interface, IPv4 *address);
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#endif
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@ -0,0 +1,239 @@
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/*
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* manager.c
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* This file is part of Network-inador
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*
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* Copyright (C) 2011 - Félix Arreola Rodríguez
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*
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* Network-inador is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Network-inador is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Network-inador; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#include <glib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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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 <sys/stat.h>
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#include "manager.h"
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#include "interfaces.h"
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#include "network-inador.h"
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#define SOCKET_PATH "/tmp/network-inador.socket"
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enum {
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MANAGER_COMMAND_REQUEST = 0,
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MANAGER_COMMAND_LIST_IFACES = 0,
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MANAGER_COMMAND_SET_IPV4,
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MANAGER_RESPONSE = 128,
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MANAGER_RESPONSE_REQUEST_INVALID = 128,
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MANAGER_RESPONSE_PROCESING,
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MANAGER_RESPONSE_LIST_IFACES,
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};
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#define MANAGER_IFACE_TYPE_WIRELESS 2
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#define MANAGER_IFACE_TYPE_BRIDGE 4
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#define MANAGER_IFACE_TYPE_LOOPBACK 8
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static void _manager_send_invalid_request (int sock, struct sockaddr_un *client, socklen_t socklen, int seq) {
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unsigned char buffer[128];
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buffer[0] = MANAGER_RESPONSE_REQUEST_INVALID;
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buffer[1] = seq;
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sendto (sock, buffer, 2, 0, (struct sockaddr *) client, socklen);
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}
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static void _manager_send_processing (int sock, struct sockaddr_un *client, socklen_t socklen, int seq) {
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unsigned char buffer[128];
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buffer[0] = MANAGER_RESPONSE_PROCESING;
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buffer[1] = seq;
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sendto (sock, buffer, 2, 0, (struct sockaddr *) client, socklen);
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}
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static void _manager_send_list_interfaces (NetworkInadorHandle *handle, int sock, struct sockaddr_un *client, socklen_t socklen, int seq) {
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unsigned char buffer[8192];
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Interface *iface_g;
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int pos;
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int flags;
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buffer[0] = MANAGER_RESPONSE_LIST_IFACES;
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buffer[1] = seq;
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iface_g = handle->interfaces;
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pos = 2;
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while (iface_g != NULL) {
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buffer[pos] = iface_g->index;
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flags = 0;
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if (iface_g->is_loopback) {
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flags |= MANAGER_IFACE_TYPE_LOOPBACK;
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}
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if (iface_g->is_wireless) {
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flags |= MANAGER_IFACE_TYPE_WIRELESS;
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}
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if (iface_g->is_bridge) {
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flags |= MANAGER_IFACE_TYPE_BRIDGE;
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}
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buffer[pos + 1] = flags;
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/* Copiar la mac address */
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memcpy (&buffer[pos + 2], iface_g->real_hw, ETHER_ADDR_LEN);
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/* Copiar el nombre y el terminador de cadena */
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memcpy (&buffer[pos + 2 + ETHER_ADDR_LEN], iface_g->name, strlen (iface_g->name) + 1);
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pos += 2 + ETHER_ADDR_LEN + strlen (iface_g->name) + 1;
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iface_g = iface_g->next;
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}
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buffer[pos] = 0;
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pos++;
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sendto (sock, buffer, pos, 0, (struct sockaddr *) client, socklen);
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}
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static void _manager_handle_interface_set_ipv4 (NetworkInadorHandle *handle, char *buffer_read, int len, int sock, struct sockaddr_un *client, socklen_t socklen, int seq) {
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/* Primero, validar que haya suficientes bytes:
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* 1 byte de la interfaz
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* 4 bytes de la dirección
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* 1 byte del prefix
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*/
|
||||
uint32_t prefix;
|
||||
struct in_addr sin_addr;
|
||||
int index;
|
||||
Interface *iface;
|
||||
IPv4 address;
|
||||
|
||||
if (len < 6) {
|
||||
/* Bytes unsuficientes */
|
||||
_manager_send_invalid_request (sock, client, socklen, seq);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
prefix = buffer_read[5];
|
||||
|
||||
if (prefix < 0 || prefix > 32) {
|
||||
_manager_send_invalid_request (sock, client, socklen, seq);
|
||||
return;
|
||||
}
|
||||
|
||||
index = buffer_read[0];
|
||||
|
||||
iface = interfaces_locate_by_index (handle->interfaces, index);
|
||||
|
||||
if (iface == NULL) {
|
||||
_manager_send_invalid_request (sock, client, socklen, seq);
|
||||
return;
|
||||
}
|
||||
|
||||
memcpy (&address.sin_addr, &buffer_read[1], sizeof (struct in_addr));
|
||||
address.prefix = prefix;
|
||||
address.next = NULL;
|
||||
|
||||
interfaces_clear_all_ipv4_address (handle, iface);
|
||||
interfaces_manual_add_ipv4 (handle->netlink_sock_request, iface, &address);
|
||||
|
||||
_manager_send_processing (sock, client, socklen, seq);
|
||||
}
|
||||
|
||||
static gboolean _manager_client_data (GIOChannel *source, GIOCondition condition, gpointer data) {
|
||||
NetworkInadorHandle *handle = (NetworkInadorHandle *) data;
|
||||
int sock;
|
||||
unsigned char buffer[4096];
|
||||
struct sockaddr_un client_name;
|
||||
socklen_t socklen;
|
||||
int len;
|
||||
int seq;
|
||||
|
||||
sock = g_io_channel_unix_get_fd (source);
|
||||
|
||||
socklen = sizeof (client_name);
|
||||
len = recvfrom (sock, buffer, sizeof (buffer), 0, (struct sockaddr *) &client_name, &socklen);
|
||||
|
||||
/* Procesar aquí la petición */
|
||||
if (len < 2) {
|
||||
_manager_send_invalid_request (sock, &client_name, socklen, 0);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
seq = buffer[1];
|
||||
|
||||
switch (buffer[0]) {
|
||||
case MANAGER_COMMAND_LIST_IFACES:
|
||||
_manager_send_list_interfaces (handle, sock, &client_name, socklen, seq);
|
||||
break;
|
||||
case MANAGER_COMMAND_SET_IPV4:
|
||||
_manager_handle_interface_set_ipv4 (handle, &buffer[2], len - 2, sock, &client_name, socklen, seq);
|
||||
break;
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
||||
int manager_setup_socket (NetworkInadorHandle *handle) {
|
||||
int sock;
|
||||
struct sockaddr_un socket_name;
|
||||
GIOChannel *channel;
|
||||
|
||||
sock = socket (AF_UNIX, SOCK_DGRAM, 0);
|
||||
|
||||
if (sock < 0) {
|
||||
perror ("Failed to create AF_UNIX socket");
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset (&socket_name, 0, sizeof (struct sockaddr_un));
|
||||
|
||||
socket_name.sun_family = AF_UNIX;
|
||||
strncpy (socket_name.sun_path, SOCKET_PATH, sizeof (socket_name.sun_path) - 1);
|
||||
|
||||
unlink (SOCKET_PATH);
|
||||
|
||||
if (bind (sock, (struct sockaddr *) &socket_name, sizeof (struct sockaddr_un)) < 0) {
|
||||
perror ("Bind");
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* TODO: Aplicar permisos aquí */
|
||||
chmod (SOCKET_PATH, 0666);
|
||||
|
||||
channel = g_io_channel_unix_new (sock);
|
||||
|
||||
g_io_add_watch (channel, G_IO_IN | G_IO_PRI, _manager_client_data, handle);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,31 @@
|
|||
/*
|
||||
* manager.h
|
||||
* This file is part of Network-inador
|
||||
*
|
||||
* Copyright (C) 2011 - Félix Arreola Rodríguez
|
||||
*
|
||||
* Network-inador is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* Network-inador is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with Network-inador; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor,
|
||||
* Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#ifndef __MANAGER_H__
|
||||
#define __MANAGER_H__
|
||||
|
||||
#include "network-inador.h"
|
||||
|
||||
int manager_setup_socket (NetworkInadorHandle *handle);
|
||||
|
||||
#endif
|
||||
|
||||
|
|
@ -43,6 +43,7 @@
|
|||
#include "network-inador.h"
|
||||
#include "interfaces.h"
|
||||
#include "events.h"
|
||||
#include "manager.h"
|
||||
|
||||
static GMainLoop *loop = NULL;
|
||||
|
||||
|
|
@ -88,12 +89,15 @@ int main (int argc, char *argv[]) {
|
|||
Interface *to_up;
|
||||
|
||||
nl_sock = create_ntlink_socket (0);
|
||||
handle.netlink_sock_request = nl_sock;
|
||||
nl_watch = create_ntlink_socket (-1);
|
||||
|
||||
interfaces_list_all (&handle, nl_sock);
|
||||
|
||||
events_setup_loop (&handle, nl_watch);
|
||||
|
||||
manager_setup_socket (&handle);
|
||||
|
||||
g_main_loop_run (loop);
|
||||
|
||||
return 0;
|
||||
|
|
|
|||
|
|
@ -23,6 +23,10 @@
|
|||
#ifndef __NETWORK_INADOR_H__
|
||||
#define __NETWORK_INADOR_H__
|
||||
|
||||
#include <netinet/in.h>
|
||||
#include <linux/if.h>
|
||||
#include <net/ethernet.h>
|
||||
|
||||
typedef struct _IPv4 {
|
||||
struct in_addr sin_addr;
|
||||
uint32_t prefix;
|
||||
|
|
@ -52,6 +56,7 @@ typedef struct _Interface {
|
|||
|
||||
typedef struct {
|
||||
Interface *interfaces;
|
||||
int netlink_sock_request;
|
||||
} NetworkInadorHandle;
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue