iof-bird-daemon / sysdep / unix / io.c @ e0835db4
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/*
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* BIRD Internet Routing Daemon -- Unix I/O
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*
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* (c) 1998--2004 Martin Mares <mj@ucw.cz>
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* (c) 2004 Ondrej Filip <feela@network.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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/* Unfortunately, some glibc versions hide parts of RFC 3542 API
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if _GNU_SOURCE is not defined. */
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <time.h> |
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#include <sys/time.h> |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <sys/uio.h> |
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#include <sys/un.h> |
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#include <poll.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <net/if.h> |
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#include <netinet/in.h> |
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#include <netinet/tcp.h> |
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#include <netinet/udp.h> |
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#include <netinet/icmp6.h> |
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#include "nest/bird.h" |
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#include "lib/lists.h" |
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#include "lib/resource.h" |
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#include "lib/socket.h" |
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#include "lib/event.h" |
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#include "lib/timer.h" |
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#include "lib/string.h" |
| 41 |
#include "nest/iface.h" |
| 42 |
#include "conf/conf.h" |
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|
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#include "sysdep/unix/unix.h" |
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#include CONFIG_INCLUDE_SYSIO_H
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/* Maximum number of calls of tx handler for one socket in one
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* poll iteration. Should be small enough to not monopolize CPU by
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* one protocol instance.
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*/
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#define MAX_STEPS 4 |
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/* Maximum number of calls of rx handler for all sockets in one poll
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iteration. RX callbacks are often much more costly so we limit
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this to gen small latencies */
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#define MAX_RX_STEPS 4 |
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|
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/*
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* Tracked Files
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*/
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struct rfile {
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resource r; |
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FILE *f; |
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}; |
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static void |
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rf_free(resource *r) |
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{
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struct rfile *a = (struct rfile *) r; |
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fclose(a->f); |
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} |
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static void |
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rf_dump(resource *r) |
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{
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struct rfile *a = (struct rfile *) r; |
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debug("(FILE *%p)\n", a->f);
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} |
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|
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static struct resclass rf_class = { |
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"FILE",
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sizeof(struct rfile), |
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rf_free, |
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rf_dump, |
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NULL,
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NULL
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}; |
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struct rfile *
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rf_open(pool *p, char *name, char *mode) |
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{
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FILE *f = fopen(name, mode); |
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|
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if (!f)
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return NULL; |
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|
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struct rfile *r = ralloc(p, &rf_class);
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r->f = f; |
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return r;
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} |
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void *
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rf_file(struct rfile *f)
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{
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return f->f;
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} |
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int
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rf_fileno(struct rfile *f)
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{
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return fileno(f->f);
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} |
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/*
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* Time clock
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*/
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btime boot_time; |
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|
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void
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times_init(struct timeloop *loop)
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{
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struct timespec ts;
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int rv;
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rv = clock_gettime(CLOCK_MONOTONIC, &ts); |
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if (rv < 0) |
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die("Monotonic clock is missing");
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if ((ts.tv_sec < 0) || (((s64) ts.tv_sec) > ((s64) 1 << 40))) |
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log(L_WARN "Monotonic clock is crazy");
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loop->last_time = ts.tv_sec S + ts.tv_nsec NS; |
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loop->real_time = 0;
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} |
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void
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times_update(struct timeloop *loop)
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{
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struct timespec ts;
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int rv;
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|
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rv = clock_gettime(CLOCK_MONOTONIC, &ts); |
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if (rv < 0) |
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die("clock_gettime: %m");
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btime new_time = ts.tv_sec S + ts.tv_nsec NS; |
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if (new_time < loop->last_time)
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log(L_ERR "Monotonic clock is broken");
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loop->last_time = new_time; |
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loop->real_time = 0;
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} |
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|
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void
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times_update_real_time(struct timeloop *loop)
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{
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struct timespec ts;
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int rv;
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rv = clock_gettime(CLOCK_REALTIME, &ts); |
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if (rv < 0) |
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die("clock_gettime: %m");
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loop->real_time = ts.tv_sec S + ts.tv_nsec NS; |
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} |
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/**
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* DOC: Sockets
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*
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* Socket resources represent network connections. Their data structure (&socket)
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* contains a lot of fields defining the exact type of the socket, the local and
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* remote addresses and ports, pointers to socket buffers and finally pointers to
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* hook functions to be called when new data have arrived to the receive buffer
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* (@rx_hook), when the contents of the transmit buffer have been transmitted
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* (@tx_hook) and when an error or connection close occurs (@err_hook).
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*
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* Freeing of sockets from inside socket hooks is perfectly safe.
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*/
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#ifndef SOL_IP
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#define SOL_IP IPPROTO_IP
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#endif
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#ifndef SOL_IPV6
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#define SOL_IPV6 IPPROTO_IPV6
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#endif
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#ifndef SOL_ICMPV6
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#define SOL_ICMPV6 IPPROTO_ICMPV6
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#endif
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/*
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* Sockaddr helper functions
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*/
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static inline int UNUSED sockaddr_length(int af) |
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{ return (af == AF_INET) ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6); }
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static inline void |
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sockaddr_fill4(struct sockaddr_in *sa, ip_addr a, uint port)
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{
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memset(sa, 0, sizeof(struct sockaddr_in)); |
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#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
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sa->sin_len = sizeof(struct sockaddr_in); |
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#endif
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sa->sin_family = AF_INET; |
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sa->sin_port = htons(port); |
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sa->sin_addr = ipa_to_in4(a); |
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} |
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static inline void |
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sockaddr_fill6(struct sockaddr_in6 *sa, ip_addr a, struct iface *ifa, uint port) |
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{
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memset(sa, 0, sizeof(struct sockaddr_in6)); |
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#ifdef SIN6_LEN
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sa->sin6_len = sizeof(struct sockaddr_in6); |
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#endif
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sa->sin6_family = AF_INET6; |
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sa->sin6_port = htons(port); |
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sa->sin6_flowinfo = 0;
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sa->sin6_addr = ipa_to_in6(a); |
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if (ifa && ipa_is_link_local(a))
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sa->sin6_scope_id = ifa->index; |
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} |
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void
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sockaddr_fill(sockaddr *sa, int af, ip_addr a, struct iface *ifa, uint port) |
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{
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if (af == AF_INET)
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sockaddr_fill4((struct sockaddr_in *) sa, a, port);
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else if (af == AF_INET6) |
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sockaddr_fill6((struct sockaddr_in6 *) sa, a, ifa, port);
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else
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bug("Unknown AF");
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} |
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static inline void |
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sockaddr_read4(struct sockaddr_in *sa, ip_addr *a, uint *port)
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{
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*port = ntohs(sa->sin_port); |
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*a = ipa_from_in4(sa->sin_addr); |
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} |
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static inline void |
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sockaddr_read6(struct sockaddr_in6 *sa, ip_addr *a, struct iface **ifa, uint *port) |
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{
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*port = ntohs(sa->sin6_port); |
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*a = ipa_from_in6(sa->sin6_addr); |
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if (ifa && ipa_is_link_local(*a))
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*ifa = if_find_by_index(sa->sin6_scope_id); |
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} |
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int
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sockaddr_read(sockaddr *sa, int af, ip_addr *a, struct iface **ifa, uint *port) |
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{
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if (sa->sa.sa_family != af)
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goto fail;
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if (af == AF_INET)
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sockaddr_read4((struct sockaddr_in *) sa, a, port);
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else if (af == AF_INET6) |
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sockaddr_read6((struct sockaddr_in6 *) sa, a, ifa, port);
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else
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goto fail;
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return 0; |
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fail:
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*a = IPA_NONE; |
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*port = 0;
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return -1; |
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} |
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/*
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* IPv6 multicast syscalls
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*/
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/* Fortunately standardized in RFC 3493 */
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#define INIT_MREQ6(maddr,ifa) \
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{ .ipv6mr_multiaddr = ipa_to_in6(maddr), .ipv6mr_interface = ifa->index }
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static inline int |
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sk_setup_multicast6(sock *s) |
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{
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int index = s->iface->index;
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int ttl = s->ttl;
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int n = 0; |
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if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_IF, &index, sizeof(index)) < 0) |
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ERR("IPV6_MULTICAST_IF");
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if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl)) < 0) |
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ERR("IPV6_MULTICAST_HOPS");
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if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_LOOP, &n, sizeof(n)) < 0) |
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ERR("IPV6_MULTICAST_LOOP");
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return 0; |
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} |
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static inline int |
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sk_join_group6(sock *s, ip_addr maddr) |
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{
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struct ipv6_mreq mr = INIT_MREQ6(maddr, s->iface);
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if (setsockopt(s->fd, SOL_IPV6, IPV6_JOIN_GROUP, &mr, sizeof(mr)) < 0) |
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ERR("IPV6_JOIN_GROUP");
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return 0; |
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} |
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static inline int |
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sk_leave_group6(sock *s, ip_addr maddr) |
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{
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struct ipv6_mreq mr = INIT_MREQ6(maddr, s->iface);
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if (setsockopt(s->fd, SOL_IPV6, IPV6_LEAVE_GROUP, &mr, sizeof(mr)) < 0) |
| 331 |
ERR("IPV6_LEAVE_GROUP");
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|
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return 0; |
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} |
| 335 |
|
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|
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/*
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* IPv6 packet control messages
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*/
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| 340 |
|
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/* Also standardized, in RFC 3542 */
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|
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/*
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* RFC 2292 uses IPV6_PKTINFO for both the socket option and the cmsg
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* type, RFC 3542 changed the socket option to IPV6_RECVPKTINFO. If we
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* don't have IPV6_RECVPKTINFO we suppose the OS implements the older
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* RFC and we use IPV6_PKTINFO.
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*/
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#ifndef IPV6_RECVPKTINFO
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#define IPV6_RECVPKTINFO IPV6_PKTINFO
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#endif
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/*
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* Same goes for IPV6_HOPLIMIT -> IPV6_RECVHOPLIMIT.
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*/
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#ifndef IPV6_RECVHOPLIMIT
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#define IPV6_RECVHOPLIMIT IPV6_HOPLIMIT
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#endif
|
| 358 |
|
| 359 |
|
| 360 |
#define CMSG6_SPACE_PKTINFO CMSG_SPACE(sizeof(struct in6_pktinfo)) |
| 361 |
#define CMSG6_SPACE_TTL CMSG_SPACE(sizeof(int)) |
| 362 |
|
| 363 |
static inline int |
| 364 |
sk_request_cmsg6_pktinfo(sock *s) |
| 365 |
{
|
| 366 |
int y = 1; |
| 367 |
|
| 368 |
if (setsockopt(s->fd, SOL_IPV6, IPV6_RECVPKTINFO, &y, sizeof(y)) < 0) |
| 369 |
ERR("IPV6_RECVPKTINFO");
|
| 370 |
|
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return 0; |
| 372 |
} |
| 373 |
|
| 374 |
static inline int |
| 375 |
sk_request_cmsg6_ttl(sock *s) |
| 376 |
{
|
| 377 |
int y = 1; |
| 378 |
|
| 379 |
if (setsockopt(s->fd, SOL_IPV6, IPV6_RECVHOPLIMIT, &y, sizeof(y)) < 0) |
| 380 |
ERR("IPV6_RECVHOPLIMIT");
|
| 381 |
|
| 382 |
return 0; |
| 383 |
} |
| 384 |
|
| 385 |
static inline void |
| 386 |
sk_process_cmsg6_pktinfo(sock *s, struct cmsghdr *cm)
|
| 387 |
{
|
| 388 |
if (cm->cmsg_type == IPV6_PKTINFO)
|
| 389 |
{
|
| 390 |
struct in6_pktinfo *pi = (struct in6_pktinfo *) CMSG_DATA(cm); |
| 391 |
s->laddr = ipa_from_in6(pi->ipi6_addr); |
| 392 |
s->lifindex = pi->ipi6_ifindex; |
| 393 |
} |
| 394 |
} |
| 395 |
|
| 396 |
static inline void |
| 397 |
sk_process_cmsg6_ttl(sock *s, struct cmsghdr *cm)
|
| 398 |
{
|
| 399 |
if (cm->cmsg_type == IPV6_HOPLIMIT)
|
| 400 |
s->rcv_ttl = * (int *) CMSG_DATA(cm);
|
| 401 |
} |
| 402 |
|
| 403 |
static inline void |
| 404 |
sk_prepare_cmsgs6(sock *s, struct msghdr *msg, void *cbuf, size_t cbuflen) |
| 405 |
{
|
| 406 |
struct cmsghdr *cm;
|
| 407 |
struct in6_pktinfo *pi;
|
| 408 |
int controllen = 0; |
| 409 |
|
| 410 |
msg->msg_control = cbuf; |
| 411 |
msg->msg_controllen = cbuflen; |
| 412 |
|
| 413 |
cm = CMSG_FIRSTHDR(msg); |
| 414 |
cm->cmsg_level = SOL_IPV6; |
| 415 |
cm->cmsg_type = IPV6_PKTINFO; |
| 416 |
cm->cmsg_len = CMSG_LEN(sizeof(*pi));
|
| 417 |
controllen += CMSG_SPACE(sizeof(*pi));
|
| 418 |
|
| 419 |
pi = (struct in6_pktinfo *) CMSG_DATA(cm);
|
| 420 |
pi->ipi6_ifindex = s->iface ? s->iface->index : 0;
|
| 421 |
pi->ipi6_addr = ipa_to_in6(s->saddr); |
| 422 |
|
| 423 |
msg->msg_controllen = controllen; |
| 424 |
} |
| 425 |
|
| 426 |
|
| 427 |
/*
|
| 428 |
* Miscellaneous socket syscalls
|
| 429 |
*/
|
| 430 |
|
| 431 |
static inline int |
| 432 |
sk_set_ttl4(sock *s, int ttl)
|
| 433 |
{
|
| 434 |
if (setsockopt(s->fd, SOL_IP, IP_TTL, &ttl, sizeof(ttl)) < 0) |
| 435 |
ERR("IP_TTL");
|
| 436 |
|
| 437 |
return 0; |
| 438 |
} |
| 439 |
|
| 440 |
static inline int |
| 441 |
sk_set_ttl6(sock *s, int ttl)
|
| 442 |
{
|
| 443 |
if (setsockopt(s->fd, SOL_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)) < 0) |
| 444 |
ERR("IPV6_UNICAST_HOPS");
|
| 445 |
|
| 446 |
return 0; |
| 447 |
} |
| 448 |
|
| 449 |
static inline int |
| 450 |
sk_set_tos4(sock *s, int tos)
|
| 451 |
{
|
| 452 |
if (setsockopt(s->fd, SOL_IP, IP_TOS, &tos, sizeof(tos)) < 0) |
| 453 |
ERR("IP_TOS");
|
| 454 |
|
| 455 |
return 0; |
| 456 |
} |
| 457 |
|
| 458 |
static inline int |
| 459 |
sk_set_tos6(sock *s, int tos)
|
| 460 |
{
|
| 461 |
if (setsockopt(s->fd, SOL_IPV6, IPV6_TCLASS, &tos, sizeof(tos)) < 0) |
| 462 |
ERR("IPV6_TCLASS");
|
| 463 |
|
| 464 |
return 0; |
| 465 |
} |
| 466 |
|
| 467 |
static inline int |
| 468 |
sk_set_high_port(sock *s UNUSED) |
| 469 |
{
|
| 470 |
/* Port range setting is optional, ignore it if not supported */
|
| 471 |
|
| 472 |
#ifdef IP_PORTRANGE
|
| 473 |
if (sk_is_ipv4(s))
|
| 474 |
{
|
| 475 |
int range = IP_PORTRANGE_HIGH;
|
| 476 |
if (setsockopt(s->fd, SOL_IP, IP_PORTRANGE, &range, sizeof(range)) < 0) |
| 477 |
ERR("IP_PORTRANGE");
|
| 478 |
} |
| 479 |
#endif
|
| 480 |
|
| 481 |
#ifdef IPV6_PORTRANGE
|
| 482 |
if (sk_is_ipv6(s))
|
| 483 |
{
|
| 484 |
int range = IPV6_PORTRANGE_HIGH;
|
| 485 |
if (setsockopt(s->fd, SOL_IPV6, IPV6_PORTRANGE, &range, sizeof(range)) < 0) |
| 486 |
ERR("IPV6_PORTRANGE");
|
| 487 |
} |
| 488 |
#endif
|
| 489 |
|
| 490 |
return 0; |
| 491 |
} |
| 492 |
|
| 493 |
static inline byte * |
| 494 |
sk_skip_ip_header(byte *pkt, int *len)
|
| 495 |
{
|
| 496 |
if ((*len < 20) || ((*pkt & 0xf0) != 0x40)) |
| 497 |
return NULL; |
| 498 |
|
| 499 |
int hlen = (*pkt & 0x0f) * 4; |
| 500 |
if ((hlen < 20) || (hlen > *len)) |
| 501 |
return NULL; |
| 502 |
|
| 503 |
*len -= hlen; |
| 504 |
return pkt + hlen;
|
| 505 |
} |
| 506 |
|
| 507 |
byte * |
| 508 |
sk_rx_buffer(sock *s, int *len)
|
| 509 |
{
|
| 510 |
if (sk_is_ipv4(s) && (s->type == SK_IP))
|
| 511 |
return sk_skip_ip_header(s->rbuf, len);
|
| 512 |
else
|
| 513 |
return s->rbuf;
|
| 514 |
} |
| 515 |
|
| 516 |
|
| 517 |
/*
|
| 518 |
* Public socket functions
|
| 519 |
*/
|
| 520 |
|
| 521 |
/**
|
| 522 |
* sk_setup_multicast - enable multicast for given socket
|
| 523 |
* @s: socket
|
| 524 |
*
|
| 525 |
* Prepare transmission of multicast packets for given datagram socket.
|
| 526 |
* The socket must have defined @iface.
|
| 527 |
*
|
| 528 |
* Result: 0 for success, -1 for an error.
|
| 529 |
*/
|
| 530 |
|
| 531 |
int
|
| 532 |
sk_setup_multicast(sock *s) |
| 533 |
{
|
| 534 |
ASSERT(s->iface); |
| 535 |
|
| 536 |
if (sk_is_ipv4(s))
|
| 537 |
return sk_setup_multicast4(s);
|
| 538 |
else
|
| 539 |
return sk_setup_multicast6(s);
|
| 540 |
} |
| 541 |
|
| 542 |
/**
|
| 543 |
* sk_join_group - join multicast group for given socket
|
| 544 |
* @s: socket
|
| 545 |
* @maddr: multicast address
|
| 546 |
*
|
| 547 |
* Join multicast group for given datagram socket and associated interface.
|
| 548 |
* The socket must have defined @iface.
|
| 549 |
*
|
| 550 |
* Result: 0 for success, -1 for an error.
|
| 551 |
*/
|
| 552 |
|
| 553 |
int
|
| 554 |
sk_join_group(sock *s, ip_addr maddr) |
| 555 |
{
|
| 556 |
if (sk_is_ipv4(s))
|
| 557 |
return sk_join_group4(s, maddr);
|
| 558 |
else
|
| 559 |
return sk_join_group6(s, maddr);
|
| 560 |
} |
| 561 |
|
| 562 |
/**
|
| 563 |
* sk_leave_group - leave multicast group for given socket
|
| 564 |
* @s: socket
|
| 565 |
* @maddr: multicast address
|
| 566 |
*
|
| 567 |
* Leave multicast group for given datagram socket and associated interface.
|
| 568 |
* The socket must have defined @iface.
|
| 569 |
*
|
| 570 |
* Result: 0 for success, -1 for an error.
|
| 571 |
*/
|
| 572 |
|
| 573 |
int
|
| 574 |
sk_leave_group(sock *s, ip_addr maddr) |
| 575 |
{
|
| 576 |
if (sk_is_ipv4(s))
|
| 577 |
return sk_leave_group4(s, maddr);
|
| 578 |
else
|
| 579 |
return sk_leave_group6(s, maddr);
|
| 580 |
} |
| 581 |
|
| 582 |
/**
|
| 583 |
* sk_setup_broadcast - enable broadcast for given socket
|
| 584 |
* @s: socket
|
| 585 |
*
|
| 586 |
* Allow reception and transmission of broadcast packets for given datagram
|
| 587 |
* socket. The socket must have defined @iface. For transmission, packets should
|
| 588 |
* be send to @brd address of @iface.
|
| 589 |
*
|
| 590 |
* Result: 0 for success, -1 for an error.
|
| 591 |
*/
|
| 592 |
|
| 593 |
int
|
| 594 |
sk_setup_broadcast(sock *s) |
| 595 |
{
|
| 596 |
int y = 1; |
| 597 |
|
| 598 |
if (setsockopt(s->fd, SOL_SOCKET, SO_BROADCAST, &y, sizeof(y)) < 0) |
| 599 |
ERR("SO_BROADCAST");
|
| 600 |
|
| 601 |
return 0; |
| 602 |
} |
| 603 |
|
| 604 |
/**
|
| 605 |
* sk_set_ttl - set transmit TTL for given socket
|
| 606 |
* @s: socket
|
| 607 |
* @ttl: TTL value
|
| 608 |
*
|
| 609 |
* Set TTL for already opened connections when TTL was not set before. Useful
|
| 610 |
* for accepted connections when different ones should have different TTL.
|
| 611 |
*
|
| 612 |
* Result: 0 for success, -1 for an error.
|
| 613 |
*/
|
| 614 |
|
| 615 |
int
|
| 616 |
sk_set_ttl(sock *s, int ttl)
|
| 617 |
{
|
| 618 |
s->ttl = ttl; |
| 619 |
|
| 620 |
if (sk_is_ipv4(s))
|
| 621 |
return sk_set_ttl4(s, ttl);
|
| 622 |
else
|
| 623 |
return sk_set_ttl6(s, ttl);
|
| 624 |
} |
| 625 |
|
| 626 |
/**
|
| 627 |
* sk_set_min_ttl - set minimal accepted TTL for given socket
|
| 628 |
* @s: socket
|
| 629 |
* @ttl: TTL value
|
| 630 |
*
|
| 631 |
* Set minimal accepted TTL for given socket. Can be used for TTL security.
|
| 632 |
* implementations.
|
| 633 |
*
|
| 634 |
* Result: 0 for success, -1 for an error.
|
| 635 |
*/
|
| 636 |
|
| 637 |
int
|
| 638 |
sk_set_min_ttl(sock *s, int ttl)
|
| 639 |
{
|
| 640 |
if (sk_is_ipv4(s))
|
| 641 |
return sk_set_min_ttl4(s, ttl);
|
| 642 |
else
|
| 643 |
return sk_set_min_ttl6(s, ttl);
|
| 644 |
} |
| 645 |
|
| 646 |
#if 0
|
| 647 |
/**
|
| 648 |
* sk_set_md5_auth - add / remove MD5 security association for given socket
|
| 649 |
* @s: socket
|
| 650 |
* @local: IP address of local side
|
| 651 |
* @remote: IP address of remote side
|
| 652 |
* @ifa: Interface for link-local IP address
|
| 653 |
* @passwd: Password used for MD5 authentication
|
| 654 |
* @setkey: Update also system SA/SP database
|
| 655 |
*
|
| 656 |
* In TCP MD5 handling code in kernel, there is a set of security associations
|
| 657 |
* used for choosing password and other authentication parameters according to
|
| 658 |
* the local and remote address. This function is useful for listening socket,
|
| 659 |
* for active sockets it may be enough to set s->password field.
|
| 660 |
*
|
| 661 |
* When called with passwd != NULL, the new pair is added,
|
| 662 |
* When called with passwd == NULL, the existing pair is removed.
|
| 663 |
*
|
| 664 |
* Note that while in Linux, the MD5 SAs are specific to socket, in BSD they are
|
| 665 |
* stored in global SA/SP database (but the behavior also must be enabled on
|
| 666 |
* per-socket basis). In case of multiple sockets to the same neighbor, the
|
| 667 |
* socket-specific state must be configured for each socket while global state
|
| 668 |
* just once per src-dst pair. The @setkey argument controls whether the global
|
| 669 |
* state (SA/SP database) is also updated.
|
| 670 |
*
|
| 671 |
* Result: 0 for success, -1 for an error.
|
| 672 |
*/
|
| 673 |
|
| 674 |
int
|
| 675 |
sk_set_md5_auth(sock *s, ip_addr local, ip_addr remote, struct iface *ifa, char *passwd, int setkey)
|
| 676 |
{ DUMMY; }
|
| 677 |
#endif
|
| 678 |
|
| 679 |
/**
|
| 680 |
* sk_set_ipv6_checksum - specify IPv6 checksum offset for given socket
|
| 681 |
* @s: socket
|
| 682 |
* @offset: offset
|
| 683 |
*
|
| 684 |
* Specify IPv6 checksum field offset for given raw IPv6 socket. After that, the
|
| 685 |
* kernel will automatically fill it for outgoing packets and check it for
|
| 686 |
* incoming packets. Should not be used on ICMPv6 sockets, where the position is
|
| 687 |
* known to the kernel.
|
| 688 |
*
|
| 689 |
* Result: 0 for success, -1 for an error.
|
| 690 |
*/
|
| 691 |
|
| 692 |
int
|
| 693 |
sk_set_ipv6_checksum(sock *s, int offset)
|
| 694 |
{
|
| 695 |
if (setsockopt(s->fd, SOL_IPV6, IPV6_CHECKSUM, &offset, sizeof(offset)) < 0) |
| 696 |
ERR("IPV6_CHECKSUM");
|
| 697 |
|
| 698 |
return 0; |
| 699 |
} |
| 700 |
|
| 701 |
int
|
| 702 |
sk_set_icmp6_filter(sock *s, int p1, int p2) |
| 703 |
{
|
| 704 |
/* a bit of lame interface, but it is here only for Radv */
|
| 705 |
struct icmp6_filter f;
|
| 706 |
|
| 707 |
ICMP6_FILTER_SETBLOCKALL(&f); |
| 708 |
ICMP6_FILTER_SETPASS(p1, &f); |
| 709 |
ICMP6_FILTER_SETPASS(p2, &f); |
| 710 |
|
| 711 |
if (setsockopt(s->fd, SOL_ICMPV6, ICMP6_FILTER, &f, sizeof(f)) < 0) |
| 712 |
ERR("ICMP6_FILTER");
|
| 713 |
|
| 714 |
return 0; |
| 715 |
} |
| 716 |
|
| 717 |
void
|
| 718 |
sk_log_error(sock *s, const char *p) |
| 719 |
{
|
| 720 |
log(L_ERR "%s: Socket error: %s%#m", p, s->err);
|
| 721 |
} |
| 722 |
|
| 723 |
|
| 724 |
/*
|
| 725 |
* Actual struct birdsock code
|
| 726 |
*/
|
| 727 |
|
| 728 |
static list sock_list;
|
| 729 |
static struct birdsock *current_sock; |
| 730 |
static struct birdsock *stored_sock; |
| 731 |
|
| 732 |
static inline sock * |
| 733 |
sk_next(sock *s) |
| 734 |
{
|
| 735 |
if (!s->n.next->next)
|
| 736 |
return NULL; |
| 737 |
else
|
| 738 |
return SKIP_BACK(sock, n, s->n.next);
|
| 739 |
} |
| 740 |
|
| 741 |
static void |
| 742 |
sk_alloc_bufs(sock *s) |
| 743 |
{
|
| 744 |
if (!s->rbuf && s->rbsize)
|
| 745 |
s->rbuf = s->rbuf_alloc = xmalloc(s->rbsize); |
| 746 |
s->rpos = s->rbuf; |
| 747 |
if (!s->tbuf && s->tbsize)
|
| 748 |
s->tbuf = s->tbuf_alloc = xmalloc(s->tbsize); |
| 749 |
s->tpos = s->ttx = s->tbuf; |
| 750 |
} |
| 751 |
|
| 752 |
static void |
| 753 |
sk_free_bufs(sock *s) |
| 754 |
{
|
| 755 |
if (s->rbuf_alloc)
|
| 756 |
{
|
| 757 |
xfree(s->rbuf_alloc); |
| 758 |
s->rbuf = s->rbuf_alloc = NULL;
|
| 759 |
} |
| 760 |
if (s->tbuf_alloc)
|
| 761 |
{
|
| 762 |
xfree(s->tbuf_alloc); |
| 763 |
s->tbuf = s->tbuf_alloc = NULL;
|
| 764 |
} |
| 765 |
} |
| 766 |
|
| 767 |
#ifdef HAVE_LIBSSH
|
| 768 |
static void |
| 769 |
sk_ssh_free(sock *s) |
| 770 |
{
|
| 771 |
struct ssh_sock *ssh = s->ssh;
|
| 772 |
|
| 773 |
if (s->ssh == NULL) |
| 774 |
return;
|
| 775 |
|
| 776 |
s->ssh = NULL;
|
| 777 |
|
| 778 |
if (ssh->channel)
|
| 779 |
{
|
| 780 |
if (ssh_channel_is_open(ssh->channel))
|
| 781 |
ssh_channel_close(ssh->channel); |
| 782 |
ssh_channel_free(ssh->channel); |
| 783 |
ssh->channel = NULL;
|
| 784 |
} |
| 785 |
|
| 786 |
if (ssh->session)
|
| 787 |
{
|
| 788 |
ssh_disconnect(ssh->session); |
| 789 |
ssh_free(ssh->session); |
| 790 |
ssh->session = NULL;
|
| 791 |
} |
| 792 |
} |
| 793 |
#endif
|
| 794 |
|
| 795 |
static void |
| 796 |
sk_free(resource *r) |
| 797 |
{
|
| 798 |
sock *s = (sock *) r; |
| 799 |
|
| 800 |
sk_free_bufs(s); |
| 801 |
|
| 802 |
#ifdef HAVE_LIBSSH
|
| 803 |
if (s->type == SK_SSH || s->type == SK_SSH_ACTIVE)
|
| 804 |
sk_ssh_free(s); |
| 805 |
#endif
|
| 806 |
|
| 807 |
if (s->fd < 0) |
| 808 |
return;
|
| 809 |
|
| 810 |
/* FIXME: we should call sk_stop() for SKF_THREAD sockets */
|
| 811 |
if (!(s->flags & SKF_THREAD))
|
| 812 |
{
|
| 813 |
if (s == current_sock)
|
| 814 |
current_sock = sk_next(s); |
| 815 |
if (s == stored_sock)
|
| 816 |
stored_sock = sk_next(s); |
| 817 |
rem_node(&s->n); |
| 818 |
} |
| 819 |
|
| 820 |
if (s->type != SK_SSH && s->type != SK_SSH_ACTIVE)
|
| 821 |
close(s->fd); |
| 822 |
|
| 823 |
s->fd = -1;
|
| 824 |
} |
| 825 |
|
| 826 |
void
|
| 827 |
sk_set_rbsize(sock *s, uint val) |
| 828 |
{
|
| 829 |
ASSERT(s->rbuf_alloc == s->rbuf); |
| 830 |
|
| 831 |
if (s->rbsize == val)
|
| 832 |
return;
|
| 833 |
|
| 834 |
s->rbsize = val; |
| 835 |
xfree(s->rbuf_alloc); |
| 836 |
s->rbuf_alloc = xmalloc(val); |
| 837 |
s->rpos = s->rbuf = s->rbuf_alloc; |
| 838 |
} |
| 839 |
|
| 840 |
void
|
| 841 |
sk_set_tbsize(sock *s, uint val) |
| 842 |
{
|
| 843 |
ASSERT(s->tbuf_alloc == s->tbuf); |
| 844 |
|
| 845 |
if (s->tbsize == val)
|
| 846 |
return;
|
| 847 |
|
| 848 |
byte *old_tbuf = s->tbuf; |
| 849 |
|
| 850 |
s->tbsize = val; |
| 851 |
s->tbuf = s->tbuf_alloc = xrealloc(s->tbuf_alloc, val); |
| 852 |
s->tpos = s->tbuf + (s->tpos - old_tbuf); |
| 853 |
s->ttx = s->tbuf + (s->ttx - old_tbuf); |
| 854 |
} |
| 855 |
|
| 856 |
void
|
| 857 |
sk_set_tbuf(sock *s, void *tbuf)
|
| 858 |
{
|
| 859 |
s->tbuf = tbuf ?: s->tbuf_alloc; |
| 860 |
s->ttx = s->tpos = s->tbuf; |
| 861 |
} |
| 862 |
|
| 863 |
void
|
| 864 |
sk_reallocate(sock *s) |
| 865 |
{
|
| 866 |
sk_free_bufs(s); |
| 867 |
sk_alloc_bufs(s); |
| 868 |
} |
| 869 |
|
| 870 |
static void |
| 871 |
sk_dump(resource *r) |
| 872 |
{
|
| 873 |
sock *s = (sock *) r; |
| 874 |
static char *sk_type_names[] = { "TCP<", "TCP>", "TCP", "UDP", NULL, "IP", NULL, "MAGIC", "UNIX<", "UNIX", "SSH>", "SSH", "DEL!" }; |
| 875 |
|
| 876 |
debug("(%s, ud=%p, sa=%I, sp=%d, da=%I, dp=%d, tos=%d, ttl=%d, if=%s)\n",
|
| 877 |
sk_type_names[s->type], |
| 878 |
s->data, |
| 879 |
s->saddr, |
| 880 |
s->sport, |
| 881 |
s->daddr, |
| 882 |
s->dport, |
| 883 |
s->tos, |
| 884 |
s->ttl, |
| 885 |
s->iface ? s->iface->name : "none");
|
| 886 |
} |
| 887 |
|
| 888 |
static struct resclass sk_class = { |
| 889 |
"Socket",
|
| 890 |
sizeof(sock),
|
| 891 |
sk_free, |
| 892 |
sk_dump, |
| 893 |
NULL,
|
| 894 |
NULL
|
| 895 |
}; |
| 896 |
|
| 897 |
/**
|
| 898 |
* sk_new - create a socket
|
| 899 |
* @p: pool
|
| 900 |
*
|
| 901 |
* This function creates a new socket resource. If you want to use it,
|
| 902 |
* you need to fill in all the required fields of the structure and
|
| 903 |
* call sk_open() to do the actual opening of the socket.
|
| 904 |
*
|
| 905 |
* The real function name is sock_new(), sk_new() is a macro wrapper
|
| 906 |
* to avoid collision with OpenSSL.
|
| 907 |
*/
|
| 908 |
sock * |
| 909 |
sock_new(pool *p) |
| 910 |
{
|
| 911 |
sock *s = ralloc(p, &sk_class); |
| 912 |
s->pool = p; |
| 913 |
// s->saddr = s->daddr = IPA_NONE;
|
| 914 |
s->tos = s->priority = s->ttl = -1;
|
| 915 |
s->fd = -1;
|
| 916 |
return s;
|
| 917 |
} |
| 918 |
|
| 919 |
static int |
| 920 |
sk_setup(sock *s) |
| 921 |
{
|
| 922 |
int y = 1; |
| 923 |
int fd = s->fd;
|
| 924 |
|
| 925 |
if (s->type == SK_SSH_ACTIVE)
|
| 926 |
return 0; |
| 927 |
|
| 928 |
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) |
| 929 |
ERR("O_NONBLOCK");
|
| 930 |
|
| 931 |
if (!s->af)
|
| 932 |
return 0; |
| 933 |
|
| 934 |
if (ipa_nonzero(s->saddr) && !(s->flags & SKF_BIND))
|
| 935 |
s->flags |= SKF_PKTINFO; |
| 936 |
|
| 937 |
#ifdef CONFIG_USE_HDRINCL
|
| 938 |
if (sk_is_ipv4(s) && (s->type == SK_IP) && (s->flags & SKF_PKTINFO))
|
| 939 |
{
|
| 940 |
s->flags &= ~SKF_PKTINFO; |
| 941 |
s->flags |= SKF_HDRINCL; |
| 942 |
if (setsockopt(fd, SOL_IP, IP_HDRINCL, &y, sizeof(y)) < 0) |
| 943 |
ERR("IP_HDRINCL");
|
| 944 |
} |
| 945 |
#endif
|
| 946 |
|
| 947 |
if (s->vrf && !s->iface)
|
| 948 |
{
|
| 949 |
/* Bind socket to associated VRF interface.
|
| 950 |
This is Linux-specific, but so is SO_BINDTODEVICE. */
|
| 951 |
#ifdef SO_BINDTODEVICE
|
| 952 |
struct ifreq ifr = {};
|
| 953 |
strcpy(ifr.ifr_name, s->vrf->name); |
| 954 |
if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0) |
| 955 |
ERR("SO_BINDTODEVICE");
|
| 956 |
#endif
|
| 957 |
} |
| 958 |
|
| 959 |
if (s->iface)
|
| 960 |
{
|
| 961 |
#ifdef SO_BINDTODEVICE
|
| 962 |
struct ifreq ifr = {};
|
| 963 |
strcpy(ifr.ifr_name, s->iface->name); |
| 964 |
if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0) |
| 965 |
ERR("SO_BINDTODEVICE");
|
| 966 |
#endif
|
| 967 |
|
| 968 |
#ifdef CONFIG_UNIX_DONTROUTE
|
| 969 |
if (setsockopt(s->fd, SOL_SOCKET, SO_DONTROUTE, &y, sizeof(y)) < 0) |
| 970 |
ERR("SO_DONTROUTE");
|
| 971 |
#endif
|
| 972 |
} |
| 973 |
|
| 974 |
if (sk_is_ipv4(s))
|
| 975 |
{
|
| 976 |
if (s->flags & SKF_LADDR_RX)
|
| 977 |
if (sk_request_cmsg4_pktinfo(s) < 0) |
| 978 |
return -1; |
| 979 |
|
| 980 |
if (s->flags & SKF_TTL_RX)
|
| 981 |
if (sk_request_cmsg4_ttl(s) < 0) |
| 982 |
return -1; |
| 983 |
|
| 984 |
if ((s->type == SK_UDP) || (s->type == SK_IP))
|
| 985 |
if (sk_disable_mtu_disc4(s) < 0) |
| 986 |
return -1; |
| 987 |
|
| 988 |
if (s->ttl >= 0) |
| 989 |
if (sk_set_ttl4(s, s->ttl) < 0) |
| 990 |
return -1; |
| 991 |
|
| 992 |
if (s->tos >= 0) |
| 993 |
if (sk_set_tos4(s, s->tos) < 0) |
| 994 |
return -1; |
| 995 |
} |
| 996 |
|
| 997 |
if (sk_is_ipv6(s))
|
| 998 |
{
|
| 999 |
if ((s->type == SK_TCP_PASSIVE) || (s->type == SK_TCP_ACTIVE) || (s->type == SK_UDP))
|
| 1000 |
if (setsockopt(fd, SOL_IPV6, IPV6_V6ONLY, &y, sizeof(y)) < 0) |
| 1001 |
ERR("IPV6_V6ONLY");
|
| 1002 |
|
| 1003 |
if (s->flags & SKF_LADDR_RX)
|
| 1004 |
if (sk_request_cmsg6_pktinfo(s) < 0) |
| 1005 |
return -1; |
| 1006 |
|
| 1007 |
if (s->flags & SKF_TTL_RX)
|
| 1008 |
if (sk_request_cmsg6_ttl(s) < 0) |
| 1009 |
return -1; |
| 1010 |
|
| 1011 |
if ((s->type == SK_UDP) || (s->type == SK_IP))
|
| 1012 |
if (sk_disable_mtu_disc6(s) < 0) |
| 1013 |
return -1; |
| 1014 |
|
| 1015 |
if (s->ttl >= 0) |
| 1016 |
if (sk_set_ttl6(s, s->ttl) < 0) |
| 1017 |
return -1; |
| 1018 |
|
| 1019 |
if (s->tos >= 0) |
| 1020 |
if (sk_set_tos6(s, s->tos) < 0) |
| 1021 |
return -1; |
| 1022 |
} |
| 1023 |
|
| 1024 |
/* Must be after sk_set_tos4() as setting ToS on Linux also mangles priority */
|
| 1025 |
if (s->priority >= 0) |
| 1026 |
if (sk_set_priority(s, s->priority) < 0) |
| 1027 |
return -1; |
| 1028 |
|
| 1029 |
return 0; |
| 1030 |
} |
| 1031 |
|
| 1032 |
static void |
| 1033 |
sk_insert(sock *s) |
| 1034 |
{
|
| 1035 |
add_tail(&sock_list, &s->n); |
| 1036 |
} |
| 1037 |
|
| 1038 |
static void |
| 1039 |
sk_tcp_connected(sock *s) |
| 1040 |
{
|
| 1041 |
sockaddr sa; |
| 1042 |
int sa_len = sizeof(sa); |
| 1043 |
|
| 1044 |
if ((getsockname(s->fd, &sa.sa, &sa_len) < 0) || |
| 1045 |
(sockaddr_read(&sa, s->af, &s->saddr, &s->iface, &s->sport) < 0))
|
| 1046 |
log(L_WARN "SOCK: Cannot get local IP address for TCP>");
|
| 1047 |
|
| 1048 |
s->type = SK_TCP; |
| 1049 |
sk_alloc_bufs(s); |
| 1050 |
s->tx_hook(s); |
| 1051 |
} |
| 1052 |
|
| 1053 |
#ifdef HAVE_LIBSSH
|
| 1054 |
static void |
| 1055 |
sk_ssh_connected(sock *s) |
| 1056 |
{
|
| 1057 |
sk_alloc_bufs(s); |
| 1058 |
s->type = SK_SSH; |
| 1059 |
s->tx_hook(s); |
| 1060 |
} |
| 1061 |
#endif
|
| 1062 |
|
| 1063 |
static int |
| 1064 |
sk_passive_connected(sock *s, int type)
|
| 1065 |
{
|
| 1066 |
sockaddr loc_sa, rem_sa; |
| 1067 |
int loc_sa_len = sizeof(loc_sa); |
| 1068 |
int rem_sa_len = sizeof(rem_sa); |
| 1069 |
|
| 1070 |
int fd = accept(s->fd, ((type == SK_TCP) ? &rem_sa.sa : NULL), &rem_sa_len); |
| 1071 |
if (fd < 0) |
| 1072 |
{
|
| 1073 |
if ((errno != EINTR) && (errno != EAGAIN))
|
| 1074 |
s->err_hook(s, errno); |
| 1075 |
return 0; |
| 1076 |
} |
| 1077 |
|
| 1078 |
sock *t = sk_new(s->pool); |
| 1079 |
t->type = type; |
| 1080 |
t->data = s->data; |
| 1081 |
t->af = s->af; |
| 1082 |
t->fd = fd; |
| 1083 |
t->ttl = s->ttl; |
| 1084 |
t->tos = s->tos; |
| 1085 |
t->vrf = s->vrf; |
| 1086 |
t->rbsize = s->rbsize; |
| 1087 |
t->tbsize = s->tbsize; |
| 1088 |
|
| 1089 |
if (type == SK_TCP)
|
| 1090 |
{
|
| 1091 |
if ((getsockname(fd, &loc_sa.sa, &loc_sa_len) < 0) || |
| 1092 |
(sockaddr_read(&loc_sa, s->af, &t->saddr, &t->iface, &t->sport) < 0))
|
| 1093 |
log(L_WARN "SOCK: Cannot get local IP address for TCP<");
|
| 1094 |
|
| 1095 |
if (sockaddr_read(&rem_sa, s->af, &t->daddr, &t->iface, &t->dport) < 0) |
| 1096 |
log(L_WARN "SOCK: Cannot get remote IP address for TCP<");
|
| 1097 |
} |
| 1098 |
|
| 1099 |
if (sk_setup(t) < 0) |
| 1100 |
{
|
| 1101 |
/* FIXME: Call err_hook instead ? */
|
| 1102 |
log(L_ERR "SOCK: Incoming connection: %s%#m", t->err);
|
| 1103 |
|
| 1104 |
/* FIXME: handle it better in rfree() */
|
| 1105 |
close(t->fd); |
| 1106 |
t->fd = -1;
|
| 1107 |
rfree(t); |
| 1108 |
return 1; |
| 1109 |
} |
| 1110 |
|
| 1111 |
sk_insert(t); |
| 1112 |
sk_alloc_bufs(t); |
| 1113 |
s->rx_hook(t, 0);
|
| 1114 |
return 1; |
| 1115 |
} |
| 1116 |
|
| 1117 |
#ifdef HAVE_LIBSSH
|
| 1118 |
/*
|
| 1119 |
* Return SSH_OK or SSH_AGAIN or SSH_ERROR
|
| 1120 |
*/
|
| 1121 |
static int |
| 1122 |
sk_ssh_connect(sock *s) |
| 1123 |
{
|
| 1124 |
s->fd = ssh_get_fd(s->ssh->session); |
| 1125 |
|
| 1126 |
/* Big fall thru automata */
|
| 1127 |
switch (s->ssh->state)
|
| 1128 |
{
|
| 1129 |
case SK_SSH_CONNECT:
|
| 1130 |
{
|
| 1131 |
switch (ssh_connect(s->ssh->session))
|
| 1132 |
{
|
| 1133 |
case SSH_AGAIN:
|
| 1134 |
/* A quick look into libSSH shows that ssh_get_fd() should return non-(-1)
|
| 1135 |
* after SSH_AGAIN is returned by ssh_connect(). This is however nowhere
|
| 1136 |
* documented but our code relies on that.
|
| 1137 |
*/
|
| 1138 |
return SSH_AGAIN;
|
| 1139 |
|
| 1140 |
case SSH_OK:
|
| 1141 |
break;
|
| 1142 |
|
| 1143 |
default:
|
| 1144 |
return SSH_ERROR;
|
| 1145 |
} |
| 1146 |
} /* fallthrough */
|
| 1147 |
|
| 1148 |
case SK_SSH_SERVER_KNOWN:
|
| 1149 |
{
|
| 1150 |
s->ssh->state = SK_SSH_SERVER_KNOWN; |
| 1151 |
|
| 1152 |
if (s->ssh->server_hostkey_path)
|
| 1153 |
{
|
| 1154 |
int server_identity_is_ok = 1; |
| 1155 |
|
| 1156 |
/* Check server identity */
|
| 1157 |
switch (ssh_is_server_known(s->ssh->session))
|
| 1158 |
{
|
| 1159 |
#define LOG_WARN_ABOUT_SSH_SERVER_VALIDATION(s,msg,args...) log(L_WARN "SSH Identity %s@%s:%u: " msg, (s)->ssh->username, (s)->host, (s)->dport, ## args); |
| 1160 |
case SSH_SERVER_KNOWN_OK:
|
| 1161 |
/* The server is known and has not changed. */
|
| 1162 |
break;
|
| 1163 |
|
| 1164 |
case SSH_SERVER_NOT_KNOWN:
|
| 1165 |
LOG_WARN_ABOUT_SSH_SERVER_VALIDATION(s, "The server is unknown, its public key was not found in the known host file %s", s->ssh->server_hostkey_path);
|
| 1166 |
break;
|
| 1167 |
|
| 1168 |
case SSH_SERVER_KNOWN_CHANGED:
|
| 1169 |
LOG_WARN_ABOUT_SSH_SERVER_VALIDATION(s, "The server key has changed. Either you are under attack or the administrator changed the key.");
|
| 1170 |
server_identity_is_ok = 0;
|
| 1171 |
break;
|
| 1172 |
|
| 1173 |
case SSH_SERVER_FILE_NOT_FOUND:
|
| 1174 |
LOG_WARN_ABOUT_SSH_SERVER_VALIDATION(s, "The known host file %s does not exist", s->ssh->server_hostkey_path);
|
| 1175 |
server_identity_is_ok = 0;
|
| 1176 |
break;
|
| 1177 |
|
| 1178 |
case SSH_SERVER_ERROR:
|
| 1179 |
LOG_WARN_ABOUT_SSH_SERVER_VALIDATION(s, "Some error happened");
|
| 1180 |
server_identity_is_ok = 0;
|
| 1181 |
break;
|
| 1182 |
|
| 1183 |
case SSH_SERVER_FOUND_OTHER:
|
| 1184 |
LOG_WARN_ABOUT_SSH_SERVER_VALIDATION(s, "The server gave use a key of a type while we had an other type recorded. " \
|
| 1185 |
"It is a possible attack.");
|
| 1186 |
server_identity_is_ok = 0;
|
| 1187 |
break;
|
| 1188 |
} |
| 1189 |
|
| 1190 |
if (!server_identity_is_ok)
|
| 1191 |
return SSH_ERROR;
|
| 1192 |
} |
| 1193 |
} /* fallthrough */
|
| 1194 |
|
| 1195 |
case SK_SSH_USERAUTH:
|
| 1196 |
{
|
| 1197 |
s->ssh->state = SK_SSH_USERAUTH; |
| 1198 |
switch (ssh_userauth_publickey_auto(s->ssh->session, NULL, NULL)) |
| 1199 |
{
|
| 1200 |
case SSH_AUTH_AGAIN:
|
| 1201 |
return SSH_AGAIN;
|
| 1202 |
|
| 1203 |
case SSH_AUTH_SUCCESS:
|
| 1204 |
break;
|
| 1205 |
|
| 1206 |
default:
|
| 1207 |
return SSH_ERROR;
|
| 1208 |
} |
| 1209 |
} /* fallthrough */
|
| 1210 |
|
| 1211 |
case SK_SSH_CHANNEL:
|
| 1212 |
{
|
| 1213 |
s->ssh->state = SK_SSH_CHANNEL; |
| 1214 |
s->ssh->channel = ssh_channel_new(s->ssh->session); |
| 1215 |
if (s->ssh->channel == NULL) |
| 1216 |
return SSH_ERROR;
|
| 1217 |
} /* fallthrough */
|
| 1218 |
|
| 1219 |
case SK_SSH_SESSION:
|
| 1220 |
{
|
| 1221 |
s->ssh->state = SK_SSH_SESSION; |
| 1222 |
switch (ssh_channel_open_session(s->ssh->channel))
|
| 1223 |
{
|
| 1224 |
case SSH_AGAIN:
|
| 1225 |
return SSH_AGAIN;
|
| 1226 |
|
| 1227 |
case SSH_OK:
|
| 1228 |
break;
|
| 1229 |
|
| 1230 |
default:
|
| 1231 |
return SSH_ERROR;
|
| 1232 |
} |
| 1233 |
} /* fallthrough */
|
| 1234 |
|
| 1235 |
case SK_SSH_SUBSYSTEM:
|
| 1236 |
{
|
| 1237 |
s->ssh->state = SK_SSH_SUBSYSTEM; |
| 1238 |
if (s->ssh->subsystem)
|
| 1239 |
{
|
| 1240 |
switch (ssh_channel_request_subsystem(s->ssh->channel, s->ssh->subsystem))
|
| 1241 |
{
|
| 1242 |
case SSH_AGAIN:
|
| 1243 |
return SSH_AGAIN;
|
| 1244 |
|
| 1245 |
case SSH_OK:
|
| 1246 |
break;
|
| 1247 |
|
| 1248 |
default:
|
| 1249 |
return SSH_ERROR;
|
| 1250 |
} |
| 1251 |
} |
| 1252 |
} /* fallthrough */
|
| 1253 |
|
| 1254 |
case SK_SSH_ESTABLISHED:
|
| 1255 |
s->ssh->state = SK_SSH_ESTABLISHED; |
| 1256 |
} |
| 1257 |
|
| 1258 |
return SSH_OK;
|
| 1259 |
} |
| 1260 |
|
| 1261 |
/*
|
| 1262 |
* Return file descriptor number if success
|
| 1263 |
* Return -1 if failed
|
| 1264 |
*/
|
| 1265 |
static int |
| 1266 |
sk_open_ssh(sock *s) |
| 1267 |
{
|
| 1268 |
if (!s->ssh)
|
| 1269 |
bug("sk_open() sock->ssh is not allocated");
|
| 1270 |
|
| 1271 |
ssh_session sess = ssh_new(); |
| 1272 |
if (sess == NULL) |
| 1273 |
ERR2("Cannot create a ssh session");
|
| 1274 |
s->ssh->session = sess; |
| 1275 |
|
| 1276 |
const int verbosity = SSH_LOG_NOLOG; |
| 1277 |
ssh_options_set(sess, SSH_OPTIONS_LOG_VERBOSITY, &verbosity); |
| 1278 |
ssh_options_set(sess, SSH_OPTIONS_HOST, s->host); |
| 1279 |
ssh_options_set(sess, SSH_OPTIONS_PORT, &(s->dport)); |
| 1280 |
/* TODO: Add SSH_OPTIONS_BINDADDR */
|
| 1281 |
ssh_options_set(sess, SSH_OPTIONS_USER, s->ssh->username); |
| 1282 |
|
| 1283 |
if (s->ssh->server_hostkey_path)
|
| 1284 |
ssh_options_set(sess, SSH_OPTIONS_KNOWNHOSTS, s->ssh->server_hostkey_path); |
| 1285 |
|
| 1286 |
if (s->ssh->client_privkey_path)
|
| 1287 |
ssh_options_set(sess, SSH_OPTIONS_IDENTITY, s->ssh->client_privkey_path); |
| 1288 |
|
| 1289 |
ssh_set_blocking(sess, 0);
|
| 1290 |
|
| 1291 |
switch (sk_ssh_connect(s))
|
| 1292 |
{
|
| 1293 |
case SSH_AGAIN:
|
| 1294 |
break;
|
| 1295 |
|
| 1296 |
case SSH_OK:
|
| 1297 |
sk_ssh_connected(s); |
| 1298 |
break;
|
| 1299 |
|
| 1300 |
case SSH_ERROR:
|
| 1301 |
ERR2(ssh_get_error(sess)); |
| 1302 |
break;
|
| 1303 |
} |
| 1304 |
|
| 1305 |
return ssh_get_fd(sess);
|
| 1306 |
|
| 1307 |
err:
|
| 1308 |
return -1; |
| 1309 |
} |
| 1310 |
#endif
|
| 1311 |
|
| 1312 |
/**
|
| 1313 |
* sk_open - open a socket
|
| 1314 |
* @s: socket
|
| 1315 |
*
|
| 1316 |
* This function takes a socket resource created by sk_new() and
|
| 1317 |
* initialized by the user and binds a corresponding network connection
|
| 1318 |
* to it.
|
| 1319 |
*
|
| 1320 |
* Result: 0 for success, -1 for an error.
|
| 1321 |
*/
|
| 1322 |
int
|
| 1323 |
sk_open(sock *s) |
| 1324 |
{
|
| 1325 |
int af = AF_UNSPEC;
|
| 1326 |
int fd = -1; |
| 1327 |
int do_bind = 0; |
| 1328 |
int bind_port = 0; |
| 1329 |
ip_addr bind_addr = IPA_NONE; |
| 1330 |
sockaddr sa; |
| 1331 |
|
| 1332 |
if (s->type <= SK_IP)
|
| 1333 |
{
|
| 1334 |
/*
|
| 1335 |
* For TCP/IP sockets, Address family (IPv4 or IPv6) can be specified either
|
| 1336 |
* explicitly (SK_IPV4 or SK_IPV6) or implicitly (based on saddr, daddr).
|
| 1337 |
* But the specifications have to be consistent.
|
| 1338 |
*/
|
| 1339 |
|
| 1340 |
switch (s->subtype)
|
| 1341 |
{
|
| 1342 |
case 0: |
| 1343 |
ASSERT(ipa_zero(s->saddr) || ipa_zero(s->daddr) || |
| 1344 |
(ipa_is_ip4(s->saddr) == ipa_is_ip4(s->daddr))); |
| 1345 |
af = (ipa_is_ip4(s->saddr) || ipa_is_ip4(s->daddr)) ? AF_INET : AF_INET6; |
| 1346 |
break;
|
| 1347 |
|
| 1348 |
case SK_IPV4:
|
| 1349 |
ASSERT(ipa_zero(s->saddr) || ipa_is_ip4(s->saddr)); |
| 1350 |
ASSERT(ipa_zero(s->daddr) || ipa_is_ip4(s->daddr)); |
| 1351 |
af = AF_INET; |
| 1352 |
break;
|
| 1353 |
|
| 1354 |
case SK_IPV6:
|
| 1355 |
ASSERT(ipa_zero(s->saddr) || !ipa_is_ip4(s->saddr)); |
| 1356 |
ASSERT(ipa_zero(s->daddr) || !ipa_is_ip4(s->daddr)); |
| 1357 |
af = AF_INET6; |
| 1358 |
break;
|
| 1359 |
|
| 1360 |
default:
|
| 1361 |
bug("Invalid subtype %d", s->subtype);
|
| 1362 |
} |
| 1363 |
} |
| 1364 |
|
| 1365 |
switch (s->type)
|
| 1366 |
{
|
| 1367 |
case SK_TCP_ACTIVE:
|
| 1368 |
s->ttx = ""; /* Force s->ttx != s->tpos */ |
| 1369 |
/* Fall thru */
|
| 1370 |
case SK_TCP_PASSIVE:
|
| 1371 |
fd = socket(af, SOCK_STREAM, IPPROTO_TCP); |
| 1372 |
bind_port = s->sport; |
| 1373 |
bind_addr = s->saddr; |
| 1374 |
do_bind = bind_port || ipa_nonzero(bind_addr); |
| 1375 |
break;
|
| 1376 |
|
| 1377 |
#ifdef HAVE_LIBSSH
|
| 1378 |
case SK_SSH_ACTIVE:
|
| 1379 |
s->ttx = ""; /* Force s->ttx != s->tpos */ |
| 1380 |
fd = sk_open_ssh(s); |
| 1381 |
break;
|
| 1382 |
#endif
|
| 1383 |
|
| 1384 |
case SK_UDP:
|
| 1385 |
fd = socket(af, SOCK_DGRAM, IPPROTO_UDP); |
| 1386 |
bind_port = s->sport; |
| 1387 |
bind_addr = (s->flags & SKF_BIND) ? s->saddr : IPA_NONE; |
| 1388 |
do_bind = 1;
|
| 1389 |
break;
|
| 1390 |
|
| 1391 |
case SK_IP:
|
| 1392 |
fd = socket(af, SOCK_RAW, s->dport); |
| 1393 |
bind_port = 0;
|
| 1394 |
bind_addr = (s->flags & SKF_BIND) ? s->saddr : IPA_NONE; |
| 1395 |
do_bind = ipa_nonzero(bind_addr); |
| 1396 |
break;
|
| 1397 |
|
| 1398 |
case SK_MAGIC:
|
| 1399 |
af = 0;
|
| 1400 |
fd = s->fd; |
| 1401 |
break;
|
| 1402 |
|
| 1403 |
default:
|
| 1404 |
bug("sk_open() called for invalid sock type %d", s->type);
|
| 1405 |
} |
| 1406 |
|
| 1407 |
if (fd < 0) |
| 1408 |
ERR("socket");
|
| 1409 |
|
| 1410 |
s->af = af; |
| 1411 |
s->fd = fd; |
| 1412 |
|
| 1413 |
if (sk_setup(s) < 0) |
| 1414 |
goto err;
|
| 1415 |
|
| 1416 |
if (do_bind)
|
| 1417 |
{
|
| 1418 |
if (bind_port)
|
| 1419 |
{
|
| 1420 |
int y = 1; |
| 1421 |
|
| 1422 |
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &y, sizeof(y)) < 0) |
| 1423 |
ERR2("SO_REUSEADDR");
|
| 1424 |
|
| 1425 |
#ifdef CONFIG_NO_IFACE_BIND
|
| 1426 |
/* Workaround missing ability to bind to an iface */
|
| 1427 |
if ((s->type == SK_UDP) && s->iface && ipa_zero(bind_addr))
|
| 1428 |
{
|
| 1429 |
if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &y, sizeof(y)) < 0) |
| 1430 |
ERR2("SO_REUSEPORT");
|
| 1431 |
} |
| 1432 |
#endif
|
| 1433 |
} |
| 1434 |
else
|
| 1435 |
if (s->flags & SKF_HIGH_PORT)
|
| 1436 |
if (sk_set_high_port(s) < 0) |
| 1437 |
log(L_WARN "Socket error: %s%#m", s->err);
|
| 1438 |
|
| 1439 |
sockaddr_fill(&sa, s->af, bind_addr, s->iface, bind_port); |
| 1440 |
if (bind(fd, &sa.sa, SA_LEN(sa)) < 0) |
| 1441 |
ERR2("bind");
|
| 1442 |
} |
| 1443 |
|
| 1444 |
if (s->password)
|
| 1445 |
if (sk_set_md5_auth(s, s->saddr, s->daddr, s->iface, s->password, 0) < 0) |
| 1446 |
goto err;
|
| 1447 |
|
| 1448 |
switch (s->type)
|
| 1449 |
{
|
| 1450 |
case SK_TCP_ACTIVE:
|
| 1451 |
sockaddr_fill(&sa, s->af, s->daddr, s->iface, s->dport); |
| 1452 |
if (connect(fd, &sa.sa, SA_LEN(sa)) >= 0) |
| 1453 |
sk_tcp_connected(s); |
| 1454 |
else if (errno != EINTR && errno != EAGAIN && errno != EINPROGRESS && |
| 1455 |
errno != ECONNREFUSED && errno != EHOSTUNREACH && errno != ENETUNREACH) |
| 1456 |
ERR2("connect");
|
| 1457 |
break;
|
| 1458 |
|
| 1459 |
case SK_TCP_PASSIVE:
|
| 1460 |
if (listen(fd, 8) < 0) |
| 1461 |
ERR2("listen");
|
| 1462 |
break;
|
| 1463 |
|
| 1464 |
case SK_SSH_ACTIVE:
|
| 1465 |
case SK_MAGIC:
|
| 1466 |
break;
|
| 1467 |
|
| 1468 |
default:
|
| 1469 |
sk_alloc_bufs(s); |
| 1470 |
} |
| 1471 |
|
| 1472 |
if (!(s->flags & SKF_THREAD))
|
| 1473 |
sk_insert(s); |
| 1474 |
|
| 1475 |
return 0; |
| 1476 |
|
| 1477 |
err:
|
| 1478 |
close(fd); |
| 1479 |
s->fd = -1;
|
| 1480 |
return -1; |
| 1481 |
} |
| 1482 |
|
| 1483 |
int
|
| 1484 |
sk_open_unix(sock *s, char *name)
|
| 1485 |
{
|
| 1486 |
struct sockaddr_un sa;
|
| 1487 |
int fd;
|
| 1488 |
|
| 1489 |
/* We are sloppy during error (leak fd and not set s->err), but we die anyway */
|
| 1490 |
|
| 1491 |
fd = socket(AF_UNIX, SOCK_STREAM, 0);
|
| 1492 |
if (fd < 0) |
| 1493 |
return -1; |
| 1494 |
|
| 1495 |
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) |
| 1496 |
return -1; |
| 1497 |
|
| 1498 |
/* Path length checked in test_old_bird() */
|
| 1499 |
sa.sun_family = AF_UNIX; |
| 1500 |
strcpy(sa.sun_path, name); |
| 1501 |
|
| 1502 |
if (bind(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) < 0) |
| 1503 |
return -1; |
| 1504 |
|
| 1505 |
if (listen(fd, 8) < 0) |
| 1506 |
return -1; |
| 1507 |
|
| 1508 |
s->fd = fd; |
| 1509 |
sk_insert(s); |
| 1510 |
return 0; |
| 1511 |
} |
| 1512 |
|
| 1513 |
|
| 1514 |
#define CMSG_RX_SPACE MAX(CMSG4_SPACE_PKTINFO+CMSG4_SPACE_TTL, \
|
| 1515 |
CMSG6_SPACE_PKTINFO+CMSG6_SPACE_TTL) |
| 1516 |
#define CMSG_TX_SPACE MAX(CMSG4_SPACE_PKTINFO,CMSG6_SPACE_PKTINFO)
|
| 1517 |
|
| 1518 |
static void |
| 1519 |
sk_prepare_cmsgs(sock *s, struct msghdr *msg, void *cbuf, size_t cbuflen) |
| 1520 |
{
|
| 1521 |
if (sk_is_ipv4(s))
|
| 1522 |
sk_prepare_cmsgs4(s, msg, cbuf, cbuflen); |
| 1523 |
else
|
| 1524 |
sk_prepare_cmsgs6(s, msg, cbuf, cbuflen); |
| 1525 |
} |
| 1526 |
|
| 1527 |
static void |
| 1528 |
sk_process_cmsgs(sock *s, struct msghdr *msg)
|
| 1529 |
{
|
| 1530 |
struct cmsghdr *cm;
|
| 1531 |
|
| 1532 |
s->laddr = IPA_NONE; |
| 1533 |
s->lifindex = 0;
|
| 1534 |
s->rcv_ttl = -1;
|
| 1535 |
|
| 1536 |
for (cm = CMSG_FIRSTHDR(msg); cm != NULL; cm = CMSG_NXTHDR(msg, cm)) |
| 1537 |
{
|
| 1538 |
if ((cm->cmsg_level == SOL_IP) && sk_is_ipv4(s))
|
| 1539 |
{
|
| 1540 |
sk_process_cmsg4_pktinfo(s, cm); |
| 1541 |
sk_process_cmsg4_ttl(s, cm); |
| 1542 |
} |
| 1543 |
|
| 1544 |
if ((cm->cmsg_level == SOL_IPV6) && sk_is_ipv6(s))
|
| 1545 |
{
|
| 1546 |
sk_process_cmsg6_pktinfo(s, cm); |
| 1547 |
sk_process_cmsg6_ttl(s, cm); |
| 1548 |
} |
| 1549 |
} |
| 1550 |
} |
| 1551 |
|
| 1552 |
|
| 1553 |
static inline int |
| 1554 |
sk_sendmsg(sock *s) |
| 1555 |
{
|
| 1556 |
struct iovec iov = {s->tbuf, s->tpos - s->tbuf};
|
| 1557 |
byte cmsg_buf[CMSG_TX_SPACE]; |
| 1558 |
sockaddr dst; |
| 1559 |
int flags = 0; |
| 1560 |
|
| 1561 |
sockaddr_fill(&dst, s->af, s->daddr, s->iface, s->dport); |
| 1562 |
|
| 1563 |
struct msghdr msg = {
|
| 1564 |
.msg_name = &dst.sa, |
| 1565 |
.msg_namelen = SA_LEN(dst), |
| 1566 |
.msg_iov = &iov, |
| 1567 |
.msg_iovlen = 1
|
| 1568 |
}; |
| 1569 |
|
| 1570 |
#ifdef CONFIG_DONTROUTE_UNICAST
|
| 1571 |
/* FreeBSD silently changes TTL to 1 when MSG_DONTROUTE is used, therefore we
|
| 1572 |
cannot use it for other cases (e.g. when TTL security is used). */
|
| 1573 |
if (ipa_is_ip4(s->daddr) && ip4_is_unicast(ipa_to_ip4(s->daddr)) && (s->ttl == 1)) |
| 1574 |
flags = MSG_DONTROUTE; |
| 1575 |
#endif
|
| 1576 |
|
| 1577 |
#ifdef CONFIG_USE_HDRINCL
|
| 1578 |
byte hdr[20];
|
| 1579 |
struct iovec iov2[2] = { {hdr, 20}, iov }; |
| 1580 |
|
| 1581 |
if (s->flags & SKF_HDRINCL)
|
| 1582 |
{
|
| 1583 |
sk_prepare_ip_header(s, hdr, iov.iov_len); |
| 1584 |
msg.msg_iov = iov2; |
| 1585 |
msg.msg_iovlen = 2;
|
| 1586 |
} |
| 1587 |
#endif
|
| 1588 |
|
| 1589 |
if (s->flags & SKF_PKTINFO)
|
| 1590 |
sk_prepare_cmsgs(s, &msg, cmsg_buf, sizeof(cmsg_buf));
|
| 1591 |
|
| 1592 |
return sendmsg(s->fd, &msg, flags);
|
| 1593 |
} |
| 1594 |
|
| 1595 |
static inline int |
| 1596 |
sk_recvmsg(sock *s) |
| 1597 |
{
|
| 1598 |
struct iovec iov = {s->rbuf, s->rbsize};
|
| 1599 |
byte cmsg_buf[CMSG_RX_SPACE]; |
| 1600 |
sockaddr src; |
| 1601 |
|
| 1602 |
struct msghdr msg = {
|
| 1603 |
.msg_name = &src.sa, |
| 1604 |
.msg_namelen = sizeof(src), // XXXX ?? |
| 1605 |
.msg_iov = &iov, |
| 1606 |
.msg_iovlen = 1,
|
| 1607 |
.msg_control = cmsg_buf, |
| 1608 |
.msg_controllen = sizeof(cmsg_buf),
|
| 1609 |
.msg_flags = 0
|
| 1610 |
}; |
| 1611 |
|
| 1612 |
int rv = recvmsg(s->fd, &msg, 0); |
| 1613 |
if (rv < 0) |
| 1614 |
return rv;
|
| 1615 |
|
| 1616 |
//ifdef IPV4
|
| 1617 |
// if (cf_type == SK_IP)
|
| 1618 |
// rv = ipv4_skip_header(pbuf, rv);
|
| 1619 |
//endif
|
| 1620 |
|
| 1621 |
sockaddr_read(&src, s->af, &s->faddr, NULL, &s->fport);
|
| 1622 |
sk_process_cmsgs(s, &msg); |
| 1623 |
|
| 1624 |
if (msg.msg_flags & MSG_TRUNC)
|
| 1625 |
s->flags |= SKF_TRUNCATED; |
| 1626 |
else
|
| 1627 |
s->flags &= ~SKF_TRUNCATED; |
| 1628 |
|
| 1629 |
return rv;
|
| 1630 |
} |
| 1631 |
|
| 1632 |
|
| 1633 |
static inline void reset_tx_buffer(sock *s) { s->ttx = s->tpos = s->tbuf; } |
| 1634 |
|
| 1635 |
static int |
| 1636 |
sk_maybe_write(sock *s) |
| 1637 |
{
|
| 1638 |
int e;
|
| 1639 |
|
| 1640 |
switch (s->type)
|
| 1641 |
{
|
| 1642 |
case SK_TCP:
|
| 1643 |
case SK_MAGIC:
|
| 1644 |
case SK_UNIX:
|
| 1645 |
while (s->ttx != s->tpos)
|
| 1646 |
{
|
| 1647 |
e = write(s->fd, s->ttx, s->tpos - s->ttx); |
| 1648 |
|
| 1649 |
if (e < 0) |
| 1650 |
{
|
| 1651 |
if (errno != EINTR && errno != EAGAIN)
|
| 1652 |
{
|
| 1653 |
reset_tx_buffer(s); |
| 1654 |
/* EPIPE is just a connection close notification during TX */
|
| 1655 |
s->err_hook(s, (errno != EPIPE) ? errno : 0);
|
| 1656 |
return -1; |
| 1657 |
} |
| 1658 |
return 0; |
| 1659 |
} |
| 1660 |
s->ttx += e; |
| 1661 |
} |
| 1662 |
reset_tx_buffer(s); |
| 1663 |
return 1; |
| 1664 |
|
| 1665 |
#ifdef HAVE_LIBSSH
|
| 1666 |
case SK_SSH:
|
| 1667 |
while (s->ttx != s->tpos)
|
| 1668 |
{
|
| 1669 |
e = ssh_channel_write(s->ssh->channel, s->ttx, s->tpos - s->ttx); |
| 1670 |
|
| 1671 |
if (e < 0) |
| 1672 |
{
|
| 1673 |
s->err = ssh_get_error(s->ssh->session); |
| 1674 |
s->err_hook(s, ssh_get_error_code(s->ssh->session)); |
| 1675 |
|
| 1676 |
reset_tx_buffer(s); |
| 1677 |
/* EPIPE is just a connection close notification during TX */
|
| 1678 |
s->err_hook(s, (errno != EPIPE) ? errno : 0);
|
| 1679 |
return -1; |
| 1680 |
} |
| 1681 |
s->ttx += e; |
| 1682 |
} |
| 1683 |
reset_tx_buffer(s); |
| 1684 |
return 1; |
| 1685 |
#endif
|
| 1686 |
|
| 1687 |
case SK_UDP:
|
| 1688 |
case SK_IP:
|
| 1689 |
{
|
| 1690 |
if (s->tbuf == s->tpos)
|
| 1691 |
return 1; |
| 1692 |
|
| 1693 |
e = sk_sendmsg(s); |
| 1694 |
|
| 1695 |
if (e < 0) |
| 1696 |
{
|
| 1697 |
if (errno != EINTR && errno != EAGAIN)
|
| 1698 |
{
|
| 1699 |
reset_tx_buffer(s); |
| 1700 |
s->err_hook(s, errno); |
| 1701 |
return -1; |
| 1702 |
} |
| 1703 |
|
| 1704 |
if (!s->tx_hook)
|
| 1705 |
reset_tx_buffer(s); |
| 1706 |
return 0; |
| 1707 |
} |
| 1708 |
reset_tx_buffer(s); |
| 1709 |
return 1; |
| 1710 |
} |
| 1711 |
|
| 1712 |
default:
|
| 1713 |
bug("sk_maybe_write: unknown socket type %d", s->type);
|
| 1714 |
} |
| 1715 |
} |
| 1716 |
|
| 1717 |
int
|
| 1718 |
sk_rx_ready(sock *s) |
| 1719 |
{
|
| 1720 |
int rv;
|
| 1721 |
struct pollfd pfd = { .fd = s->fd };
|
| 1722 |
pfd.events |= POLLIN; |
| 1723 |
|
| 1724 |
redo:
|
| 1725 |
rv = poll(&pfd, 1, 0); |
| 1726 |
|
| 1727 |
if ((rv < 0) && (errno == EINTR || errno == EAGAIN)) |
| 1728 |
goto redo;
|
| 1729 |
|
| 1730 |
return rv;
|
| 1731 |
} |
| 1732 |
|
| 1733 |
/**
|
| 1734 |
* sk_send - send data to a socket
|
| 1735 |
* @s: socket
|
| 1736 |
* @len: number of bytes to send
|
| 1737 |
*
|
| 1738 |
* This function sends @len bytes of data prepared in the
|
| 1739 |
* transmit buffer of the socket @s to the network connection.
|
| 1740 |
* If the packet can be sent immediately, it does so and returns
|
| 1741 |
* 1, else it queues the packet for later processing, returns 0
|
| 1742 |
* and calls the @tx_hook of the socket when the tranmission
|
| 1743 |
* takes place.
|
| 1744 |
*/
|
| 1745 |
int
|
| 1746 |
sk_send(sock *s, unsigned len)
|
| 1747 |
{
|
| 1748 |
s->ttx = s->tbuf; |
| 1749 |
s->tpos = s->tbuf + len; |
| 1750 |
return sk_maybe_write(s);
|
| 1751 |
} |
| 1752 |
|
| 1753 |
/**
|
| 1754 |
* sk_send_to - send data to a specific destination
|
| 1755 |
* @s: socket
|
| 1756 |
* @len: number of bytes to send
|
| 1757 |
* @addr: IP address to send the packet to
|
| 1758 |
* @port: port to send the packet to
|
| 1759 |
*
|
| 1760 |
* This is a sk_send() replacement for connection-less packet sockets
|
| 1761 |
* which allows destination of the packet to be chosen dynamically.
|
| 1762 |
* Raw IP sockets should use 0 for @port.
|
| 1763 |
*/
|
| 1764 |
int
|
| 1765 |
sk_send_to(sock *s, unsigned len, ip_addr addr, unsigned port) |
| 1766 |
{
|
| 1767 |
s->daddr = addr; |
| 1768 |
if (port)
|
| 1769 |
s->dport = port; |
| 1770 |
|
| 1771 |
s->ttx = s->tbuf; |
| 1772 |
s->tpos = s->tbuf + len; |
| 1773 |
return sk_maybe_write(s);
|
| 1774 |
} |
| 1775 |
|
| 1776 |
/*
|
| 1777 |
int
|
| 1778 |
sk_send_full(sock *s, unsigned len, struct iface *ifa,
|
| 1779 |
ip_addr saddr, ip_addr daddr, unsigned dport)
|
| 1780 |
{
|
| 1781 |
s->iface = ifa;
|
| 1782 |
s->saddr = saddr;
|
| 1783 |
s->daddr = daddr;
|
| 1784 |
s->dport = dport;
|
| 1785 |
s->ttx = s->tbuf;
|
| 1786 |
s->tpos = s->tbuf + len;
|
| 1787 |
return sk_maybe_write(s);
|
| 1788 |
}
|
| 1789 |
*/
|
| 1790 |
|
| 1791 |
static void |
| 1792 |
call_rx_hook(sock *s, int size)
|
| 1793 |
{
|
| 1794 |
if (s->rx_hook(s, size))
|
| 1795 |
{
|
| 1796 |
/* We need to be careful since the socket could have been deleted by the hook */
|
| 1797 |
if (current_sock == s)
|
| 1798 |
s->rpos = s->rbuf; |
| 1799 |
} |
| 1800 |
} |
| 1801 |
|
| 1802 |
#ifdef HAVE_LIBSSH
|
| 1803 |
static int |
| 1804 |
sk_read_ssh(sock *s) |
| 1805 |
{
|
| 1806 |
ssh_channel rchans[2] = { s->ssh->channel, NULL }; |
| 1807 |
struct timeval timev = { 1, 0 }; |
| 1808 |
|
| 1809 |
if (ssh_channel_select(rchans, NULL, NULL, &timev) == SSH_EINTR) |
| 1810 |
return 1; /* Try again */ |
| 1811 |
|
| 1812 |
if (ssh_channel_is_eof(s->ssh->channel) != 0) |
| 1813 |
{
|
| 1814 |
/* The remote side is closing the connection */
|
| 1815 |
s->err_hook(s, 0);
|
| 1816 |
return 0; |
| 1817 |
} |
| 1818 |
|
| 1819 |
if (rchans[0] == NULL) |
| 1820 |
return 0; /* No data is available on the socket */ |
| 1821 |
|
| 1822 |
const uint used_bytes = s->rpos - s->rbuf;
|
| 1823 |
const int read_bytes = ssh_channel_read_nonblocking(s->ssh->channel, s->rpos, s->rbsize - used_bytes, 0); |
| 1824 |
if (read_bytes > 0) |
| 1825 |
{
|
| 1826 |
/* Received data */
|
| 1827 |
s->rpos += read_bytes; |
| 1828 |
call_rx_hook(s, used_bytes + read_bytes); |
| 1829 |
return 1; |
| 1830 |
} |
| 1831 |
else if (read_bytes == 0) |
| 1832 |
{
|
| 1833 |
if (ssh_channel_is_eof(s->ssh->channel) != 0) |
| 1834 |
{
|
| 1835 |
/* The remote side is closing the connection */
|
| 1836 |
s->err_hook(s, 0);
|
| 1837 |
} |
| 1838 |
} |
| 1839 |
else
|
| 1840 |
{
|
| 1841 |
s->err = ssh_get_error(s->ssh->session); |
| 1842 |
s->err_hook(s, ssh_get_error_code(s->ssh->session)); |
| 1843 |
} |
| 1844 |
|
| 1845 |
return 0; /* No data is available on the socket */ |
| 1846 |
} |
| 1847 |
#endif
|
| 1848 |
|
| 1849 |
/* sk_read() and sk_write() are called from BFD's event loop */
|
| 1850 |
|
| 1851 |
int
|
| 1852 |
sk_read(sock *s, int revents)
|
| 1853 |
{
|
| 1854 |
switch (s->type)
|
| 1855 |
{
|
| 1856 |
case SK_TCP_PASSIVE:
|
| 1857 |
return sk_passive_connected(s, SK_TCP);
|
| 1858 |
|
| 1859 |
case SK_UNIX_PASSIVE:
|
| 1860 |
return sk_passive_connected(s, SK_UNIX);
|
| 1861 |
|
| 1862 |
case SK_TCP:
|
| 1863 |
case SK_UNIX:
|
| 1864 |
{
|
| 1865 |
int c = read(s->fd, s->rpos, s->rbuf + s->rbsize - s->rpos);
|
| 1866 |
|
| 1867 |
if (c < 0) |
| 1868 |
{
|
| 1869 |
if (errno != EINTR && errno != EAGAIN)
|
| 1870 |
s->err_hook(s, errno); |
| 1871 |
else if (errno == EAGAIN && !(revents & POLLIN)) |
| 1872 |
{
|
| 1873 |
log(L_ERR "Got EAGAIN from read when revents=%x (without POLLIN)", revents);
|
| 1874 |
s->err_hook(s, 0);
|
| 1875 |
} |
| 1876 |
} |
| 1877 |
else if (!c) |
| 1878 |
s->err_hook(s, 0);
|
| 1879 |
else
|
| 1880 |
{
|
| 1881 |
s->rpos += c; |
| 1882 |
call_rx_hook(s, s->rpos - s->rbuf); |
| 1883 |
return 1; |
| 1884 |
} |
| 1885 |
return 0; |
| 1886 |
} |
| 1887 |
|
| 1888 |
#ifdef HAVE_LIBSSH
|
| 1889 |
case SK_SSH:
|
| 1890 |
return sk_read_ssh(s);
|
| 1891 |
#endif
|
| 1892 |
|
| 1893 |
case SK_MAGIC:
|
| 1894 |
return s->rx_hook(s, 0); |
| 1895 |
|
| 1896 |
default:
|
| 1897 |
{
|
| 1898 |
int e = sk_recvmsg(s);
|
| 1899 |
|
| 1900 |
if (e < 0) |
| 1901 |
{
|
| 1902 |
if (errno != EINTR && errno != EAGAIN)
|
| 1903 |
s->err_hook(s, errno); |
| 1904 |
return 0; |
| 1905 |
} |
| 1906 |
|
| 1907 |
s->rpos = s->rbuf + e; |
| 1908 |
s->rx_hook(s, e); |
| 1909 |
return 1; |
| 1910 |
} |
| 1911 |
} |
| 1912 |
} |
| 1913 |
|
| 1914 |
int
|
| 1915 |
sk_write(sock *s) |
| 1916 |
{
|
| 1917 |
switch (s->type)
|
| 1918 |
{
|
| 1919 |
case SK_TCP_ACTIVE:
|
| 1920 |
{
|
| 1921 |
sockaddr sa; |
| 1922 |
sockaddr_fill(&sa, s->af, s->daddr, s->iface, s->dport); |
| 1923 |
|
| 1924 |
if (connect(s->fd, &sa.sa, SA_LEN(sa)) >= 0 || errno == EISCONN) |
| 1925 |
sk_tcp_connected(s); |
| 1926 |
else if (errno != EINTR && errno != EAGAIN && errno != EINPROGRESS) |
| 1927 |
s->err_hook(s, errno); |
| 1928 |
return 0; |
| 1929 |
} |
| 1930 |
|
| 1931 |
#ifdef HAVE_LIBSSH
|
| 1932 |
case SK_SSH_ACTIVE:
|
| 1933 |
{
|
| 1934 |
switch (sk_ssh_connect(s))
|
| 1935 |
{
|
| 1936 |
case SSH_OK:
|
| 1937 |
sk_ssh_connected(s); |
| 1938 |
break;
|
| 1939 |
|
| 1940 |
case SSH_AGAIN:
|
| 1941 |
return 1; |
| 1942 |
|
| 1943 |
case SSH_ERROR:
|
| 1944 |
s->err = ssh_get_error(s->ssh->session); |
| 1945 |
s->err_hook(s, ssh_get_error_code(s->ssh->session)); |
| 1946 |
break;
|
| 1947 |
} |
| 1948 |
return 0; |
| 1949 |
} |
| 1950 |
#endif
|
| 1951 |
|
| 1952 |
default:
|
| 1953 |
if (s->ttx != s->tpos && sk_maybe_write(s) > 0) |
| 1954 |
{
|
| 1955 |
if (s->tx_hook)
|
| 1956 |
s->tx_hook(s); |
| 1957 |
return 1; |
| 1958 |
} |
| 1959 |
return 0; |
| 1960 |
} |
| 1961 |
} |
| 1962 |
|
| 1963 |
int sk_is_ipv4(sock *s)
|
| 1964 |
{ return s->af == AF_INET; }
|
| 1965 |
|
| 1966 |
int sk_is_ipv6(sock *s)
|
| 1967 |
{ return s->af == AF_INET6; }
|
| 1968 |
|
| 1969 |
void
|
| 1970 |
sk_err(sock *s, int revents)
|
| 1971 |
{
|
| 1972 |
int se = 0, sse = sizeof(se); |
| 1973 |
if ((s->type != SK_MAGIC) && (revents & POLLERR))
|
| 1974 |
if (getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &se, &sse) < 0) |
| 1975 |
{
|
| 1976 |
log(L_ERR "IO: Socket error: SO_ERROR: %m");
|
| 1977 |
se = 0;
|
| 1978 |
} |
| 1979 |
|
| 1980 |
s->err_hook(s, se); |
| 1981 |
} |
| 1982 |
|
| 1983 |
void
|
| 1984 |
sk_dump_all(void)
|
| 1985 |
{
|
| 1986 |
node *n; |
| 1987 |
sock *s; |
| 1988 |
|
| 1989 |
debug("Open sockets:\n");
|
| 1990 |
WALK_LIST(n, sock_list) |
| 1991 |
{
|
| 1992 |
s = SKIP_BACK(sock, n, n); |
| 1993 |
debug("%p ", s);
|
| 1994 |
sk_dump(&s->r); |
| 1995 |
} |
| 1996 |
debug("\n");
|
| 1997 |
} |
| 1998 |
|
| 1999 |
|
| 2000 |
/*
|
| 2001 |
* Internal event log and watchdog
|
| 2002 |
*/
|
| 2003 |
|
| 2004 |
#define EVENT_LOG_LENGTH 32 |
| 2005 |
|
| 2006 |
struct event_log_entry
|
| 2007 |
{
|
| 2008 |
void *hook;
|
| 2009 |
void *data;
|
| 2010 |
btime timestamp; |
| 2011 |
btime duration; |
| 2012 |
}; |
| 2013 |
|
| 2014 |
static struct event_log_entry event_log[EVENT_LOG_LENGTH]; |
| 2015 |
static struct event_log_entry *event_open; |
| 2016 |
static int event_log_pos, event_log_num, watchdog_active; |
| 2017 |
static btime last_time;
|
| 2018 |
static btime loop_time;
|
| 2019 |
|
| 2020 |
static void |
| 2021 |
io_update_time(void)
|
| 2022 |
{
|
| 2023 |
struct timespec ts;
|
| 2024 |
int rv;
|
| 2025 |
|
| 2026 |
/*
|
| 2027 |
* This is third time-tracking procedure (after update_times() above and
|
| 2028 |
* times_update() in BFD), dedicated to internal event log and latency
|
| 2029 |
* tracking. Hopefully, we consolidate these sometimes.
|
| 2030 |
*/
|
| 2031 |
|
| 2032 |
rv = clock_gettime(CLOCK_MONOTONIC, &ts); |
| 2033 |
if (rv < 0) |
| 2034 |
die("clock_gettime: %m");
|
| 2035 |
|
| 2036 |
last_time = ts.tv_sec S + ts.tv_nsec NS; |
| 2037 |
|
| 2038 |
if (event_open)
|
| 2039 |
{
|
| 2040 |
event_open->duration = last_time - event_open->timestamp; |
| 2041 |
|
| 2042 |
if (event_open->duration > config->latency_limit)
|
| 2043 |
log(L_WARN "Event 0x%p 0x%p took %d ms",
|
| 2044 |
event_open->hook, event_open->data, (int) (event_open->duration TO_MS));
|
| 2045 |
|
| 2046 |
event_open = NULL;
|
| 2047 |
} |
| 2048 |
} |
| 2049 |
|
| 2050 |
/**
|
| 2051 |
* io_log_event - mark approaching event into event log
|
| 2052 |
* @hook: event hook address
|
| 2053 |
* @data: event data address
|
| 2054 |
*
|
| 2055 |
* Store info (hook, data, timestamp) about the following internal event into
|
| 2056 |
* a circular event log (@event_log). When latency tracking is enabled, the log
|
| 2057 |
* entry is kept open (in @event_open) so the duration can be filled later.
|
| 2058 |
*/
|
| 2059 |
void
|
| 2060 |
io_log_event(void *hook, void *data) |
| 2061 |
{
|
| 2062 |
if (config->latency_debug)
|
| 2063 |
io_update_time(); |
| 2064 |
|
| 2065 |
struct event_log_entry *en = event_log + event_log_pos;
|
| 2066 |
|
| 2067 |
en->hook = hook; |
| 2068 |
en->data = data; |
| 2069 |
en->timestamp = last_time; |
| 2070 |
en->duration = 0;
|
| 2071 |
|
| 2072 |
event_log_num++; |
| 2073 |
event_log_pos++; |
| 2074 |
event_log_pos %= EVENT_LOG_LENGTH; |
| 2075 |
|
| 2076 |
event_open = config->latency_debug ? en : NULL;
|
| 2077 |
} |
| 2078 |
|
| 2079 |
static inline void |
| 2080 |
io_close_event(void)
|
| 2081 |
{
|
| 2082 |
if (event_open)
|
| 2083 |
io_update_time(); |
| 2084 |
} |
| 2085 |
|
| 2086 |
void
|
| 2087 |
io_log_dump(void)
|
| 2088 |
{
|
| 2089 |
int i;
|
| 2090 |
|
| 2091 |
log(L_DEBUG "Event log:");
|
| 2092 |
for (i = 0; i < EVENT_LOG_LENGTH; i++) |
| 2093 |
{
|
| 2094 |
struct event_log_entry *en = event_log + (event_log_pos + i) % EVENT_LOG_LENGTH;
|
| 2095 |
if (en->hook)
|
| 2096 |
log(L_DEBUG " Event 0x%p 0x%p at %8d for %d ms", en->hook, en->data,
|
| 2097 |
(int) ((last_time - en->timestamp) TO_MS), (int) (en->duration TO_MS)); |
| 2098 |
} |
| 2099 |
} |
| 2100 |
|
| 2101 |
void
|
| 2102 |
watchdog_sigalrm(int sig UNUSED)
|
| 2103 |
{
|
| 2104 |
/* Update last_time and duration, but skip latency check */
|
| 2105 |
config->latency_limit = 0xffffffff;
|
| 2106 |
io_update_time(); |
| 2107 |
|
| 2108 |
/* We want core dump */
|
| 2109 |
abort(); |
| 2110 |
} |
| 2111 |
|
| 2112 |
static inline void |
| 2113 |
watchdog_start1(void)
|
| 2114 |
{
|
| 2115 |
io_update_time(); |
| 2116 |
|
| 2117 |
loop_time = last_time; |
| 2118 |
} |
| 2119 |
|
| 2120 |
static inline void |
| 2121 |
watchdog_start(void)
|
| 2122 |
{
|
| 2123 |
io_update_time(); |
| 2124 |
|
| 2125 |
loop_time = last_time; |
| 2126 |
event_log_num = 0;
|
| 2127 |
|
| 2128 |
if (config->watchdog_timeout)
|
| 2129 |
{
|
| 2130 |
alarm(config->watchdog_timeout); |
| 2131 |
watchdog_active = 1;
|
| 2132 |
} |
| 2133 |
} |
| 2134 |
|
| 2135 |
static inline void |
| 2136 |
watchdog_stop(void)
|
| 2137 |
{
|
| 2138 |
io_update_time(); |
| 2139 |
|
| 2140 |
if (watchdog_active)
|
| 2141 |
{
|
| 2142 |
alarm(0);
|
| 2143 |
watchdog_active = 0;
|
| 2144 |
} |
| 2145 |
|
| 2146 |
btime duration = last_time - loop_time; |
| 2147 |
if (duration > config->watchdog_warning)
|
| 2148 |
log(L_WARN "I/O loop cycle took %d ms for %d events",
|
| 2149 |
(int) (duration TO_MS), event_log_num);
|
| 2150 |
} |
| 2151 |
|
| 2152 |
|
| 2153 |
/*
|
| 2154 |
* Main I/O Loop
|
| 2155 |
*/
|
| 2156 |
|
| 2157 |
volatile int async_config_flag; /* Asynchronous reconfiguration/dump scheduled */ |
| 2158 |
volatile int async_dump_flag; |
| 2159 |
volatile int async_shutdown_flag; |
| 2160 |
|
| 2161 |
void
|
| 2162 |
io_init(void)
|
| 2163 |
{
|
| 2164 |
init_list(&sock_list); |
| 2165 |
init_list(&global_event_list); |
| 2166 |
krt_io_init(); |
| 2167 |
// XXX init_times();
|
| 2168 |
// XXX update_times();
|
| 2169 |
boot_time = current_time(); |
| 2170 |
|
| 2171 |
u64 now = (u64) current_real_time(); |
| 2172 |
srandom((uint) (now ^ (now >> 32)));
|
| 2173 |
} |
| 2174 |
|
| 2175 |
static int short_loops = 0; |
| 2176 |
#define SHORT_LOOP_MAX 10 |
| 2177 |
|
| 2178 |
void
|
| 2179 |
io_loop(void)
|
| 2180 |
{
|
| 2181 |
int poll_tout, timeout;
|
| 2182 |
int nfds, events, pout;
|
| 2183 |
timer *t; |
| 2184 |
sock *s; |
| 2185 |
node *n; |
| 2186 |
int fdmax = 256; |
| 2187 |
struct pollfd *pfd = xmalloc(fdmax * sizeof(struct pollfd)); |
| 2188 |
|
| 2189 |
watchdog_start1(); |
| 2190 |
for(;;)
|
| 2191 |
{
|
| 2192 |
times_update(&main_timeloop); |
| 2193 |
events = ev_run_list(&global_event_list); |
| 2194 |
timers_fire(&main_timeloop); |
| 2195 |
io_close_event(); |
| 2196 |
|
| 2197 |
// FIXME
|
| 2198 |
poll_tout = (events ? 0 : 3000); /* Time in milliseconds */ |
| 2199 |
if (t = timers_first(&main_timeloop))
|
| 2200 |
{
|
| 2201 |
times_update(&main_timeloop); |
| 2202 |
timeout = (tm_remains(t) TO_MS) + 1;
|
| 2203 |
poll_tout = MIN(poll_tout, timeout); |
| 2204 |
} |
| 2205 |
|
| 2206 |
nfds = 0;
|
| 2207 |
WALK_LIST(n, sock_list) |
| 2208 |
{
|
| 2209 |
pfd[nfds] = (struct pollfd) { .fd = -1 }; /* everything other set to 0 by this */ |
| 2210 |
s = SKIP_BACK(sock, n, n); |
| 2211 |
if (s->rx_hook)
|
| 2212 |
{
|
| 2213 |
pfd[nfds].fd = s->fd; |
| 2214 |
pfd[nfds].events |= POLLIN; |
| 2215 |
} |
| 2216 |
if (s->tx_hook && s->ttx != s->tpos)
|
| 2217 |
{
|
| 2218 |
pfd[nfds].fd = s->fd; |
| 2219 |
pfd[nfds].events |= POLLOUT; |
| 2220 |
} |
| 2221 |
if (pfd[nfds].fd != -1) |
| 2222 |
{
|
| 2223 |
s->index = nfds; |
| 2224 |
nfds++; |
| 2225 |
} |
| 2226 |
else
|
| 2227 |
s->index = -1;
|
| 2228 |
|
| 2229 |
if (nfds >= fdmax)
|
| 2230 |
{
|
| 2231 |
fdmax *= 2;
|
| 2232 |
pfd = xrealloc(pfd, fdmax * sizeof(struct pollfd)); |
| 2233 |
} |
| 2234 |
} |
| 2235 |
|
| 2236 |
/*
|
| 2237 |
* Yes, this is racy. But even if the signal comes before this test
|
| 2238 |
* and entering poll(), it gets caught on the next timer tick.
|
| 2239 |
*/
|
| 2240 |
|
| 2241 |
if (async_config_flag)
|
| 2242 |
{
|
| 2243 |
io_log_event(async_config, NULL);
|
| 2244 |
async_config(); |
| 2245 |
async_config_flag = 0;
|
| 2246 |
continue;
|
| 2247 |
} |
| 2248 |
if (async_dump_flag)
|
| 2249 |
{
|
| 2250 |
io_log_event(async_dump, NULL);
|
| 2251 |
async_dump(); |
| 2252 |
async_dump_flag = 0;
|
| 2253 |
continue;
|
| 2254 |
} |
| 2255 |
if (async_shutdown_flag)
|
| 2256 |
{
|
| 2257 |
io_log_event(async_shutdown, NULL);
|
| 2258 |
async_shutdown(); |
| 2259 |
async_shutdown_flag = 0;
|
| 2260 |
continue;
|
| 2261 |
} |
| 2262 |
|
| 2263 |
/* And finally enter poll() to find active sockets */
|
| 2264 |
watchdog_stop(); |
| 2265 |
pout = poll(pfd, nfds, poll_tout); |
| 2266 |
watchdog_start(); |
| 2267 |
|
| 2268 |
if (pout < 0) |
| 2269 |
{
|
| 2270 |
if (errno == EINTR || errno == EAGAIN)
|
| 2271 |
continue;
|
| 2272 |
die("poll: %m");
|
| 2273 |
} |
| 2274 |
if (pout)
|
| 2275 |
{
|
| 2276 |
times_update(&main_timeloop); |
| 2277 |
|
| 2278 |
/* guaranteed to be non-empty */
|
| 2279 |
current_sock = SKIP_BACK(sock, n, HEAD(sock_list)); |
| 2280 |
|
| 2281 |
while (current_sock)
|
| 2282 |
{
|
| 2283 |
sock *s = current_sock; |
| 2284 |
if (s->index == -1) |
| 2285 |
{
|
| 2286 |
current_sock = sk_next(s); |
| 2287 |
goto next;
|
| 2288 |
} |
| 2289 |
|
| 2290 |
int e;
|
| 2291 |
int steps;
|
| 2292 |
|
| 2293 |
steps = MAX_STEPS; |
| 2294 |
if (s->fast_rx && (pfd[s->index].revents & POLLIN) && s->rx_hook)
|
| 2295 |
do
|
| 2296 |
{
|
| 2297 |
steps--; |
| 2298 |
io_log_event(s->rx_hook, s->data); |
| 2299 |
e = sk_read(s, pfd[s->index].revents); |
| 2300 |
if (s != current_sock)
|
| 2301 |
goto next;
|
| 2302 |
} |
| 2303 |
while (e && s->rx_hook && steps);
|
| 2304 |
|
| 2305 |
steps = MAX_STEPS; |
| 2306 |
if (pfd[s->index].revents & POLLOUT)
|
| 2307 |
do
|
| 2308 |
{
|
| 2309 |
steps--; |
| 2310 |
io_log_event(s->tx_hook, s->data); |
| 2311 |
e = sk_write(s); |
| 2312 |
if (s != current_sock)
|
| 2313 |
goto next;
|
| 2314 |
} |
| 2315 |
while (e && steps);
|
| 2316 |
|
| 2317 |
current_sock = sk_next(s); |
| 2318 |
next: ;
|
| 2319 |
} |
| 2320 |
|
| 2321 |
short_loops++; |
| 2322 |
if (events && (short_loops < SHORT_LOOP_MAX))
|
| 2323 |
continue;
|
| 2324 |
short_loops = 0;
|
| 2325 |
|
| 2326 |
int count = 0; |
| 2327 |
current_sock = stored_sock; |
| 2328 |
if (current_sock == NULL) |
| 2329 |
current_sock = SKIP_BACK(sock, n, HEAD(sock_list)); |
| 2330 |
|
| 2331 |
while (current_sock && count < MAX_RX_STEPS)
|
| 2332 |
{
|
| 2333 |
sock *s = current_sock; |
| 2334 |
if (s->index == -1) |
| 2335 |
{
|
| 2336 |
current_sock = sk_next(s); |
| 2337 |
goto next2;
|
| 2338 |
} |
| 2339 |
|
| 2340 |
if (!s->fast_rx && (pfd[s->index].revents & POLLIN) && s->rx_hook)
|
| 2341 |
{
|
| 2342 |
count++; |
| 2343 |
io_log_event(s->rx_hook, s->data); |
| 2344 |
sk_read(s, pfd[s->index].revents); |
| 2345 |
if (s != current_sock)
|
| 2346 |
goto next2;
|
| 2347 |
} |
| 2348 |
|
| 2349 |
if (pfd[s->index].revents & (POLLHUP | POLLERR))
|
| 2350 |
{
|
| 2351 |
sk_err(s, pfd[s->index].revents); |
| 2352 |
if (s != current_sock)
|
| 2353 |
goto next2;
|
| 2354 |
} |
| 2355 |
|
| 2356 |
current_sock = sk_next(s); |
| 2357 |
next2: ;
|
| 2358 |
} |
| 2359 |
|
| 2360 |
|
| 2361 |
stored_sock = current_sock; |
| 2362 |
} |
| 2363 |
} |
| 2364 |
} |
| 2365 |
|
| 2366 |
void
|
| 2367 |
test_old_bird(char *path)
|
| 2368 |
{
|
| 2369 |
int fd;
|
| 2370 |
struct sockaddr_un sa;
|
| 2371 |
|
| 2372 |
fd = socket(AF_UNIX, SOCK_STREAM, 0);
|
| 2373 |
if (fd < 0) |
| 2374 |
die("Cannot create socket: %m");
|
| 2375 |
if (strlen(path) >= sizeof(sa.sun_path)) |
| 2376 |
die("Socket path too long");
|
| 2377 |
bzero(&sa, sizeof(sa));
|
| 2378 |
sa.sun_family = AF_UNIX; |
| 2379 |
strcpy(sa.sun_path, path); |
| 2380 |
if (connect(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == 0) |
| 2381 |
die("I found another BIRD running.");
|
| 2382 |
close(fd); |
| 2383 |
} |