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conntest.c
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conntest.c
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/*
conntest.c
Copyright (c) 1999 - 2013 Pekka Riikonen, [email protected].
This program 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.
This program 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#ifdef WIN32
#define SYSLOG(x)
#define strcasecmp strcmp
#define snprintf _snprintf
#define usleep(x) (Sleep(x / 1000))
#define sleep(x) (Sleep(x * 1000))
#include <winsock2.h>
#include <windows.h>
#else
#define SYSLOG(x) syslog x
#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 201112L
#endif
#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <fcntl.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <netdb.h>
#include <net/if.h>
#include <netinet/tcp.h>
#include <syslog.h>
#include <sys/epoll.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <signal.h>
#endif
#include "conntest.h"
#include "ike.h"
/* Ethernet header len */
#define ETHLEN 14
/* IPv4 header len */
#define IP4LEN 20
/* IPv6 header len */
#define IP6LEN 40
/* Data rate units */
#define KBIT 1000
#define KBIT_S "Kbit"
#define KIBIT 1024
#define KIBIT_S "Kib"
#define MBIT 1000000
#define MBIT_S "Mbit"
#define MIBIT 1048576
#define MIBIT_S "Mib"
#define GBIT 1000000000
#define GBIT_S "Gbit"
#define GIBIT 1073741957
#define GIBIT_S "Gib"
char *e_host = NULL;
char *e_ip_start = NULL;
char *e_ip_end = NULL;
char *e_lip = NULL;
char *e_sip = NULL; // Source IP for multicast.
char *e_lip_start = NULL;
char *e_lip_end = NULL;
int e_lip_s = 1;
int e_lip_e = 0;
int e_port = 9;
int e_port_end = 9;
int e_lport = 0;
int e_lport_end = 0;
int e_num_conn;
int e_data_len;
int e_send_loop;
int e_flood, e_data_flood;
int e_show_src;
int e_sleep = 1000;
int e_speed = 0;
int e_speed_unit = 0;
int e_num_pkts = 0;
int e_threads;
int e_proto;
int e_do_ike = 0;
int e_ike_attack = 0;
char *e_ike_identity = NULL;
int e_ike_group = 2;
int e_ike_auth = 1;
char *e_header = NULL;
int e_header_len = 0;
int e_sock_type = PF_INET;
int e_sock_proto = 0;
int e_unique = 0;
int e_random_ip = 0;
int e_random_lport = 0;
unsigned char e_tcp_flags = 0;
unsigned char e_tos = 0;
int e_pmtu = -1;
int e_ttl = -1;
int e_time;
int e_want_ip6 = 0;
int e_force_ip4 = 0;
int e_quiet = 0;
int e_hexdump = 0;
char *e_ifname = NULL;
unsigned long long e_freq = 0;
int e_server = 0;
int e_server_mode = 0;
char *e_htdocs = ".";
char *e_filename = NULL;
FILE *e_output = NULL;
int e_csv = 0;
int e_exit_limit = 0;
unsigned int e_diag = 0;
int e_gstats = 0;
unsigned char read_buf[65536];
#define SERVER_DISCARD 1
#define SERVER_ECHO 2
#define SERVER_HTTP 3
static unsigned char ip4_header[20] = "\x45\x00\x00\x00\x00\x00\x00\x00\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
#define MAX_SOCKETS 20000
#define MAX_CONNS 4000
#define CONN_HASH_SIZE 512
#define EXPIRE_UDP 4000
#define CLIENT 0
#define SERVER 1
#define HTTP_HEADER "HTTP/1.1 200 OK\r\nServer: ConnTestHTTP/1.0\r\n"
unsigned long long g_recv_pkts;
unsigned long long g_send_pkts;
double g_recv_bytes;
double g_send_bytes;
unsigned int g_time;
unsigned long long g_p_recv_pkts;
unsigned long long g_p_send_pkts;
double g_p_recv_bytes;
double g_p_send_bytes;
unsigned int g_p_time;
unsigned long long g_conns;
struct socket_conn {
struct socket_conn *next;
struct socket_conn *prev;
int hprint;
unsigned long long recv_pkts;
unsigned long long send_pkts;
double recv_bytes;
double send_bytes;
unsigned int time;
unsigned long long p_recv_pkts;
unsigned long long p_send_pkts;
double p_recv_bytes;
double p_send_bytes;
unsigned int p_time;
unsigned int diag;
c_sockaddr addr;
char *ip;
int port;
unsigned char *buf;
unsigned char *bufp;
size_t buf_off;
size_t buf_len;
unsigned char *page;
size_t page_size;
char *method;
char *uri;
char keepalive;
};
struct socket {
char type;
int sock;
unsigned char iph[20];
union {
unsigned char udp[8];
unsigned char tcp[20];
};
c_sockaddr udp_dest;
c_sockaddr udp_src;
struct socket_conn *conn;
struct socket_conn **conns;
int num_conns;
};
struct sockets {
#ifdef MAX_SOCKETS
struct socket sockets[MAX_SOCKETS];
#else
struct socket *sockets;
#endif /* MAX_SOCKETS */
int num_sockets;
};
#define PUT32(d, n) \
do { \
(d)[0] = (n) >> 24 & 0xff; \
(d)[1] = (n) >> 16 & 0xff; \
(d)[2] = (n) >> 8 & 0xff; \
(d)[3] = (n) & 0xff; \
} while(0)
#define GET32(l, cp) \
do { \
(l) = ((unsigned int)(unsigned char)(cp)[0]) << 24 \
| ((unsigned int)(unsigned char)(cp)[1] << 16) \
| ((unsigned int)(unsigned char)(cp)[2] << 8) \
| ((unsigned int)(unsigned char)(cp)[3]); \
} while(0)
#define PUT16(d, n) \
do { \
(d)[0] = (n) >> 8 & 0xff; \
(d)[1] = (n) & 0xff; \
} while(0)
#define SWAB32(l) ((unsigned int) \
(((unsigned int)(l) & (unsigned int)0x000000FFUL) << 24) | \
(((unsigned int)(l) & (unsigned int)0x0000FF00UL) << 8) | \
(((unsigned int)(l) & (unsigned int)0x00FF0000UL) >> 8) | \
(((unsigned int)(l) & (unsigned int)0xFF000000UL) >> 24))
#define SIZEOF_SOCKADDR(so) ((so).sa.sa_family == AF_INET6 ? \
sizeof((so).sin6) : sizeof((so).sin))
void server(void);
void sockets_alloc(struct sockets *s, unsigned int num)
{
#ifndef MAX_SOCKETS
s->sockets = calloc(num , sizeof(*s->sockets));
if (!s->sockets)
exit(1);
#endif /* !MAX_SOCKETS */
}
static inline
unsigned long long rdtsc(void)
{
#if defined(__GNUC__) || defined(__ICC)
#if defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) || defined(__i786__)
unsigned long long x;
asm volatile ("rdtsc" : "=A" (x));
return x;
#elif defined(__x86_64__)
unsigned long x;
unsigned int hi, lo;
asm volatile ("rdtsc" : "=a" (lo), "=d" (hi));
x = ((unsigned long)lo | ((unsigned long)hi << 32));
return x;
#elif defined(__powerpc__)
unsigned int hi, lo, tmp;
asm volatile ("0: \n\t"
"mftbu %0 \n\t"
"mftb %1 \n\t"
"mftbu %2 \n\t"
"cmpw %2,%0 \n\t"
"bne 0b \n"
: "=r" (hi), "=r" (lo), "=r" (tmp));
x = ((unsigned long)lo | ((unsigned long)hi << 32));
return x;
#else
return 0;
#endif /* i486 */
#elif defined(WIN32)
__asm rdtsc
#else
return 0;
#endif /* __GNUC__ || __ICC */
}
static inline void bsleep(unsigned int t)
{
unsigned long long end = rdtsc();
if (!end) {
usleep(t);
return;
}
end = rdtsc() + ((unsigned long long)t * (e_freq / 1000));
while (rdtsc() < end) ;
}
void hexdump(const unsigned char *data, size_t data_len,
FILE *output)
{
int i, k;
int off, pos, count;
int len = data_len;
k = 0;
pos = 0;
count = 16;
off = len % 16;
while (1) {
if (off) {
if ((len - pos) < 16 && (len - pos <= len - off))
count = off;
} else {
if (pos == len)
count = 0;
}
if (off == len)
count = len;
if (count)
fprintf(output, "%08X ", k++ * 16);
for (i = 0; i < count; i++) {
fprintf(output, "%02X ", data[pos + i]);
if ((i + 1) % 4 == 0)
fprintf(output, " ");
}
if (count && count < 16) {
int j;
for (j = 0; j < 16 - count; j++) {
fprintf(output, " ");
if ((j + count + 1) % 4 == 0)
fprintf(output, " ");
}
}
for (i = 0; i < count; i++) {
char ch;
if (data[pos] < 32 || data[pos] >= 127)
ch = '.';
else
ch = data[pos];
fprintf(output, "%c", ch);
pos++;
}
if (count)
fprintf(output, "\n");
if (count < 16)
break;
}
}
unsigned short ipv4_pseudo(void *iph, unsigned int len,
unsigned char ipproto)
{
unsigned short *ip_h = (unsigned short *)iph;
unsigned int csum;
csum = htons(len);
csum += (unsigned short)(ipproto << 8);
csum += (unsigned short)ip_h[6];
csum += (unsigned short)ip_h[7];
csum += (unsigned short)ip_h[8];
csum += (unsigned short)ip_h[9];
while (csum >> 16)
csum = (csum >> 16) + (csum & 0xffff);
return csum;
}
unsigned short do_csum(unsigned char *d, int len)
{
unsigned int csum = 0;
while (len > 1) {
csum += (*((unsigned short *)d)) & 0xffff;
d += 2;
len -= 2;
if (csum & 0x80000000)
csum = (csum & 0xFFFF) + (csum >> 16);
}
if (len > 0)
csum += *d;
while (csum >> 16)
csum = (csum >> 16) + (csum & 0xffff);
return ~(unsigned short)csum;
}
void thread_data_send(struct sockets *s, int offset, int num,
int loop, void *data, int datalen, int flood);
int is_ip6(const char *addr)
{
if (!addr)
return 0;
while (*addr && *addr != '%') {
if (*addr != ':' && !isxdigit((int)*addr))
return 0;
addr++;
}
return 1;
}
static int is_mc(c_sockaddr *addr, int ipv6)
{
if (!ipv6)
{
return !!IN_MULTICAST(ntohl(addr->sin.sin_addr.s_addr));
}
return !!IN6_IS_ADDR_MULTICAST(&addr->sin6.sin6_addr);
}
int c_gethostbysock(int sock, char *ip, int ip_len)
{
struct sockaddr_storage remote;
unsigned int len;
int rval;
memset(&remote, 0, sizeof(remote));
memset(ip, 0, ip_len);
len = sizeof(remote);
rval = getpeername(sock, (struct sockaddr *)&remote, &len);
if (rval < 0)
return rval;
if (getnameinfo((struct sockaddr *)&remote, len, ip, ip_len, NULL, 0,
NI_NUMERICHOST))
return -1;
return 0;
}
int c_getportbysock(int sock)
{
struct sockaddr_storage remote;
unsigned int len;
char s[NI_MAXSERV];
memset(&remote, 0, sizeof(remote));
len = sizeof(remote);
if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
return 0;
if (getnameinfo((struct sockaddr *)&remote, len, NULL, 0, s, sizeof(s),
NI_NUMERICSERV))
return 0;
return atoi(s);
}
int c_gethostbyname(char *name, int want_ipv6, char *raddr, int addr_size,
unsigned char *iphdr, int local, int *family,
int port, c_sockaddr *addr)
{
struct addrinfo hints, *ai, *tmp, *ip4 = NULL, *ip6 = NULL;
struct hostent *hp;
c_sockaddr *s;
if (e_force_ip4) {
hp = gethostbyname(name);
memcpy(&addr->sin.sin_addr, hp->h_addr_list[0], sizeof(addr->sin.sin_addr));
addr->sin.sin_family = AF_INET;
addr->sin.sin_port = port ? htons(port) : 0;
*family = AF_INET;
/* Update raw IP header */
local = local ? 12 : 16;
if (iphdr)
memcpy(iphdr + local, hp->h_addr_list[0], 4);
} else {
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
if (getaddrinfo(name, NULL, &hints, &ai))
return 0;
for (tmp = ai; tmp; tmp = tmp->ai_next) {
if (tmp->ai_family == AF_INET6) {
ip6 = tmp;
if (ip4)
break;
continue;
}
if (tmp->ai_family == AF_INET) {
ip4 = tmp;
if (ip6)
break;
continue;
}
}
tmp = (want_ipv6 ? (ip6 ? ip6 : ip4) : (ip4 ? ip4 : ip6));
if (!tmp) {
freeaddrinfo(ai);
return 0;
}
s = (c_sockaddr *)ai->ai_addr;
if (want_ipv6 && ip6) {
memcpy((unsigned char *)&addr->sin6.sin6_addr,
&s->sin6.sin6_addr, sizeof(s->sin6.sin6_addr));
addr->sin6.sin6_family = AF_INET6;
if (e_proto != SOCK_RAW)
addr->sin6.sin6_port = port ? htons(port) : 0;
addr->sin6.sin6_scope_id = s->sin6.sin6_scope_id;
*family = AF_INET6;
} else {
memcpy((unsigned char *)&addr->sin.sin_addr.s_addr,
&s->sin.sin_addr.s_addr, sizeof(s->sin.sin_addr.s_addr));
addr->sin.sin_family = AF_INET;
addr->sin.sin_port = port ? htons(port) : 0;
*family = AF_INET;
/* Update raw IP header */
local = local ? 12 : 16;
if (iphdr)
memcpy(iphdr + local, &s->sin.sin_addr.s_addr, 4);
}
if (getnameinfo(tmp->ai_addr, tmp->ai_addrlen, raddr,
addr_size, NULL, 0, NI_NUMERICHOST)) {
freeaddrinfo(ai);
return 0;
}
freeaddrinfo(ai);
}
return 1;
}
/* Convert HEX string to binary data */
unsigned char *hex2data(const char *hex, int *ret_data_len)
{
char *cp = (char *)hex;
unsigned char *data;
unsigned char l, h;
int i;
data = malloc(strlen(hex) / 2);
if (!data)
return NULL;
for (i = 0; i < strlen(hex) / 2; i++) {
h = *cp++;
l = *cp++;
h -= h < 'A' ? '0' : 'A' - 10;
l -= l < 'A' ? '0' : 'A' - 10;
data[i] = (h << 4) | (l & 0xf);
}
*ret_data_len = i;
return data;
}
/* Set socket option */
int set_sockopt(int socket, int t, int s, int val)
{
int option = val;
if (setsockopt(socket, t, s,
(void *) &option,
sizeof(int)) < 0)
{
fprintf(stderr, "setsockopt(): %s (%d %d %d) \n", strerror(errno),
t, s, val);
return -1;
}
return 0;
}
int set_sockopt2(int socket, int t, int s, void *optval, int optlen)
{
if (setsockopt(socket, t, s, optval, optlen) < 0)
{
fprintf(stderr, "setsockopt(): %s (%d %p %d) \n", strerror(errno),
t, optval, optlen);
return -1;
}
return 0;
}
static int join_mc4(int sock, int ifindex, const c_sockaddr *server,
const char *mc_source)
{
union {
struct ip_mreqn group_join;
struct ip_mreq_source group_join_source;
} req;
size_t size;
memset(&req, 0, sizeof(req));
req.group_join.imr_multiaddr = server->sin.sin_addr;
/* It would be nice to just join IP_MULTICAST_IF here and be done with ifindex
but it seems the kernel doesn't check inet->mc_ifindex and doesn't find the
device when joining the group */
if (mc_source)
{
size = sizeof(req.group_join_source);
if (inet_pton(AF_INET, mc_source,
&req.group_join_source.imr_sourceaddr) != 1)
{
fprintf(stderr, "Failed to convert %s to IP address: %s\n", mc_source,
strerror(errno));
return -1;
}
/* Since the group_join from source requires an IP address instead of an
ifindex, solve the interface and use any IP address on that interface
for the join request */
if (ifindex != -1)
{
struct ifaddrs *addrs;
if (!getifaddrs(&addrs))
{
struct ifaddrs *iter;
for (iter = addrs; iter; iter = iter->ifa_next)
{
unsigned int iter_ifindex = if_nametoindex(iter->ifa_name);
if (iter_ifindex && iter_ifindex == (unsigned int)ifindex &&
iter->ifa_addr &&
iter->ifa_addr->sa_family == AF_INET)
{
req.group_join_source.imr_interface =
((struct sockaddr_in *)iter->ifa_addr)->sin_addr;
}
}
freeifaddrs(addrs);
}
else
{
fprintf(stderr, "Failed to get interfaces: %s\n",
strerror(errno));
}
}
}
else
{
size = sizeof(req.group_join);
if (ifindex != -1)
{
req.group_join.imr_ifindex = ifindex;
}
}
if (setsockopt(sock, IPPROTO_IP,
(mc_source) ? IP_ADD_SOURCE_MEMBERSHIP : IP_ADD_MEMBERSHIP,
(void *)&req.group_join_source, size) < 0)
{
int err_save = errno;
char ipstr[INET6_ADDRSTRLEN];
fprintf(stderr, "Failed to join group: %s source: %s: %s\n",
inet_ntop(AF_INET, &server->sin.sin_addr, ipstr, sizeof(ipstr)),
mc_source, strerror(err_save));
return -1;
}
return 0;
}
/* Creates a new TCP/IP or UDP/IP server */
int create_server(int port, char *local_ip, int index,
struct sockets *sockets,
int rport, char *remote_ip, const char *mc_source)
{
int i, sock;
c_sockaddr server, remote;
char s[64], r[64];
if (e_proto == SOCK_RAW) {
fprintf(stderr, "conntest: Raw protocol not supported with -S\n");
return -1;
}
/* Do host look up */
if (local_ip) {
if (!c_gethostbyname(local_ip, e_want_ip6, s, sizeof(s), NULL, 0,
&e_sock_type, port, &server)) {
fprintf(stderr, "Host (%s) is unreachable\n", local_ip);
return -1;
}
if (!e_force_ip4 && is_ip6(s))
e_want_ip6 = 1;
} else {
/* Any address */
memset(&server, 0, sizeof(server));
if (e_want_ip6) {
e_sock_type = PF_INET6;
server.sin6.sin6_family = e_sock_type;
server.sin6.sin6_addr = in6addr_any;
} else {
server.sin.sin_family = e_sock_type;
server.sin.sin_addr.s_addr = INADDR_ANY;
}
if (port)
server.sin.sin_port = htons(port);
}
/* create the server socket */
sock = socket(e_sock_type, e_proto, e_sock_proto);
if (sock < 0) {
fprintf(stderr, "socket(): %s\n", strerror(errno));
return -1;
}
set_sockopt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
#ifdef SO_BINDTODEVICE
/* Bind to specified interface */
if (e_ifname)
setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, e_ifname,
strlen(e_ifname));
#endif /* SO_BINDTODEVICE */
if (bind(sock, (struct sockaddr *)&server, sizeof(server))) {
fprintf(stderr, "Could not bind to %s:%d: %s\n", local_ip, port,
strerror(errno));
return -1;
}
/* If UDP to multicast group, add group memberships */
if (e_proto == SOCK_DGRAM && local_ip && is_mc(&server, is_ip6(s)))
{
int ifindex = -1;
if (e_ifname)
{
ifindex = if_nametoindex(e_ifname);
if (ifindex < 0)
{
fprintf(stderr, "Failed to solve ifindex for %s: %s", e_ifname,
strerror(errno));
return -1;
}
}
if (!is_ip6(s))
{
if (join_mc4(sock, ifindex, &server, mc_source))
{
return -1;
}
}
else
{
fprintf(stderr, "IPv6 multicast joining not implementd, sorry\n");
return -1;
}
}
/* Else if UDP and remote host/port is provided, set to connected state */
else if (e_proto == SOCK_DGRAM && rport && remote_ip) {
if (!c_gethostbyname(remote_ip, e_want_ip6, r, sizeof(r), NULL, 0,
&e_sock_type, rport, &remote)) {
fprintf(stderr, "Host (%s) is unreachable\n", remote_ip);
return -1;
}
i = connect(sock, &remote.sa, SIZEOF_SOCKADDR(remote));
if (i < 0) {
fprintf(stderr, "Cannot set socket to connected state: %s\n",
strerror(errno));
}
#if defined(SO_RCVBUF)
if (set_sockopt(sock, SOL_SOCKET, SO_RCVBUF, 1000000) < 0)
set_sockopt(sock, SOL_SOCKET, SO_RCVBUF, 65535);
#endif /* SO_RCVBUF */
#if defined(SO_RCVBUFFORCE)
if (set_sockopt(sock, SOL_SOCKET, SO_RCVBUFFORCE, 1000000) < 0)
set_sockopt(sock, SOL_SOCKET, SO_RCVBUFFORCE, 65535);
#endif /* SO_RCVBUFFORCE */
}
/* TCP socket listens */
if (e_proto == SOCK_STREAM) {
if (listen(sock, 16384) < 0) {
fprintf(stderr, "Cannot set socket listenning: %s", strerror(errno));
return -1;
}
}
if (!e_quiet)
fprintf(stderr, "Starting %s %s server on %s:%d\n",
e_proto == SOCK_STREAM ? "TCP" : "UDP",
e_server_mode == SERVER_DISCARD ? "discard" :
e_server_mode == SERVER_ECHO ? "echo" :
e_server_mode == SERVER_HTTP ? "HTTP" : "?",
local_ip ? local_ip : "*" , port);
/* Non-blocking mode */
i = fcntl((int)sock, F_SETFL, fcntl(sock, F_GETFL, 0) | O_NONBLOCK);
if (i < 0) {
fprintf(stderr, "Cannot set socket non-blocking: %s\n", strerror(errno));
return -1;
}
sockets->sockets[index].sock = sock;
if (local_ip && e_proto == SOCK_DGRAM) {
inet_pton(e_sock_type, local_ip, (e_sock_type == AF_INET6) ?
(void *)&sockets->sockets[index].udp_src.sin6.sin6_addr :
(void *)&sockets->sockets[index].udp_src.sin.sin_addr);
sockets->sockets[index].udp_src.sa.sa_family = e_sock_type;
}
return sock;
}
/* Creates a new TCP/IP or UDP/IP connection. Returns the newly created
socket or -1 on error. */
int create_connection(int port, char *dhost, int index,
struct sockets *sockets)
{
int i, sock;
c_sockaddr desthost, srchost;
char src[64], dst[64];
#ifdef WIN32
unsigned long addr;
#endif
unsigned char *iph = sockets->sockets[index].iph;
unsigned char *udp = sockets->sockets[index].udp;
unsigned char *tcp = sockets->sockets[index].tcp;
struct timeval timeo;
memset(src, 0, sizeof(src));
memset(dst, 0, sizeof(dst));
memset(&timeo, 0, sizeof(timeo));
if (!e_want_ip6)
memcpy(iph, ip4_header, 20);
/* If raw protocol was given the caller must provide the IP header (or
part of it). */
if (e_sock_proto == IPPROTO_RAW && !e_want_ip6)
memcpy(iph, e_header, e_header_len < 20 ? e_header_len : 20);
/* Do host look up */
if (dhost) {
#ifndef WIN32
if (!c_gethostbyname(dhost, e_want_ip6, dst, sizeof(dst), iph, 0,
&e_sock_type, port, &desthost)) {
fprintf(stderr, "Network (%s) is unreachable\n", dhost);
return -1;
}
if (!e_force_ip4 && is_ip6(dst))
e_want_ip6 = 1;
#else
addr = inet_addr(dhost);
memcpy(&desthost.sin_addr, &addr, sizeof(desthost.sin_addr));
PUT32(iph + 16, addr);
#endif
} else {
/* Any address */
memset(&desthost, 0, sizeof(desthost));
desthost.sin.sin_family = e_sock_type;
desthost.sin.sin_addr.s_addr = INADDR_ANY;
if (port)
desthost.sin.sin_port = htons(port);
}
/* create the connection socket */
sock = socket(e_sock_type, e_proto, e_sock_proto);
if (sock < 0) {
fprintf(stderr, "socket(): %s\n", strerror(errno));
return -1;
}
#ifdef SO_BINDTODEVICE
/* Bind to specified interface */
if (e_ifname)
setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, e_ifname, strlen(e_ifname));
#endif /* SO_BINDTODEVICE */
#ifdef IP_TOS
if (e_tos) {
if (!e_want_ip6)
set_sockopt(sock, SOL_IP, IP_TOS, e_tos);
else
set_sockopt(sock, SOL_IPV6, IPV6_TCLASS, e_tos);
iph[1] = e_tos;
}
#endif /* IP_TOS */
/* If raw sockets and local IP is selected or is provided in data, set
IP_HRDINCL sockopt so we can specify our own IP. */
if (e_proto == SOCK_RAW && (e_lip || e_sock_proto == IPPROTO_RAW)) {
#ifndef WIN32
if (!e_want_ip6)
set_sockopt(sock, IPPROTO_IP, IP_HDRINCL, 1);
#endif
if (e_sock_proto != IPPROTO_RAW && !e_want_ip6)
iph[9] = e_sock_proto;
}
/* Bind to local IP and port */
if (e_lip || e_lport) {
#ifndef WIN32
if (e_lip) {
if (!c_gethostbyname(e_lip, e_want_ip6, src, sizeof(src), iph, 1,
&e_sock_type, e_lport, &srchost)) {
fprintf(stderr, "Network (%s) is unreachable\n", e_lip);
return -1;
}
} else {
/* Any address */
memset(&srchost, 0, sizeof(srchost));
srchost.sin.sin_family = e_sock_type;
srchost.sin.sin_addr.s_addr = INADDR_ANY;
if (e_lport)
srchost.sin.sin_port = htons(e_lport);
}
#else
if (e_lip) {
addr = inet_addr(e_lip);
memcpy(&srchost.sin_addr, &addr, sizeof(srchost.sin_addr));
PUT32(iph + 12, addr);
}
#endif
if (e_proto != SOCK_RAW) {
if (bind(sock, (struct sockaddr *)&srchost, sizeof(srchost))) {
fprintf(stderr, "Could not bind to %s:%d\n", e_lip, e_lport);
exit(1);
}
}
}
/* If user provided header (-D) is not present in raw UDP protocol, let's
provide valid UDP header. */
if (e_proto == SOCK_RAW && e_sock_proto == IPPROTO_UDP && !e_want_ip6 &&
!e_header) {
if (!srchost.sin.sin_port)
PUT16(udp, 9);
else
memcpy(udp, &srchost.sin.sin_port, 2);
memcpy(udp + 2, &desthost.sin.sin_port, 2);
if (e_lip)
PUT16(udp + 4, e_data_len - 20);
else
PUT16(udp + 4, e_data_len);
PUT16(udp + 6, 0); /* But no checksum */
}
/* If user provided header (-D) is not present in raw TCP protocol, let's
provide "valid" TCP header. */
if (e_proto == SOCK_RAW && e_sock_proto == IPPROTO_TCP && !e_want_ip6 &&
!e_header) {
if (!srchost.sin.sin_port)
PUT16(tcp, 9);
else
memcpy(tcp, &srchost.sin.sin_port, 2);
memcpy(tcp + 2, &desthost.sin.sin_port, 2);
PUT32(tcp + 4, 1); /* seqno */
PUT32(tcp + 8, 0); /* ack */
tcp[12] = 0x50; /* length */
tcp[13] = e_tcp_flags; /* flags, 8 bits */