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- `output.tcpcli`: Issue DNS-OARC#47: Add simple TCP client - `output.udpcli`: `socket()` does not need protocol
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,204 @@ | ||
| /* | ||
| * Copyright (c) 2018, OARC, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This file is part of dnsjit. | ||
| * | ||
| * dnsjit 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 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * dnsjit is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with dnsjit. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| #include "config.h" | ||
|
|
||
| #include "output/tcpcli.h" | ||
| #include "core/object/dns.h" | ||
| #include "core/object/udp.h" | ||
| #include "core/object/tcp.h" | ||
|
|
||
| #include <sys/types.h> | ||
| #include <sys/socket.h> | ||
| #include <netdb.h> | ||
| #include <unistd.h> | ||
| #include <fcntl.h> | ||
| #include <string.h> | ||
| #include <errno.h> | ||
| #include <arpa/inet.h> | ||
|
|
||
| static core_log_t _log = LOG_T_INIT("output.tcpcli"); | ||
| static output_tcpcli_t _defaults = { | ||
| LOG_T_INIT_OBJ("output.tcpcli"), | ||
| 0, 0, -1, | ||
| }; | ||
|
|
||
| core_log_t* output_tcpcli_log() | ||
| { | ||
| return &_log; | ||
| } | ||
|
|
||
| int output_tcpcli_init(output_tcpcli_t* self, const char* host, const char* port) | ||
| { | ||
| struct addrinfo* addr; | ||
| int err; | ||
|
|
||
| if (!self || !host || !port) { | ||
| return 1; | ||
| } | ||
|
|
||
| *self = _defaults; | ||
|
|
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| ldebug("init %s %s", host, port); | ||
|
|
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| if ((err = getaddrinfo(host, port, 0, &addr))) { | ||
| lcritical("getaddrinfo() %d", err); | ||
| return 1; | ||
| } | ||
| if (!addr) { | ||
| lcritical("getaddrinfo failed"); | ||
| return 1; | ||
| } | ||
| ldebug("getaddrinfo() flags: 0x%x family: 0x%x socktype: 0x%x protocol: 0x%x addrlen: %d", | ||
| addr->ai_flags, | ||
| addr->ai_family, | ||
| addr->ai_socktype, | ||
| addr->ai_protocol, | ||
| addr->ai_addrlen); | ||
|
|
||
| if ((self->fd = socket(addr->ai_addr->sa_family, SOCK_STREAM, 0)) < 0) { | ||
| lcritical("socket failed"); | ||
| freeaddrinfo(addr); | ||
| return 1; | ||
| } | ||
|
|
||
| if (connect(self->fd, addr->ai_addr, addr->ai_addrlen)) { | ||
| lcritical("connect failed"); | ||
| freeaddrinfo(addr); | ||
| close(self->fd); | ||
| self->fd = -1; | ||
| return 1; | ||
| } | ||
|
|
||
| freeaddrinfo(addr); | ||
|
|
||
| if ((err = fcntl(self->fd, F_GETFL)) == -1 | ||
| || fcntl(self->fd, F_SETFL, err | O_NONBLOCK)) { | ||
| lcritical("fcntl failed"); | ||
| } | ||
|
|
||
| return 0; | ||
| } | ||
|
|
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| int output_tcpcli_destroy(output_tcpcli_t* self) | ||
| { | ||
| if (!self) { | ||
| return 1; | ||
| } | ||
|
|
||
| ldebug("destroy"); | ||
|
|
||
| if (self->fd > -1) { | ||
| shutdown(self->fd, SHUT_RDWR); | ||
| close(self->fd); | ||
| } | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| static int _receive(void* ctx, const core_object_t* obj) | ||
| { | ||
| output_tcpcli_t* self = (output_tcpcli_t*)ctx; | ||
| const uint8_t* payload; | ||
| size_t len, sent; | ||
| uint16_t dnslen; | ||
|
|
||
| if (!self) { | ||
| return 1; | ||
| } | ||
|
|
||
| for (; obj;) { | ||
| switch (obj->obj_type) { | ||
| case CORE_OBJECT_DNS: | ||
| obj = obj->obj_prev; | ||
| continue; | ||
| case CORE_OBJECT_UDP: | ||
| payload = ((core_object_udp_t*)obj)->payload; | ||
| len = ((core_object_udp_t*)obj)->len; | ||
| break; | ||
| case CORE_OBJECT_TCP: | ||
| payload = ((core_object_tcp_t*)obj)->payload; | ||
| len = ((core_object_tcp_t*)obj)->len; | ||
| break; | ||
| default: | ||
| return 1; | ||
| } | ||
|
|
||
| if (len < 3 || payload[2] & 0x80) { | ||
| return 0; | ||
| } | ||
|
|
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| sent = 0; | ||
| self->pkts++; | ||
|
|
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| dnslen = htons(len); | ||
|
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| for (;;) { | ||
| ssize_t ret = sendto(self->fd, ((uint8_t*)&dnslen) + sent, sizeof(dnslen) - sent, 0, 0, 0); | ||
| if (ret > -1) { | ||
| sent += ret; | ||
| if (sent < sizeof(dnslen)) | ||
| continue; | ||
|
|
||
| sent = 0; | ||
| for (;;) { | ||
| ssize_t ret = sendto(self->fd, payload + sent, len - sent, 0, 0, 0); | ||
| if (ret > -1) { | ||
| sent += ret; | ||
| if (sent < len) | ||
| continue; | ||
| return 0; | ||
| } | ||
| switch (errno) { | ||
| case EAGAIN: | ||
| #if EAGAIN != EWOULDBLOCK | ||
| case EWOULDBLOCK: | ||
| #endif | ||
| continue; | ||
| default: | ||
| break; | ||
| } | ||
| self->errs++; | ||
| break; | ||
| } | ||
| break; | ||
| } | ||
| switch (errno) { | ||
| case EAGAIN: | ||
| #if EAGAIN != EWOULDBLOCK | ||
| case EWOULDBLOCK: | ||
| #endif | ||
| continue; | ||
| default: | ||
| break; | ||
| } | ||
| self->errs++; | ||
| break; | ||
| } | ||
| break; | ||
| } | ||
|
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| return 1; | ||
| } | ||
|
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||
| core_receiver_t output_tcpcli_receiver() | ||
| { | ||
| return _receive; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| /* | ||
| * Copyright (c) 2018, OARC, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This file is part of dnsjit. | ||
| * | ||
| * dnsjit 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 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * dnsjit is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with dnsjit. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| #include "core/log.h" | ||
| #include "core/receiver.h" | ||
|
|
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| #ifndef __dnsjit_output_tcpcli_h | ||
| #define __dnsjit_output_tcpcli_h | ||
|
|
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| #include "output/tcpcli.hh" | ||
|
|
||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| /* | ||
| * Copyright (c) 2018, OARC, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This file is part of dnsjit. | ||
| * | ||
| * dnsjit 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 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * dnsjit is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with dnsjit. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| //lua:require("dnsjit.core.log") | ||
| //lua:require("dnsjit.core.receiver_h") | ||
|
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| typedef struct output_tcpcli { | ||
| core_log_t _log; | ||
| size_t pkts, errs; | ||
| int fd; | ||
| } output_tcpcli_t; | ||
|
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| core_log_t* output_tcpcli_log(); | ||
|
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| int output_tcpcli_init(output_tcpcli_t* self, const char* host, const char* port); | ||
| int output_tcpcli_destroy(output_tcpcli_t* self); | ||
|
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| core_receiver_t output_tcpcli_receiver(); |
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