/* ** L2 - OSSP Logging Library ** Copyright (c) 2001 The OSSP Project (http://www.ossp.org/) ** Copyright (c) 2001 Cable & Wireless Deutschland (http://www.cw.com/de/) ** ** This file is part of OSSP L2, a flexible logging library which ** can be found at http://www.ossp.org/pkg/l2/. ** ** Permission to use, copy, modify, and distribute this software for ** any purpose with or without fee is hereby granted, provided that ** the above copyright notice and this permission notice appear in all ** copies. ** ** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED ** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF ** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, ** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF ** SUCH DAMAGE. ** ** l2_ch_socket.c: socket channel implementation */ #include #include #include #include #include #include #include #include "l2.h" #include "l2_p.h" /* declare private channel configuration */ typedef struct { char *szProto; char *szHost; char *szPort; long nTimeout; sa_addr_t *saaRemote; sa_t *saRemote; } l2_ch_socket_t; /* create channel */ static l2_result_t hook_create(l2_context_t *ctx, l2_channel_t *ch) { l2_ch_socket_t *cfg = NULL; /* allocate private channel configuration */ if ((cfg = (l2_ch_socket_t *)malloc(sizeof(l2_ch_socket_t))) == NULL) return L2_ERR_MEM; /* initialize configuration with reasonable defaults */ cfg->szProto = strdup("tcp"); cfg->szHost = NULL; cfg->szPort = NULL; cfg->nTimeout = 30; cfg->saaRemote = NULL; cfg->saRemote = NULL; /* link private channel configuration into channel context */ ctx->vp = cfg; return L2_OK; } /* configure channel */ static l2_result_t hook_configure(l2_context_t *ctx, l2_channel_t *ch, const char *fmt, va_list ap) { l2_ch_socket_t *cfg = (l2_ch_socket_t *)ctx->vp; l2_param_t pa[5]; l2_result_t rv; l2_env_t *env; /* feed and call generic parameter parsing engine */ L2_PARAM_SET(pa[0], proto, STR, &cfg->szProto); L2_PARAM_SET(pa[1], host, STR, &cfg->szHost); L2_PARAM_SET(pa[2], port, STR, &cfg->szPort); L2_PARAM_SET(pa[3], timeout, INT, &cfg->nTimeout); L2_PARAM_END(pa[4]); l2_channel_env(ch, &env); rv = l2_util_setparams(env, pa, fmt, ap); /* sanity check configuration parameters */ if ( cfg->szProto != NULL && !( strcmp(cfg->szProto, "udp") == 0 || strcmp(cfg->szProto, "tcp") == 0)) return L2_ERR_ARG; return rv; } /* open channel */ static l2_result_t hook_open(l2_context_t *ctx, l2_channel_t *ch) { l2_ch_socket_t *cfg = (l2_ch_socket_t *)ctx->vp; sa_rc_t rc; /* make sure a path was set */ if (cfg->szHost == NULL || cfg->szPort == NULL) return L2_ERR_USE; /* create socket address */ if ((rc = sa_addr_create(&cfg->saaRemote)) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); if ((rc = sa_addr_u2a(cfg->saaRemote, "inet://%s:%s", cfg->szHost, cfg->szPort)) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); /* create socket */ if ((rc = sa_create(&cfg->saRemote)) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); /* configure socket parameters */ sa_timeout(cfg->saRemote, SA_TIMEOUT_ALL, cfg->nTimeout, 0); if (strcmp(cfg->szProto, "tcp") == 0) { sa_buffer(cfg->saRemote, SA_BUFFER_READ, 4096); sa_buffer(cfg->saRemote, SA_BUFFER_WRITE, 4096); } return L2_OK; } /* write to channel */ static l2_result_t hook_write(l2_context_t *ctx, l2_channel_t *ch, l2_level_t level, const char *buf, size_t buf_size) { l2_ch_socket_t *cfg = (l2_ch_socket_t *)ctx->vp; size_t sizeWrite; size_t sizeRemain; sa_rc_t rc; /* establish connection to server (TCP only) */ if (strcmp(cfg->szProto, "tcp") == 0) { if ((rc = sa_connect(cfg->saRemote, cfg->saaRemote)) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); } /* write message to channel socket, but check to make sure that the whole message was successfully written */ sizeWrite = 0; sizeRemain = buf_size; while (sizeRemain > 0) { if (strcmp(cfg->szProto, "tcp") == 0) rc = sa_write(cfg->saRemote, buf, sizeRemain, &sizeWrite); else rc = sa_send(cfg->saRemote, buf, sizeRemain, &sizeWrite, cfg->saaRemote); if (rc != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); sizeRemain = sizeRemain - sizeWrite; /* how much is left? */ } /* shutdown connection to server (TCP only) */ if (strcmp(cfg->szProto, "tcp") == 0) { if ((rc = sa_shutdown(cfg->saRemote, "rw")) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); } return L2_OK; } /* close channel */ static l2_result_t hook_close(l2_context_t *ctx, l2_channel_t *ch) { l2_ch_socket_t *cfg = (l2_ch_socket_t *)ctx->vp; /* destroy remote address */ if (cfg->saRemote != NULL) { sa_destroy(cfg->saRemote); cfg->saRemote = NULL; } if (cfg->saaRemote != NULL) { sa_addr_destroy(cfg->saaRemote); cfg->saaRemote = NULL; } return L2_OK; } /* destroy channel */ static l2_result_t hook_destroy(l2_context_t *ctx, l2_channel_t *ch) { l2_ch_socket_t *cfg = (l2_ch_socket_t *)ctx->vp; /* destroy channel configuration */ if (cfg->szProto != NULL) free(cfg->szProto); if (cfg->szHost != NULL) free(cfg->szHost); if (cfg->szPort != NULL) free(cfg->szPort); free(cfg); return L2_OK; } /* exported channel handler structure */ l2_handler_t l2_handler_socket = { "socket", L2_CHANNEL_OUTPUT, hook_create, hook_configure, hook_open, hook_write, NULL, hook_close, hook_destroy };