/* ** 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" #define L2_SOCKET_SABUFREAD 4096 #define L2_SOCKET_SABUFWRITE 4096 /* declare private channel configuration */ typedef struct { sa_addr_t *saaServer; sa_t *saServer; long lTimeout; char *szHost; /* IP Address or name of host to connect to */ int iProto; /* Protocol to use, IPPROTO_TCP or IPPROTO_UDP */ int iPort; /* TCP Port to connect to */ int iSocket; /* Socket descriptor used during writing */ } 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->saaServer = NULL; cfg->saServer = NULL; cfg->lTimeout = 30; cfg->szHost = NULL; cfg->iProto = -1; cfg->iPort = 0; cfg->iSocket = -1; /* 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; char *szProtocol = NULL; l2_param_t pa[5]; l2_result_t rv; /* feed and call generic parameter parsing engine */ L2_PARAM_SET(pa[0], protocol, STRING, &szProtocol); L2_PARAM_SET(pa[1], timeout, INT, &cfg->lTimeout); L2_PARAM_SET(pa[2], host, CHARPTR, &cfg->szHost); L2_PARAM_SET(pa[3], port, INT, &cfg->iPort); L2_PARAM_END(pa[4]); rv = l2_util_setparams(pa, fmt, ap); /* translate incoming configuration parameters */ if (szProtocol != NULL) { if (strcmp(szProtocol, "IPPROTO_UDP") == 0) cfg->iProto = IPPROTO_UDP; else if (strcmp(szProtocol, "IPPROTO_TCP") == 0) cfg->iProto = IPPROTO_TCP; else return L2_ERR_ARG; } free(szProtocol); return rv; } /* open channel */ static l2_result_t hook_open(l2_context_t *ctx, l2_channel_t *ch) { sa_rc_t rc; l2_ch_socket_t *cfg = (l2_ch_socket_t *)ctx->vp; /* make sure a path was set */ if (cfg->szHost == NULL) return L2_ERR_USE; /* create socket address */ if ((rc = sa_addr_create(&cfg->saaServer)) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); if ((rc = sa_addr_u2a(cfg->saaServer, "inet://%s:%d", cfg->szHost, cfg->iPort)) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); /* create socket */ if ((rc = sa_create(&cfg->saServer)) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); /* configure socket parameters */ sa_timeout(cfg->saServer, SA_TIMEOUT_ALL, cfg->lTimeout, 0); sa_buffer (cfg->saServer, SA_BUFFER_READ, L2_SOCKET_SABUFREAD); sa_buffer (cfg->saServer, SA_BUFFER_WRITE, L2_SOCKET_SABUFWRITE); 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_t *sa; sa_rc_t rc; sa_addr_t *saa; /* parameter checks */ assert(cfg->saServer != NULL); /* establish connection to server */ saa = cfg->saaServer; sa = cfg->saServer; if ((rc = sa_connect(sa, saa)) != SA_OK) { sa_shutdown(sa, "rw"); /* shutdown connection to server */ return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); } if (cfg->iProto == IPPROTO_TCP) { /* write message to channel socket, but check to make */ /* sure that the whole message was successfully written */ sizeWrite = 0; sizeRemain = buf_size; while(sizeRemain) { if ((rc = sa_write(sa, buf, sizeRemain, &sizeWrite)) != SA_OK) return (rc == SA_ERR_SYS ? L2_ERR_SYS : L2_ERR_INT); sizeRemain = sizeRemain - sizeWrite; /* how much is left? */ } } 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; /* parameter checks */ /* FIXME! assert(cfg->saServer->fdSocket != -1); */ /* destroy remote address */ if (cfg->saServer != NULL) { sa_destroy(cfg->saServer); cfg->saServer = NULL; } if (cfg->saaServer != NULL) { sa_addr_destroy(cfg->saaServer); cfg->saaServer = 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 */ free(cfg); return L2_OK; } /* exported channel handler structure */ l2_handler_t l2_handler_socket = { L2_CHANNEL_OUTPUT, hook_create, hook_configure, hook_open, hook_write, NULL, hook_close, hook_destroy };