X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=dccp_recv.c;h=f71a7253a0296e8c0f849147287b5cede93233e0;hp=58c969a255335461d0481e8864ec79fb41269dac;hb=b0fe6d882dd35b01360a66e130d6714aff7b6a0d;hpb=f113a41a633c0541f0d8418baf40205f4553c885 diff --git a/dccp_recv.c b/dccp_recv.c index 58c969a2..f71a7253 100644 --- a/dccp_recv.c +++ b/dccp_recv.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2006-2009 Andre Noll + * Copyright (C) 2006-2010 Andre Noll * * Licensed under the GPL v2. For licencing details see COPYING. */ @@ -24,12 +24,10 @@ #include "string.h" #include "net.h" #include "fd.h" +#include "buffer_tree.h" #include "dccp_recv.cmdline.h" -/** the size of the output buffer */ -#define DCCP_BUFSIZE 40960 - /** * data specific to the dccp receiver * @@ -38,6 +36,7 @@ struct private_dccp_recv_data { /** the file descriptor for the dccp socket */ int fd; + struct btr_pool *btrp; }; @@ -48,8 +47,7 @@ static void dccp_recv_close(struct receiver_node *rn) if (pdd && pdd->fd > 0) close(pdd->fd); - free(rn->buf); - rn->buf = NULL; + btr_pool_free(pdd->btrp); free(rn->private_data); rn->private_data = NULL; } @@ -59,12 +57,25 @@ static int dccp_recv_open(struct receiver_node *rn) { struct private_dccp_recv_data *pdd; struct dccp_recv_args_info *conf = rn->conf; - int fd, ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg, - conf->port_arg); + struct flowopts *fo = NULL; + uint8_t *ccids = NULL; + int fd, ret, i; - if (ret < 0) - return ret; - fd = ret; + /* Copy CCID preference list (u8 array required) */ + if (conf->ccid_given) { + ccids = para_malloc(conf->ccid_given); + fo = flowopt_new(); + + for (i = 0; i < conf->ccid_given; i++) + ccids[i] = conf->ccid_arg[i]; + + OPT_ADD(fo, SOL_DCCP, DCCP_SOCKOPT_CCID, ccids, i); + } + + fd = makesock(IPPROTO_DCCP, 0, conf->host_arg, conf->port_arg, fo); + free(ccids); + if (fd < 0) + return fd; /* * Disable unused CCIDs: the receiver does not send any application * data to the server. By shutting down this unused path we reduce @@ -78,8 +89,8 @@ static int dccp_recv_open(struct receiver_node *rn) ret = mark_fd_nonblocking(fd); if (ret < 0) goto err; - rn->buf = para_calloc(DCCP_BUFSIZE); rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data)); + pdd->btrp = btr_pool_new("dccp_recv", 320 * 1024); pdd->fd = fd; return 1; err: @@ -87,16 +98,38 @@ err: return ret; } -static void dccp_shutdown(void) +/** + * Check whether the host supports the requested 'ccid' arguments. + * \param conf DCCP receiver arguments. + * \return True if all CCIDs requested in \a conf are supported. + */ +static bool dccp_recv_ccid_support_check(struct dccp_recv_args_info *conf) { - ; /* nothing to do */ + uint8_t *ccids; + int i, j, nccids; + + nccids = dccp_available_ccids(&ccids); + if (nccids <= 0) + return false; + + for (i = 0; i < conf->ccid_given; i++) { + for (j = 0; j < nccids && ccids[j] != conf->ccid_arg[i]; j++) + ; + if (j == nccids) { + PARA_ERROR_LOG("'CCID-%d' not supported on this host.\n", + conf->ccid_arg[i]); + return false; + } + } + return true; } static void *dccp_recv_parse_config(int argc, char **argv) { - struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info)); + struct dccp_recv_args_info *tmp = para_calloc(sizeof(*tmp)); - if (!dccp_recv_cmdline_parser(argc, argv, tmp)) + if (!dccp_recv_cmdline_parser(argc, argv, tmp) && + dccp_recv_ccid_support_check(tmp)) return tmp; free(tmp); return NULL; @@ -108,6 +141,8 @@ static void dccp_recv_pre_select(struct sched *s, struct task *t) struct private_dccp_recv_data *pdd = rn->private_data; t->error = 0; + if (generic_recv_pre_select(s, t) <= 0) + return; para_fd_set(pdd->fd, &s->rfds, &s->max_fileno); } @@ -115,25 +150,45 @@ static void dccp_recv_post_select(struct sched *s, struct task *t) { struct receiver_node *rn = container_of(t, struct receiver_node, task); struct private_dccp_recv_data *pdd = rn->private_data; + struct btr_node *btrn = rn->btrn; + struct iovec iov[2]; + int ret, iovcnt; - if (rn->output_error && *rn->output_error < 0) { - t->error = *rn->output_error; + ret = btr_node_status(btrn, 0, BTR_NT_ROOT); + if (ret < 0) + goto err; + if (ret == 0) return; - } if (!FD_ISSET(pdd->fd, &s->rfds)) return; /* nothing to do */ - if (rn->loaded >= DCCP_BUFSIZE) { - t->error = -E_DCCP_OVERRUN; - return; - } - t->error = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded, - DCCP_BUFSIZE - rn->loaded); - if (t->error > 0) { - rn->loaded += t->error; + iovcnt = btr_pool_get_buffers(pdd->btrp, iov); + ret = -E_DCCP_OVERRUN; + if (iovcnt == 0) + goto err; + ret = para_readv(pdd->fd, iov, iovcnt); + /* EAGAIN is possible even if FD_ISSET */ + if (ret < 0 && is_errno(-ret, EAGAIN)) return; + if (ret == 0) + ret = -E_RECV_EOF; + if (ret < 0) + goto err; + if (ret <= iov[0].iov_len) /* only the first buffer was filled */ + btr_add_output_pool(pdd->btrp, ret, btrn); + else { /* both buffers contain data */ + btr_add_output_pool(pdd->btrp, iov[0].iov_len, btrn); + btr_add_output_pool(pdd->btrp, ret - iov[0].iov_len, btrn); } - if (!t->error) - t->error = -E_RECV_EOF; + return; +err: + btr_remove_node(rn->btrn); + t->error = ret; +} + +static void dccp_recv_free_config(void *conf) +{ + dccp_recv_cmdline_parser_free(conf); + free(conf); } /** @@ -148,12 +203,12 @@ void dccp_recv_init(struct receiver *r) struct dccp_recv_args_info dummy; dccp_recv_cmdline_parser_init(&dummy); - r->shutdown = dccp_shutdown; r->open = dccp_recv_open; r->close = dccp_recv_close; r->pre_select = dccp_recv_pre_select; r->post_select = dccp_recv_post_select; r->parse_config = dccp_recv_parse_config; + r->free_config = dccp_recv_free_config; r->help = (struct ggo_help) { .short_help = dccp_recv_args_info_help, .detailed_help = dccp_recv_args_info_detailed_help