diff options
Diffstat (limited to 'connect.c')
| -rw-r--r-- | connect.c | 253 |
1 files changed, 168 insertions, 85 deletions
@@ -9,32 +9,29 @@ #include "url.h" #include "string-list.h" #include "sha1-array.h" +#include "transport.h" static char *server_capabilities; static const char *parse_feature_value(const char *, const char *, int *); -static int check_ref(const char *name, int len, unsigned int flags) +static int check_ref(const char *name, unsigned int flags) { if (!flags) return 1; - if (len < 5 || memcmp(name, "refs/", 5)) + if (!skip_prefix(name, "refs/", &name)) return 0; - /* Skip the "refs/" part */ - name += 5; - len -= 5; - /* REF_NORMAL means that we don't want the magic fake tag refs */ if ((flags & REF_NORMAL) && check_refname_format(name, 0)) return 0; /* REF_HEADS means that we want regular branch heads */ - if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6)) + if ((flags & REF_HEADS) && starts_with(name, "heads/")) return 1; /* REF_TAGS means that we want tags */ - if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5)) + if ((flags & REF_TAGS) && starts_with(name, "tags/")) return 1; /* All type bits clear means that we are ok with anything */ @@ -43,7 +40,7 @@ static int check_ref(const char *name, int len, unsigned int flags) int check_ref_type(const struct ref *ref, int flags) { - return check_ref(ref->name, strlen(ref->name), flags); + return check_ref(ref->name, flags); } static void die_initial_contact(int got_at_least_one_head) @@ -97,7 +94,7 @@ static void annotate_refs_with_symref_info(struct ref *ref) parse_one_symref_info(&symref, val, len); feature_list = val + 1; } - sort_string_list(&symref); + string_list_sort(&symref); for (; ref; ref = ref->next) { struct string_list_item *item; @@ -123,10 +120,11 @@ struct ref **get_remote_heads(int in, char *src_buf, size_t src_len, *list = NULL; for (;;) { struct ref *ref; - unsigned char old_sha1[20]; + struct object_id old_oid; char *name; int len, name_len; char *buffer = packet_buffer; + const char *arg; len = packet_read(in, &src_buf, &src_len, packet_buffer, sizeof(packet_buffer), @@ -138,38 +136,39 @@ struct ref **get_remote_heads(int in, char *src_buf, size_t src_len, if (!len) break; - if (len > 4 && starts_with(buffer, "ERR ")) - die("remote error: %s", buffer + 4); + if (len > 4 && skip_prefix(buffer, "ERR ", &arg)) + die("remote error: %s", arg); - if (len == 48 && starts_with(buffer, "shallow ")) { - if (get_sha1_hex(buffer + 8, old_sha1)) - die("protocol error: expected shallow sha-1, got '%s'", buffer + 8); + if (len == GIT_SHA1_HEXSZ + strlen("shallow ") && + skip_prefix(buffer, "shallow ", &arg)) { + if (get_oid_hex(arg, &old_oid)) + die("protocol error: expected shallow sha-1, got '%s'", arg); if (!shallow_points) die("repository on the other end cannot be shallow"); - sha1_array_append(shallow_points, old_sha1); + sha1_array_append(shallow_points, old_oid.hash); continue; } - if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ') + if (len < GIT_SHA1_HEXSZ + 2 || get_oid_hex(buffer, &old_oid) || + buffer[GIT_SHA1_HEXSZ] != ' ') die("protocol error: expected sha/ref, got '%s'", buffer); - name = buffer + 41; + name = buffer + GIT_SHA1_HEXSZ + 1; name_len = strlen(name); - if (len != name_len + 41) { + if (len != name_len + GIT_SHA1_HEXSZ + 1) { free(server_capabilities); server_capabilities = xstrdup(name + name_len + 1); } - if (extra_have && - name_len == 5 && !memcmp(".have", name, 5)) { - sha1_array_append(extra_have, old_sha1); + if (extra_have && !strcmp(name, ".have")) { + sha1_array_append(extra_have, old_oid.hash); continue; } - if (!check_ref(name, name_len, flags)) + if (!check_ref(name, flags)) continue; - ref = alloc_ref(buffer + 41); - hashcpy(ref->old_sha1, old_sha1); + ref = alloc_ref(buffer + GIT_SHA1_HEXSZ + 1); + oidcpy(&ref->old_oid, &old_oid); *list = ref; list = &ref->next; got_at_least_one_head = 1; @@ -258,7 +257,7 @@ static const char *prot_name(enum protocol protocol) case PROTO_GIT: return "git"; default: - return "unkown protocol"; + return "unknown protocol"; } } @@ -268,37 +267,55 @@ static enum protocol get_protocol(const char *name) return PROTO_SSH; if (!strcmp(name, "git")) return PROTO_GIT; - if (!strcmp(name, "git+ssh")) + if (!strcmp(name, "git+ssh")) /* deprecated - do not use */ return PROTO_SSH; - if (!strcmp(name, "ssh+git")) + if (!strcmp(name, "ssh+git")) /* deprecated - do not use */ return PROTO_SSH; if (!strcmp(name, "file")) return PROTO_FILE; die("I don't handle protocol '%s'", name); } +static char *host_end(char **hoststart, int removebrackets) +{ + char *host = *hoststart; + char *end; + char *start = strstr(host, "@["); + if (start) + start++; /* Jump over '@' */ + else + start = host; + if (start[0] == '[') { + end = strchr(start + 1, ']'); + if (end) { + if (removebrackets) { + *end = 0; + memmove(start, start + 1, end - start); + end++; + } + } else + end = host; + } else + end = host; + return end; +} + #define STR_(s) # s #define STR(s) STR_(s) static void get_host_and_port(char **host, const char **port) { char *colon, *end; - - if (*host[0] == '[') { - end = strchr(*host + 1, ']'); - if (end) { - *end = 0; - end++; - (*host)++; - } else - end = *host; - } else - end = *host; + end = host_end(host, 1); colon = strchr(end, ':'); - if (colon) { - *colon = 0; - *port = colon + 1; + long portnr = strtol(colon + 1, &end, 10); + if (end != colon + 1 && *end == '\0' && 0 <= portnr && portnr < 65536) { + *colon = 0; + *port = colon + 1; + } else if (!colon[1]) { + *colon = 0; + } } } @@ -318,7 +335,7 @@ static const char *ai_name(const struct addrinfo *ai) static char addr[NI_MAXHOST]; if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0, NI_NUMERICHOST) != 0) - strcpy(addr, "(unknown)"); + xsnprintf(addr, sizeof(addr), "(unknown)"); return addr; } @@ -340,6 +357,10 @@ static int git_tcp_connect_sock(char *host, int flags) port = "<none>"; memset(&hints, 0, sizeof(hints)); + if (flags & CONNECT_IPV4) + hints.ai_family = AF_INET; + else if (flags & CONNECT_IPV6) + hints.ai_family = AF_INET6; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; @@ -532,34 +553,34 @@ static int git_use_proxy(const char *host) static struct child_process *git_proxy_connect(int fd[2], char *host) { const char *port = STR(DEFAULT_GIT_PORT); - const char **argv; struct child_process *proxy; get_host_and_port(&host, &port); - argv = xmalloc(sizeof(*argv) * 4); - argv[0] = git_proxy_command; - argv[1] = host; - argv[2] = port; - argv[3] = NULL; - proxy = xcalloc(1, sizeof(*proxy)); - proxy->argv = argv; + proxy = xmalloc(sizeof(*proxy)); + child_process_init(proxy); + argv_array_push(&proxy->args, git_proxy_command); + argv_array_push(&proxy->args, host); + argv_array_push(&proxy->args, port); proxy->in = -1; proxy->out = -1; if (start_command(proxy)) - die("cannot start proxy %s", argv[0]); + die("cannot start proxy %s", git_proxy_command); fd[0] = proxy->out; /* read from proxy stdout */ fd[1] = proxy->in; /* write to proxy stdin */ return proxy; } -static const char *get_port_numeric(const char *p) +static char *get_port(char *host) { char *end; + char *p = strchr(host, ':'); + if (p) { long port = strtol(p + 1, &end, 10); if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) { - return p; + *p = '\0'; + return p+1; } } @@ -601,14 +622,7 @@ static enum protocol parse_connect_url(const char *url_orig, char **ret_host, * Don't do destructive transforms as protocol code does * '[]' unwrapping in get_host_and_port() */ - if (host[0] == '[') { - end = strchr(host + 1, ']'); - if (end) { - end++; - } else - end = host; - } else - end = host; + end = host_end(&host, 0); if (protocol == PROTO_LOCAL) path = end; @@ -642,7 +656,20 @@ static enum protocol parse_connect_url(const char *url_orig, char **ret_host, return protocol; } -static struct child_process no_fork; +static struct child_process no_fork = CHILD_PROCESS_INIT; + +static const char *get_ssh_command(void) +{ + const char *ssh; + + if ((ssh = getenv("GIT_SSH_COMMAND"))) + return ssh; + + if (!git_config_get_string_const("core.sshcommand", &ssh)) + return ssh; + + return NULL; +} /* * This returns a dummy child_process if the transport protocol does not @@ -661,7 +688,6 @@ struct child_process *git_connect(int fd[2], const char *url, char *hostandport, *path; struct child_process *conn = &no_fork; enum protocol protocol; - const char **arg; struct strbuf cmd = STRBUF_INIT; /* Without this we cannot rely on waitpid() to tell @@ -670,17 +696,29 @@ struct child_process *git_connect(int fd[2], const char *url, signal(SIGCHLD, SIG_DFL); protocol = parse_connect_url(url, &hostandport, &path); - if (flags & CONNECT_DIAG_URL) { + if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) { printf("Diag: url=%s\n", url ? url : "NULL"); printf("Diag: protocol=%s\n", prot_name(protocol)); printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL"); printf("Diag: path=%s\n", path ? path : "NULL"); conn = NULL; } else if (protocol == PROTO_GIT) { + /* + * Set up virtual host information based on where we will + * connect, unless the user has overridden us in + * the environment. + */ + char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST"); + if (target_host) + target_host = xstrdup(target_host); + else + target_host = xstrdup(hostandport); + + transport_check_allowed("git"); + /* These underlying connection commands die() if they * cannot connect. */ - char *target_host = xstrdup(hostandport); if (git_use_proxy(hostandport)) conn = git_proxy_connect(fd, hostandport); else @@ -698,40 +736,86 @@ struct child_process *git_connect(int fd[2], const char *url, target_host, 0); free(target_host); } else { - conn = xcalloc(1, sizeof(*conn)); + conn = xmalloc(sizeof(*conn)); + child_process_init(conn); strbuf_addstr(&cmd, prog); strbuf_addch(&cmd, ' '); sq_quote_buf(&cmd, path); + /* remove repo-local variables from the environment */ + conn->env = local_repo_env; + conn->use_shell = 1; conn->in = conn->out = -1; - conn->argv = arg = xcalloc(7, sizeof(*arg)); if (protocol == PROTO_SSH) { - const char *ssh = getenv("GIT_SSH"); - int putty = ssh && strcasestr(ssh, "plink"); + const char *ssh; + int putty = 0, tortoiseplink = 0; char *ssh_host = hostandport; const char *port = NULL; + transport_check_allowed("ssh"); get_host_and_port(&ssh_host, &port); - port = get_port_numeric(port); - if (!ssh) ssh = "ssh"; + if (!port) + port = get_port(ssh_host); + + if (flags & CONNECT_DIAG_URL) { + printf("Diag: url=%s\n", url ? url : "NULL"); + printf("Diag: protocol=%s\n", prot_name(protocol)); + printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL"); + printf("Diag: port=%s\n", port ? port : "NONE"); + printf("Diag: path=%s\n", path ? path : "NULL"); + + free(hostandport); + free(path); + free(conn); + return NULL; + } + + ssh = get_ssh_command(); + if (!ssh) { + const char *base; + char *ssh_dup; + + /* + * GIT_SSH is the no-shell version of + * GIT_SSH_COMMAND (and must remain so for + * historical compatibility). + */ + conn->use_shell = 0; + + ssh = getenv("GIT_SSH"); + if (!ssh) + ssh = "ssh"; + + ssh_dup = xstrdup(ssh); + base = basename(ssh_dup); + + tortoiseplink = !strcasecmp(base, "tortoiseplink") || + !strcasecmp(base, "tortoiseplink.exe"); + putty = tortoiseplink || + !strcasecmp(base, "plink") || + !strcasecmp(base, "plink.exe"); + + free(ssh_dup); + } - *arg++ = ssh; - if (putty && !strcasestr(ssh, "tortoiseplink")) - *arg++ = "-batch"; + argv_array_push(&conn->args, ssh); + if (flags & CONNECT_IPV4) + argv_array_push(&conn->args, "-4"); + else if (flags & CONNECT_IPV6) + argv_array_push(&conn->args, "-6"); + if (tortoiseplink) + argv_array_push(&conn->args, "-batch"); if (port) { /* P is for PuTTY, p is for OpenSSH */ - *arg++ = putty ? "-P" : "-p"; - *arg++ = port; + argv_array_push(&conn->args, putty ? "-P" : "-p"); + argv_array_push(&conn->args, port); } - *arg++ = ssh_host; + argv_array_push(&conn->args, ssh_host); } else { - /* remove repo-local variables from the environment */ - conn->env = local_repo_env; - conn->use_shell = 1; + transport_check_allowed("file"); } - *arg++ = cmd.buf; - *arg = NULL; + argv_array_push(&conn->args, cmd.buf); if (start_command(conn)) die("unable to fork"); @@ -757,7 +841,6 @@ int finish_connect(struct child_process *conn) return 0; code = finish_command(conn); - free(conn->argv); free(conn); return code; } |